LG 23LS7D Service Manual Download Page 2

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CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ........................................................................ 3

SPECIFICATION ...................................................................................... 4

ADJUSTMENT INSTRUCTION ............................................................... 7

TROUBLE SHOOTING .......................................................................... 11

WIRING DIAGRAM ................................................................................ 17

BLOCK DIAGRAM ................................................................................. 18

EXPLODED VIEW .................................................................................. 20

REPLACEMENT PARTS LIST .............................................................. 22

SVC. SHEET ...............................................................................................

Summary of Contents for 23LS7D

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LJ71A MODEL 23LS7D 23LS7D JA website http biz LGservice com ...

Page 2: ... 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 7 TROUBLE SHOOTING 11 WIRING DIAGRAM 17 BLOCK DIAGRAM 18 EXPLODED VIEW 20 REPLACEMENT PARTS LIST 22 SVC SHEET ...

Page 3: ...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 metallic part has a ...

Page 4: ...TV test method followed 2 Demanded other specification Safety JQA Specification EMC JQA Specification SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General Specification TV No Item Specification Remark 1 Video input applicable system NTSC M ISDB S 2 RF Input Channel 1 VHF 1 12 2 UHF 13 62 3 CATV C13 C38 4 Terr digital 000 999 Logical CH Number ...

Page 5: ...ical characteristic specifications 5 1 Display area 508 152 H x 285 696 V mm 2 Outline dimension 546 0 H x 318 3 V x 46 0 D mm Typ 3 Number of Pixels 1366 H x 768 V 1Pixel 3RGB Cells 4 Cell pitch 372 μm H x 372 μm V μm 1Pixel 3RGB Cells 5 Color arrangement RGB vertical stripe 6 Weight net 3 3 Kg 7 Operating Environment Temperature 0 50 deg Humidity 10 90 8 Storage Environment Temperature 20 60 deg...

Page 6: ...deo Input NTSC 3 58 NTSC4 43 PAL PAL60 SECAM No Guarantee 6 D terminal Input Y Pb Pr D4 480i 480P 720P 1080i 576i 576p 720p 50Hz 1080i 50Hz No Guarantee 7 HDMI Input HDMI 8 Audio Input L R Input 3EA CVBS S video D terminal 9 Digital Optical Audio output AAC 5 1c Output Available for Digital TV only PCM 2ch Output 10 Modem 2400bps max 11 Conditional Acess System B CAS System 12 EPG 13 DATA Broadcas...

Page 7: ...splayed check connecting computer jig and set again 4 Click Connect If Can t is displayed check connecting computer jig and set 5 Click Read tab and then load download file XXXX bin by clicking Read 6 Click Auto tab and set as below 7 click Run 8 After downloading check OK message 3 2 ADC Process 1 COMPONENT input ADC 1 Component Gain Offset Adjustment Convert to Component in Input source Signal e...

Page 8: ...or not 5 AV2 Select input AV2 CVBS S video and whether picture is displayed or not 6 COMPONENT Select input COMPONENT and whether picture is displayed or not 7 HDMI Select input HDMI and whether picture is displayed or not 4 5 Power Consumption 1 Press EYE button on LG Adjust remocon and check whether LED color is amber or not 2 Press POWER button on LG Ajust remocon to enter Stand by mode 3 Check...

Page 9: ...280 Area 0 value compulsorily 5 Adjustment Command 5 1 Adjustment Commands LENGTH 84 9 TOOL OPTION 17280 AREA OPTION 0 OPTION 1 6 OPTION 2 2 OPTION 3 2 OPTION 4 0 OPTION 5 9 FACTORY ON E0 00 00 Factory mode on FACTORY OFF E2 00 00 Factory mode off EEPROM ALL INIT E4 00 00 EEPROM All clear EEPROM Read E7 00 00 EEPROM Read EEPROM Write E8 00 data EEPROM Write by some values COLOR SAVE R G B cutoff D...

Page 10: ... of E2 PROM 5 4 VRAM Read 1 Send CMD 70h to read Video RAM value from MICOM And save its value to 128 Bytes Buffer Common Buffer for the use of EDID 2 Delay 500ms Time to Wait and Read Video RAM from MICOM 3 Be transmitted the contents of MICOM s 128 bytes Buffer to PC 128th Data is the CheckSum of 127 bytes data That s OK if the value of adding 128 bytes Data is Zero 128 Bytes Delay 100ms Data 12...

Page 11: ...ering or Change defect part of IC100 Q308 Change IC1000 IC1004 Pass Change IC1006 IC1005 Check Output of IC1006 IC1005 Fail Check short of Q308 TU600 IC500 Fail Re soldering or Change defect part of Q308 TU600 IC500 Pass Pass Change IC1002 IC1003 Change LED Assy Check Output of IC1002 IC1003 Pass Check LED Assy Pass Check P306 Connector Fail Check short of IC100 IC400 Fail Fail Re soldering or Cha...

Page 12: ...Link Cable or Module Pass Fail Change Panel Link Cable or Module Check Inverter Connector or inverter Fail Change Inverter Connector or Inverter Pass Change IC100 Check Output of Q308 Pass Check the LVDS Output of IC100 Pass Check Input source Cable and Jack Fail Change Module Fail Fail Change Q308 ...

Page 13: ... the input output of R918 Fail Check the P901 Pass Re soldering or change the defect part Check the X100 Check the input output of R127 Pass Check the input output of IC100 Pass Check and Change the Digital board Fail Fail Re soldering or Change the defect part ...

Page 14: ...eck the input output of R806 Fail Check the J801 Pass Re soldering or change the defect part Check the X100 Check the input output of R121 Pass Check the input output of IC100 Pass Check input source cable and jack Fail Fail Re soldering or Change the defect part ...

Page 15: ...e defect part Check the X100 Pass Check input source cable and jack Check input source cable and jack Repeat A B process Pass Check the output of TU600 Pass Pass Fail Check 5V of TU600 Re Soldering or change the defect part Check the input output of L702 R954 R948 Fail Change L702 R954 R948 Pass Check input output of IC100 Pass Fail Re soldering of Change defect part Check the X100 ...

Page 16: ...the source input Check input Output of IC100 Fail Pass Re soldering of Change the defect part Check the X110 Check the input output of IC500 Fail Re soldering or Change the defect part Pass Check the Speaker Pass Check the Speaker wire Fail Change Speaker ...

Page 17: ...2 6631T20010F 13 EAD38509801 11 6631900013B 10 6631900048B 9 EAD38599001 8 6631T20033C 7 EAD38598901 6 5 EAD38598801 4 3 6631900012C 2 EAD38599102 1 Part No No 2 6631T200 1 A 3 4 3 1 14 2 3 4 7 8 13 9 5 6 11 12 10 T 5 6631 2 2 R 0 3 EAD3 3 9 9 0 01 2 ...

Page 18: ... 18 Connec t t o nex t page Connec t t o nex t page Connec t t o nex t page Connec t t o nex t page BLOCK DIAGRAM 1 Digital ...

Page 19: ...MX25L4005A EXT_ISP TMDS Sig nal IIC D4 DIGITAL Bo ard Aud io SIDE AV Aud io EEPROM 2k D SUB Tuner TAFT H003F VIDEO SIF L R LVDS Sig nal L R Sc aler Vid eo Dec o rd er LGE9689AD LF L R Po wer Vo l Vo l Ch Ch So urc e Po wer Vo l Vo l Ch Ch So urc e LED G IR LED R G IR rec eiver Y Pb Pr DIGITAL Bo ard SIDE S VIDEO Y C D4 Aud io L R CVBS Aud io L R SIDE CVBS AV2 Y C RS232 2 Analog ...

Page 20: ... 20 300 200 LV1 550 600 601 551 120 590 591 910 920 900 930 570 560 561 580 520 521 400 531 530 581 EXPLODED VIEW A21 A2 ...

Page 21: ...e Shield PRESS SPTE 0 6T SHIELD SPTE HLS METAL D BOARD SHIELD 570 EBR37252602 Hand Insert PCB Assembly Sub SUB M I LJ71A INTERFACE_1 and INTERFACE_2 580 EAY33025102 SMPS AC DC LGLP 2627 HEP 90VTO264V 140W 47 63 UL CSA SEMKO JAPAN DTV HSL 581 EAD38599102 Drawing Assembly AC SOCKET AND SWITCH ASSEMBLY UL1015AWG22 590 EBR38656001 PCB Assembly Sub SUB T T LJ71A 2XLS7D JA AJLWLAX IR LED 591 MES38698301...

Page 22: ...50V X7R 55TO 125 C121 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C122 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C123 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C124 0CC102CK41A C1608C0G1H102JT 1nF 5 50V C0G 55TO 125C C125 0CK473CK56A C1608X7R1H473KT 47nF 10 50V X7R 55TO 125 C126 0CC560CK41A C1608C0G1H560JT 56pF 5 50V C0G 55TO 125C C127 0CC560CK41A C1608C0G1H560JT 56p...

Page 23: ... X7R 55TO 125 C402 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C403 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C404 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C405 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C406 0CK104CK56A 0603B104K500CT 100nF 10 50V X7R 55TO 125 C407 0CC102CK41A C1608C0G1H102JT 1nF 5 50V C0G 55TO 125C C408 0CK104CK56A 0603B104K500CT 100nF 1...

Page 24: ...5 49TO5 73V 60OHM 200MW SOD3 ZD901 0DZ560009GB BZT52C5V6S F 5 6V 5 2TO6V 40OHM 200MW SO ZD906 0DZ560009GB BZT52C5V6S F 5 6V 5 2TO6V 40OHM 200MW SO ZD908 0DZ560009GB BZT52C5V6S F 5 6V 5 2TO6V 40OHM 200MW SO ZD909 0DZ560009GB BZT52C5V6S F 5 6V 5 2TO6V 40OHM 200MW SO IC1 0IPRPPH024A TDA8024T 2 7TO6 5V 1 5mA 2 2TO3 2MHZ SO R IC100 EAN33715803 LGE9689AD LF 300MVTO3 6V 300MVTO2 75V 300M IC1000 0IMCRKE00...

Page 25: ...0RJ0332D677 MCR03EZPJ330 33OHM 5 1 10W 1608 R TP R159 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R16 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP R160 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R161 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R162 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R164 0RJ2202D677 MCR03EZPJ223 22KOHM 5 1 10W 1608 R TP R165 0RJ2202D677 MCR03EZ...

Page 26: ...0W 1608 R TP R322 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10W 1608 R TP R323 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10W 1608 R TP R325 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R326 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W 1608 R TP R327 0RJ5600D677 MCR03EZPJ561 560OHM 5 1 10W 1608 R TP R332 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2012 R TP R333 0RJ1202D677 MCR03EZPJ123 12KOHM 5 1 10W 1608 R TP R33...

Page 27: ...5 1 10W 1608 R TP R952 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W 1608 R TP R953 0RJ5601D477 MCR03EZPF562 5 6KOHM 1 1 10W 1608 R TP R954 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP R955 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP R956 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1608 R TP R958 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W 1608 R TP R959 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W 1608 R TP RA...

Page 28: ... 260mM 2 00MM 6631T20033C SMH200 5P SMH200 5P 220mM 2 00MM 5P UL1061 6631T25023R 6631T25023R SMH250 SMH250 140mM 2 50MM 13P 6631T25026L 4P TO TERMINAL 350 650 SMH250 35098T 600m EAD38509801 8P 650 SMH200 08 SMH200 08 650mm 2 00MM 8 EAD38598801 SMH200 14 TUBE SMH200 14 SMH200 14 100MM EAD38598901 SMH 15 TUBE SMH200 15 YEON HO SMH200 15 EAD38599001 10P SHIELD YDH200 10 YEON HO YDH200 10 EAD39242201 ...

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Page 45: ...Aug 2007 Printed in Korea P NO MFL38623703 ...

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