COLOR MONITOR SERVICE MANUAL Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS NO. : CL-32 MODEL: L1510S (L1510SL-AL**R) *( ) **Same model for Service *To apply the Mstar Chip.
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CAUTIONBEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : CL-32
MODEL: L1510S (L1510SL-AL**R)*( ) **Same model for Service
*To apply the Mstar Chip.
CONTENTS
SPECIFICATIONS
- 2 -
1. LCD CHARACTERISTICSType : TFT XGA LCD ModuleSize : 352.0(H) x 263.5(V) x 14.0(T)Pixel Pitch : 0.297mm x 0.297mmColor Depth : 6bits(with FRC)/ 16M colors Active Video Area : 15.0inch
(304.128 x 228.096)Surface Treatment : Anti-Glare, Hard Coating (3H)Backlight Unit : Top/Bottom edge side 2CCFLElectrical Interface : LVDS interface
2. OPTICAL CHARACTERISTICS2-1. Viewing Angle by Contrast Ratio ≥ 10
Left : 55° min. Right : 55° min.Top : 40° min. Bottom : 40° min.
2-2. Luminance: 200(min.), 250(typ.) at Center point
2-3. Contrast Ratio :250(min.), 350(typ.)
3. SIGNAL (Refer to the Timing Chart)3-1. Sync Signal
1) Type : Separate Sync. (Horizontal & Vertical)2) Input Voltage Level : Low=0~0.8V, High=2.1~5.5V3) Sync Polarity : Positive or Negative
3-2. Video Input Signal1) Type : R, G, B Analog2) Voltage Level : 0~0.7 V
a) Color 0, 0 : 0 Vp-pb) Color 7, 0 : 0.35 Vp-pc) Color 15, 0 : 0.7 Vp-p
ADJUSTMENT ........................................................ 9TROUBLESHOOTING GUIDE .............................. 10PRINTED CIRCUIT BOARD................................... 14EXPLODED VIEW...................................................17 REPLACEMENT PARTS LIST ...............................19 PIN CONFIGURATION............................................21SCHEMATIC DIAGRAM......................................... 23
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPM OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
-
POWER CONSUMPTION
less than 25 W
less than 3 W
less than 3 W
less than 3 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
VIDEO
ACTIVE
OFF
OFF
-
- 3 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCDmonitor that are important for safety. These parts aremarked on the schematic diagram and thereplacement parts list. It is essential that these criticalparts should be replaced with the manufacturer’sspecified parts to prevent electric shock, fire or otherhazard.
• Do not modify original design without obtaining writtenpermission from manufacturer or you will void theoriginal parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULEWITH BACKLIGHT UNIT.
• Must mount the module using mounting holes arrangedin four corners.
• Do not press on the panel, edge of the frame stronglyor electric shock as this will result in damage to thescreen.
• Do not scratch or press on the panel with any sharpobjects, such as pencil or pen as this may result indamage to the panel.
• Protect the module from the ESD as it may damage theelectronic circuit (C-MOS).
• Make certain that treatment person’s body aregrounded through wrist band.
• Do not leave the module in high temperature and inareas of high humidity for a long time.
• The module not be exposed to the direct sunlight.
• Avoid contact with water as it may a short circuit withinthe module.
• If the surface of panel become dirty, please wipe it offwith a softmaterial. (Cleaning with a dirty or rough clothmay damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) orinverter circuit, must disconnect the AC adapterbecause high voltage appears at inverter circuit about650Vrms.
• Handle with care wires or connectors of the invertercircuit. If the wires are pressed cause short and mayburn or take fire.
PRECAUTION
CAUTIONPlease use only a plastic screwdriver to protect yourselffrom shock hazard during service operation.
TIMING CHART
- 4 -
VIDEO
SYNC
B
D
CF
E
A
H / V
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
Sync
Polarity
+
–
–
+
–
–
–
–
–
–
–
–
+
+
+
+
+
+
+
+
–
–
–
–
–
–
+
+
Dot
Clock
25.175
28.322
25.175
30.24
31.5
31.5
36.0
40.0
50.0
49.5
57.2832
65
75
78.75
Frequency
31.468 KHz
70.0 Hz
31.468 KHz
70.0 Hz
31.469 KHz
60.0 Hz
35.00 KHz
66.67 Hz
37.861 KHz
72.8 Hz
37.50 KHz
75.0 Hz
35.156KHz
56.25 Hz
37.879 KHz
60.3 Hz
48.077 KHz
72.188 Hz
46.875 KHz
75.0 Hz
49.725 KHz
74.55 Hz
48.363 KHz
60.0 Hz
56.476 KHz
70.0 Hz
60.023 KHz
75.0 Hz
Resolution
640 x 350
720 x 400
640 x 480
640 x 480
640 x 480
640 x 480
800 x 600
800 x 600
800 x 600
800 x 600
832 x 624
1024 x 768
1024 x 768
1024 x 768
TotalPeriod
( E )800
449
900
449
800
525
864
525
832
520
840
500
1024
625
1056
628
1040
666
1056
625
1152
667
1344
806
1328
806
1312
800
VideoActive
Time ( A )640
350
720
400
640
480
640
480
640
480
640
480
800
600
800
600
800
600
800
600
832
624
1024
768
1024
768
1024
768
Blanking Time ( B )160
99
180
49
160
45
224
45
192
40
200
20
224
25
256
28
240
66
256
25
320
43
320
38
304
38
288
32
SyncDuration
( D )96
2
108
2
96
2
64
3
40
3
64
3
72
2
128
4
120
6
80
3
64
3
136
6
136
6
96
3
BackPorch ( F )48
60
55
34
48
33
96
39
128
28
120
16
128
22
88
23
64
23
160
21
224
39
160
29
144
29
176
28
FrontPorch ( C )16
37
17
13
16
10
64
3
24
9
16
1
24
1
40
1
56
37
16
1
32
1
24
3
24
3
16
1
MODE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
(MAC)
(TEXT)
OPERATING INSTRUCTIONS
- 5 -
FRONT VIEW REAR VIEW
Front Control Panel
1. Power ButtonUse this button to turn the display on or off.<Power (DPMS) Indicator>This Indicator lights up green when the displayoperates normally. If the display is in DPM (EnergySaving) mode, this indicator color changes toamber.
2. ButtonUse these buttons to choose or adjust items in theOn Screen Display.
3. Menu ButtonUse this button to enter or exit the On ScreenDisplay.
4. AUTO/SELECT ButtonUse this button to enter a selection in the OnScreen Display.
Power Connector
When adjusting your display settings, alwayspress the AUTO/SELECT button before enteringthe On Screen Display(OSD). This willautomatically adjust your display image to theideal settings for the current screen resolutionsize (display mode).
The best display mode is 1024x768/60Hz.
See front control panel D-Sub Signal Connector
1143 2
This function optimizes the brightness, contrast orcolor value to the surrounding conditions and settingsand enables you to enjoy the most suitable picture byadjusting the surroundings (DAY/NIGHT/USERMODE).
• TEXT: For viewing letters • MOVIE: For viewing movies• PHOTO: For viewing pictures or the photographs• USER MODE: This function memorizes the
manual adjustment -Brightness, Contrast andColor value on the On Screen Display.
100
100 Bring up Contrast and Brightness adjustment. :
- 6 -
WIRING DIAGRAM
J1
CN2
CN3
J706 J704
J705
Connector Ass’y :P/N: 6631T11016C
Connector Ass’y :P/N: 6631T20022G
- 7 -
BLOCK DIAGRAM
D-S
UB
MS
T90
11in
clu
din
g(A
DC
/LV
DS
/SC
AL
ER
)
MT
V31
2M
ico
m
LC
D M
od
ule
R,G
,B
dif
fere
nti
al
LVD
S(L
ow
Vo
ltag
e
Dif
fere
nti
al S
ign
alin
g)
LIP
S5V
5V
AC
Inp
ut
3.3V
Reg
.2.
5VR
eg.
5V5V
12V
R,G
,B, H
/V S
yn
c
3.3
V2.
5V
3.3
V
2.5
V
DESCRIPTION OF BLOCK DIAGRAM
- 8 -
1. Video Controller Part & Display Data Transmitter Part.(MST9011)
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal tothe digital video signal using a pixel clock.The pixel clock for each mode is generated by the PLL.The range of the pixel clock is from 25MHz to 80MHz.This part consists of the Scaler.The Scaler gets the video signal converted analog to digital, interpolates input to 1024 x 768 resolution signal andoutputs 8-bit R, G, B signal to transmitter.Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip “MST9011” by MSTAR.This part transmit digital signal from the Scaler to the receiver of module.
2. Micom Part
This Part consists of EEPROM IC which stores control data, Reset IC and the Micom. The Micom distinguishes polarity and frequency of the H/V Sync are supplied from signal cable.The controlled data of each modes is stored in EEPROM.
3. Power Part
This part consists of the one 3.3V and one 2.5 regulators to convert power which is provided 5V in LIPS Board.5V is provided for LCD Panel and Micom part.Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.
- 9 -
ADJUSTMENT
All adjustment are thoroughly checked and correctedwhen the monitor leaves the factory, but sometimesseveral minor adjustment may be required.Adjustment should be following procedure and afterwarming up for a minimum of 10 minutes.Alignment appliances and tools.
- IBM Compatible PC- Programmable Signal Generator.(eg. VG-819 made by Astrodesign Co.)
- E(E)PROM with each mode data saved.- Alignment Adapter and Software.
1. Adjustment for Factory Preset Mode1) Run alignment program for L1510SL on the IBM
compatible PC.2) Select EEPROM All Init. command and Enter.3) Display cross hatch pattern at Mode 1.4) Select EDID WRITE command and Enter.
2. Adjustment for White Balance1) Display color 0,0 pattern at Mode 12.2) Set External Bright to MAX position and Contrast to
MAX Position.3) Select PRESET START → BIAS CAL command
and Enter.4) No attempt to manually adjust, BIAS data is auto-
matically adjusted and saved to the EEPROM.5) Display color 15,0 pattern at Mode 13.6) Select DRIVE CAL command and Enter.7) Color 1 (9300K) and Color 2 (6500K) are
automatically adjusted and saved to the EEPROM.8) Select PRESET EXIT command and Enter.
Figure 1. Cable Connection
220
IBMCompatible PC
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch(110V/220V)
Con
trol
Lin
e
Not u
sed
RS232
C
PARAL
LEL
V-SY
NC
POW
ER
ST
VGS
MONITOR
E
E
V-Sync On/Off Switch(Switch must be ON.)
F
F
A
A
BB
C
C
15105
5
69
1
1
1
14
13
25
6
5V
5V
5V
4.7K4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11Video SignalGenerator
- 10 -
TROUBLESHOOTING GUIDE
1. NO POWER
CHECK U801.
CHECK U801 PIN 1& U803PIN 3 VOLTAGE
(5V) ?
NO
NO POWER(POWER INDICATOR OFF)
CHECK POWERBOARD, AND FIND
OUT A SHORT POINT AS OPENING
EACH POWER LINE
CHECK J707VOLTAGE
PIN5, PIN6 (5V)?
NO
CHECK 5VR LINE(OPEN CHECK)
CHECK U802 PIN 3(3V) &U803 PIN 4 (2.5V)?
NO
CHECK IIC LINECONNECTION(U501, U502)
CHECK U201 VCC,XTAL, RESET
IS U201 PIN42
VOLTAGE REPEATED AS PULSE SHAPE ?
NO
YES
YES
YESNO PROBLEM
YES
CHECK KEY CONTROLCONNECTOR ROUTINE
- 11 -
2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
CHECK MICOM INVON/OFF PORT.(U501 PIN25)
J705 PIN25V?
NO
NO RASTER(OSD IS NOT DISPLAYED)
CHECK LIPS
J705 PIN5, PIN 6
5V?
NO
1. CONFIRM BRIGHTNESSOSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ PORT(U501 PIN41)
J705 PIN15V?
NO
LIPS
CHECK PULSE AS
CONTACTING SCOPE PROBE TO CAUTION LABEL.
(CONTACT PROBE TO CAUTION LABEL.
CAN YOU SEE PULSE AT YOUR SCOPE?
NO
REPLACE CCFL LAMPIN THE LCD MODULE
YES
YES
YES
YES
- 12 -
1. CHECK PIN122, 123 SOLDERING CONDITION
2. CHECK X5013. TROUBLE IN U201
U201 POWER PINS
3.3V?
NOCHECK U803, U801
U201 PIN122, 123
OSCILLATE AS12MHZ?
CHECK CONNECTION LINE FROM U201 TO U501
TROUBLE IN CABLE OR LCD MODULE
CHECK 5VR LINEU501 PIN8
5V?
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – MST9011
NO RASTER(OSD IS NOT DISPLAYED)
U501PIN41 IS 48KHz H-SYNC?PIN42 IS 60Hz V-SYNC?IS PULSE APPEARED
AT SIGNAL PINS?
NO
NO
NO
- 13 -
CHECK U803, U801
U201 POWER PIN114(3.3V)
PIN111(2.5V)?
NO
1. CHECK PC2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR LINE
CHECKR,G,B INPUT?
U201 PIN 33,30,28
NO
CHECK H-SYNC LINE(D-SUB→U501 →U201
PIN126)
CHECKH-SYNC INPUT U201 PIN 126?
NO
YES
YES
YES
CHECK V-SYNC LINE(D-SUB→U501 →U201
PIN127)
CHECKV-SYNC INPUT U201 PIN 127?
NO
YES
NO RASTER(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) – MST9011
TROUBLE IN LCD MODULE
YES
PRINTED CIRCUIT BOARD
- 14 -
R708
C711 C708
C709
J70
6
Q703
R709
C710
C80
3
R812
U80
2
C828J704
C82
1
C82
2
R76
9
J70
5
Q7
04
R74
7
R74
8
U80
1
1
R744
R74
5
R811
R801
R802
R804
C804
C82
9
R749
C83
2
C818
1
C820
R77
0
R840
R84
6
R847
R84
1
U80
4
R80
3
C230
C80
1
C81
7
C22
1
C83
1
10
0
C819C22
2
C21
7
90
80
C22
7
70
U20
1
J70
7
1
R73
5
U50
2
C516
C76
0
R84
2
R848
R84
4
R84
5
R84
3R849
U80
3
R511
C22
5
C226
C219
C80
2
11
0
C22
3C
218
60
C72
7
Q7
05
R75
3
R77
9
C73
2
R533R534
R53
7
Q5
06
R510
X501
Q5
03
R535
R532R550
C550
X2
01
C22
8C
229
12
0
R73
9
C22
0J7
02
50
R50
2
R75
0
R75
1
U50
1
R50
1
C512 C50
2
C50
3
15R536C513 10
Q5
02
C501
C51
4
5
R592
R593
R20
4
R205
C211
10
1
C21
2
C215
20
C20
7
30
C20
8
1
40
Q5
05
R525
R54
1
20
R58
1
R571
R531
D70
7
R530
R580
R570
R520
R50
4
R509
R59
0
R59
1
Q7
01
R20
7R
733
R52
2
C21
6
A
Q702
R716
R74
0
C201
C712
C202C203
C20
9
C71
3
C21
0
C714
1
R528
R529
25
C703
40
D70
3
R725
R70
5
R722
ZD
702
C505
C71
5
D70
6
R71
7
ZD701
D701D702
R701R703 R706
R20
2
R20
3
R20
8
R20
9
R21
0
R24
0
C20
5
C20
6
C23
2
C23
3
C24
0
C23
1
R20
1C
204
MODEL:L-CHASSIS-ANALOG
P/N :6870T628A11
DATE :2003.02.24
Q5
04 R51
5
30
R73
4
R540 R551
35
A
R707
R74
1U
702
C707 C73
1
C73
0
R723
R724
R726
R727
R523
R524
ZD
703
ZD
704
C50
6J7
03
1. MAIN BOARD (Component Side)
- 15 -
SW2LED1
MODEL:L1510SL
P/N:6870T628C10
DATA:2003.01.22
SW6 SW3SW4
R6
R4
SW7
R7SW5
R3 R5
R1 R
2
ZD1 SW1
ZD2
J1
3.CONTROL BOARD (Component Side)
2. MAIN BOARD (Solder Side)
1
C214
C224
C213
- 16 -
4.POWER BOARD (Component Side)
5.POWER BOARD (Solder Side)
- 17 -
EX
PL
OD
ED
VIE
W
3
24-
A
4-B
10
a
11
6 5
9
7
1
b
8
- 18 -
EXPLODED VIEW PARTS LIST
Ref. No.
1
2
3
4-A
4-B
5
6
7
8
9
10
11
a
b
Part No.
3091TKL055S
6304FLP025A
3809TKL026Y
3043TKK097A
3043TKK092A
4951TKS091R
6871TPT242B
or 6871TPT234D
or 6871TPT235B
or 6871TPT236B
3313TL5061A
4950TKK424F
6631T11016C
6871TST383A
6850TD9004D
332-068U
332-105H
Description
CABINET ASSEMBLY, L1510SL BRAND 3090TKL038
LCD(LIQUID CRYSTAL DISPLAY), LM150X06-A3M1 LG PHILPS TFT COLOR 15.0 INCH XGA LVDS SMM
BACK COVER ASSEMBLY, L1510SL 3808TKL029
TILT SWIVEL ASSEMBLY LB500J . (BASE)
TILT SWIVEL ASSEMBLY LB500J . .
METAL ASSEMBLY, FRAME MAIN (L1510SL,LPL P4)
PWB(PCB) ASSEMBLY, POWER, 15" LPL(L1510SL) POWER TOTAL SPI FSP017-2PI02
PWB(PCB) ASSEMBLY, POWER, L1510SL POWER TOTAL POWERNET PWI1510LG 12V/1.2A 5V/1A LIPS FOR L-CHASSIS LPL
PWB(PCB) ASSEMBLY, POWER, LI1510SL POWER TOTAL SANKEN 3L038WK
PWB(PCB) ASSEMBLY, POWER, ADP-30EP POWER TOTAL DELTA L1510SL LIPS