Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure 1 Confidential 1. Alignment procedure (for function adjustment) A. Preparation: 1. Setup input timing ICL-605, 32-Grays pattern. 2. Setup unit and keep it warm up at least 30 minutes. B. Timing adjustment: 1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”). 2. Check the settings to following values: Contrast = 50 Brightness = 90 Volume = 30 OSD time = 20 Color = sRGB Language = English Then, turn off the monitor power. 3. Turn on power enter user area. C. Color balance adjustment: 1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”). 2. Setup input timing ICL-605 (1280*1024 75Hz), 5-MOSAIC pattern.(timing 202 pattern 42) 3. Press”I-key”,to enter window for whitebalance and burning mode. 4. Press “Whitebalance”, to Calibrate ADC. 5. Setup input timing ICL-605, 32 -Gray pattern. 6. Checking if the picture is no good, reject this monitor. D. Color adjustment: 1. Setup input timing ICL-605, white pattern. 2. Measure color temperature by Minolta CA-110 (or equivalent equipment). 3. Alignment the color temperature Bluish, Reddish & sRGB. The color temperature specification as follows: X+- 0.283+(-) 0.03 White Balance (Bluish, 9300K set on OSD) Y+- 0.297+(-) 0.03 X+- 0. 326+(-) 0.03 White Balance (Reddish, 5800K set on OSD) Y+- 0. 342+(-) 0.03 X+- 0. 313+(-) 0.03 White Balance (sRGB, 6500K set on OSD) Y+- 0. 329 +(-) 0.03
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
1 Confidential
1. Alignment procedure (for function adjustment) A. Preparation:
1. Setup input timing ICL-605, 32-Grays pattern. 2. Setup unit and keep it warm up at least 30 minutes.
B. Timing adjustment: 1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”). 2. Check the settings to following values:
Contrast = 50 Brightness = 90 Volume = 30 OSD time = 20 Color = sRGB Language = English
Then, turn off the monitor power. 3. Turn on power enter user area.
C. Color balance adjustment: 1. Enter factory setting area (press “ENTER”, “EXIT” and then press “SOFTPOWER”). 2. Setup input timing ICL-605 (1280*1024 75Hz), 5-MOSAIC pattern.(timing 202 pattern 42) 3. Press”I-key”,to enter window for whitebalance and burning mode. 4. Press “Whitebalance”, to Calibrate ADC. 5. Setup input timing ICL-605, 32 -Gray pattern. 6. Checking if the picture is no good, reject this monitor.
D. Color adjustment: 1. Setup input timing ICL-605, white pattern. 2. Measure color temperature by Minolta CA-110 (or equivalent equipment). 3. Alignment the color temperature Bluish, Reddish & sRGB. The color temperature
specification as follows:
X+- 0.283+(-) 0.03 White Balance (Bluish, 9300K set on OSD) Y+- 0.297+(-) 0.03
X+- 0. 326+(-) 0.03 White Balance (Reddish, 5800K set on OSD) Y+- 0. 342+(-) 0.03
X+- 0. 313+(-) 0.03 White Balance (sRGB, 6500K set on OSD) Y+- 0. 329 +(-) 0.03
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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4. Turns off the monitor power.
E. Writing EDID file: 1. Setup a PC with DDC card. 2. Connect PC to monitor with a D-sub signal cable. 3. Please refer to the C212 for the correct EDID file. 4. Runs the writing program to write the EDID file into EEPROM for analog input, ie. 15-pin
D-sub. 5. Read both EEPROM data and confirm it to match with the C212 document definition. 6. Connect PC to monitor with a DVI-D signal cable. 7. Please refer to the C212 for the correct EDID file. 8. Runs the writing program to write the EDID file into EEPROM for DVI input, ie. 24-pin
DVI-D. 9. Read both EEPROM data and confirm it to match with the C212 document definition.
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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F. Command definition: PC Host will send 0x7C IIC slave address and then following 4 bytes command I2C Send Command Byte1 Byte2 Byte3 Byte4 Write Contrast CA 55 Data checksum Write Brightness CA 56 Data checksum Write Red Gain CA 57 Data checksum Write Green Gain CA 58 Data checksum Write Blue Gain CA 59 Data checksum Read Contrast C3 55 XX checksum Read Brightness C3 56 XX checksum Read Red Gain C3 57 XX checksum Read Green Gain C3 58 XX checksum Read Blue Gain C3 59 XX checksum Write C1 (Bluish) R-Gain Data to NVRAM AA 3C Data checksum Write C1 (Bluish) G-Gain Data to NVRAM AA 3D Data checksum Write C1 (Bluish) B-Gain Data to NVRAM AA 3E Data checksum Write C2 (sRGB) R-Gain Data to NVRAM AA 4C Data checksum Write C2 (sRGB) G-Gain Data to NVRAM AA 4D Data checksum Write C2 (sRGB) B-Gain Data to NVRAM AA 4E Data checksum Write C3 (Reddish) R-Gain Data to NVRAM AA 5C Data checksum Write C3 (Reddish) G-Gain Data to NVRAM AA 5D Data checksum Write C3 (Reddish) B-Gain Data to NVRAM AA 5E Data checksum Write User R-Gain Data to NVRAM AA 6C Data checksum Write User G-Gain Data to NVRAM AA 6D Data checksum Write User B-Gain Data to NVRAM AA 6E Data checksum Read C1 (Bluish) R-Gain data from NVRAM A3 3C XX checksum Read C1 (Bluish) G-Gain data from NVRAM A3 3D XX checksum Read C1 (Bluish) B-Gain data from NVRAM A3 3E XX checksum Read C2 (sRGB) R-Gain data from NVRAM A3 4C XX checksum Read C2 (sRGB) G-Gain data from NVRAM A3 4D XX checksum Read C2 (sRGB) B-Gain data from NVRAM A3 4E XX checksum Read C3 (Reddish) R-Gain data from NVRAM A3 5C XX checksum Read C3 (Reddish) G-Gain data from NVRAM A3 5D XX checksum Read C3 (Reddish) B-Gain data from NVRAM A3 5E XX checksum Read User R-Gain data from NVRAM A3 6C XX checksum Read User G-Gain data from NVRAM A3 6D XX checksum Read User B-Gain data from NVRAM A3 6E XX checksum Change Color Temperature to C1 (Bluish) CC 1 XX checksum Change Color Temperature to C2 (sRGB) CC 2 XX checksum Change Color Temperature to C3 (Reddish) CC 3 XX checksum Change Color Temperature to User CC 4 XX checksum
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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User mode to factory mode 1A 5A XX checksum Auto Color (Offset1, Offset2, Gain) 1B 5A XX checksum Factory mode to User mode 1E 5A XX checksum Clear user area data 1F 5A XX checksum On burn in mode CE 1 XX checksum Off burn in mode CE XX* XX checksum Change Language Setting 66 0~7 XX checksum *: Any value except 1 can off burn-in mode Read EEPROM Bank-0 B0 Address XX checksum Read EEPROM Bank-1 B1 Address XX checksum Read EEPROM Bank-2 B2 Address XX checksum Read EEPROM Bank-3 B3 Address XX checksum Read EEPROM Bank-4 B4 Address XX checksum Read EEPROM Bank-5 B5 Address XX checksum Read EEPROM Bank-6 B6 Address XX checksum Read EEPROM Bank-7 B7 Address XX checksum Write EEPROM Bank-0 B8 Address Data checksum Write EEPROM Bank-1 B9 Address Data checksum Write EEPROM Bank-2 BA Address Data checksum Write EEPROM Bank-3 BB Address Data checksum Write EEPROM Bank-4 BC Address Data checksum Write EEPROM Bank-5 BD Address Data checksum Write EEPROM Bank-6 BE Address Data checksum Write EEPROM Bank-7 BF Address Data checksum Note A: Byte4(Checksum) = Byte1 + Byte2 + Byte3 Note B: Data = The value write to MCU Note C: XX = don't care, any value(<=0xFF). Note D: The Byte-2 definition of “Change Language Setting” is as below,
0=DE, 1=EN, 2=ES, 3=FR, 4=IT, 5=JA, 6=繁中, 7=簡中 When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes) Return Code R-Byte1 R-Byte2 Checksum error code FC AA
Normal return code the above Byte3
(/data) FC If normal return code is exact FCh FC CF The Table is for alignment machine to read data from EEPROM to check if the alignment process and write data are correct.
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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Read EEPROM Contrast A3 92 XX checksum Read EEPROM Brightness A3 93 XX checksum Read EEPROM C/T Point A3 94 XX checksum Read EEPROM OSD-Hpos A3 95 XX checksum Read EEPROM OSD-Vpos A3 96 XX checksum Read EEPROM Language A3 97 XX checksum Read EEPROM OSD Timer A3 98 XX checksum Read EEPROM Volume A3 99 XX checksum Additional define for OEM model, for reference only. Write sRGB Contrast CA 53 Data checksum Write sRGB Brightness CA 54 Data checksum Write Serial number byte 0~9 AA 0~9 XX checksum Read Serial number byte 0~9 A3 0~9 XX checksum
Table 1.
Incoming display mode (Input timing)
Resolution Horizontal Frequency (KHz)
Vertical Frequency (Hz)
Dot Clock Frequency (MHz)
Remark*720x400 31.47(N) 70.08(P) 28.32 DOS*800x600 46.86(P) 75.00(P) 49.50 VESA
*1280x1024 80.00(P) 75.00(P) 135.00 VESA*1280x1024 81.18(N) 76.16(N) 135.09 SUN
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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2. Dressing
A. Check the 4 springs and 5 spacers on the BKT
B. Connect 2 with 1 then connect to connector 3
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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C. Fix DVI BD with spacers
D. Place I/F BD and SPS BD in the BKT
E. Screws on the interface & power board(toltal 10 screw)
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
9 Confidential
F. Plastic fixture on the interface board and place D-sub cover
G. Screw D-SUB cover on the BKT:
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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H. Two gaskets at the bottom of BKT
I. Taping LVDS FFC on the panel:
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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J. Place BKT on the panel and fasten FFC with I/F BD
K. Place an iron cover and screw it on BKT
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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L. Two screws on panel right side
M. Two screws on panel left side
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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N. Paste aluminum tape on the backlight wire hole
O. Spring on control board and fix CTRL BD on BZL
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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P. Contorl board 9pin wire dressing
Q. Screw up uppercase with 5 screw
Q7T3-FP737S Dual function LCD Monitor Service Guide Alignment Procedure
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R. Screw column with uppercase with 2 screw
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
G+
B+
R+
RXC-RXC+
RX0-RX0+
RX1-RX1+
RX2-RX2+
DSUB_SDA
3.3V_MPC5V
3.3V_MCU
3.3V_MCU
3.3V_MCU
3.3V_MCU
PC5V
3.3V_MCU
PC5V_OFF
RED+
VSYNC
BLUE+
HSYNC
RED-
DSUB_SCL
GREEN+
GREEN-
BLUE-
DVIPC5V
DVISCL
DVISDA
A-detect
D-detect
DVIPC5V RX0-
RX0+
RX1-
RX1+
RX2-
RX2+
RXC-
RXC+
RXC-RXC+
RX0-RX0+
RX1-RX1+
RX2-RX2+
DVISCLDVISDA
RX0M
RX1P
RX0P
RX2P
RXCP
RX2M
RX1M
RXCM
Title
Size Document Number R ev.
Date: Sheet o f
Project Code
Reviewed By Approved ByPrepared By
Model Name
PCB P/N PCB Rev.
Benq CorporationOEM/ODM Model Name
99.L8372.000-C3-304-006
INTERFACE BOARD
1 6
ARSENIO LIU ARIES CHU
48.L8301.S72 S72
ANGEL HU
<Size>
Q7T399.L8372.001
0
Tuesday, December 23, 2003
<OEM/ODM>
10/9 '03R1:10K --> 2K.
PC5V 3.3_MCU PC5V_OFF + - H + + L - + Don't care
If both PC5V and 3.3_MCU exist:PC5V_OFF should set "LOW" to prevent PC5V from enteringthe system.When only PC5V exists:PC5V_OFF should set "HIGH" to provide CPU power.Actually, in the initial state, NO PC5V_OFF, if VGAcable is connected, PC5V exists --> Q4 will ON.That will make 3.3_M = 3.3V.
DVIPC5VGND
Q22N3906
32
1 C1 47P J
R24
10K
U1
AT24C02
A01
A12
A23
GND4
VCC 8
WP 7
SCL 6
SDA 5
R4
75
C490.01U K
D4BZV55-C5V1
AK
R14 100
R16 100
R107
10
TP2
TP86
TP92
DN11BAV99 A
J
K
C100.1U K
C3 47P J
TP12
DN7BAV99 A
J
K
R17 100
R103
10TP87
R7 100
D9BZV55-C5V1
AK
TP93
R101
10
R94.7K
DN3BAV99A
J
K
TP94
DN4
BAV70LT1
2
3
1
R8 100
C4 47P J
J101
2061106210
1 23 45 67 89 10
11 1213 1415 1617 1819 20
R108
10
TP6
D6
BZV55-C5V1
AK
C480.01U K
DN10BAV99 A
JK
R6 100
R104
10
DN6BAV99 A
J
K
R102K
R11 100
R12K
TP95TP88
DN2BAV99A
J
K
R204.7K
R2
75
D5BZV55-C5V1
AK
C5 47P J
R3
75
D2BZV55-C5V1
AK
D13.3V
12
TP89
TP3
C750.1U K
R105
10
TP96
DN9BAV99 A
JK
TP9
TP7
C1010.01U K
DN5BAV99 A
J
K
DN1BAV99A
J
K
J1
2024012015
1728394105
11
12
13
14
15
6
1617
R214.7K
C6 47P J
TP97
R5
47
TP90
TP10
C847P J
TP98
Q32N3904
1
32
R22 47
R106
10
Q12N3906
32
1
R15 1K
R18
10K
DN12BAV99 A
J
K
C947P J
TP91 DN8BAV99 A
JK
TP1
R13 100
TP4
DN14BAV99 A
J
K
R23 47
D3BZV55-C5V1
AK
TP11
C2 47P J
R102
10
D7BZV55-C5V1
AK D8
BZV55-C5V1
AK
R19
10K
DN15BAV99A
J
K
TP150
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
WRZ3
CSZ3RDZ3
3.3V_MCU
+2.5V
3.3V_MCU
3.3V_MCU
VDPLL
VPLLVAD
VDVI
3.3V_MCU
VDPLL
3.3V_MCU
VDVI
VDVI
VPLL
VAD
3.3V_MCU+2.5V
3.3V_MCU
GA1PGA1NGA2PGA2NGA3PGA3N
BRT_ADJ
AD0AD1AD2AD3
BA1PBA1NBA2PBA2NBA3PBA3N
TXO2-TXO2+
TXEC+TXEC-
RB1PRB1NRB2PRB2NRB3PRB3N
GB1PGB1NGB2PGB2NGB3PGB3N
12M BB1PBB1NBB2PBB2NBB3PBB3N
ESPOSPGPO0GPO1GPO2GPO3GPO4
CLKANCLKBPCLKBN
RX2PRX2MRX1PRX1MRX0PRX0MRXCPRXCM
RA1P
RED+RED-GREEN+
RA1NRA2P
RESETINT
RA2NRA3P
GREEN-
BLUE+BLUE-HSYNCVSYNC
RA3N
CLKAP
Title
Size Document Number Rev.
Date: Sheet o f
Project Code
Reviewed By Approved ByPrepared By
Model Name
PCB P/N PCB Rev.
Benq CorporationOEM/ODM Model Name
99.L8372.000-C3-304-006
INTERFACE BOARD
2 6
ARSENIO LIU ARIES CHU
48.L8301.S72 S72
ANGEL HU
<Size>
Q7T399.L8372.001
0
Tuesday, December 23, 2003
<OEM/ODM>
BUStype=High: Direct DDR Bus
BUStype=Low : 3-wire Bus
Current setting=Direct DDR Bus
** R28 & C33 are reserved for ESD
Add C45 for Diagonal noise.Also reverse L1 and C19.L1, L3 and L4 change to 0 ohm for power ripple reduction.
3. Input / Output Signal Specification .......................................................................................10
3.1 Input Signal Requirements .........................................................................................................10 3.1.1 Signal cable (Directly attached to unit) ....................................................................................................... 10 3.1.2 Video signals: .................................................................................................................................................. 10 3.1.3 Sync signal:...................................................................................................................................................... 10
3.2 Function ........................................................................................................................................11 3.2.1 Support timing................................................................................................................................................. 11
3.3 Number of display colors: ...........................................................................................................12
3.4 Adjustment function ....................................................................................................................12
3.5 Power Supply Requirements.......................................................................................................12 3.5.1 Input Power Requirements ............................................................................................................................ 12 3.5.2 Output Power Requirement ........................................................................................................................... 13
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
2
Table of Contents
3.5.3 Power Management ........................................................................................................................................ 13
3.6 Specification of Inverter...........................................................................................................13
5.2 Construction and Materials on outer surface ...........................................................................17
5.3 Base ...............................................................................................................................................17
6.2 Mean Time to Repair...................................................................................................................17 6.2.1 Module Level: ................................................................................................................................................. 17 6.2.2 Component Level: .......................................................................................................................................... 17
6.3 Accessibility ..................................................................................................................................17 6.3.1 General: ............................................................................................................................................................ 17 6.3.2 Outside Cabinet, access to the following elements.................................................................................... 18 6.3.3 Cover Removal, Access ................................................................................................................................. 18
6.4 Equipment & Tools Required.....................................................................................................18 6.4.1 Standard Test Equipment............................................................................................................................... 18 6.4.2 Documentation ................................................................................................................................................ 18
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
3
Table of Contents
6.5 Electrical Emission and Energy Saving summary for TCO99 ................................................18 6.5.1 Electrical Field(AC): ...................................................................................................................................... 18 6.5.2 Magnetic Field(AC): ...................................................................................................................................... 18 6.5.3 Energy Saving: ................................................................................................................................................ 18
Fig. 1 Physical Dimension Front View and Side view .................................................................19
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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1. Introduction This specification describes a 17.0” color TFT LCD monitor which is supported by analog interface solution and support
maximum resolution 1280x1024 at 76 Hz refresh rate. It has the following features:
- User controls: (a) “Power on/off” switch. (b) “Exit” key( Back to main menus or leave OSD menu). (c) “I-key”( For auto adjust vertical position, phase, horizontal position and pixel clock ). (d) “Enter” key(For enter sub-menus or select items. And hot key lock / unlock mode). (e) “Left” key (Select left, decreasing adjust and hot key of Contrast mode). (f) “Right” key (Select right, increasing adjust and hot key of Brightness mode).
- OSD window for control and information display with 8 languages selection. - DPMS (Display Power Management System) - Power on/off indicator. - High quality advanced zoom function (Scaling function)
- Tilt base : Attached base with 0~25 degree tilt. -DDC2B function supported.
- A LCD monitor (a)Head part:
(1) A LCD module(CPT 170EA03). (2) An AC power and inverter board. (3) An Interface board. (4) A control board. (5) A 15pin D-sub connector .
(b) Base part:
(1) Tilt base. (2)Foldable - A power cord - An user menu.
-Setup disk. (including .INF/.ICM/Test pattern) --all INF/ICM/Test pattern are loaded in CD manual + Quick start guide
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
5
2. Operational Specification 2.1 Environment
2.1.1 Temperature
-Operating 0 to 40 oC -Storage -20 to 60 oC
2.1.2 Relative Humidity -Operating 10 to 90% Max. ( non-condensing) -Storage 10 to 95% Max. ( non-condensing)
2.1.3 Altitude -Operating 0 to 3,048m (10,000ft) -Storage 0 to 12,192m (40,000ft)
2.2 Transportation
2.2.1 Vibration Test (Package, Non-Operating) A) Sine-wave vibration for initial resonance sweeps and dwell
* Sine sweep
Frequency (Hz) Status 5 ~ 26.6 0.6G
26.6 ~ 50 0.016" 50 ~ 500 1.5G
Sweep times: 1 sweep / Per Axis (X,Y, and Z Axis ) * One major resonance dwell is required for each axis. Total dwell time at each resonance point shall be 15 minutes.
> 68.1 – 113.5 26 Upgrade one level of height before MP.
B) Drop Sequence
2
1
53
4
6
Surface 2. Front3. Bottom4. Rear5. Right6. Left
1. Top
Manufacturingjoint
-Corner 5-3-2 select at weakness side [the low left(or right) corner of the front panel]
-An edge drop with impact on the shortest edge radiating from corner 5-3-2
-An edge drop with impact on the next shortest edge radiating from corner 5-3-2
-An edge drop with impact on the longest edge radiating from corner 5-3-2
-A flat drop with impact on the rear
-A flat drop with impact on the front
-A flat drop with impact on the right
-A flat drop with impact on the left
-A flat drop with impact on the bottom
-A flat drop with impact on the top
After test, there is no electrical and mechanical damage permitted.
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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2.2.3 Vibration Test (Unpackaged, Non-Operating) 5~200Hz at 1.04g rms FREQUENCY (Hz) SPECTRUM LEVEL (g2/Hz)
2.0 0.0185 4.0 0.0300 8.0 0.0300
40.0 0.0030 55.0 0.0100 70.0 0.0100
200.0 0.0010
DURATION: 15 MINUTES PER AXIS. 2.2.4 HALF-SINE SHOCK
Test conditions: Test unit : 2 sets Each unit has to withstand 18 shocks.(3 shocks pre face) No- operation Half-sine wave Duration : 3ms Acceleration(G) : 75G
2.3 Packing Configuration
2.3.1 Container Specification
a. Shipping Container
Container Type 20'*8'*8'6" Steel 40'*8'*8'6" Steel 40'*8'*9'6"
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
9
2.4 Electrostatic Discharge Requirements The subject product must withstand 8 KV for contact discharge and 15 KV for air discharge of Electrostatic
Discharge and meet the acceptance criteria as specified IEC 801-2 .
2.5 Safety Requirements The display unit complies with the following safety standards and specifications. -UL compliance....standard for information-processing and business equipment, UL 1950. -CSA compliance...standard C22.2 No. 950-M89, data processing equipment. -TUV compliance...EN60950 safety specification-business equipment. -ISO13406-2 .Ergonomic Requirements of Visual Display. -Demko...EN60950. -Nemko...EN60950. -Semko...EN60950. -Fimko...EN60950.
2.6 EMI Requirements 1. This display unit complies with the following EMC rules and regulations.
-FCC compliance...FCC Rule, Part 15, Subpart B, Class B. -VCCI compliance...VCCI Rule, Class-2. -CE Mark Compliance... 89/336/EEC. EN55024, EN61000-4-2/-3/-4/-5/-6/-8/-11
EN55022, Class B. EN61000-3-2,EN61000-3-3.
-DNSF compliance...EN55022, Class B. -MPR2 compliance - TCO99 -C-Tick -BSMI -EPA
2. The sample for EMI agency approval should be under 4 dB of the limit. The production pilot run units should be under 3 dB of the limit. The mass production units should be under 1 dB of the limit.
2.7 Reliability 1. The prediction MTBF of display unit shall be greater than 60,000 hours excluding the lamp.(at 25 ℃) 2. Lamp life time : 40,000 hrs typical at which brightness of lamp is 50% compare to that of initial value at 7.0mA and 25℃.
2.8 Mechanical Design for TCO 99: 1) Front Frame Reflectance:
Plastic weight > 25g shall be marked in accordance with ISO11469
3) Variety of Plastic:
All plastic components that weight > 100g shall be made from the same type of plastic.
4) Painting of Plastic: *Any plastic components that weight >100g shall not be painted lacquer or vanished, so that the paint, lacquer or vanish in dry matter exceed 1 weight-% of the plastic component.
* Mould decoration (IMD) is not allowed * All paints, lacquers, vanishes or colour additives used shall be declared by the type and mount.
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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5) Metallization of Plastic Housing:
* Metallization is not allowed.
6) Plastic components > 25g shall not contain retardants of organically bound chloride or bromide.
2.9 Environment Protection Design: Product is Per ES 715-c49 Environment Design Guide
2.10 Acoustical Noise With the display operating, the issue of sound measured is contained within 40 dB/A in the audible field.
3. Input / Output Signal Specification
3.1 Input Signal Requirements 3.1.1 Signal cable (Directly attached to unit)
3.1.1.1 Video Inputs:
(1) DSUB –digital Signal Inputs 15pin D-sub connector is on the captive signal cable for IBM VGA, compatible graphic adapters.
The pin assignment of this connector is described as below:
15
610
1115 15pin D-sub female
1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 10 SYNC GROUND 11 GROUND 12 SDA 13 H SYNC (H+V) 14 V SYNC 15 SCL
3.1.1.2 Cable length: 1600mm +/- 20mm
3.1.2 Video signals: RGB separate, Analog 0.7Vp-p/75 Ohm
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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Notes:
(1) If the incoming display mode is not supported by this I/F board listed above, the picture can show up or doesn’t which is unpredictable, even the picture can display but probably isn’t good or clear.
(2) Some signals from graphics board may not function properly.
(3) “P”, “N” stands for “Positive”, “Negative” polarity of incoming HSYNC/VSYNC(input timing).
(4) OSD will show “No Signal” message on the screen as below to indicate it while no display mode inputs.
(5) OSD will show “Out of Range” message on the screen to indicate it while input display mode meet the following condition
(a) The resolution is large than 1280x1024.
(b) The resolution is 1280x1024 but it frequency of vertical sync (Fv) is large than 77Hz.
(c) The frequency of horizontal sync (Fh) is large than 82KHz.
(d) The frequency of vertical sync (Fv) is large than 76Hz.
3.3 Number of display colors: 16M color numbers (With Dithering)
3.4 Adjustment function Brightness Contrast Display position (Vertical , Horizontal) Phase Pixel clock Color gain(Red, Green, Blue) OSD position (Vertical , Horizontal) Multi-language selection OSD time Recall function(Position Recall、Color Recall、Recall All)
3.5 Power Supply Requirements 3.5.1 Input Power Requirements
(1) Input Voltage Range The unit shall meet all the operating requirements with an input voltage range of 90~264 Vac .
(2) Input Current
Maximum Input Current Measuring Range (MAX) 2 Arms 90Vac 〜 264Vac
(3) Frequency Range
The unit shall operate within a frequency range of 47Hz to 63Hz.
(4) Inrush Current
Power supply inrush current shall be less than the ratings of its critical components(including Power switch, fuse, rectifiers and surge limiting device) for all conditions of line voltage.
(5) Regulator Efficiency
70% minimum (measuring at 115Vac and full load) Power saving mode < 1 Watts
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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3.5.2 Output Power Requirement The power circuit shall supply DC power outputs as followings: Output Nominal Regulation Load Current Range
1 12V-panel ±10% 0 ~ 0.25A
2 3.3V-panel ±10% 0 ~ 0.1A
3 3.3V-Fix ±5% 0 ~ 1.0A
3.5.3 Power Management
Mode H/Vsync Power consumption LED Color (Status)
Recovery Time
Normal Both exist < 40W Green (Normal) --
off None or Only one exist < 1W Amber 5 sec
3.6 Specification of Inverter The backlight system is an edge-lighting type with 4 CCFLs (Cold Cathode Fluorescent Tube).
The characters of dual lamps are shown in the following tables.
ITEM SYMBOL MIN TYP MAX Unit Condition Lamp Voltage VL -- 710 -- V IL=7.0 mA
Lamp Current IL 10 14 16 mA Each connectorInverter Frequency FL 45 50 70 kHz
-- 1350 V Tb=0 oC Starting lamp voltage VS -- 1080 V Ta=25oC
Lamp life time LT -- 50,000 (40,000) -- Hr
IL = 6.0mA Continuous Operation
(IL=7.0 mA)
NOTE: 1.All condition are at 25C ambient unless otherwise specified. 2. Load Panel=SXGA 17”
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
14
3.7 Panel optical Characteristics Item Condition Symbol Min. Typ. Max. Unit
Contrast Ratio ψ=0°,θ=0° CR 360 450 -- --
Vertical Up
Down
ψ=0° (CR>=10)ψ=0° (CR>=10)
θ θ
-55~55 -55~55
-65~65 -65~65
-- --
Deg. Deg.
Viewing Angle
Horizontal Left
Right
θ=0° (CR>=10)θ=0° (CR>=10)
ψ ψ
-60~60 -60~60
-70~70 -70~70
-- -
Deg. Deg.
25±2.5°ψ=0°,θ=0°
Tr Tf
-- --
-- --
9 16
-- --
ms ms
Response Time Rise Time Fall Time Cross Talk ψ=0°,θ=0° Tr+Tf -- -- 25 -- ms
White Luminance Center point at CCFL 7.0mA -- 240 300 -- cd/m²
Brightness Uniformity θ=ψ=0° -- 70 -- -- %
Crosstalk θ=ψ=0° CMR -- -- 1 %
Chromaticity
Red x y Green x y Blue x y White x y
ψ=0°,θ=0°
0.607 0.314 0.280 0.552 0.113 0.070 0.283 0.299
0.637 0.344 0.310 0.582 0.143 0.100 0.313 0.329
0.667 0.374 0.340 0.612 0.173 0.130 0.343 0.359
--
Note: 1. Viewing Angle, Contrast Ratio, Response Time, Reflectance, and Chromaticity are measured at panel center. 2. Viewing Angle(θ, ψ)
See figure below
Measurement is done on position 1. Viewing angle origine is the axis normal to the flat panel. Left (L) and Right (R) valueare the maximum angles for which CR=10. Up (U) and (D) value are the maximumangles for which CR=10.
Normal Ey �
Ö� xÖ = 0 , Right
Ö = 90 , Up
Ö = 180 , Left
Ö = 270 , Down
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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3.Contrast Ratio (CR) is defined mathematically as:
)0φ ,0θ(at
(Min.) el Black Levin Luminance
(Max.) LevelWhite in Luminance
oo ==
4. Response time
TrR measures the transition time of L1 relative luminance from white to black state, from 90% to 10% (see graph below) TrD measures the transition time of L1 relative luminance from black to white state, from 10% to 90% (see graph below)
5. Cross talk shall be measured between two patterns.
FULL WHITE
184 gray level
0 gray level
1/2 1/6 2/3 1/61/2 1/3
1/6
1/31/2
2/3
A A'
B B'
184 gray level
l LA-LA’ l / LA x 100%= 1.2% max., LA and LB are brightness at location A and B l LB-LB’ l / LB x 100%= 1.2% max., LA’ and LB’ are brightness at location A’ and B’
LA:Luminance of measured point in A (cd/m2) LB:Luminance of measured point in B (cd/m2) LA’:Luminance of measured point in A’ (cd/m2) LB’:Luminance of measured point in B’ (cd/m2)
(at Viewing Angle o0φ0θ
o == , )
100% 90%
TrR TrD
WHITEBLACK
10% 0% t
WHITE
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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6. Brightness Uniformity of these 9 points is defined as below:
5
110%
90%
50%
90% 10%50%
2
4
3
6
7 8 9
Brightness Uniformity = Min. brightness / Max. brightness x 100 % > 70%
4. Functional specification All the tests to verify specifications in this section must be performed under the following standard conditions
unless otherwise noted. The standard conditions are:
-Temperature : 0 to 40 degree Celsius -AC line input voltage : 90 Vac to 264 Vac, 47Hz or 63Hz -Warm-up time : 30 minutes minimum
4.1 Display Quality 4.1.1 Display Data Area (with full white pattern)
(1) Horizontal: 337.920 mm (2) Vertical: 270.336 mm
4.1.2 Video Performance (1) Resolution : 1280 X 1024 pixels Maximum (2) Contrast ratio : 360(Min.), 450(Typ.) (3) Response time : 25 mS(Typ.) (4)Viewing angle : Up:65° Down:65° R/L:70° (At contrast ratio >= 10) (5)CIE Coordinate: White ( 0.313, 0.329 ) +/- (0.03, 0.03) (at user mode) (6) Display color: 18 bits color
All panels, covers, and major assemblies are removable without disruption of permanent mounting or fasteners.
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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6.3.2 Outside Cabinet, access to the following elements -Operating Controls -AC Inlet -Audio in
6.3.3 Cover Removal, Access All sub assemblies and internally adjustable components may be accessed by removing the base and the rear cover .
6.4 Equipment & Tools Required 6.4.1 Standard Test Equipment
(1) Voltmeter (2) Dual trace oscilloscope (3) Hand tools as required (4) Computer with IBM VGA , or compatible graphic adapter
6.4.2 Documentation A service manual will be available which covers all service requirements. A users manual written
in Japanese German, Italian, Spanish, France and English will be available to ship with the product. 6.5 Electrical Emission and Energy Saving summary for TCO99
6.5.1 Electrical Field(AC): *Band I< 10V/m (132cd/m^2,”+” pattern) *Band II< 1V/m (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
6.5.2 Magnetic Field(AC): *Band I< 200nt (132cd/m^2,”+” pattern) *Band II< 32nt (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
ITEM State Power OFF Brightness 90 Contrast 50 OSD- Timeout 20s OSD-Language English OSD-Image size Full Screen
OSD-Color temp CU MODE
Q7T3(CPT panel) LCD Monitor Service Guide Engineering Specification
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Fig. 1 Physical Dimension Front View and Side view
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
1
I. Introduction: The Q7T3-CPT is a 17” SXGA (1280x1024) , 26.2 K colors(R, G, B 6-bit data) TFT LCD
monitor without multi-media function. It’s an analog interface LCD monitor with a 15 pins D-sub signal cable and it’s compliant with VESA specification to offer a smart power management and power saving function. It also offers OSD menu for users to control the adjustable items and get some information about this monitor, and the best function is to offer users an easy method to set all adjustable items well just by pressing one key, we called it “Auto key” which can auto adjusting all controlled items. Q7T3-CPT also offer DDC2 function to meet VESA standard.
II. Block diagram
The Q7T3-CPT consists of a head and a stand (base). The head consists of a LCD module with 4 lamps, a power board (include AC/DC, DC/DC and inverter board), a control board and interface BD. The block diagram is shown as below.
III. Circuit operation theory:
A.) HEAD: A-1.) Interface board diagram:
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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(a) Circuit operation theory: A basic operation theory for this interface board is to convert analog signals of Red, Green, Blue. The scaling IC has internal A/D converter, internal OSD and auto detect input timing functions. A/D converter is convert analog signal to digital data. OSD is offering adjustable functions to end-user. Detect timing is for detect change mode. Scalar finally output the digital RGB data, the Hsync, Vsync and pixel clock to LCD panel driver IC by RSDS interface. MCU also embedded in PW133A controls system processing. EEPROM is stored DDC data, OSD common data and user mode data. Flash-Rom is stored the source code which is accessed by MCU to run program.
(b) IC introduction: 1.) DDC (Display Data Channel) function: We use DDC IC to support DDC/2B function. DDC data
is stored in 24C02(EEPROM). Those data related to LCD monitor specification. PC can read them by “SDA” and “SCL” serial communication for I²C communication for DDC2B.
2.) PW133A IC : There are A/D, Scaling, OSD, MCU functions in the PW133A IC. Scaling IC is revolutionary scaling engine, capable of expanding any source resolution to a highly uniform and sharp image, combined with the critically proven integrated 8 bit triple-ADC and patented Rapid-lock digital clock recovery system. It also support detect mode and DPMS control. MCU
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
3
control unit, it controls all the functions of this interface board, just like the OSD display setting, the adjustable items, adjusted data storage, the external IIC communication, support DDC2B.
3.) EEPROM: We use 24C16 to store all the adjustable data and user settings. 4.) FLASH ROM: To stored the source code which is accessed by MCU to run program.
A-2.) Power board diagram:
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE, VCCI standard requirements.
EMI Filter Rectifier and
filter
Isolation power
transformer
Rectifier and filter Audio Amp and
Pre-Amp
PWM controller Switching element
Feedback Isolation
Inverter circuit
Rectifier and filter
LDO regulator
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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Fig. 2 #2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage is 1.4*(AC input). (See Fig.3)
Fig. 3
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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#3 Switching element and Isolation power transformer When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the stored energy is delivered to the secondary of transformer. R607, C607 and D601 is a snubber circuit. R615 is current sense resistor to control output power. (See Fig.4)
Fig. 4
#4 Rectifier and filter D701 and C703 are to produce DC output. L701 and C704 are to suppress high Frequency switching spikes. (See Fig.5)
Fig. 5
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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#5 PWM Controller The PWM controller NCP1200A implements a standard current mode architecture. With an internal structure operating at a fixed 40KHz. Where the switch time is dictated by the peak current set-point. When the current set-point falls below a given value. The output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency.
Fig. 6
#6 Feedback circuit PC123 is a photo-coupler and TL431 is a shunt regulation. They are used to detect the output voltage change and be the primary and secondary isolation. When output voltage changes, the feedback voltage will be compared and duty cycle will be decided to control the correct output voltage. (See Fig.7)
Fig. 7
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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A-3.) Control board introduction: The main parts of the control board are a push button, and a LED.
(a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto adjustment function, releasing it for “OFF” to do nothing. (c) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal operating condition). Amber light means DPMS off (Power off condition).
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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3.Circuit Operation Theorem 3.1 ON/OFF SWITCH
The turn-on voltage was controlled by R756 and R757.The inverter was turned on or off by the switching transistors Q761 and Q757, Also regulator IC751 is control by Q761 and Q757 decide supply 15V to inverter part or instead.
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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3.2 PWM Control circuit
TL1451 is a dual PWM controller.C765 and R765 decide the working frequency.BLT_ADJ signal is from control board, control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness. Q741 and Q742 be the buffer to rise the drive capability and the totem poles circuit can improve a capable of driving for Q743.C770 decide the striking time delay.
Q7T3 (CPT panel) LCD Monitor Service Guide Circuit Operation Theory
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3.3 Oscillator Circuit
Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power inject, Q759 or Q760 will turns on, and the current Ic increases. After a period, the transistor will leave the saturation status and Vce increase. The result causes the voltage of primary coil get lower. Finally the transistor turn off, and another transistor turn on. These statuses are repeated and the pin7 and pin8 of T751 will get a Sin Wave to turn on CCFL.
� Product System (PS)
Subject: ASS'Y Drawing Part No.: 99.L8372.CBE Rev.: 0
Doc. No. 99.L8372.CBE-C3-328-001
Project Code: 99.L8372.001 Component Part. No.: Page 1 of 1
Model Name: Q7T3
Form No: ACM0-0B-003-24(010918)
1
Release Notice
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
1
1.Alignment procedure (for function adjustment)
A. Preparation: 1. Setup input timing VGA_60Hz, Cross-Hatch ( General - I ) pattern. 2. The monitor power on at first time that will enter Factory OSD mode. (If not, Please press “Menu” and “Exit” plus
“Power” buttons at the same time. A “Factory” word will be showed on the upper left hand side of OSD Main menu.) Burn in mode have already started. (See Fig 1.). If it hasn’t started, Please choose “BURN IN MODE” tag and select “On” to enable burn-in mode.(See Fig2a ,2b)
3. Setup unit and keep it warm up at least 20 minutes
B. Timing adjustment:
1. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the same time to enter factory mode.).
2. Select timing from Table 1. The timing marked with star sign (*) have to be adjusted. 3. Execute “Recall All” (press “Yes”) to clear user area in EEPROM 4. The cursor moves to “AUTO Adjust ” or press “I-Key” to run “AUTO adjustment” function.(After AUTO adjustment,
Press “Exit key ” to exit “ AUTO Color Balance ” function. 6. Check the phase of the image; if phase is not perfect adjust it to the best condition. 7. Adjust the settings to following values:
CONTRAST = 50 BRIGHTNESS = 90 OSD TIME = 20 COLOR = sRGB
8. When Factory mode is disable (burn-in mode “off”) then power off after power on will enter user mode.
C. Color balance adjustment: 1. Setup input timing XGA_75Hz, 4 gray pattern.( chroma timing 307 , pattern 45) 2. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the
same time to enter factory mode.). 3. Setup the “Burn-in mode” is “On” 4. Select the color to user-preset mode. 5. At Main menu move cursor to “AUTO Adjust ” tag then press the “ENTER” or “I-Key” to run “ AUTO Adjust ”
function, then press “ RIGHT Key ” to run “ Auto Color Balance ” function . 6. Checking if the picture is no good, reject this monitor.
D. Color adjustment: 1. Setup input timing VGA_60Hz, white pattern. 2. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the
same time to enter factory mode.).
3. Move cursor into “BUR-IN MODE” tag and select “On” to enable burn-in mode. (If it wants to do “Auto Color balance”, please select the color to user-preset mode.)
4. Measure color temperature by Minolta CA-110 (or equivalent equipment). If the default value can’t meet color temperature spec. Please use Auto Alignment to calibrate the color temperature;
Bluish, & Reddish and sRGB. The color temperature specification as follows:
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
2
X+- 0.326+(-) 0.03White Balance
(Reddish, 5800K set on OSD) Y+- 0.342+(-) 0.03
230cd/m
X+- 0.313+(-) 0.03White Balance
(sRGB, 6500K set on OSD) Y+- 0.329+(-) 0.03
230cd/m
X+- 0.283+(-) 0.03White Balance
(Bluish, 9300K set on OSD) Y+- 0.297+(-) 0.03
200cd/m
5. Move cursor into “BURN IN MODE” tag and select “Off” to disable burn-in mode. 6. Turns off the monitor power.
E. Writing EDID file : 1. Setup a PC with DDC card.
2. Connect PC to monitor with a D-sub signal cable.
3. Please refer to the C212 for the correct EDID file.
4. Runs the writing program to write the EDID file into EEPROM for analog input, ie. 15-pin D-sub.
5. Read both EEPROM data and confirm it to match with the C212 definition.
F. Command definition:
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command Byte1 Byte2 Byte3 Byte4
Write Contrast CA 55 Data checksum
Write Brightness CA 56 Data checksum
Write Red Gain CA 57 Data checksum
Write Green Gain CA 58 Data checksum
Write Blue Gain CA 59 Data checksum
Read Contrast C3 55 XX checksum
Read Brightness C3 56 XX checksum
Read Red Gain C3 57 XX checksum
Read Green Gain C3 58 XX checksum
Read Blue Gain C3 59 XX checksum
Write Bluish(9300K) R-Gain Data to NVRAM AA 3C Data checksum
Write Bluish(9300K) G-Gain Data to NVRAM AA 3D Data checksum
Write Bluish(9300K) B-Gain Data to NVRAM AA 3E Data checksum
Write sRGB(6500K) R-Gain Data to NVRAM AA 4C Data checksum
Write sRGB(6500K) G-Gain Data to NVRAM AA 4D Data checksum
Write sRGB(6500K) B-Gain Data to NVRAM AA 4E Data checksum
Write Reddish(5800K) R-Gain Data to NVRAM AA 5C Data checksum
Write Reddish(5800K) G-Gain Data to NVRAM AA 5D Data checksum
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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Write Reddish(5800K) B-Gain Data to NVRAM AA 5E Data checksum
Write User R-Gain Data to NVRAM AA 6C Data checksum
Write User G-Gain Data to NVRAM AA 6D Data checksum
Write User B-Gain Data to NVRAM AA 6E Data checksum
Read Bluish(9300K) R-Gain data from NVRAM A3 3C XX checksum
Read Bluish(9300K) G-Gain data from NVRAM A3 3D XX checksum
Read Bluish(9300K) B-Gain data from NVRAM A3 3E XX checksum
Read sRGB(6500K) R-Gain data from NVRAM A3 4C XX checksum
Read sRGB(6500K) G-Gain data from NVRAM A3 4D XX checksum
Read sRGB(6500K) B-Gain data from NVRAM A3 4E XX checksum
Read Reddish(5800K) R-Gain data from NVRAM A3 5C XX checksum
Read Reddish(5800K) G-Gain data from NVRAM A3 5D XX checksum
Read Reddish(5800K) B-Gain data from NVRAM A3 5E XX checksum
Read User R-Gain data from NVRAM A3 6C XX checksum
Read User G-Gain data from NVRAM A3 6D XX checksum
Read User B-Gain data from NVRAM A3 6E XX checksum
Change Color Temperature to Bluish CC 1 XX checksum
Change Color Temperature to sRGB CC 2 XX checksum
Change Color Temperature to Reddish CC 3 XX checksum
Change C/T to User CC 4 XX checksum
User mode to factory mode 1A 5A XX checksum
Auto Color (Offset1, Offset2, Gain) 1B 5A XX checksum
Factory mode to User mode 1E 5A XX checksum
Clear user area data 1F 5A XX checksum
Off burn in mode CE 2 XX checksum
Change Language Setting 66 0~7 XX checksum
Note A: Byte4(Checksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU
Note C: XX = don't care, any value(<=0xFF).
Note D: The Byte-2 definition of “Change Language Setting” is as below,
0=DE, 1=EN, 2=ES, 3=FR, 4=IT, 5=JA, 6=繁中, 7=簡中
When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes)
Return Code R-Byte1 R-Byte2
Checksum error code FC AA
Normal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
4
The Table is for alignment machine to read data from EEPROM to check if the alignment process and write data are correct.
Read EEPROM Contrast A3 92 XX checksum
Read EEPROM Brightness A3 93 XX checksum
Read EEPROM C/T Point A3 94 XX checksum
Read EEPROM OSD-Hpos A3 95 XX checksum
Read EEPROM OSD-Vpos A3 96 XX checksum
Read EEPROM Language A3 97 XX checksum
Read EEPROM OSD Timer A3 98 XX checksum
Read EEPROM Volume A3 99 XX checksum
Table 1.
Incoming display mode (Input timing) Multi-scan
operation
Resolution Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Dot Clock
Frequency (MHz)Remark
Actual display
resolution
*640x480 31.47(N) 60.00(N) 25.18 DOS
*640x480 37.50(N) 75.00(N) 31.5 VESA
*800x600 37.88(P) 60.31(P) 40.00 VESA
*800x600 46.87(P) 75.00(P) 49.5 VESA
*1024x768 48.36(N) 60.00(N) 65.00 VESA
*1024x768 60.02(P) 75.00(P) 78.75 VESA *1152x864 67.50(P) 75.00(P) 108.00 VESA
*1280x1024 64.00(P) 60.00(P) 108.00 VESA
*1280x1024 80.00(P) 75.00(P) 135.00 VESA
Full Screen
1280 x 1024
Table 2
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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Fig 1. Factory Mode “On”
Fig 2a. Burn-In Mode Button
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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Fig 2b. Burn-In Mode “ON”
2.Wire Dressing a. RSDS Cable
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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b. Lamp wire with clip
c. Add 4 Pcs crew to BKT between panel grounding
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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d. Al-Foil-Mylar on the shielding cover
e. Spacer
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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f. Signal cable with clip
g. Bracket Cover
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
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h. Plug under AC socket
i. Main Grounding Wire
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
11
j. Control BD wire: conductive tape change to Clip
k. Shielding cover: conductive tape
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
12
l. Bracket with panel grounding spring
m. Ctrl BD with panel grounding spring
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
13
3. Add Glue a. C605
b. C603, C604, L606, L607
Q7T3(CPT Panel)LCD Monitor Service Guide Alignment Procedure
14
c. C615
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
1
I. Introduction: The Q7T3-FP767 is a 17” SXGA (1280x1024) , 262 K colors(R, G, B 6-bit data) TFT LCD
monitor with multi-media function. It’s an analog interface LCD monitor with a 15 pins D-sub signal cable and it’s compliant with VESA specification to offer a smart power management and power saving function. It also offers OSD menu for users to control the adjustable items and get some information about this monitor, and the best function is to offer users an easy method to set all adjustable items well just by pressing one key, we called it “Auto key” which can auto adjusting all controlled items. Q7T3-FP767 also offer DDC2 function to meet VESA standard.
II. Block diagram
The Q7T3-FP767S consists of a head and a stand (base). The head consists of a LCD module with 4 lamps, a power board (include AC/DC, DC/DC and inverter board), a control board and interface BD. The block diagram is shown as below.
AC-DC board
TFT-LCD module with 4 CCFL(backlight)
AC input
To backlight
Analog RGB signals
AC socket
Control board
DDC IC
EEPROMMCU
gm2120
LVDS Xmtr x 2Interface board
LVDS
D-sub connector
Flash ROM
Power sequence circuit
Inverter board
III. Circuit operation theory:
A.) HEAD: A-1.) Interface board diagram:
PW BD AC Socket
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
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Interface Board
Red Green Blue
Vsync
Hsync (/H+V)
A/D MCU Scaling OSD
To LCD module
EE
PRO
MSCL SDA
FLA
SH-
RO
M
DDC
gm2120
(a) Circuit operation theory: A basic operation theory for this interface board is to convert analog signals of Red, Green, Blue. The scaling IC has internal A/D converter, internal OSD and auto detect input timing functions. A/D converter is convert analog signal to digital data. OSD is offering adjustable functions to end-user. Detect timing is for detect change mode. Scaler generate the pixel clock to the LVDS transmitter. Finally output the digital RGB data, the Hsync, Vsync and pixel clock to LCD panel driver IC by LVDS transmitter. MCU also embedded in Gm2120 offers H/W DDC2Bi function & controls system processing. EEPROM is stored DDC data, OSD common data and user mode data. Flash-Rom is stored the source code which is accessed by MCU to run program.
(b) IC introduction: 1.) DDC (Display Data Channel) function: We use DDC IC to support DDC/2B function. DDC data
is stored in 24C02(EEPROM). Those data related to LCD monitor specification. PC can read them by “SDA” and “SCL” serial communication for I²C communication for DDC2B.
2.) Gm2120 IC: There are A/D, Scaling, OSD, MCU functions in the Gm2120 IC. Scaling IC is revolutionary scaling engine, capable of expanding any source resolution to a highly uniform and sharp image, combined with the critically proven integrated 8 bit triple-ADC and patented
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
3
Rapid-lock digital clock recovery system. It also support detect mode and DPMS control. MCU control unit, it controls all the functions of this interface board, just like the OSD display setting, the adjustable items, adjusted data storage, the external IIC communication, support DDC2B.
3.) EEPROM: We use 24C16 to store all the adjustable data and user settings. 4.) FLASH ROM: To stored the source code which is accessed by MCU to run program.
A-2.) Power board diagram:
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE, VCCI standard requirements.
EMI Filter Rectifier and
filter
Isolation power
transformer
Rectifier and filter Audio Amp and
Pre-Amp
PWM controller Switching element
Feedback Isolation
Inverter circuit
Rectifier and filter
LDO regulator
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
4
Fig. 2 #2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage is 1.4*(AC input). (See Fig.3)
Fig. 3
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
5
#3 Switching element and Isolation power transformer When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the stored energy is delivered to the secondary of transformer. R607, C607 and D601 is a snubber circuit. R615 is current sense resistor to control output power. (See Fig.4)
Fig. 4
#4 Rectifier and filter D701 and C703 are to produce DC output. L701 and C704 are to suppress high Frequency switching spikes. (See Fig.5)
Fig. 5
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
6
#5 PWM Controller The current mode control IC UC3842B is used to control PWM. When the VCC terminal of it gets 16V, IC601 turns on. +5V will be set up at Pin8 through soft start circuit, which includes R617, C611, D606 and D605. R616 and C610 generate a fixed frequency saw-tooth wave at Pin4.
Fig. 6
#6 Feedback circuit PC123 is a photo-coupler and TL431 is a shunt regulation. They are used to detect the output voltage change and be the primary and secondary isolation. When output voltage changes, the feedback voltage will be compared and duty cycle will be decided to control the correct output voltage. (See Fig.7)
Fig. 7
A-3.) Control board introduction: The main parts of the control board are a push button, and a LED.
(a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto adjustment function, releasing it for “OFF” to do nothing. (c) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal operating condition). Amber light means DPMS off (Power off condition).
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
8
3.Circuit Operation Theorem 3.1 ON/OFF SWITCH
The turn-on voltage was controlled by R756 and R757.The inverter was turned on or off by the switching transistors Q761 and Q757, Also regulator IC751 is control by Q761 and Q757 decide supply 15V to inverter part or instead.
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
9
3.2 PWM Control circuit
TL1451 is a dual PWM controller.C765 and R765 decide the working frequency.BLT_ADJ signal is from control board, control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness. Q741 and Q742 be the buffer to rise the drive capability and the totem poles circuit can improve a capable of driving for Q743.C770 decide the striking time delay.
Q7T3(AUO Panel) LCD Monitor Service Guide Circuit Operation Theory
10
3.3 Oscillator Circuit
Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power inject, Q759 or Q760 will turns on, and the current Ic increases. After a period, the transistor will leave the saturation status and Vce increase. The result causes the voltage of primary coil get lower. Finally the transistor turn off, and another transistor turn on. These statuses are repeated and the pin7 and pin8 of T751 will get a Sin Wave to turn on CCFL.
Q7T3(AUO panel) LCD Monitor Service Guide Trouble Shooting
1
Q7T3 TROUBLE SHOOTING GUIDE
No Display or display is unstable: 1.1 Interface Board:
No picture or picture unstable
Power off Yes Turn on power
No
Does cable plugs in No Check all of wire then turn on power
connector? switch again.
Yes
Does power stable? No Check Power BD
Yes
Is LED light green/orange? No Check control BD
Yes
Is LED status normal? No Check Flash Rom or replace it
Yes
Does crystal work correctly? No Check crystal CKT or replace it
Yes
Is interface BD normally? No Replace interface BD
Yes
Replace panel
Q7T3(AUO Panel) LCD Monitor Service Guide Trouble Shooting
2
2. BUTTON function: 2.1 Control Board OSD is not working Yes
Is control BD connecting? No Plug control BD then retry
Yes
Is bottom switch normally? Yes Replace control BD then retry
No
Replace Control BD
Is OSD working??
No
Check Interface BD
3. OSD function:
OSD doesn’t work
Is control BD working? No Replace control BD
Check interface BD
Q7T3(AUO Panel) LCD Monitor Service Guide Trouble Shooting
3
4. Power Board
Backlight didn't shine
LED shined?
3.3V existed? IS I/F board connected?
IC751 PIN 9 IS 15V?Replace Q761
PWM existed? (BLT_ADJ)
Plug CN701 again or checking I/F BD
Turn on level existed?(BLT_ON)
Insert them againCheck CN752, CN753 was pluged properly?
Plug CN601 again or checking PW BD
Replace IC751,Q751
Replace new fuse
Replace new fuse
Check IC701 OK?
Checking F601 Broke?
Check IC601 Vcc existed?
Replace IC602, IC702,D701 or check
I/F BD
Replace IC701
Replace new fuse
Replace IC601,Q602,Q603
R602
Y
N
N
N
N
Y
Y
Y
Y
N
Y
Y N
N
Y
Y
Y
N
N
N
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Title
Size Document Number R ev.
Date: Sheet o f
Project Code
Reviewed By Approved ByPrepared By
Model Name
PCB P/N PCB Rev.
Benq CorporationOEM/ODM Model Name
99.L8372.000-C2-204-004
INTERFACE BOARD
1 5
JAMSON LIU DAVEN WU
48.L8301.S11 S11
ANGEL HU
<Size>
Q7T3-FP767S99.L8372.001
0
Tuesday, February 11, 2003
NA
Optical Points
Screw Holes
H4
HOLE-V8
1
2
3
4
5
6
7
8
9OPOP4
OPOP14
OPOP7
H2
HOLE-V8
1
2
3
4
5
6
7
8
9
H1
HOLE-V8
1
2
3
4
5
6
7
8
9OPOP2
OPOP10
OPOP12
OPOP13
OPOP1
OPOP5
OPOP3
OPOP8
OPOP9H3
HOLE-V8
12
3
4
5
6
7
8
9
OPOP11
OPOP6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
PC5V
G+
B+
R+
R-
G-
B-
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
VS
HS
DSUB_SCL
DSUB_SDA
BLUE+
GREEN+
RED+
RED-
GREEN-
BLUE-
Cable-Detect
DVIPC5V
DVISCL
DVISDA
RX0-
RX0+
RX1-
RX1+
RX2-
RX2+
RXC-
RXC+
RX0M
RX0P
RX1M
RX1P
RX2M
RX2P
RXCM
RXCP
RX1+RX2+
RX1-RX0+
RX2-
RX0-
DVIPC5V
DVISCLDVISDA
RXC+RXC-
Title
Size Document Number Rev.
Date: Sheet o f
Project Code
Reviewed By Approved ByPrepared By
Model Name
PCB P/N PCB Rev.
Benq CorporationOEM/ODM Model Name
99.L8372.000-C2-204-004
INTERFACE BOARD
2 5
JAMSON LIU DAVEN WU
48.L8301.S11 S11
ANGEL HU
<Size>
Q7T3-FP767S99.L8372.001
0
Tuesday, February 11, 2003
NA
OPEN
DN10BAV99
1
3
2
TP4
R1022
U2C
74LVC14A
5 6
147
R7 22
C2 0.01U 50V K
R3
75
TP3
D1
TZMC5V11
2
R175
DN11BAV99
1
3
2
R184.7K
C5 0.01U 50V K
TP6
TP13
R11 47
DN1
BAV99
1
3
2
R14100
TP5
TP15
R4 56
R17
10K
C10.1U
16V K
R20 10K
R1322
TP17
U2A
74LVC14A
1 2
147
U1
AT24C02A
A01
A12
A23
VSS4
VCC 8
WP 7
SCL 6
SDA 5
TP7
R194.7K
DN4
BAV70LT1
2
3
1
C1247P50V J
U3
AT24C02A
A01
A12
A23
VSS4
VCC 8
WP 7
SCL 6
SDA 5
R12 56
C3 0.01U 50V K
C847P50V J
TP12
U2D
74LVC14A
9 8
147
J2
2061106212
123456789101112131415161718192021222324
TP8
R275
TP19
DN5BAV99
1
3
2
D5
TZMC5V1
12
DN12BAV99
1
3
2
C6 0.01U 50V K
DN3
BAV99
1
3
2
TP20
TP14
TP9
D6
TZMC5V1
12
DN100
BAV99
1
3
2
R15100
TP18
DN7BAV99
13
2
TP11
R62.7K
TP16
DN13BAV99
1
3
2
R52.7K
TP21
D7
TZMC5V1
12
TP22
D4
TZMC5V1
12
TP10
DN8BAV99
13
2
TP23
D8
TZMC5V1
12
C4 0.01U 50V K
J1
CON16
12345678910111213141516
DN2
BAV99
1
3
2
R8 56
TP2
C7 0.01U 50V K
D3
TZMC5V1
12
D2
TZMC5V1
12
C130.1U16V K
DN9BAV99
13
2
DN6
BAV70LT1
2
3
1
C100.1U16V K
TP1
C1147P50V J
R16
10K
R9 47
U2B
74LVC14A
3 4
147
C947P50V J
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
FLASH_WE
RMADDR[0..15]
RM
DA
TA[0
..7]
RMADDR5
RMDATA0RMADDR7
RMADDR11
RMADDR9
RMADDR10TXD
RMADDR11
RMDATA7
RMADDR14
RMDATA7
RMDATA2
SDA
SDA
RMADDR5
RMADDR10
RMDATA6RMADDR2RMDATA5RMADDR12
BANK
RMADDR1
RMADDR8
RMADDR1
RMADDR2
RMADDR8
RMDATA1
SCL
RMDATA1
RMDATA3
RMADDR3
RMADDR14RMDATA3
RMDATA0
RMADDR6RMADDR15
RMADDR13
ROM_OEn
RMADDR6
RMADDR7
RXD
RMDATA2
RMADDR12
RMDATA6
RMDATA4
RMADDR3
RMDATA4
RMADDR4RMADDR9
RMADDR13
RMADDR15
RMADDR8
SCLRMDATA5
RMADDR14
BANK
RMADDR9
RMADDR0
RMADDR0
RMADDR4FLASH_WE
3.3V_DDDS3.3V_SDDS
3.3V_RDDS
3.3V_RGB
3.3V_DVI
2.5V_RXPL
TXDRXD
D EN
DCLK
TCLKXTAL
3.3V_DVI
D HSDVS
Reset
+3.3V
+2.5V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+2.5V
+2.5V +3.3V
+3.3V+3.3V
+3.3V +3.3V +3.3V +3.3V
+3.3V
+3.3V
GREEN-P.2BLUE+P.2BLUE-P.2
VSP.2HSP.2
RED+P.2RED-P.2
GREEN+P.2
BRT_ADJ
BL_ON
DSUB_SCLDSUB_SDALED_ORG
LED_GRN
VOL_ON/OFF
PW_SWKEY_MENU
I_KEY
KEY_DECKEY_INC
VOLUME
DCLK_TTL
DEN_TTL
DVS_TTL
OB7OB6OB5OB4OB3OB2OB1OB0
OG7OG6OG5OG4OG3OG2OG1OG0
OR7OR6OR5OR4OR3OR2OR1OR0
EB7EB6EB5EB4EB3EB2EB1EB0
EG7EG6EG5EG4EG3EG2EG1EG0
ER7ER6ER5ER4ER3ER2ER1ER0
LVDS_EN
KEY_EXITLCD_ON
DHS_TTL
Cable-Detect
RXCPP.2RXCMP.2RX2PP.2RX2MP.2RX1PP.2RX1MP.2
RX0MP.2RX0PP.2
Title
Size Document Number Rev.
Date: Sheet o f
Project Code
Reviewed By Approved ByPrepared By
Model Name
PCB P/N PCB Rev.
Benq CorporationOEM/ODM Model Name
99.L8372.000-C2-204-004
INTERFACE BOARD
3 5
JAMSON LIU DAVEN WU
48.L8301.S11 S11
ANGEL HU
<Size>
Q7T3-FP767S99.L8372.001
0
Tuesday, February 11, 2003
NA
ROM_ADDR9
Available for reading from a status register
1
ROM_ADDR7 If using 6-wire host protocol, program this bit to 1
OCM_START
GPIO(22:16) is on "Host Port" pins
x
HOST_PORT_EN
1 = All 48K of ROM is in external ROM
0
Reserved
HOST_PROTOCOL
x
ROM_ADDR8
0 = XTAL and TCLK pins are connected
1
DESCRIPTION
xROM_ADDR6
1
Available for reading from a status register
NAME
x
0
ADDRESS SET
USER_BITS(4:0)
Determines polarity of HCLK signal
OCM_ROM_CFG(1)
If using 6-wire host protocol, program this bit to 0
USER_BITS(7:5)
ROM_ADDR14
Re setCircuit
BOOTSTRAP SIGNALS
SCLPOL
ROM_ADDR13
FLASH/ Prom-Jet Socket
ROM_ADDR(4:0)
32-Pin PLCC Socket
ROM_ADDR(12:10)
ROM_ADDR5
OSC_SEL
1 = OCM becomes active after OCM_CLK is stable Close to respective power PinsClose to respective power Pins
6.1 GENERAL & REQUIREMENTS ............................................................................................................. 15 6.2 MEAN TIME TO REPAIR...................................................................................................................... 15 6.3 ACCESSIBILITY................................................................................................................................... 16
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
2
Table of Contents
6.4 EQUIPMENT & TOOLS REQUIRED....................................................................................................... 16 6.5 ELECTRICAL EMISSION AND ENERGY SAVING SUMMARY FOR TCO99............................................... 16
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
3
1. Introduction This specification describes a 17.0” color TFT LCD monitor which is supported by analog interface solution and support
maximum resolution 1280X1024 at 75Hz refresh rate. It has the following features:
- User controls:
(a) “Power on/off” switch. (b) “Menu” key: For enter sub-menus or select items. (c) " EXIT "key: back to main menus、leave OSD or enter volume hot-key function. (d) " 3 " key: For left adjustment and enter “Contrast” Hot-key function. (e) " 4 " key: For right adjustment and enter “Brightness” Hot-key function. (f) “I-Key”: For auto-adjustment picture.
- OSD window for control and information display with 8 languages selection.
- DPMS (Display Power Management System) - Power on/off indicator. - Tilt base (with tilt function from 0 to +25 degree). -DDC2B function supported.
It is composed of the following materials: -A LCD monitor
(a) Head part:
(1) A LCD module (AU M170EN05). (2) An Inverter +AC-DC board (3) An Interface board. (4) A control board. (5) A 15pin D-sub connector
(b) Base part:
(1) Tilt base. - A power cord - An user menu.
2. Operational Specification
2.1 Environment 2.1.1 Temperature
-Operating +0 to +40 degrees Celsius -Non-operating -20 to +60 degrees Celsius
2.1.2 Humidity -Operating 10 to 90% Max. Non-condensing -Non-operating 10 to 95% Max. Non-condensing
2.1.3 Altitude -Operating 0 to 3,048m (10,000ft) -Non-operating 0 to 12,192m (40,000ft)
2.2Transportation 2.2.1 Vibration Test (Package, Non-Operating)
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
4
A) Sine-wave vibration for initial resonance sweeps and dwells
* Sine sweep
Frequency (Hz) Status 5 ~ 26.6 0.6G
26.6 ~ 50 0.016" 50 ~ 500 1.5G
Sweep times: 1 sweep / Per Axis (X, Y, and Z Axis) * One major resonance dwell is required for each axis. Total dwell time at each resonance point shall be 15 minutes.
B) Random Vibration
Frequency (Hz) Slope (dB/Oct.) Spectrum Level (g2/Hz)
5 ~ 100 0 0.015
100 ~ 200 -6 ---
200 --- 0.0038
Equivalent to 1.47 G rms
* Duration: 30 Minutes / Per Axis (X, Y, and Z Axis) Total test time: 90 Minutes
2.2.2 Drop Test (Package, Non-Operating) A) Drop Height
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
5
-Corner 5-3-2 select at weakness side [the low left (or right) corner of the front panel]
-An edge drop with impact on the shortest edge radiating from corner 5-3-2 -An edge drop with impact on the next shortest edge radiating from corner 5-3-2 -An edge drop with impact on the longest edge radiating from corner 5-3-2 -A flat drop with impact on the rear -A flat drop with impact on the front -A flat drop with impact on the right -A flat drop with impact on the left -A flat drop with impact on the bottom -A flat drop with impact on the top After test, there is no electrical and mechanical damage permitted.
2.2.3 HALF-SINE SHOCK Test conditions:
Test unit: 2 sets
Each unit has to withstand 18 shocks.(3 shocks pre face)
2.4 Electrostatic Discharge Requirements The subject product must withstand 8KV for contact discharge and 15KV for air discharge of
Electrostatic Discharge and meet the acceptance criteria as specified in XXXISO 9241-3XXX -- should be IEC 801-2.
2.5 Safety Requirements The display unit complies with the following safety standards and specifications. - UL compliance.... standard for information-processing and business equipment, UL 1950. - CSA compliance...standard C22.2 No. 950-M89, data processing equipment. - TUV compliance...EN60950 safety specification-business equipment. - ISO13406-2. Ergonomic Requirements of Visual Display.
2.6 EMI Requirements 1. This display unit complies with the following EMC rules and regulations.
-FCC compliance...FCC Rule, Part 15, Subpart B, Class B. -VCCI compliance...VCCI Rule, Class-2. -CE Mark Compliance... 89/336/EEC. EN55024, EN61000-4-2/-3/-4/-5/-6/-8/-11 EN55022, Class B. EN61000-3-2, EN61000-3-3.
-DNSF compliance...EN55022, Class B. -MPR2 compliance -TCO99 -C-Tick -BSMI -EPA
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
8
2. The sample for EMI agency approval should be under 4 dB of the limit. The production pilot run units should be under 3 dB of the limit. The mass production units should be under 1 dB of the limit.
2.7 Reliability 1. The prediction MTBF of display unit shall be greater than 60,000 hours excluding the lamp. (at 25 ℃) 2. Lamp lifetime: 30,000 hrs minimum at which brightness of lamp is 50% compare to that of initial value at 7.0mA and 25℃.
2.8 Mechanical Design for TCO 99:
1) Front Frame Reflectance: * diffuse reflectance: > 20%
* Gloss <= 30% gloss unit
2) Labeling of plastics:
Plastic weight > 25g shall be marked in accordance with ISO11469
3) Variety of Plastic:
All plastic components that weight > 100g shall be made from the same type of plastic.
4) Painting of Plastic:
*Any plastic components that weight >100g shall not be painted lacquer or vanished, so that the paint, lacquer or
vanish in dry matter exceed 1 weight-% of the plastic component.
* Mould decoration (IMD) is not allowed
* All paints, lacquers, vanishes or colour additives used shall be declared by the type and mount.
5) Metallization of Plastic Housing:
* Metallization is not allowed.
6) Plastic components > 25g shall not contain retardants of organically bound chloride or bromide.
2.9 Environment Protection Design: Product is Per ES 715-c49 Environment Design Guide
2.10 Acoustical Noise With the display operating, the issue of sound measured is contained within 40 dB/A in the audible field.
3. Input / Output Signal Specification
3.1 Input Signal Requirements 3.1.1 Signal cable
(1) Analog Video Inputs:
15pin D-sub connector is on the captive signal cable for IBM VGA, compatible graphic adapters. The pin assignment of this connector is described as below:
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
9
1 5
6 10
11 15
15pin D-sub female
1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 10 SYNC GROUND 11 GROUND 12 SDA 13 H SYNC (H+V) 14 V SYNC 15 SCL
Cable length:
1600mm +/- 20mm
3.1.2 Video signals: RGB separate, Analog 0.7Vp-p/75 Ohm
This Interface board is designed to operate in any of the following video mode.
Incoming display mode(Input timing) Multi-scan
operation
Resolution Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Dot Clock
Frequency (MHz)Remark
Actual display
resolution
640x350 31.47(P) 70.08(N) 25.17 DOS 1280x943
*720x400 31.47(N) 70.08(P) 28.32 DOS
640x480 31.47(N) 60.00(N) 25.18 DOS
640x480 35.00(N) 67.00(N) 30.24 Macintosh
640x480 37.86(N) 72.80(N) 31.5 VESA
640x480 37.50(N) 75.00(N) 31.5 VESA
800x600 37.88(P) 60.32(P) 40.00 VESA
800x600 48.08(P) 72.19(P) 50.00 VESA
*800x600 46.86(P) 75.00(P) 49.50 VESA
full screen
1280x1024
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
10
832X624 49.72(N) 74.55(N) 57.29 Macintosh
*1024x768 48.36(N) 60.00(N) 65.00 VESA
1024x768 56.48(N) 70.10(N) 75.00 VESA
*1024x768 60.02(P) 75.00(P) 78.75 VESA
1024X768 60.24(N) 74.93(N) 80.00 Macintosh
1152x864 67.50(P) 75.00(P) 108.00 VESA
*1152x870 68.68(N) 75.06(N) 100.00 Macintosh
1152x900 61.80(N) 66.00(N) 94.50 SUN 66
1152x900 71.81(N) 76.14(N) 108.00 SUN
*1280x1024 64.00(P) 60.00(P) 108.00 VESA
1280x1024 75.83(N) 71.53(N) 128.00 IBM1
*1280x1024 80.00(P) 75.00(P) 135.00 VESA
*1280x1024 81.18(N) 76.16(N) 135.09 SPARC2
3.3 Number of display colors: 226K color numbers
3.4 Adjustment function Luminance:
Brightness Contrast
Geometry: H. Position V. Position
Pixel Clock Phase Color gain (Red, Green, Blue) OSD:
H. Position V. Position OSD Time
Multi-language selection Recall function: Position Recall Color Recall
Recall All Miscellaneous: Display Information. OSD Halftone
3.5 Display Power Management System (DPMS) This Interface board will automatically cut down the power of the monitor when not receiving HSYNC or VSYNC
signals over about 5 seconds, and the condition are as below,
HSYNC VSYNC LCD Module BacklightPulse Pulse On On
No pulse Pulse Off Off Pulse No pulse Off Off
No pulse No pulse Off Off
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
11
3.6 Power Supply Requirement
3.6.1 Input Power Requirements (1) Input Voltage Range
The unit shall meet all the operating requirements with an input voltage range of 90~264 Vac.
(2) Input Current
Maximum Input Current Measuring Range (MAX) 2 Arms 90Vac 〜 264Vac
(3) Frequency Range
The unit shall operate within a frequency range of 47KHz to 63KHz.
(4) Inrush Current
Power supply inrush current shall be less than the ratings of its critical components (including Power switch, fuse, rectifiers and surge limiting device) for all conditions of line voltage.
(5) Regulator Efficiency 70% minimum (measuring at 115Vac and full load)
(6) Maximum power consumption <45Watts (without Audio). Power saving mode < 3 Watts.
3.6.2 Output Power Requirements The power circuit shall supply DC power outputs as followings: Output Nominal Regulation Load Current Range
1 5V-Fix ±5% 0 ~ 0.8A 2 3.3V-Fix ±5% 0 ~ 0.8A
3.6.4 Power Management
Mode H/Vsync Power consumption LED Color (Status)
Recovery Time
Normal Both exist < 45W Green (Normal) --
Off None or Only one exist < 3W Amber 5 sec
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
12
3.7 Panel optical Characteristics Note:
Item Condition Symbol Min. Typ. Max. Unit
Contrast Ratio ψ=0°,θ=0° CR 250 450 - -
Up ψ=0° (CR>=10) θ 70 - Deg. Vertical
Down ψ=0° (CR>=10) θ 70 - Deg.
Left θ=0° (CR>=10) ψ 70 - Deg.
Viewing Angle
Horizontal Right θ=0° (CR>=10) ψ 70 - Deg.
25±2.5°C
ψ=0°,θ=0°
Tr
Tf
-
-
-
-
4
12
-
-
ms
ms
Response Time
Rise Time
Fall Time
Cross Talk ψ=0°,θ=0° Tr+Tf - - 16 ms
White Luminance Center point at
CCFL 7.0mA 260 - cd/m²
Wx 0.28 0.31 0.34
White Wy 0.30 0.33 0.36
Rx 0.61 0.64 0.67
Red Ry 0.31 0.34 0.37
Gx 0.26 0.29 0.32 Green
Gy 0.58 0.61 0.64
Bx 0.11 0.14 0.17
Chromaticity
Blue By
CIE1931
ψ=0°,θ
=0°
0.04 0.07 0.01
1. Viewing Angle, Contrast Ratio, Response Time, Reflectance, and Chromaticity are measured at panel center. 2. Viewing Angle(θ, ψ)
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
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2. Contrast Ratio (CR) is defined mathematically as:
Surface Luminance with all white pixels
Contrast Ratio = _____________________________________
Surface Luminance with all black pixels
4. Response time
TrR measures the transition time of L1 relative luminance from white to black state, from 90% to 10% (see graph below)
100% 90%
TrR TrD
WHITEBLACK
10% 0% t
WHITE
TrD measures the transition time of L1 relative luminance from black to white state, from 10% to 90% (see graph below) 5. Flicker is measured at cyan dot pattern of Forground RGB (0,0,0) and Background RGB (0,31,31).
6. The variation in surface luminance of these 9 points is defined as below:
1
2 34
5
678
9
Q7T3(AUO panel) LCD Monitor Service Guide Engineering Specification
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3.8 BACK-LIGHT UNIT The backlight system is an edge-lighting type with 4 CCFLs (Cold Cathode Fluorescent Lamp). The characters of dual lamps are shown in the following tables.
Ta=25 ± 2°C
ITEM SYMBOL MIN TYP MAX Unit Condition
Lamp Current lf 3.0 7 7.5 mA
Lamp Voltage VL 700 Vrms IL=7.0mArms
Driving Frequency 40 50 80 KHz *1
LIFE Time - 30,000 - Hour *2
IL=7.0ma Continuous Operation
- 1700 - Vrms 0°C Startup Voltage
- 1200 - Vrms 25± 2°C
*1.Lamp frequency of inverter may produce interference with horizontal synchronous frequency,and this may cause horizontal beat on the display.Therefore,please adjust lamp frequency,and keep inverter as far from module as possible or use electronic shielding between inverter and module to avoid the interference
*2. Definition of the lamp lifetime Luminance: L under 50% of specification Starting Lamp Voltage: VS < 1700V, Ta=0℃ VS < 1200V, Ta=25℃
4. Functional specification
All the tests to verify specifications in this section must be performed under the following standard conditions unless otherwise noted. The standard conditions are:
-Temperature: 5 to 40 degree Celsius -AC line input voltage: 90 Vac to 264 Vac, 47Hz or 63Hz -Warm-up time: 30 minutes minimum
4.1 Display Quality 4.1.1 Display Data Area (with full white pattern)
(1) Horizontal: 337.920 mm (2) Vertical: 270.336 mm
4.1.2 Video Performance (1) Resolution: 1280X1024 pixels Maximum (2) Contrast ratio: 250(Min.), 450(Typ.) (3) Response time: 16 ms (Typ.) (4)Viewing angle : Up/Down:70° R/L:70° (At contrast ratio >= 10) (5) CIE Coordinate: White (0.31, 0.33) +/- (0.03, 0.03) (at user mode) (6) Display color: 18 bits color
4.1.3 Light Output
Brightness rating : 260cd/㎡ (Typ.) (at user mode)
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4.1.4 Brightness Adjustment Range At contrast ratio control set at maximum level, adjusting Brightness control from minimum to maximum position, the light output of WHITE pattern shall be increased more than 40cd/㎡.
5. Physical Specifications
5.1 Physical Dimension & Appearance 5.1.1 Overall Dimensions: 375mm (W) X 370mm (H) X 155mm (D) 5.1.2 Outer Appearance: see Fig.1
5.2 Construction and Materials on outer surface (1) Materials: Plastic
5.3 Base (1)Tilt: fiest hinge:0°~ 25° , second hinge : 25 °~135°
5.5.3 Shipping Container: 2100 sets per 40 feet container with pallet.
6. Maintainability Specifications
6.1 General & Requirements 6.1.1 Installation: From outside of unit with standard tools and documentation provided to user.
6.1.2 Periodic Maintenance: No periodic maintenance is required.
6.1.3 Repair & Calibration: Require spare modules or components as specified as followings: (1) Interface board ASSY (2) AC-DC converter board ASSY (1) Control board ASSY
6.2 Mean Time to Repair 6.2.1 Module Level: Less than 10 minutes
6.2.2 Component Level: Less than 15 minutes
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6.3 Accessibility 6.3.1 General:
All panels, covers, and major assemblies are removable without disruption of permanent mounting or fasteners.
6.3.2 Outside Cabinet, access to the following elements -Operating Controls -AC Inlet -Audio in
6.3.3 Cover Removal, Access
All sub assemblies and internally adjustable components may be accessed by removing the base and the rear cover .
6.4 Equipment & Tools Required 6.4.1 Standard Test Equipment
(1) Voltmeter (2) Dual trace oscilloscope (3) Hand tools as required (4) Computer with IBM VGA, or compatible graphic adapter
6.4.2 Documentation
A service manual will be available which covers all service requirements. A users manual written in Japanese German, Italian, Spanish, France and English will be available to ship with the product.
6.5 Electrical Emission and Energy Saving summary for TCO99 6.5.1 Electrical Field(AC):
*Band I< 10V/m (132cd/m^2,”+” pattern) *Band II< 1V/m (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
6.5.2 Magnetic Field(AC): *Band I< 200nt (132cd/m^2,”+” pattern) *Band II< 32nt (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
ITEM State Power OFF Brightness 90 Contrast 50 OSD- Timeout 20s OSD-Language English OSD-Image size Full Screen
OSD-Color temp CU MODE
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Fig. 1 Physical Dimension Front View and Side view
� Product System (PS)
Subject: ASS'Y DRAWING-Q7T3(767S) Part No.: 99.L8372.000 Rev.: 0
Doc. No. 99.L8372.000-C3-328-001
Project Code: 99.L8372.001 Component Part. No.: Page 1 of 1
Model Name: Q7T3
Form No: ACM0-0B-003-24(010918)
1
Release Notice
Q7T3(AUO Panel) LCD Monitor Service Guide Alignment Procedure
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1.Alignment procedure (for function adjustment)
A. Preparation: 1. Setup input timing VGA_60Hz, Cross-Hatch (General-1) pattern. 2. The monitor power on at first time that will enter Factory OSD mode. (If not, Please press “Menu” and “Exit” plus
“Power” buttons at the same time. A “Factory” word will be showed on the upper left hand side of OSD Main menu.) Burn in mode have already started. (See Fig 1.). If it hasn’t started, Please choose “BURN IN MODE” tag and select “On” to enable burn-in mode.
3. Setup unit and keep it warm up at least 30 minutes
B. Timing adjustment:
1. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the same time to enter factory mode.).
2. Burn-In Mode “off”. See Fig 2. 3. Select timing from Table 1. The timing marked with star sign (*) have to be adjusted. 4. Execute “Recall All” (press “Yes”) to clear user area in EEPROM 5. The cursor moves to “AUTO Adjust ” or press “I-Key” to run “AUTO adjustment” function. 6. Check the phase of the image; if phase is not perfect adjust it to the best condition. 7. Adjust the settings to following values:
CONTRAST = 50 BRIGHTNESS = 90 OSD TIME = 20 COLOR = sRGB
8. When Factory mode is disable (burn-in mode “off”) then power off after power on will enter user mode.
C. Color balance adjustment: 1. Setup input timing VGA_60Hz, cross-hatch (General-1) pattern. 2. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the
same time to enter factory mode.). 3. Setup the “Burn-in mode” is “On” 4. Select the color to user-preset mode. 5. At Main menu move cursor to “AUTO Adjust ” tag then press the “ENTER” or “I-Key” to run “AUTO Color
balance” function. 6. Checking if the picture is no good, reject this monitor.
D. Color adjustment: 1. Setup input timing VGA_60Hz, cross-hatch (General-1) pattern. 2. Enter factory setting area (if it isn’t at factory mode, Please press “Menu” and “Exit” plus “Power” buttons at the
same time to enter factory mode.).
3. Move cursor into “BUR-IN MODE” tag and select “On” to enable burn-in mode. (If it wants to do “Auto Color balance”, please select the color to user-preset mode.)
4. Measure color temperature by Minolta CA-110 (or equivalent equipment). 5. The monitor has already set default value to monitor (just for 56.91L53.001)
If it can’t meet color temperature spec. upper default value. Please use Auto Alignment to calibrate the color temperature; Bluish, & Reddish and sRGB. The color temperature specification as follows:
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X+- 0.326+(-) 0.03White Balance
(Reddish, 5800K set on OSD) Y+- 0.342+(-) 0.03220 cd/㎡
X+- 0.313+(-) 0.03White Balance
(sRGB, 6500K set on OSD) Y+- 0.329+(-) 0.03220 cd/㎡
X+- 0.283+(-) 0.03White Balance
(Bluish, 9300K set on OSD) Y+- 0.297+(-) 0.03190 cd/㎡
6. Move cursor into “BURN IN MODE” tag and select “Off” to disable burn-in mode. 7. Turns off the monitor power.
E. Writing EDID file : 1. Setup a PC with DDC card.
2. Connect PC to monitor with a D-sub signal cable.
3. Please refer to the C212 for the correct EDID file.
4. Runs the writing program to write the EDID file into EEPROM for analog input, ie. 15-pin D-sub.
5. Read both EEPROM data and confirm it to match with the C212 definition.
F. Command definition:
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command Byte1 Byte2 Byte3 Byte4
Write Contrast CA 55 Data checksum
Write Brightness CA 56 Data checksum
Write Red Gain CA 57 Data checksum
Write Green Gain CA 58 Data checksum
Write Blue Gain CA 59 Data checksum
Read Contrast C3 55 XX checksum
Read Brightness C3 56 XX checksum
Read Red Gain C3 57 XX checksum
Read Green Gain C3 58 XX checksum
Read Blue Gain C3 59 XX checksum
Write Bluish(9300K) R-Gain Data to NVRAM AA 3C Data checksum
Write Bluish(9300K) G-Gain Data to NVRAM AA 3D Data checksum
Write Bluish(9300K) B-Gain Data to NVRAM AA 3E Data checksum
Write sRGB(6500K) R-Gain Data to NVRAM AA 4C Data checksum
Write sRGB(6500K) G-Gain Data to NVRAM AA 4D Data checksum
Write sRGB(6500K) B-Gain Data to NVRAM AA 4E Data checksum
Write Reddish(5800K) R-Gain Data to NVRAM AA 5C Data checksum
Write Reddish(5800K) G-Gain Data to NVRAM AA 5D Data checksum
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Write Reddish(5800K) B-Gain Data to NVRAM AA 5E Data checksum
Write User R-Gain Data to NVRAM AA 6C Data checksum
Write User G-Gain Data to NVRAM AA 6D Data checksum
Write User B-Gain Data to NVRAM AA 6E Data checksum
Read Bluish(9300K) R-Gain data from NVRAM A3 3C XX checksum
Read Bluish(9300K) G-Gain data from NVRAM A3 3D XX checksum
Read Bluish(9300K) B-Gain data from NVRAM A3 3E XX checksum
Read sRGB(6500K) R-Gain data from NVRAM A3 4C XX checksum
Read sRGB(6500K) G-Gain data from NVRAM A3 4D XX checksum
Read sRGB(6500K) B-Gain data from NVRAM A3 4E XX checksum
Read Reddish(5800K) R-Gain data from NVRAM A3 5C XX checksum
Read Reddish(5800K) G-Gain data from NVRAM A3 5D XX checksum
Read Reddish(5800K) B-Gain data from NVRAM A3 5E XX checksum
Read User R-Gain data from NVRAM A3 6C XX checksum
Read User G-Gain data from NVRAM A3 6D XX checksum
Read User B-Gain data from NVRAM A3 6E XX checksum
Change Color Temperature to Bluish CC 1 XX checksum
Change Color Temperature to sRGB CC 2 XX checksum
Change Color Temperature to Reddish CC 3 XX checksum
Change C/T to User CC 4 XX checksum
User mode to factory mode 1A 5A XX checksum
Auto Color (Offset1, Offset2, Gain) 1B 5A XX checksum
Factory mode to User mode 1E 5A XX checksum
Clear user area data 1F 5A XX checksum
Off burn in mode CE 2 XX checksum
Change Language Setting 66 0~7 XX checksum
Note A: Byte4(Checksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU
Note C: XX = don't care, any value(<=0xFF).
Note D: The Byte-2 definition of “Change Language Setting” is as below,
0=DE, 1=EN, 2=ES, 3=FR, 4=IT, 5=JA, 6=繁中, 7=簡中
When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes)
Return Code R-Byte1 R-Byte2
Checksum error code FC AA
Normal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF
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The Table is for alignment machine to read data from EEPROM to check if the alignment process and write data are correct.
Read EEPROM Contrast A3 92 XX checksum
Read EEPROM Brightness A3 93 XX checksum
Read EEPROM C/T Point A3 94 XX checksum
Read EEPROM OSD-Hpos A3 95 XX checksum
Read EEPROM OSD-Vpos A3 96 XX checksum
Read EEPROM Language A3 97 XX checksum
Read EEPROM OSD Timer A3 98 XX checksum
Read EEPROM Volume A3 99 XX checksum
Table 1.
Incoming display mode (Input timing) Multi-scan
operation
Resolution Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Dot Clock
Frequency (MHz)Remark
Actual display
resolution
*720x400 31.47(N) 70.08(P) 28.32 DOS
*640x480 31.47(N) 60.00(N) 25.18 DOS
*640x480 37.50(N) 75.00(N) 31.5 VESA
*800x600 37.88(P) 60.31(P) 40.00 VESA
*800x600 46.87(P) 75.00(P) 49.5 VESA
*1024x768 48.36(N) 60.00(N) 65.00 VESA
*1024x768 60.02(P) 75.00(P) 78.75 VESA *1152x864 67.50(P) 75.00(P) 108.00 VESA
*1280x1024 64.00(P) 60.00(P) 108.00 VESA
*1280x1024 80.00(P) 75.00(P) 135.00 VESA
Full Screen
1024x768
Table 2
Fig 1. Burn-In Mode “On”
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Fig 2. Burn-In Mode “Off” 2.Wire Dressing
a. LVDS Cable with clip
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b. LVDS Cable with tape
c. Lamp wire with clip
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d. Add 4 Pcs crew to BKT between panel grounding
e. Al-Foil-Mylar on the shielding cover
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f. Spacer
g. Signal cable with clip
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h. Bracket Cover
i. Plug under AC socket
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j. Main Grounding Wire
k. Control BD wire: conductive tape change to Clip
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l. Shielding cover: conductive tape
m. Bracket with panel grounding spring
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n. Ctrl BD with panel grounding spring
3. Add Glue a. C605
Q7T3(AUO Panel) LCD Monitor Service Guide Alignment Procedure
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b. C603, C604, L606, L607
c. C615
Q7T3-FP737S Dual function LCD Monitor Service Guide Trouble Shooting
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Q7T3_LS(FP731-DVI) TROUBLE SHOOTING GUIDE
No Display or display is unstable: 1.1 Interface Board:
No picture or picture unstable
Power off Yes Turn on power
No
Does cable plugs in No Check all of wire then turn on power
connector? switch again.
Yes
Does power stable? No Check Power BD
Yes
Is LED light green/orange? No Check control BD
Yes
Is LED status normal? No Check MCU(U4) or replace it
Yes
Does crystal work correctly? No Check crystal Y2 CKT or replace it
Yes
Is interface BD normally? No Replace interface BD
Yes
Replace panel
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2. BUTTON function: 2.1 Control Board OSD is not working Yes
Is control BD connecting? No Plug control BD then retry
Yes
Is bottom switch normally? Yes Replace control BD then retry
No
Replace Control BD
Is OSD working??
No
Check Interface BD
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3. OSD function:
OSD doesn’t work
Is control BD working? No Replace control BD
Check interface BD
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4. Power Board
Backlight didn't shine
LED shined?
3.3V existed? IS I/F board connected?
IC751 PIN 9 IS 14-16V?
Check IC751
PWM existed?(BLT_ADJ)
Plug CN701 again orchecking I/F BD
Turn on level existed?(BLT_ON)
Insert them againCheck CN752, CN753was pluged properly?
Plug CN601 again orchecking PW BD
Replace IC751,Q751
Replace new fuse
Replace new fuse
Check IC701 OK?
Checking F601Broke?
Check IC601 Vccexisted?
Replace IC602,IC702,D701 or check
I/F BD
Replace IC701
Replace new fuse
ReplaceIC601,Q602,Q603
R602
Y
N
N
N
N
Y
Y
Y
Y
N
Y
Y N
N
Y
Y
Y
N
N
N
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5. DVI_BD DVI No picture or picture unstable
Power off Yes Turn on power
No
Does cable plugs in No Check all of wire then turn on power
connector? switch again.
Yes
Does power stable? No Check Power BD
Yes
Is LED light green/orange? No Check control BD
Yes
Is LED status normal? No Check MCU(U4) or replace it
Yes
Does crystal work correctly? No Check crystal Y2 CKT or replace it
3. Input / Output Signal Specification .......................................................................................10
3.1 Input Signal Requirements .........................................................................................................10 3.1.1 Signal cable (Directly attached to unit)........................................................................................................10 3.1.2 Video signals: ..................................................................................................................................................11 3.1.3 Sync signal: ......................................................................................................................................................11
3.2 Function ........................................................................................................................................11 3.2.1 Support timing .................................................................................................................................................11
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Table of Contents
3.3 Number of display colors: ...........................................................................................................13
3.4 Adjustment function ....................................................................................................................13
3.5 Power Supply Requirements.......................................................................................................13 3.5.1 Input Power Requirements.............................................................................................................................13 3.5.2 Output Power Requirement............................................................................................................................14 3.5.3 Power Management.........................................................................................................................................14
3.6 Specification of Inverter...........................................................................................................14
4.1 Display Quality.............................................................................................................................17 4.1.1 Display Data Area (with full white pattern) ................................................................................................17 4.1.2 Video Performance..........................................................................................................................................18 4.1.3 Light Output.....................................................................................................................................................18 4.1.4 Brightness Adjustment Range .......................................................................................................................18
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Table of Contents
6.2 Mean Time to Repair...................................................................................................................19 6.2.1 Module Level:..................................................................................................................................................19 6.2.2 Component Level: ...........................................................................................................................................19
6.3 Accessibility ..................................................................................................................................19 6.3.1 General:.............................................................................................................................................................19 6.3.2 Outside Cabinet, access to the following elements ....................................................................................19 6.3.3 Cover Removal, Access..................................................................................................................................19
6.4 Equipment & Tools Required.....................................................................................................19 6.4.1 Standard Test Equipment ...............................................................................................................................19 6.4.2 Documentation.................................................................................................................................................19
6.5 Electrical Emission and Energy Saving summary for TCO 03 ...............................................19 6.5.1 Electrical Field(AC):.......................................................................................................................................19 6.5.2 Magnetic Field(AC):.......................................................................................................................................19 6.5.3 Energy Saving: ................................................................................................................................................19
Fig. 1 Physical Dimension Front View and Side view .................................................................20
Q7T3-FP737S-Dual function LCD Monitor Service Engineering Specification
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1. Introduction This specification describes a 17.0” color TFT LCD monitor which is supported by dual(analog and DVI) interface
solution and support maximum resolution 1280x1024 at 76 Hz refresh rate. No speakers are expected. Besides, tilt and wall mount function are equipped. It has the following features:
- User controls:
(a) “Power on/off” switch.
(b) “Exit” key( Back to main menus or leave OSD menu and hot key of Input selection).
(c) “I-key”( For auto adjust vertical position, phase, horizontal position and pixel clock ).
(d) “Enter” key(For enter sub-menus or select items.).
(e) “Left” key (Select left, decreasing adjust and hot key of Contrast adjustment).
(f) “Right” key (Select right, increasing adjust and hot key of Brightness adjustment).
- OSD window for control and information display with 8 languages selection.
- DPMS (Display Power Management System)
- Power on/off indicator.
- High quality advanced zoom function (Scaling function)
- Tilt base : Attached base with 0~25 degree tilt.
-DDC2B function supported.
- A LCD monitor
(a)Head part:
(1) A LCD module(LG M170E01-A5NC).
(2) An AC power and inverter board.
(3) An Interface board.
(4) A control board.
(5) A signal cable with 15pin D-sub and 24 pin DVI connector .
(b) Base part:
(1) Tilt base.
(2) Foldable
- A power cord
- An user menu.
-Setup disk. (including .INF/.ICM/Test pattern) --all INF/ICM/Test pattern are loaded in CD manual + Quick
start guide
2. Operational Specification 2.1 Environment
2.1.1 Temperature
-Operating 0 to 40 oC -Storage -20 to 60 oC
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2.1.2 Relative Humidity
-Operating 10 to 90% Max. ( non-condensing) -Storage 5 to 95% Max. ( non-condensing)
2.1.3 Altitude
-Operating 0 to 3,048m (12,000ft) -Storage 0 to 12,192m (40,000ft)
2.2 Transportation
2.2.1 Vibration Test (Package, Non-Operating)
A) Sine-wave vibration for initial resonance sweeps and dwell * Sine sweep
Frequency (Hz) Status 5 ~ 26.6 0.6G
26.6 ~ 50 0.016" 50 ~ 500 1.5G
Sweep times: 1 sweep / Per Axis (X,Y, and Z Axis ) * One major resonance dwell is required for each axis. Total dwell time at each resonance point shall be 15 minutes.
B) Random Vibration
Frequency (Hz) Slope ( dB/Oct.) Spectrum Level (g2/Hz)
5 ~ 100 0 0.015
100 ~ 200 -6 ---
200 --- 0.0038
Equivalent to 1.47 G rms
* Duration: 30 Minutes / Per Axis (X,Y, and Z Axis ) Total test time : 90 Minutes
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Pallet B: 84 Pallet B: 14
2.4 Electrostatic Discharge Requirements The subject product must withstand 8 KV for contact discharge and 15 KV for air discharge of
Electrostatic Discharge and meet the acceptance criteria as specified IEC 801-2 .
2.5 Safety Requirements The display unit complies with the following safety standards and specifications. -UL compliance....standard for information-processing and business equipment, UL 1950. -CSA compliance...standard C22.2 No. 950-M89, data processing equipment. -TUV compliance...EN60950 safety specification-business equipment. -ISO13406-2 .Ergonomic Requirements of Visual Display. -Demko...EN60950. -Nemko...EN60950. -Semko...EN60950. -Fimko...EN60950.
2.6 EMI Requirements 1. This display unit complies with the following EMC rules and regulations.
-FCC compliance...FCC Rule, Part 15, Subpart B, Class B. -VCCI compliance...VCCI Rule, Class-2. -CE Mark Compliance... 89/336/EEC. EN55024, EN61000-4-2/-3/-4/-5/-6/-8/-11
EN55022, Class B. EN61000-3-2,EN61000-3-3.
-DNSF compliance...EN55022, Class B. -MPR2 compliance - TCO99 -C-Tick -BSMI -EPA
2. The sample for EMI agency approval should be under 4 dB of the limit. The production pilot run units should be under 3 dB of the limit. The mass production units should be under 1 dB of the limit.
2.7 Reliability 1. The prediction MTBF of display unit shall be greater than 60,000 hours excluding the lamp.(at 25 ℃) 2. Lamp life time : 40,000 hrs typical at which brightness of lamp is 50% compare to that of initial value at 7.0mA and 25℃.
2.8 Mechanical Design for TCO 03: 1) Front Frame Reflectance:
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Plastic weight > 25g shall be marked in accordance with ISO11469
3) Variety of Plastic:
Type of plastic material is synonymous with the term basic polymer used in ISO1043-1. For blends of plastics e.g.
PC+ABS, all weight ratios are considered to be the same type of material.
4) Painting of Plastic:
Plastic materials weighing more than 25 grams included in the VDU. Different kinds of adapters are defined as
parts of
VDU. Printed wiring board laminates and the flat panel itself are excluded.
5) Metallization of Plastic Housing:
* Metallized name-plates and control knobs are accepted.
6) Plastic components > 25g shall not contain retardants of organically bound chloride or bromide.
2.9 Environment Protection Design: Product is Per ES 715-c49 Environment Design Guide
2.10 Acoustical Noise
With the display operating, the issue of sound measured is contained within 40 dB/A in the audible field. 3. Input / Output Signal Specification
3.1 Input Signal Requirements 3.1.1 Signal cable (Directly attached to unit)
3.1.1.1 Video Inputs:
(1) DSUB –digital Signal Inputs 15pin D-sub connector is on the captive signal cable for IBM VGA, compatible graphic adapters.
The pin assignment of this connector is described as below:
15
610
1115 15pin D-sub female
1 RED VIDEO 2 GREEN VIDEO 3 BLUE VIDEO 4 GROUND 5 Cable Detect 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V 10 SYNC GROUND 11 GROUND 12 SDA 13 H SYNC (H+V)
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14 V SYNC 15 SCL
(2) DVI (digital signal input)
24 pins DVI connector is designed to match with DVI-digital signal cable. The pin assignment of this connector is as the following:
Resolution Horizontal Vertical Dot Clock Remark Actual display resolution
640x350 31.47(P) 70.08(N) 25.17 DOS 1280x943
720x400 31.47(N) 70.08(P) 28.32 DOS full screen
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640x480 31.47(N) 60.00(N) 25.18 DOS
640x480 35.00(N) 67.00(N) 30.24 Macintosh
640x480 37.86(N) 72.80(N) 31.5 VESA
640x480 37.50(N) 75.00(N) 31.5 VESA
800x600 37.88(P) 60.32(P) 40.00 VESA
800x600 48.08(P) 72.19(P) 50.00 VESA
800x600 46.86(P) 75.00(P) 49.50 VESA
832X624 49.72(N) 74.55(N) 57.29 Macintosh
1024x768 48.36(N) 60.00(N) 65.00 VESA
1024x768 56.48(N) 70.10(N) 75.00 VESA
1024x768 60.02(P) 75.00(P) 78.75 VESA
1024X768 60.24(N) 74.93(N) 80.00 Macintosh
1152x864 67.50(P) 75.00(P) 108.00 VESA
1152x870 68.68(N) 75.06(N) 100.00 Macintosh
1152x900 61.80(N) 66.00(N) 94.50 SUN 66
1152x900 71.81(N) 76.14(N) 108.00 SUN
1280x1024 64.00(P) 60.00(P) 108.00 VESA
1280x1024 75.83(N) 71.53(N) 128.00 IBM1
1280x1024 80.00(P) 75.00(P) 135.00 VESA
1280x1024 81.18(N) 76.16(N) 135.09 SPARC2
1280x1024
Notes:
(1) If the incoming display mode is not supported by this I/F board listed above, the picture can show up or
doesn’t which is unpredictable, even the picture can display but probably isn’t good or clear.
(2) Some signals from graphics board may not function properly.
(3) “P”, “N” stands for “Positive”, “Negative” polarity of incoming HSYNC/VSYNC(input timing).
(4) OSD will show “No Signal” message on the screen as below to indicate it while no display mode inputs.
(5) OSD will show “No Cable Connection” message on the screen as below to indicate it while no cable
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plug in PC.
(6) OSD will show “Out of Range” message on the screen to indicate it while input display mode meet the
following condition
(a) The resolution is large than 1280x1024.
(b) The resolution is 1280x1024 but it frequency of vertical sync (Fv) is large than 77Hz.
(c) The frequency of horizontal sync (Fh) is large than 83KHz.
(d) The frequency of vertical sync (Fv) is large than 76Hz.
3.3 Number of display colors: 262k color numbers
3.4 Adjustment function Brightness
Contrast
Display position (Vertical , Horizontal)
Phase
Pixel clock
Color gain(Red, Green, Blue)
OSD position (Vertical , Horizontal)
Multi-language selection OSD time Input selection(analog/DVI)
Recall function(Color Recall、Recall All)
3.5 Power Supply Requirements
3.5.1 Input Power Requirements
(1) Input Voltage Range
The unit shall meet all the operating requirements with an input voltage range of 90~264 Vac . (2) Input Current
Maximum Input Current Measuring Range (MAX) 2 Arms 90Vac ∼ 264Vac
(3) Frequency Range
The unit shall operate within a frequency range of 47Hz to 63Hz.
(4) Inrush Current
Power supply inrush current shall be less than the ratings of its critical components (including Power switch, fuse, rectifiers and surge limiting device) for all conditions of line voltage.
(5) Regulator Efficiency
70% minimum (measuring at 115Vac and full load) Power saving mode < 1 Watts at 115vac
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3.5.2 Output Power Requirement
The power circuit shall supply DC power outputs as followings: Output Nominal Regulation Load Current Range
1 5V-panel ±10% 0 ~ 1.0A
2 3.3V-Fix ±5% 0 ~ 1.0A 3.5.3 Power Management
Mode H/Vsync Power consumption LED Color (Status)
Recovery Time
Normal Both exist < 40W Blue (Normal) --
off None or Only one exist
< 1W, under 115Vac < 2W, under 264Vac
Amber < 3 sec
3.6 Specification of Inverter The backlight system is an edge-lighting type with 4 CCFLs (Cold Cathode Fluorescent Tube).
The characters of dual lamps are shown in the following tables.
ITEM SYMBOL MIN TYP MAX Unit Condition Lamp Voltage VL -- 650 -- V IL=6.5 mA
Lamp Current IL 2.5 6.5 7 mA Each Lamp Inverter Frequency FL 40 60 70 kHz
1250 -- -- V Tb=0 oC Starting lamp voltage VS
1000 -- -- V Ta=25oC
Lamp life time LT 50,000 -- -- Hr Ta=25±2 oC
NOTE: 1.All condition are at 25C ambient unless otherwise specified.
2. Load Panel=SXGA 17”
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3.7 Panel optical Characteristics Item Unit Conditions Min. Typ. Max.
Horizontal (Right) CR = 10 (Left) 60
60
70 70 -
Vertical (Up) CR = 10 (Down) 60
60
70 70 -
Horizontal (Right) CR = 5 (Left) 70
70
80 80 -
-
Viewing Angle [degree]
Vertical (Up) CR = 5 (Down) 70
70
80 80 -
- Contrast ratio Normal Direction 300 450 -
Raising Time - 4 5 Falling Time - 12 20 Response Time (Note 1)
[msec] Raising + Falling - 16 25
Red x 0.61 0.641 0.67 Red y 0.31 0.342 0.37
Green x 0.26 0.292 0.32 Green y 0.58 0.611 0.64 Blue x 0.11 0.147 0.17
Color / Chromaticity Coordinates (CIE)
Blue y 0.04 0.068 0.10 White x 0.28 0.313 0.34
Color Coordinates (CIE) White White y 0.30 0.329 0.36
1. Viewing Angle, Contrast Ratio, Response Time, Reflectance, and Chromaticity are measured at panel center. 2. Viewing Angle(θ, ψ)
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See figure below
Measurement is done on position 1. Viewing angle origine is the axis normal to the flat panel. Left (L) and Right (R) valueare the maximum angles for which CR=10. Up (U) and (D) value are the maximumangles for which CR=10.
Normal Ey �
Ö� xÖ = 0 , Right
Ö = 90 , Up
Ö = 180 , Left
Ö = 270 , Down
3.Contrast Ratio (CR) is defined mathematically as:
)0φ ,0θ(at
(Min.) el Black Levin Luminance
(Max.) LevelWhite in Luminance
oo ==
4. Response time
TrR measures the transition time of L1 relative luminance from white to black state, from 90% to 10% (see graph
below)
TrD measures the transition time of L1 relative luminance from black to white state, from 10% to 90% (see graph
below)
5. Cross talk shall be measured between two patterns.
100% 90%
TrR TrD
WHITEBLACK
10% 0% t
WHITE
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FULL WHITE
184 gray level
0 gray level
1/2 1/6 2/3 1/61/2 1/3
1/6
1/31/2
2/3
A A'
B B'
184 gray level
l LA-LA’ l / LA x 100%= 1.2% max., LA and LB are brightness at location A and B l LB-LB’ l / LB x 100%= 1.2% max., LA’ and LB’ are brightness at location A’ and B’
LA:Luminance of measured point in A (cd/m2) LB:Luminance of measured point in B (cd/m2) LA’:Luminance of measured point in A’ (cd/m2) LB’:Luminance of measured point in B’ (cd/m2)
(at Viewing Angle o0φ0θ
o == , )
6. Brightness Uniformity of these 9 points is defined as below:
5
110%
90%
50%
90% 10%50%
2
4
3
6
7 8 9
Brightness Uniformity = Min. brightness / Max. brightness x 100 % > 70%
4. Functional specification All the tests to verify specifications in this section must be performed under the following standard conditions
unless otherwise noted. The standard conditions are:
-Temperature : 0 to 40 degree Celsius
-AC line input voltage : 90 Vac to 264 Vac, 47Hz or 63Hz
-Warm-up time : 30 minutes minimum
4.1 Display Quality
4.1.1 Display Data Area (with full white pattern)
(1) Horizontal: 337.920 mm
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(2) Vertical: 270.336 mm 4.1.2 Video Performance
(1) Resolution : 1280 X 1024 pixels Maximum (2) Contrast ratio : 250(Min.), 500(Typ.) (3) Response time : 16 mS(Typ.) (4)Viewing angle : Up:70° Down:70° R/L:70° (At contrast ratio >= 10) (5)CIE Coordinate: White ( 0.31, 0.33 ) +/- (0.03, 0.03) (at user mode)
(6) Display color: 262k bits color 4.1.3 Light Output
Brightness rating : 260cd/㎡(Typ.) @7.0mA
4.1.4 Brightness Adjustment Range
At contrast ratio control set at maximum level, adjusting Brightness control from minimum to maximum
position, the light output of WHITE pattern shall be increased more than 40cd/㎡.
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6. Maintainability Specifications 6.1 General & Requirements
6.1.1 Installation:
From outside of unit with standard tools and documentation provided to user. 6.1.2 Periodic Maintenance:
No periodic maintenance is required. 6.1.3 Repair & Calibration:
Require spare modules or components as specified as followings: (1) Interface board ASSY (3) AC-DC converter board ASSY (4) Control board ASSY
6.2 Mean Time to Repair
6.2.1 Module Level:
Less than 10 minutes 6.2.2 Component Level:
Less than 15 minutes 6.3 Accessibility
6.3.1 General:
All panels, covers, and major assemblies are removable without disruption of permanent mounting or fasteners.
6.3.2 Outside Cabinet, access to the following elements
-Operating Controls -AC Inlet
6.3.3 Cover Removal, Access All sub assemblies and internally adjustable components may be accessed by removing the base and the rear cover .
6.4 Equipment & Tools Required 6.4.1 Standard Test Equipment
(1) Voltmeter (2) Dual trace oscilloscope (3) Hand tools as required (4) Computer with IBM VGA , or compatible graphic adapter
6.4.2 Documentation A service manual will be available which covers all service requirements. A users manual written
in Japanese German, Italian, Spanish, France and English will be available to ship with the product. 6.5 Electrical Emission and Energy Saving summary for TCO03
6.5.1 Electrical Field(AC): *Band I< 10V/m (132cd/m^2,”+” pattern) *Band II< 1V/m (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
6.5.2 Magnetic Field(AC): *Band I< 200nt (132cd/m^2,”+” pattern) *Band II< 32nt (132cd/m^2,”+” pattern) Note: Shielded power cord is not acceptable
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Appendix 1 – Shipment Conditions
ITEM State Power ON Brightness 90 Contrast 50 OSD- Timeout 20s OSD-Language English OSD-Image size Full Screen
OSD-Color temp SRGB MODE
Fig. 1 Physical Dimension Front View and Side view
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I. Introduction: The Q7T3-FP731-D is a 17” SXGA (1280x1024) , 262 K colors(R, G, B 6-bit data) TFT LCD
monitor with multi-media function. It’s an Dual (analog and digital) interface LCD monitor with a 15 pins D-sub signal cable and a 24pins DVI-D cable . it’s compliant with VESA specification to offer a smart power management and power saving function. It also offers OSD menu for users to control the adjustable items and get some information about this monitor, and the best function is to offer users an easy method to set all adjustable items well just by pressing one key, we called it “Auto key” which can auto adjusting all controlled items. Q7T3-FP731-D also offer DDC2 function to meet VESA standard.
II. Block diagram
The Q7T3-FP731-D consists of a head and a stand (base). The head consists of a LCD module with 4 lamps, a power board (include AC/DC, DC/DC and inverter board), a control board and interface BD. The block diagram is shown as below.
III. Circuit operation theory: A.) HEAD:
A-1.) Interface board diagram:
Control board
Interface board
LCD module with 4 lamps (backlight)
AC power in
D-Sub DVI-D
Inverter
Power
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Mst 8131B
140MHz Single Link
TMDS
MTV312M64(AJ)
Clock
Generator
XGA
1280×1024 LCM
DVI-D
D-SUB
Keypad IIC
140MHz ADC
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(a) Circuit operation theory: A basic operation theory for the interface board is to convert input signal into digital RGB . Analog RGB signal is converted to digital signal through ADC. DVI-D signal is converted through TMDS receiver. The microprocessor Mst8131B receives video data and optimizes the image automatically. It also supports input source selection, 16 color from a 64k palette bitmap OSD, and keypad con t ro l l ing . The ou tpu t da ta a re sen t to LCD module .
(b) IC introduction: 1.) DDC (Display Data Channel) function: We use DDC IC to support DDC/2B function. DDC data is
stored in 24C04(EEPROM). Those data related to LCD monitor specification. PC can read them by “SDA” and “SCL” serial communication for I2C communication for DDC2B.
2.) Mst8131B IC: There are A/D, Scaling, OSD, MCU functions in the Mst8131B IC. Scaling IC is revolutionary scaling engine, capable of expanding any source resolution to a highly uniform and sharp image, combined with the critically proven integrated 8 bit triple-ADC and patented Rapid-lock digital clock recovery system. It also support detect mode and DPMS control. MCU control unit, it controls all the functions of this interface board, just like the OSD display setting, the adjustable items, adjusted data storage, the external IIC communication, support DDC2B.
3.) EEPROM: We use 24C04 to store all the adjustable data and user settings. And use 24C02 to store DVI EDID data. 4.) MTV312M64: To stored the source code which is accessed by MCU to run program.
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A-2.) Power board diagram:
Fig.1
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC, VDE, VCCI standard requirements.
Fig. 2
EMI Filter Rectifier and
filter
Isolation power
transformer
Rectifier and filter Audio Amp and
Pre-Amp
PWM controller Switching element
Feedback Isolation
Inverter circuit
Rectifier and filter
LDO regulator
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#2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the DC Output voltage is 1.4*(AC input). (See Fig.3)
Fig. 3
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#3 Switching element and Isolation power transformer When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the stored
energy is delivered to the secondary of transformer. R607, C607 and D601 is a snubber circuit. R615 is current sense resistor to control output power. (See Fig.4)
Fig. 4
#4 Rectifier and filter D701 and C703 are to produce DC output. L701 and C704 are to suppress high Frequency switching spikes. (See Fig.5)
Fig. 5
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#5 PWM Controller The PWM controller NCP1200A implements a standard current mode architecture. With an internal structure
operating at a fixed 40KHz. Where the switch time is dictated by the peak current set-point. When the current set-point falls below a given value. The output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency.
Fig. 6
#6 Feedback circuit PC123 is a photo-coupler and TL431 is a shunt regulation. They are used to detect the output voltage
change and be the primary and secondary isolation. When output voltage changes, the feedback voltage will be compared and duty cycle will be decided to control the correct output voltage. (See Fig.7)
Fig. 7
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A-3.) Control board introduction: The main parts of the control board are a push button, and a LED.
(a) Push button: It’s a simple switch function, pressing it for “ON” to do the auto adjustment function, releasing it for “OFF” to do nothing. (c) LED: It indicates the DPMS status of this LCD monitor; green light means DPMS on (Normal operating condition). Amber light means DPMS off (Power off condition).
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A-4.) Inverter diagram:
1.Block Diagram:
2. General Specification
Input Voltage: 15V
Input Current: 2A max.
ON/OFF Voltage: 3.3V
PWM Duty: 3.3V/47KHz
Output Requirement:
Max. Output Current: 15mA
Min. Output Current: 6mA
Lamp Working Voltage: 600Vrms
Open Lamp Voltage: 1700Vrms
Frequency: 50KHz
15Vin ON/OFF
switching
OSCILATOR
CIRCUIT
TRANSFORMER CCFL
PWM CONTROLLER
TL1451 CIRCUIT PROTECTION
AND DETECT
ON/OFF
BRT_ADJ
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3.Circuit Operation Theorem
3.1 ON/OFF SWITCH
The turn-on voltage was controlled by R756 and R757.The inverter was turned on or off by the switching transistors
Q761 and Q757, Also regulator IC751 is control by Q761 and Q757 decide supply 15V to inverter part or instead.
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3.2 PWM Control circuit
TL1451 is a dual PWM controller.C765 and R765 decide the working frequency.BLT_ADJ signal is from control board,
control pulse width then decide how much energy delivery to CCFL also decide CCFL brightness. Q741 and Q742 be
the buffer to rise the drive capability and the totem poles circuit can improve a capable of driving for Q743.C770 decide
the striking time delay.
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3.3 Oscillator Circuit
Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power inject, Q759 or Q760 will turns on, and the current Ic increases. After a period, the transistor will leave the saturation status and Vce increase. The result causes the voltage of primary coil get lower. Finally the transistor turn off, and another transistor turn on. These statuses are repeated and the pin7 and pin8 of T751 will get a Sin Wave to turn on CCFL.