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LG FLATRON LCD 568LM, Service Manual

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LG FLATRON LCD 568LM Service Manual Download Page 11

- 11 -

2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER

CHECK MICOM INV

ON/OFF PORT.

J705 PIN5

5V?

NO

NO RASTER

(OSD IS NOT DISPLAYED)

CHECK ADAPTER

J705 PIN10

12V?

NO

1.CHECK MICOM DIM-ADJ 

PORT

J705 PIN1

5V?

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 LAMP

IN THE LCD MODULE

YES

YES

YES

YES

Summary of Contents for FLATRON LCD 568LM

Page 1: ...tp 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 18 FACTORY MODEL LM568E MODEL LCD 568LM LM568E GT ID LABEL MODEL No To apply the Toshiba Module GmZan2 Chip ...

Page 2: ...cy 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 Weigh...

Page 3: ... as pencil or pen as this may result in damage to the panel Protect the module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas 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 circui...

Page 4: ...olution 640 x 350 720 x 400 TEXT 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 MAC 1024 x 768 1024 x 768 1024 x 768 Total Period 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 Video Active Time A 640 350 720 400 640 480 640 480 640 480 640 480 800 600 800 600 800 600 800 600 832 6...

Page 5: ...tion Touch the AUTO SET button before using OSD menu This button is for the automatic adjustment of the screen position clock and phase Note Some signal from some graphics boards may not function properly If the results are unsatisfactory adjust your monitor s Position Clock and Phase manually 4 Use these buttons to choose or adjust items in the on screen display Use to adjust the brightness Use t...

Page 6: ... 6 WIRING DIAGRAM J4 CN2 CN1 J4 J10 J5 J3 Connector Ass y P N 6631T11012N ...

Page 7: ... Power 3 3V 3 3V_PL 3 3VD 2 5VD 5VR RGB 3 3V_AD Regulator BA033S 3 3V_AD Headphone MIC In MIC Out Audio In Audio Processor TDA7449 Audio Amp TDA7496L SCL SDA 78 M08 8VA 12V 12V Audio B d Audio Mute Audio B d CON 5P 12V GND SCL SDA Audio Mute 12V Audio Mute LCD Interface 20Pin Connector 12507WR 20P LVDS LVDS83 RIN RCLK Regulator BA033S Hsync2 Vsync2 Hsyncm Vsyncm 3 3V CON 5P To Audio B d Main B d A...

Page 8: ...or 6 bit bus line It makes all devices operated properly 4 Microprocessor U501 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 3V and 5VS L4978 U801 the DC DC controller IC converts input 12Vdc into 5VS and 3 3Vdc 2 5Vdc with peripheral circuit composed of condensing components ZD801 ...

Page 9: ...rodesign Co E E PROM with each mode data saved Alignment Adapter and Software 1 Adjustment for Factory Preset Mode 1 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 Balance 1 Display color 0 0 pattern at Mode 12 2 Set Ex...

Page 10: ... VOLTAGE 12V NO NO POWER POWER INDICATOR OFF CHECK ADAPTER AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK J04 S VOLTAGE 12V NO CHECK U803 CHECK U803 PIN 3 Voltage 5V NO YES YES YES CHECK KEY CONTROL CONNECTOR ROUTINE CHECK U501 CHECK U501 PIN 8 Voltage 5V NO YES ...

Page 11: ...STER OSD IS NOT DISPLAYED CHECK ADAPTER J705 PIN10 12V NO 1 CHECK MICOM DIM ADJ PORT J705 PIN1 5V 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 LAMP IN THE LCD MODULE YES YES YES YES ...

Page 12: ...LLATE AS 20M NO CHECK U401 S SOLDERING CONDITION AND CHECK CONNECTION LINE FROM U201 TO J702 NO TROUBLE IN CABLE OR LCD MODULE CHECK U805 J702 PIN1 3 3V NO YES YES YES YES 3 NO RASTER OSD IS NOT DISPLAYED gmZAN1 NO RASTER OSD IS NOT DISPLAYED U401 PIN31 IS 65MHz CLOCK PIN27 IS H SYNC PIN28 IS V SYNC IS PULSE APPEARED AT SIGNAL PINS ...

Page 13: ...K H V SYNC LINE U201 U501 D SUB U201 POWER PIN 3 3V NO 1 CHECK PC 2 CHECK SIGNAL CABLE D SUB CONNECTOR LINE CHECK R G B INPUT U201 PIN 87 91 95 NO YES YES YES NO RASTER OSD IS DISPLAYED 4 NO RASTER OSD IS DISPLAYED gmZAN1 ...

Page 14: ...UDIO PCB CHECK INPUT SIGNAL U3 TDA7449 PIN7 8 NO CHECK MAIN U501 MICOM AUDIO J3 U3 TDA7449 CHECK IIC LINE NO YES YES YES YES CHECK U3 TDA7449 CHECK INPUT SIGNAL U1 TDA7496L PIN4 9 NO CHECK U1 TDA7496L CHECK OUTPUT SIGNAL U1 TDA7496L PIN14 17 NO NO SOUND 5 NO SOUND YES ...

Page 15: ...05 D704 R723 C723 C827 L803 C214 C828 C210 C220 R575 R574 R573 R570 R505 C725 C236 B R572 R571 C727 R550 R515 R715 U701 L805 R541 C713 C831 L709 C721 R801 C719 C722 R521 R520 C821 C530 R560 C829 R561 R530 C832 R531 R206 C215 RA501 C223 C224 C212 C270 R522 R509 R508 R507 R506 R504 R503 X201 C815 C814 C840 C803 C804 R577 R519 R525 R529 R576 C833 U806 R804 R803 C836 U801 C720 R806 C841 Q711 R720 Q710...

Page 16: ... C706 C401 C250 C252 C228 C227 C229 C233 C263 C251 C248 C249 C802 C234 C241 C244 C245 C266 C265 C246 C247 C202 C201 C207 C208 R204 R203 C203 C209 R205 C509 C508 C718 C507 C516 C501 C709 C708 C504 C711 C710 C717 25 20 30 15 35 10 5 40 1 ...

Page 17: ... AUDIO L10 P N 6870T393S10 C15 C10 C7 D1 J2 R14 C11 C9 C4 D2 R4 C5 C6 C8 C13 R16 R18 10 C35 C2 11 U2 T1 R5 R13 J1 SOLDERING DIRECTION C36 R15 R30 R29 R28 R27 1 U3 20 J6 C34 C1 C22 R25 L2 R19 C14 L8 C26 C28 C18 R23 R21 R22 D6 D4 L6 C39 C23 10 11 C20 J3 L7 C38 R12 J7 L9 4 CONTROL BOARD Component Side ...

Page 18: ... 18 EXPLODED VIEW 1 5 23 8 7 14 9 16 17 22 21 6 11 10 2 15 18 3 13 12 20 4 M IC IN AU DI O IN M IC OU T 19 ...

Page 19: ...PRAY For Japan INVERTER ASSEMBLY SAMSUNG LG1511 LB565C METAL ASSEMBLY FRAME MAIN LB568 PWB PCB ASSEMBLY SUB LM568E SOUND TOTAL BRAND XAGC PWB PCB ASSEMBLY MAIN LM568E ATEUG BRAND CL 18 TOTAL PWB PCB ASSEMBLY SUB LM568E CONTROL TOTAL BRAND XAGC METAL ASSEMBLY REAR FRAME LM568 TOSHIBA CONNECTOR ASSEMBLY 20P H H 120MM UL20276 LM568E INTERFACE UNIXTAR SCREW PPB 3 10 MSWR FZMW SCREW PVS 4 10 MSWR FZMW ...

Page 20: ...15 0CC680CK41A 68PF 1608 50V 5 R TP NP0 DATE 2002 04 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C516 DCH3104K946 DCH3104K946 C518 0CK104CK56A 0 1UF 1608 50V 10 R TP X7 C530 DCH3104K946 DCH3104K946 C701 0CC030CK01A 3PF 1608 50V 0 25 PF R TP C702 0CC030CK01A 3PF 1608 50V 0 25 PF R TP C703 0CC030CK01A 3PF 1608 50V 0 25 PF R TP C704 0CC030CK01A 3PF 1608 50V 0 25 PF R TP C705 0CC030CK01A 3PF 1608...

Page 21: ...ERATECH 3 DATE 2002 04 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION BA205 6210TCE002B HB 4M3216 121JT CERATECH 3 BA206 6210TCE002B HB 4M3216 121JT CERATECH 3 Q501 0IKE704200J KIA7042AF SOT 89 TP 4 2V V Q502 0TR390409AE FAIRCHILD KST3904 LGEMTF Q505 0TR162309CA KSC1623 TP SAMSUNG SOT23 Q506 0TR162309CA KSC1623 TP SAMSUNG SOT23 Q701 0TR390409AE FAIRCHILD KST3904 LGEMTF Q710 0TR162309CA KSC1623 T...

Page 22: ...A52 R303 0RN1601F409 1 60K 1 6W 1 TA52 R304 0RN1601F409 1 60K 1 6W 1 TA52 DATE 2002 04 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R305 0RN3001F409 3K 1 6W 1 TA52 R306 0RN3001F409 3K 1 6W 1 TA52 SW301 140 058E SKHV10910B LGEC NON 12V 20 SW302 140 058E SKHV10910B LGEC NON 12V 20 SW303 140 058E SKHV10910B LGEC NON 12V 20 SW304 140 058E SKHV10910B LGEC NON 12V 20 SW305 140 058E SKHV10910B LGEC N...

Page 23: ... 1 10 W 2012 5 00 R16 0RH1202D622 12K 1 10W 5 D R TP R17 0RH2202D622 22K 1 10W 5 D R TP R18 0RH1000D622 100 1 10W 5 D R TP R19 0RH2202D622 22K 1 10W 5 D R TP R21 0RH2702D622 27K 1 10W 5 D R TP R22 0RH1002D622 10K OHM 1 10 W 2012 5 00 R23 0RH2702D622 27K 1 10W 5 D R TP R24 0RH2001D622 2 0K 1 10W 5 D R TP R25 0RH1002D622 10K OHM 1 10 W 2012 5 00 R26 0RH2001D622 2 0K 1 10W 5 D R TP R27 0RH2002D622 20...

Page 24: ... OUTR VS VS OUTL GND GND GND 20 19 18 17 16 14 15 13 12 D97AU597A SVR 10 STBY 11 PIN CONNECTION VOLUME OP AMP MUTE STBY PROTECTIONS 9 470nF INR 30K VOLUME OP AMP 30K 1000m F 1000m F 1m F 10K 4 470nF INL 7 14 11 12 17 6 5 300K 100nF VOLUME VAROUT_L OUTR STBY MUTE OUTL 1 2 3 13 18 19 20 GND 470m F SVR 10 D97AU596A VS VAROUT_R 15 16 5V S1 ST BY 5V S2 MUTE 5V S_GND 60K BLOCK DIAGRAM Pin Configuration ...

Page 25: ...2 D98AU848 MUXOUT L 10 MUXOUT R 11 PIN CONNECTION 0 30dB 2dB STEP MUXOUTL TREBLE L MUXOUTR TREBLE R LOUT SCL SDA DIG_GND ROUT D98AU847A I 2 CBUS DECODER LATCHES 100K 100K G L IN1 L IN2 100K 100K R IN1 R IN2 G INPUT MULTIPLEXER GAIN BOUT L BIN R BOUT R CREF AGND VS BIN L 5 8 9 7 6 19 20 18 4 2 3 11 17 12 13 1 10 16 15 14 RB RB VREF BLOCK DIAGRAM VOLUME VOLUME TREBLE TREBLE BASS BASS SPKR ATT LEFT S...

Page 26: ...SCHEMATIC DIAGRAM 26 1 GMZAN2 ...

Page 27: ... 27 2 LVDS ...

Page 28: ... 28 3 MICOM ...

Page 29: ... 29 4 POWER ...

Page 30: ... 30 5 CONNECTOR JACKS ...

Page 31: ... 31 6 AUDIO ...

Page 32: ... 32 7 CONTROL KEY ...

Page 33: ...Apr 2002 P NO 3828TSL072J Printed in Korea ...

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