LG 20LS2R Series Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LP69A
FACTORY MODEL : 20LS2R-ZA

MODEL : 20LS2R

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

Summary of Contents for 20LS2R Series

Page 1: ...E MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP69A FACTORY MODEL 20LS2R ZA MODEL 20LS2R website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ... 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 SERVICE REMOTE CONTROL 14 TROUBLE SHOOTING 15 BLOCK DIAGRAM 21 EXPLODED VIEW 22 REPLACEMENT PARTS LIST 24 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: ...vely obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a ground...

Page 5: ...not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit boa...

Page 6: ...method followed 3 2 Demanded other specification Safety CE IEC Specification EMC CE IEC 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 PAL D K B G I SECAM L NTSC NTSC 4 43 ZA 2 Receivable Broadcasting System PAL SECAM BG ZA TA PAL SECAM DK EU Non EU PAL I I PAL...

Page 7: ...racteristic specifications module standard 7 1 Display area 443 61 H 249 41 V mm 2 Outline dimension 472 0 H x 276 5 V x23 0 D mm Typ 3 Number of Pixels 1366 H x 768 V 1Pixel 3RGB Cells 4 Cell pitch 324 75um H x 324 75um V µm 1Pixel 3RGB Cells 5 Color arrangement RGB vertical stripe 6 Weight net 3 Kg Max 7 Operating Environment Temperature 0 50 deg Humidity 10 90 8 Storage Environment Temperature ...

Page 8: ...H freq kHz V freq Hz Pixel clock MHz Proposed 1 720 400 31 469 70 08 28 32 DOS 2 640 480 31 469 59 94 25 17 VESA VGA 3 640 350 31 468 70 090 25 175 DOS 4 800 600 37 879 60 31 40 00 VESA SVGA 5 1024 768 48 363 60 00 65 00 VESA XGA 6 1280 768 47 7 60 00 80 14 VESA 7 1360 768 47 700 60 00 84 62 WXGA 6 Model Specification No Item Specification Remark 1 Market EU 2 Broadcasting system PAL BG I DK SECAM...

Page 9: ...ck MHz Proposed 1 720 480 31 47 59 94 27 000 SDTV 480P 2 720 480 31 50 60 00 27 027 SDTV 480P 3 720 576 31 25 50 00 27 000 SDTV 576P 4 1280 720 37 5 50 00 74 250 HDTV 720P 50Hz 5 1280 720 44 96 59 94 74 176 HDTV 720P 6 1280 720 45 00 60 00 74 250 HDTV 720P 7 1920 1080 33 72 59 94 74 176 HDTV 1080I 8 1920 1080 33 75 60 00 74 250 HDTV 1080I 9 1920 1080 28 125 50 00 74 250 HDTV 1080I 50Hz 10 HDMI inp...

Page 10: ...d tab and then load download file XXXX bin by clicking Read 5 Click Auto tab and set as below 6 click Run 7 After downloading check OK message 3 2 ADC Process 1 PC input ADC 1 Auto RGB Gain Offset Adjustment Convert to PC in Input source Signal equipment displays Output Voltage 730 mVp p Impress Resolution WXGA 1360 x 768 60Hz Model 107 in Pattern Generator Pattern 28 in Pattern Generator MSPG 925...

Page 11: ... level 85 IRE Model 212 Pattern 78 at MSPG925L 3 Set PSM Dynamic CSM Cool 4 Confirm whether x 0 283 0 03 y 0 298 0 03 or not 4 5 Other quality A Confirm that each items satisfy under standard condition that was written product spec A Confirm Video and Sound at each source 1 AV 1 Select input AV1 and whether picture is displayed or not SCART output displayed or not 2 Select input AV2 S video and wh...

Page 12: ...when between power board s ac block and GND is impacked on 1 5kV dc or 2 2kV dc for one second 4 11 Option data setting SVC OSD setting 1 PAL Model Change by Suffix 12 Option1 1 200PR No 2 ACMS YES 3 TEXT FLOF TOP FLOF 4 CH AU 0 0 Except below area 1 China Australia 5 BOOSTER No AGC Threshold point Option2 1 SYS No BG IDK L 2 A2 ST YES Acting FM ST after checking Nicam 3 I II SAVE No 4 HDEV No 5 V...

Page 13: ...ROM 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 Drive EB 00 00 Color Save Contrast Bright H POSITION 20 00 00 100 They have different range V POSITION 30 00 00 100 each mode FOS Adjustment CLOCK 90 00 00 100 PHASE 92 00 00 100 R DRIVE 16 00 00 FF Drive adjustment G DRIVE 18 00 00 FF B DRIVE 1A 00 00...

Page 14: ...t input To check the front AV To move channel up down or to select a function displayed on the screen To adjust the volume or accurately control a specific function To set a specific function or complete setting To move the channel down in the PIP screen To use as a red key in the teletext mode To move the channel in the PIP screen To use as a green key in the teletext mode To switch between the m...

Page 15: ...f Change defect part of IC100 Q307 Change IC1100 IC1101 Pass Change IC1102 IC1103 Check Output of IC1101 IC1103 Fail Check short of IC307 TU600 IC500 Fail Re soldering of Change defect part of IC307 TU600 IC500 Pass Pass Change IC1104 IC1105 Change LED Assy Check Output of IC1104 IC1105 Pass Check LED Assy Pass Check P304 Connector Fail Check short of IC100 IC400 Fail Fail Re soldering of Change d...

Page 16: ...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 L300 Pass Check the LVDS Output of IC100 Pass Check Input source Cable and Jack Fail Change Module Fail Fail Change L300 ...

Page 17: ...ut output of R735 R736 Fail Check the J701 Pass Re soldering or change the defect part Check the X100 Check the input output of R128 R131 R136 Pass Check the input output of IC100 Pass Check input source cable and jack Fail Fail Re soldering or Change the defect part ...

Page 18: ...eck the input output of R901 Fail Check the J900 Pass Re soldering or change the defect part Check the X100 Check the input output of R125 Pass Check the input output of IC100 Pass Check input source cable and jack Fail Fail Re soldering or Change the defect part ...

Page 19: ...art Check the X100 Pass Check input source cable and jack Check input source cable and jack Repeat A B process Fail Check short of IC100 Q307 Pass Pass Fail Check 5V of TU600 Re Soldering or change the defect part Check the input output of L804 L1002 L1003 L1004 Fail Change L804 L1002 L1003 L1004 Pass Check Output of IC1104 IC1105 Pass Fail Re soldering of Change defect part Check the X100 Pass Pa...

Page 20: ... the source input Check input Output ofIC100 Fail Pass Re soldering of Change the defect part Check the X110 Check the input output of IC500 Fail Re soldering of Change the defect part Pass Check the Speaker Pass Check the Speaker wire Fail Change Speaker ...

Page 21: ... 21 BLOCK DIAGRAM ...

Page 22: ... 22 EXPLODED VIEW 300 200 410 400 530 531 430 431 432 120 590 591 580 520 ...

Page 23: ...20LS2 BASE _NON_METAL CSKD AAN31023102 Base Assembly STAND 20LS1R CL81 20LS1R STAND BODY ASSY A CSKD MCK30214205 Cover MOLD HIPS 51SF 15LS1R HIPS 51SF 20 15 LS1R STAND BODY COVER BK EBU34016301 Main Total Assembly 20LS2R BRAND LP69A EBR33871901 PCB Assembly Sub CONTROL T T LP69A 20LS2R AEUWLAX 20LS2R CONTOL T T ASS Y MEY30552602 Knob MOLD AB HF 380NB SUB CONTROL KNOB LS2R EAY32636402 Power Supply ...

Page 24: ...0CK225DFK4A C2012Y5V1C225MT 2 2uF 20 16 C1133 0CK104CK56A 0603B104K500CT 100nF 10 50V C1138 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 1 C114 0CK104CK56A 0603B104K500CT 100nF 10 50V C1140 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 1 C1141 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 1 C116 0CK104CK56A 0603B104K500CT 100nF 10 50V C117 0CK104CK56A 0603B104K500CT 100nF 10 50V C118 0CK104CK56A 0603B104K500CT 100nF 10 ...

Page 25: ...C0G1H102JT 1nF 5 50V C C408 0CK104CK56A 0603B104K500CT 100nF 10 50V C409 0CK104CK56A 0603B104K500CT 100nF 10 50V DATE 2006 12 28 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C500 0CK225DK94A CL21F225ZBFNNNE 2 2uF 20TO C501 0CE476WH6DC MVK8 0TP25VC47M 47uF 20 25V C502 0CK103CK56A 0603B103K500CT 10nF 10 50V C503 0CK103CK56A 0603B103K500CT 10nF 10 50V C504 0CK474DH56A C2012X7R1E474KT 470nF 10 25 C50...

Page 26: ...5 6V 5 49TO5 73V 60 ZD804 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 ZD809 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 ZD811 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 DATE 2006 12 28 S AL LOC NO PART NO DESCRIPTION SPECIFICATION ZD900 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 ZD901 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 ZD902 0DZ560009DA UDZS5 6B 5 6V 5 49TO5 73V 60 ZD903 0DZ560009DA UDZS5 6B 5 6V 5 49...

Page 27: ...O DESCRIPTION SPECIFICATION R1021 0RJ0561D677 MCR03EZPJ5R6 5 6OHM 5 1 10W R1022 0RJ0561D677 MCR03EZPJ5R6 5 6OHM 5 1 10W R103 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R104 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R105 0RJ1201D677 MCR03EZPJ122 1 2KOHM 5 1 10 R106 0RJ3302D677 MCR03EZPJ333 33KOHM 5 1 10W R1104 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R1105 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R1106 0RJ1...

Page 28: ...10W R256 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R257 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W DATE 2006 12 28 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R258 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R259 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R260 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10W R261 0RJ3301D677 MCR03EZPJ332 3 3KOHM 5 1 10 R262 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10 R264 0RJ1002D677 MCR...

Page 29: ...222D677 MCR03EZPJ220 22OHM 5 1 10W R825 0RJ5600D677 MCR03EZPJ561 560OHM 5 1 10W R827 0RJ5600D677 MCR03EZPJ561 560OHM 5 1 10W R831 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R833 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 10 R836 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R900 0RJ0752D477 MCR03EZPF750 75OHM 1 1 10W R901 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R902 0RJ0752D477 MCR03EZPF750 75OHM 1 1 10W DATE 200...

Page 30: ...875S ALY NPN 5V 60V 50V R5001 0RH1501D622 MCR10EZHJ152 1 5KOHM 5 1 8W R5002 0RH1001D622 MCR10EZHJ102 1KOHM 5 1 8W 2 R5003 0RH1001D622 MCR10EZHJ102 1KOHM 5 1 8W 2 R5004 0RH1001D622 MCR10EZHJ102 1KOHM 5 1 8W 2 R5005 0RH1001D622 MCR10EZHJ102 1KOHM 5 1 8W 2 ZD5000 0DZRM00178A UDZS5 1B 5 1V 4 98TO5 2V 80O 6631T20029B 5P 2 0 750MM SMH200 05 SMH2 A1 MFL33997804 PRINTING USER LP63A BRAND 20 A2 SAC30033605...

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Page 33: ...Dec 2006 Printed in Korea P NO MFL37421403 ...

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