Related Manuals for LG RT-20LZ50
Summary of Contents for LG RT-20LZ50
- Page 1 LCD TV SERVICE MANUAL CHASSIS : ML-041H MODEL : RT-20LZ50 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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Page 2: Table Of Contents
CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................12 BLOCK DIAGRAM...................17 WIRING DIAGRAM ..................18 EXPLODED VIEW .................. 19 REPLACEMENT PARTS LIST ............... 20 SVC. SHEET ....................- 2 -... - Page 3 SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards.
- Page 4 SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
- Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.
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Page 6: Contents
SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to ML-041H chassis. 2. Requirement for Test - Testing for standard of each part must be followed in below condition. (1) Temperature: 25°C ±... - Page 7 4. Reference table - Function Item Specification Remark Teletext Top(option) TOP, FLOF,LIST 10 page REMOCON PAL/ NTSC NEC Code AV Input Rear S-Vedio Input Rear Component input Rear (option : NTSC, Non-EU) PERI TV Connector Rear (option,EU) Full SCART : 1 Ear-phone output RS-232 Only Commercial Model...
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Page 8: Specification
6.Engineering Specification 6-1.General Specification Item Specification Remark Power Supply H/V Sync Video Power Consumption LED Color ≤ 65W Normal On/On Active GREEN ≤ 1W Stand By Off/Off Cut-off Switch off PBP SWAP ▶ ON/OFF ITEM Spectification Remark D-SUB Pin Configuraion 1: RED 2: Green 3: Blue:... - Page 9 6-2.Power Item Unit Remark AC Power Shut Down Voltage DC Voltage, Inverter 11.4 12.6 DC Voltage, LCD Panel 11.4 12.6 20” LPL 15” LPL, 20” AUO DC Voltage, Audio 14.0 16.0 DC Voltage, Tuner(5) Japan only DC Voltage, Tuning(33) DC Voltage, VCTi(5) DC Voltage, VCTi(8) DC Voltage, VCTi(3.3) DC Voltage, VCTi(1.8)
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Page 10: Adjustment Instruction
ADJUSTMENT INSTRUCTION 1. Application Object *Option(PAL) This document is applied to 20" Wide LCD TV which is manufactured in Monitor Factory or is produced on the basis ITEM CONDITION REMARK of this data. Option 1 Side AV No: Side AV Off 2. - Page 11 ITEM CONDITION REMARK Option 3 Language 0:ENGLISH ONLY 1:English/ German/ French/ Italian/ Spanish/ Dutch/ Swedish/ Norwegian/ Danish/ Finnish/ Portuguese/ Rumanian/ Polish/ Hungarian/ Czech/ Russian 2:English/ German/ French/ Italian/ Spanish/ Dutch/ Swedish/ Norwegian/ Danish/ Finnish/ Portuguese/ Rumanian/ Polish/ Hungarian/ Czech/ Russian 3:English/ Chinese 4:English/ Franch/Arab 5:English/ Parsi...
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Page 12: Troubleshooting
TROUBLESHOOTING No power :[A]Process (LED indicator off) Check short of main B/D Check 15V or 5V or Change Lips Fail of Lips Pass Check Output of Change Q602 Q602 Fail Pass Check Output of Change IC607, Q603. IC607, Q603. Fail Pass Change LED Assy. - Page 13 No Raster :[B]Process Check LED Status Repeat A PROCESS. on display unit. Fail Check L900,L901 Change L300,L302. L300,L302. Fail Pass Check the input/ Change IC300. Output of IC300. Fail Pass Check inverter Change inverter Connector or inverter connector or inverter. Fail Pass Change panel link...
- Page 14 No Raster on Component signal Repeat [A] Process Pass Check the signal of Check JA1200 or L6000, L6001, L6002. RCA CABLE. Fail Pass Re-soldering or Check the input/ Change the defect part, Fail output of IC100. Check X11. Re-soldering or Check the input/output Change the defect part.
- Page 15 No Raster on AV Signal No Raster on TV(RF) signal (Video, S-Video) Check 5V, 33V of TU1000. Repeat Check the output of Re-soldering or change the [A] Process . TU1000. Fail Fail defect part. Pass Check the signal of Change L702, L703, L704. L702, L703, L704.
- Page 16 No Sound Check the Change source input. input source. Fail Pass Re-soldering or change Check the input/output the defect part. of IC100. Fail Check X100. Pass Re-soldering or change Check the input/output the defect part. of IC400. Fail Pass Check the speaker. Change speaker.
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Page 17: Block Diagram
BLOCK DIAGRAM - 17 -... -
Page 18: Exploded View
EXPLODED VIEW - 18 -... - Page 19 Plate Assembly ASSY %-20LZ50(C) LPL P7 AUTOBHAN-CI C/SKD 6871TPT319A PCB Assembly,Power POWER T.T ETC 6-LAMP TV/MNT/MFT BRAND EBU30355802 Main Total Assembly RT-20LZ50 CI INDIA BRAND ML-041H EBU30355801 Main Total Assembly RT-20LZ50 CI BRAND ML-041H 68719ST077A PCB Assembly,Sub SUB T.T CL81 20LC1R ALEULFX - 68719ST077B PCB Assembly,Sub SUB T.T CL81 20LC1R SLEELFP -...
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Page 20: Replacement Parts List
REPLACEMENT PARTS LIST DATE: 2007. 01. 24. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CAPACITORs C151 0CC220CK41A C1608C0G1H220JT 22pF 5% 50V C0G -55 C152 0CC220CK41A C1608C0G1H220JT 22pF 5% 50V C0G -55 C100 0CK273CK56A 0603B273K500CT 27nF 10% 50V X7R -55 C154 0CK105CF94A... - Page 21 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C336 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R -5 C436 0CC102CK41A C1608C0G1H102JT 1nF 5% 50V C0G -55T C338 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R -5 C437 0CC102CK41A C1608C0G1H102JT 1nF 5% 50V C0G -55T C339 0CK104CK56A...
- Page 22 MCR03EZPJ101 100OHM 5% 1/10W 1608 R EAN30489901 RT-20LZ50 CI LPL VCTI F2 MICOM R138 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R EAN30489902 RT-20LZ50 CI LPL INDIA VCTI F2 MICO R140 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R EAN30490601 RT-20LZ50 CI LPL FLASH ROM R141...
- Page 23 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R217 0RJ6202D677 MCR03EZPJ623 62KOHM 5% 1/10W 1608 R R408 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 1608 R218 0RJ2001D477 MCR03EZPF202 2KOHM 1% 1/10W 1608 R/ R410 0RJ1302D677 MCR03EZPJ133 13KOHM 5% 1/10W 1608 R R219 0RJ5101D677 MCR03EZPJ512 5.1KOHM 5% 1/10W 1608...
- Page 24 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R705 0RJ4703D677 MCR03EZPJ474 470KOHM 5% 1/10W 1608 J806 6602T10002F FH12K1-50S-0.5SH 50P 0.50MM FFC/FPC R706 0RJ5101D677 MCR03EZPJ512 5.1KOHM 5% 1/10W 1608 P301 6602T10002F FH12K1-50S-0.5SH 50P 0.50MM FFC/FPC R707 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W 1608 R/...
- Page 27 Nov., 2006 P/NO : MFL36363501 Printed in Korea...