SPECIFICATIONS 1. LCD CHARACTERISTICS Type : Color TFT LCD Size : 15.0 inch (38.1cm) Pixel Pitch : 0.297mm x 0.297mm Electrical Interface : LVDS Interface Color Depth : 8-bits/ 16,194,277colors Active Video Area : 304.1mm x 228.1mm Surface Treatment : Anti-Glare, Hard Coating (3H) Backlight Unit : Bottom edge side 2CCFL (Cold Cathode Fluorescent Lamp) 2. OPTICAL CHARACTERISTICS 2-1. Viewing Angle by Contrast Ratio ≥ 10 Left : 60° typ., 50° min. Right : 60° typ., 50° min. Top : 55° typ., 40° min. Bottom : 45° typ., 40° min. 2-2. Luminance : 160(min), 200(typ) 2-3. Contrast Ratio : 150(min), 250(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=2.1~5.5V 3) Sync Polarity : Positive or Negative 3-2. Video Input Signal 1) Type : R, G, B Analog 2) Voltage Level : 0~0.714 V a) Color 0, 0 : 0 Vp-p b) Color 7, 0 : 0.467 Vp-p c) Color 15, 0 : 0.714 Vp-p 3) Input Impedance : 75 Ω 3-3. Operating Frequency Horizontal : 31 ~ 61kHz Vertical : 56 ~ 75Hz 4. POWER SUPPLY 4-1. Power Adaptor Input : AC 100~240V, 50/60Hz 1.2A Output : DC 12V 3.0A 4-2. Power Consumption 5. ENVIRONMENT 5-1. Operating Temperature: 10°C~35°C (50°F~95°F) (Ambient) 5-2. Relative Humidity : 5%~95% (Non-condensing) 5-3. MTBF : 40,000(Min) 6. DIMENSIONS (with TILT/SWIVEL) Width : 389.2mm (15.32'') Depth : 161.8mm (6.37'') Height : 382.4mm (15.05'') 7. WEIGHT (with TILT/SWIVEL) Net. Weight : 4.8kg (10.58 lbs) Gross Weight : 6.8kg (14.99 lbs) 8. Audio Spec 8-1. Audio AMP Input : 0.700Vrms Output : 1Wrms+1Wrms S/N : more then 40dB 8-2. Speaker Impedance : 4 Ω input : Max: 1.5W, Normal: 1W MODE POWER ON (NORMAL) STAND-BY SUSPEND OFF POWER OFF H/V SYNC ON/ON OFF/ON ON/OFF OFF/OFF - POWER CONSUMPTION less than 36 W less than 3 W less than 3 W less than 3 W less than 3 W LED COLOR GREEN YELLOW YELLOW YELLOW OFF VIDEO ACTIVE OFF OFF OFF -
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SPECIFICATIONS - Diagramas dediagramas.diagramasde.com/audio/LG LM568E LCD.pdf · SPECIFICATIONS 1. LCD CHARACTERISTICS Type : Color TFT LCD Size : 15.0 inch (38.1cm) Pixel Pitch
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SPECIFICATIONS
1. LCD CHARACTERISTICSType : Color TFT LCDSize : 15.0 inch (38.1cm)Pixel Pitch : 0.297mm x 0.297mmElectrical Interface : LVDS InterfaceColor Depth : 8-bits/ 16,194,277colors Active Video Area : 304.1mm x 228.1mmSurface Treatment : Anti-Glare, Hard Coating (3H)Backlight Unit : Bottom edge side 2CCFL
(Cold Cathode Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS2-1. Viewing Angle by Contrast Ratio ≥ 10
SIGNAL CABLE, UL 2990-9C(7.5) DT 1870MM GRAY(85964) LB500 DM
CORD,A/V, AUDIO UL 2851 #28-2C 1500MM QUARTZ KSD
CORD,A/V, A/V DH-1560SP-BL UL 2851 #28 1560MM GRAY(85964)
INSULATION, PVC SHEET LM568E(89483)
ADAPTER, AC, KPR-24 KAWASAKI 125V 15A BLACK -Only Japan
ADAPTER,SIGNAL, LIBERTY ENHANCE MAC 6-DIP -Only Japan
BRACKET, LB565C SUPPOTER INVERTER
EXPLODED VIEW
- 6 -
WIRING DIAGRAM
J4
CN2
CN1
J4
J10
J5 J3
Connector Ass’y P/N: 6631T11012N
(a)
(a)
(a)
(a)(a)
(a)
(a)
(a)
- 7 -
DISASSEMBLY
(b)
(b)
(c)
(c)
(c)
(a)
MIC.
IN
AUDIO
IN
MIC.
OUT
(a)
(b)
(b)
1. TILT/SWIVEL & BACK COVER REMOVAL(1) Remove two screws (a).(2) Remove the Tilt/swivel.(3) Remove four sheets.(3) Remove four screws (b) from the Back Cover.(4) Release six latchs (c).(5) Remove the Back Cover.
2. REAR METAL ASS’Y REMOVAL(1) Remove eight screws (a). (2) Remove the Rear Metal Ass’y.
Back Cover
- 8 -
(a)
(a)
(a) (a)(a)
(a)(a)
(a)
(a)
(a)
(a)
(a)
4. MAIN FRAME REMOVAL(1) Remove eight screws (a).(2) Remove the Main Frame.
5. LCD MODULE REMOVAL(1) Remove four screws (a).(2) Separate the LCD Module from the Main Frame.
LCD Module
(d)
(d)
(a)
(b)
(a)
(a)
(b)
(b)(a)
J4
J5
J10(a)
(a)
J3
J4
(c)(c)
(c)
3. MAIN PCB ASS’Y & CONTROL PCB , SOUND ASS’Y, SPEAKER ASS’Y REMOVAL(1) Disconnect J4,J5 and J10 from the Main PCB Ass’y.(2) Remove six screws (a).(3) Remove the Main PCB Ass’y.(4) Remove three screws (b).(5) Disconnect J4 and J3 from the Sound Ass’y(6) Remove the Sound Ass’y.(7) Remove three screws (c).(8) Remove the Control PCB Ass’y.(9) Remove two screws (d). (10) Remove two Metal Fix. (11) Remove the Speaker Ass’y
- 9 -
CN2
6. INVERTER ASS’Y REMOVAL(1) Disconnect CN2 (2) Remove two latch (a).(3) Remove the Inverter Ass’y.
(a)
(a)
BLOCK DIAGRAM
- 10 -
Pow
er P
art
DC
/DC
Con
vert
er(L
4973
)12
V
ST
5V
ST
5V
EE
PR
OM
24W
C08
AD
C/P
LL/S
cale
r(g
mZ
AN
1)
(MIC
OM
)
(MT
V21
2MS
64I)
Sw
itch
FD
C63
25L
Sw
itch
FD
C63
25L
Sch
mitt
Trig
ger
(74H
CT
14)
RG
B
H.V
D-
Sub
15P
DD
C
Con
trol
DC
Jack
SC
L
SD
A
CO
N10
P
Inve
rter
3.3
VD
3.3
V_P
L
Mo
du
le P
ow
er
3
.3V
3.3V
_PL
3.3V
D
ST
5V
RG
B
3.3V
_AD
Reg
ulat
orB
A03
3
Reg
ulat
orB
A03
3
Reg
ulat
orB
A03
3
3.3
V_A
D
+3.
3V
Hea
dph
one
MIC
In
MIC
Ou
t
Aud
io I
n
Aud
ioP
roce
ssor
(TD
A74
49)
Aud
io A
mp
(TD
A74
96L)
SC
LS
DA
78M
088V
A
12V
12V
(Aud
io B
/d)
Au
dio
Mut
e(A
ud
io B
/d)
CON 5P
12V
GN
D
SC
L
SD
AA
udio
Mut
e
12V
Aud
io M
ute
LCD
Inte
rfac
e20
Pin
Con
nect
or(1
2507
WR
-20P
)
LVD
S(L
VD
S83
)R
INR
CLK
Reg
ulat
orB
A03
3
Hsy
nc2
Vsy
nc2H
sync
2V
sync
2
Hsy
ncm
Vsy
ncm
+3.
3V
CON 5P
To A
udio
B/d
Mai
n B
/dA
ud
io B
/d
DESCRIPTION OF BLOCK DIAGRAM
- 11 -
1. Scaler One chip IC(GMZAN1, U3)GMZAN1 (U3) is one chip IC which it supports four internal function blocks of Video Amp, PLL,A/D converter and Video processor.Video signal (0.7Vp.p) clamped through C44, 45, 191 with matching IC’s proper cut off voltage.This signal is processed as a proper 8 bit digital signal by U3’s amplifying, phase locking, A/D converting,and scaling operations. U3 generates Clock, Horizontal and Vertical sync, Data Enable signals as LCD Panel’s input signals.
2. System Controller (Microprocessor) Circuit.1) Microprocessor (U4) distinguishes polarity and frequency by calculating horizontal and vertical sync input
from signal source. 2) Microprocessor (U4) carries out power control by sending power-down trigger signal to each IC. 3) Microprocessor (U4) communicates with EEPROM (U1), and GMZAN1 (U3)
through IIC(2 lines) or 6 bit bus line. It makes all devices operated properly.4) Microprocessor (U4) let User adjust screen by OSD function.
3. DC/ DC Converter.This circuit supplies DC power for each device needing DC voltage of 3.3VD, 3.3V_AD, 3.3V_PL, Module Power 3.3Vand 5VS.
L4973D5.1(U13) , the DC/DC controller IC converts input 12Vdc into 5VS and 3.3Vdc with peripheral circuit composed of Inductor (L11), condensing components (ZD5, C72), and Regulators(U2, U7, U24,U30). MODPWR(3.3V) for LCD module power is switched by U12, switching FET, controlled by Microprocessor.3.3VD, 3.3V_AD, and 3.3V_PL for GMZAN1 (U3) and 3.3V for LVDS (U9) are switched by U5, switching FET,controlled by Microprocessor for Power saving.
4. Display Data Transmitter Part (LVDS).This part transmit digital signal from the Scaler to the receiver of module.
5. Audio Part (TDA7449,TDA7496L)In This Circuit, Audio Processor(TDA7449) Which is Controlled by Microprocessor(U4) adjustvolume/treble/bass/balance of Audio signal which come from PC.The Signal come from TDA7449 is amplified by TDA7496L. The final output signal is output through speaker.
ADJUSTMENT
- 12 -
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
24V
AUDIO
DC OUT
MIC.IN
AUDIOIN
MIC.OUT
Figure 1. Cable Connection
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 LM568E on the IBM
compatible PC.2) Display cross hatch pattern at Mode 1.3) Select EEPROM ALL Init command and Enter.4) Press "Y" key, it will automatically save all FOS data
to EEPROM.
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 12.6) 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.
3. DDC Data Write Procedure1) Use this procedure only when there is some
probelm on EDID data.2) Select EEPROM → EDID Write command and
Enter.3) This will write the EDID data to EEPROM.
- 13 -
TROUBLESHOOTING GUIDE
1. NO POWER
CHECK U4.CHECK
U4 PIN 8 VOLTAGE(5V) ?
NO
NO POWER(POWER INDICATOR OFF)
CHECK ADAPTER,AND FIND OUT
A SHORT POINT AS OPENING
EACH POWER LINE
CHECK J1’SVOLTAGE
(12V) ?
NO
CHECK L11(OPEN CHECK)
CHECK U5 Voltage
(5V) ?
NO
U13’S PIN110V ?
CHECK U13, ANDCHECK 5VA LINE
CHECK IIC LINECONNECTION
(U4, U1)
CHECK U3’S VCC,X-TAL, RESET
IS U13 PIN2 VOLTAGE REPEATED AS PULSE SHAPE ?
NO
YES
YES
YES
NO YES
NO PROBLEM
NO
CHECK KEY CONTROLCONNECTOR ROUTINE
- 14 -
2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER
CHECK MICOM INVON/OFF PORT.
J4 PIN55V?
NO
NO RASTER(OSD IS NOT DISPLAYED)
CHECK ADAPTERJ4 PIN10
12V?
NO
1. CONFIRM BRIGHTNESSOSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ PORT
J4 PIN15V?
NO
REPLACE INVERTER ASS’Y
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
- 15 -
1. CHECK PIN141, 142 SOLDERING CONDITION
2. CHECK X23. TROUBLE IN U3
U3 POWER PINS
3.3V?
NOCHECK U2, U24
U3 PIN141, 142OSCILLATE AS 14.3M?
NO
CHECK U9’S SOLDERINGCONDITION AND CHECK CONNECTION LINE FROM U3 TO J5
NO
TROUBLE IN CABLE OR LCD MODULE
CHECK U12, U30J5 PIN13.3V?
NO
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – gmZAN1
NO RASTER(OSD IS NOT DISPLAYED)
U9PIN31 IS 65MHz CLOCK?PIN27 IS 48KHz H-SYNC?PIN28 IS 60Hz V-SYNC?IS PULSE APPEARED