LG 42PG60UD, Service Manual

Page 1: ...PLASMA TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PA81A MODEL 50PG20D 50PG20D AA website http biz LGservice com Internal Use Only ...

Page 2: ... Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 6 TROUBLE SHOOTING 11 BLOCK DIAGRAM 17 EXPLODED VIEW 24 SVC SHEET PRINTED CIRCUIT DIAGRAM ...

Page 3: ...by it s Neck Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed...

Page 4: ...ion by part number in accordance with SBOM 5 The receiver must be operated for about 20 minutes prior to the adjustment V Test Method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CB specification EMC CISPR 13 specification V General Specification 50 WXGA Display Screen Device Aspect Ratio PDP Module Operating Environment Storage Environment Input Voltage 1 2 3 4 ...

Page 5: ...ut 1EA Component Input 2EA RGB Input HDMI Input 3EA Audio Input 6EA SPDIF Out 1EA USB 1 2 3 4 5 6 7 8 9 10 11 No Item Specification Remark Australia 1 PAL BG 2 DVB T Analog Upper Heterodyne Digital COFDM PAL NTSC PAL NTSC Y Cb Cr Y Pb Pr RGB PC HDMI PC HDMI DTV RGB DVI Audio Component AV SPDIF Out X Studio JPEG MP3 Upgrade USB1 3 Rear AV 1EA Side AV 1EA Side AV Analog D Sub 15Pin HDMI1 DVI HDMI2 H...

Page 6: ...ry sick the PCB ASSEMBLY 2 Using power on button of the control R C power on TV 3 S W download process is executed automatically 4 Auto control adjustment process V All adjustment process is executed one time through RS 232C V Command send ADC Calibration Model name download EDID download V Adjsutment process protocol RS 232C 5 Manual model name download 1 Press ADJ KEY on R C for model name D L 2...

Page 7: ...VOL and press ENTER V 4 ADC Adjustment is executed automatically 7 EDID Download 7 1 Required Equipment 1 Press ADJ KEY on R C and enter EZ ADJUST 2 Select 5 EDID D L by using D E CH and press ENTER V 3 Select Start and press ENTER V 4 EDID download is executed automatically 5 Press EXIT key on R C 7 2 EDID DATA 1 RGB EDID 2 HDMI 1 3 HDMI 2 4 HDMI 3 1 1 Product ID Do not connect HDMI and RGB cable...

Page 8: ...pensated White Red Green Blue revised by CS 1000 and adjust in accordance with balance adjustment coordinate W Color temperature standards according to CSM and Module W Change target luminance and range of the Auto adjustment W B equipment W White balance adjustment coordinate and color temperature PC for communication through RS 232C UART Baud rate 115200 bps Each PCB assembly must be checked by ...

Page 9: ...y inside pattern 5 Control is carried out on three color temperatures COOL MEDIUM WARM Control is carried out thress times Temperature COOL R Cut G Cut B Cut is set to 64 Control R Gain and G Gain Each Gain is limited to 192 Temperature MEDIUM R Cut G Cut B Cut is set to 64 Control R Gain and G Gain Each Gain is limited to 192 Temperature WARM R Cut G Cut B Cut is set to 64 Control G Gain and B Ga...

Page 10: ... training and service purposes 1 2 3 4 5 6 7 8 9 10 Antenna 10 Off 16 9 1 Vivid Medium Off Auto Standard Off 0 On On Off On Off Normal Level 0 Item Condition No Remark Input Mode Volume Level Mute Aspect Ratio SET ID Picture PSM Color Temp Advanced Cinema Black level Sound SSM AVL Balance TV Speaker Time Auto Clock Manual Clock Off Timer On Timer Sleep Timer Auto Off Option SIMPLINK Key Lock ISM M...

Page 11: ...Monitor signal come out Yes 7 Check the VSC Vs ON signal Doesn t the high tension output come out Doesn t the VSC signal Vs ON come out Yes Yes Does high tension output voltage Drop occur When the Y B D Module input connector is removed does output voltage drop occur When the Y Z B D Module input connector is remove does Power Board hightension output voltage Drop occur Yes No No 9 Check the Power...

Page 12: ... 2 Check following A Power cord is plugged with TV set Plug the power cord Yes No Is the AC INLET connected with the power board Connect the AC INLET Yes No Is the Fuse F101 F801 on Power Board normal Replace the Fuses Yes No Is the Power Board with VSC Board though Cable connected Connect the Cable Yes No Measure output voltages 16V 12V 5V on the power board If the measured values is not normal r...

Page 13: ... of Ctrl B D Yes No Yes Is the Y Board normal Is the output voltage normal after remove P209 connector of Y B D Is the Fuse FS201 on Y B D normal In case of open is replace Yes No Yes Yes Replace Z Board Is the Z Board normal Is the output voltage normal after remove P3 connector of Z B D Is the Fuse FS1 on Z B D normal In case of open is replace Yes No Yes Is the X Board normal Is the output volt...

Page 14: ...ormal Is the VAVS on Check the PDP Module Yes No YES Yes Reconnect the LVDS cable in P501 No Is the IC700 FLI106X0H Output normal Replace the VSC No NO Replace the Power board Is output the normality Low High voltage except stand by 5V NO 4 No Raster 1 Symptom 1 No OSD and image occur at screen 2 It maintains the condition where the front LED is green 2 Check following ...

Page 15: ...Symptom 1 LED is green 2 The minute discharged continuously becomes Accomplished from module 2 Check following Is the LVDS cable normal Is the VSC Board normal Is the LVDS cable connected Connect the LVDS cabel with the VSC board Yes No No Yes Is the IC100 FLI106X0H normal Replace the IC100 FLI106X0H No Is the Ctrl Board of Module normal Replace the Ctrl B D No No Yes Replace the VSC B D Replace t...

Page 16: ...ormality display 3 In case of becomes unusual display from RF mode 4 In the case of becomes unusual display from side S video AV mod Is the Tuner normal Is the RF cable connected with TV Set Connect the RF cable Yes No No Is the IC100 FLI106X0H normal Replace the Tuner No Is the Input voltage IIC Communication and CVBS output normal Yes Is the IIC communication waveform between the tuner and IC100...

Page 17: ...s unusual display from HDMI mode 7 In the case of becomes unusual display from component mode Is the R G B input and H V Sync of the JK104 normal Check the input source No Is the HDMI IC201 normal Yes Same as Block A Is the TMDS waveform between the IC and HDMI jacks normal No Is the Video input of component jack normal Yes Same as Block A Check the input source No Replace the IC201 No Yes Same as...

Page 18: ...ck following All input mode is no sound Only HDMI is No Sound Yes Download the EDID data Yes No YES Only RF is no sound Check the Tuner s IN OUTPUT Yes No Is the IC602 normal Replace the IC602 MSP4458 No Is the IC601 normal Replace the IC601 NTP 3000A No YES Replace the VSC Board YES Is the speakers turned on OSD menu Set on the speakers on menu No Is the speaker Cable connect Connect the Speaker ...

Page 19: ...RS 232C TMDS351PAG IC201 Y Pb Pr L R DTV MNT OUT I2S EEPROM 24LC512 IC907 HDMI4 RGB TMDS 0 7 TMDS 0 7 CVBS SIF NLASB3157 IC502 LVDS TMDS ODD 10 bit Host Address 0 24 Host Data 0 15 LPF DDR2 Data 0 15 DDR2 SDRAM 64MByte Qimonda IC701 DDR2 Data 16 31 DDR2 Address 0 12 I2C MICOM WT61P8 IC802 I2C MAX3232CDR IC101 TX RX TX NLASB3157 IC1013 TX TX AT24C16AN IC801 FLI10306 TS 0 CLK SY VAL Serial Module I2...

Page 20: ...rved Only for training and service purposes BlockDiagram Reset KIA7029AF Power On Reset IC803 MICOM Reset NRST S29GL256N10TFI020 NOR Flash IC404 RESET EJTAG RESET EJ_RST_N SYS RESET RESET_N Tic S W NTP3000 SW_RESET VXO_D5 TUNER FE_RESET VXI_D14 FLI10306 MICOM GPIOE6 MSP4458G ...

Page 21: ...2_3 3V SCL2_3 3V Module X4 0x72 MICOM 0x50 NTP3000 0x54 TUNER Digital R 0x1E W 0x1F Master I2C 1 TUNER Analog R 0x87 W 0x86 NVRAM 24LC512 W 0xA6 R 0xA7 SDA1_5V SCL1_5V Master I2C 0 Slave I2C 0 Slave I2C 2 Slave I2C 1 EDID AT24C02BN EDID AT24C02BN EDID AT24C02BN EDID AT24C02BN TMDS 351PAG IC202 FLI10306 EDID AT24C02BN DSDA1 DSCL1 MICOM EDID AT24C02BN ...

Page 22: ...12V KA7809 IC1005 5V KIA78R05F IC1011 5V TUNER NTP3000A 16V P_ 16V KIA78R33F 1A IC1012 3 3V_ON 3 3V TUNER 3 3V AZ1117H 1 8TRE IC1004 1 8V AZ1117H 3 3 IC1003 3 3V_STBY FET Power S W Q1003 5V RL_ON PWR_ON OFF Tuner Tuner HDMI S W CI buffer Flash Memory NTP3000A Chaplin AUD_VREFP Tuner NTP3000A RS 232 Driver Sub Micom HDMI S W OPTIC Jack NVRAM USB ...

Page 23: ...s Inc All right reserved Only for training and service purposes Power Voltage BlockDiagram 5V KIA78R33F 1A IC1001 3 3V_ON 3 3V DOUGLAS PQ018EZ02ZPH 0 23 IC1000 1 8V_DOUGLAS_DDR 1 8V_DOUGLAS_EN SC4519STRT 600Khz 3A 0 41 IC1002 1 26V_DOUGLAS 1 26V_DOUGLAS_EN ...

Page 24: ...t 2008 LG Electronics Inc All right reserved Only for training and service purposes EXPLODED VIEW A2 900 400 250 200 209 302 303 304 305 300 120 570 560 561 571 301 240 580 207 208 201 204 205 206 202 203 910 590 280 290 520 230 401 591 ...

Page 25: ...112 0 1uF 16V C903 9 0 1uF 16V C915 6 0 1uF 16V C903 7 0 1uF 16V C905 4 0 1uF 16V C916 1 0 1uF 16V C908 7 0 1uF 16V C904 9 0 1uF 16V C904 7 0 1uF 16V C910 7 0 1uF 16V C919 8 3 3V_DOUGLA S 0 1uF 16V C916 5 0 1uF 16V C919 6 3 3 V_DOUGLAS_VA A 3 3V_DOUGLAS_VDD I 3 3V_DOUGLA S 0 1uF 16V C919 7 3 3V_DOUGLAS_VA A 3 3V_DOUGLAS_VDD I 1 10W 0 5 R901 3 3V_DOUGLA S 3 3 V_S TBY 3 3 V_S TBY DEBUG_R X DEBUG_T X...

Page 26: ...2 1 VI N 2 VC 3 VOUT 4 NC 5 GND1 6 GND2 0 1uF 16 V C103 0 0 1uF 16 V C105 8 0 1uF 16 V C103 7 100u F 16 V C109 4 0 1uF 16 V C102 9 3 3V_TUNE R THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATE S SPECIAL FEATURES IMPORTANT FOR PRO TECTION FROM X RADIATION FILRE AND ELECTRICAL SHOCK HAZARDS WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN...

Page 27: ...l Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes MAIN TOP PRINTED CIRCUIT BOARD Control B D BOTTOM Control B D TOP MAIN BOTTOM PREAMP B D BOTTOM PREAMP B D TOP ...

Page 28: ...Apr 2008 Printed in Korea P NO MFL41834603 ...