LG Electronics 20LC1R-ZG manual

LCD TV SER VICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : CL-81 MODEL : 20LC1R-ZG website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html Downloaded From TV-Manual.com Manuals[...]

- 2 - CONTENTS CONTENTS .............................................................................................. 2 PRODUCT SAFETY ..................................................................................3 DISASSEMBL Y ..........................................................................................6 SPECIFICA TION ..........[...]

- 3 - SAFETY PRECAUTIONS Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by i n t h e 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, F[...]

- 4 - CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow t[...]

- 5 - IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard techni[...]

- 6 - DISASSEMBL Y #1 #2 Detached stand assy (Remove the screws) #3 Disassembly stand assy #4 Detached Backcover (Remove the screw) #5 Open the Backcover's latch with jig #6 Unlock latch between Cabinet and Backcover Downloaded From TV-Manual.com Manuals[...]

- 7 - SPECIFICA TION 1. Application range This specification is applied to CL-81 chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition. (1) Temperature: 25°C ± 2°C (2) Humidity: 65% ± 10% (3) Power: Standard input voltage (AC 100-240V, 50/60Hz) (4) Measurement must be performed after heat-run mor[...]

- 8 - 6.Optical Character Item Remark Specification Viewing Angle <CR 10> Luminance Contrast Ratio CIE Color Coordinates All White/All Black In AV Input PSM : Dynamic White (100 IRE) R/L, U/D Luminance(cd/ ) Variation CR Typ 88/88 88/88 450 350 0.313 0.329 0.283 0.298 0.274 0.286 Min 85/85 85/85 380 280 0.283 0.299 0.253 0.268 0.244 0.256 WHI[...]

- 9 - 7. Outgoing Condition No Item Condition Remark 1 Power Off 2 Volume Level 30 3 Main Picture Input TV 4 Main Last Channel Pr 01 5 Mute Off 6 Station Auto Program Manual Program Program Edit Favorite Program None 7 Picture PSM Dynamic CSM Normal Dynamic Contrast 100 Brightness 50 Colour 70 Sharpness 50 Tint 0 NTSC OPTION 8 Sound SSM Flat AVL Of[...]

- 10 - 8-1.General Specification 8.Engineering Specification 1 2 3 Power Supply Normal Stand By Cut-off Switch off ITEM D-SUB Pin Configuraion Control Function H/V Sync On/On Off/Off - Spectification 1: RED 3: Blue 5: S.T(GND) 7: Green GND 9: N.C 11: ID0(GND) 13: H-Sync 15: SCL 1) Contrast/Brightness/Colour/Sharpness/(Tint) 2) Power On/Off, Input s[...]

- 11 - 9. Preset CH information PIF[MHz] SYSTEM Video Sound TXT NAME System Mode LGE KUMI PR 0 45.25 PAL-BG PHILIPS MONO C 01 PR 1 575.25 SECAM-DK DIGITAL DUAL C 34 PR 2 175.25 PAL-BG PHILIPS STEREO FLOF C 05 PR 3 231.25 PAL-I FUBK MONO S 11 PR 4 675.25 NTSC-M DIGITAL MONO C 48 PR 5 62.25 SECAM-BG PHILIPS DUAL C 04 PR 6 189.25 PAL-BG Crosshatch NIC[...]

- 12 - 1. Application This document is applied to 20.1" LCD TV which is manufactured in Monitor Factory or is produced on the basis of this data. 2. Designation 2.1 The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing. 2.2. Power Adjustment : Free V[...]

- 13 - 3.2 Total Assembly line process 3.2.1 Adjustment Preparation IIC_SW should set to "0" Above 30 minutes H/run in RF no signal 3.2.2 Confirmation of Luminance Set Statement Input : AV2 PSM : Dynamic CSM : Normal Signal equipment displays Output Voltage : 700 mVp-p Output Mode : Full White pattern Confirm whether luminance is over 350[...]

- 14 - SVC REMOCON NO. KEY FUNTION REMARK 1 POWER To turn the TV on or off 2 MUTE To activate the mute function. 3 P-CHECK To check TV screen image easily. Shortcut keys 4 S-CHECK To check TV screen sound easily Shortcut keys 5 ARC(23inch) To select size of the main screen Shortcut keys (Auto, 4:3, 16:9, 14:3, Zoom, Cinema Zoom) 6 CAPTION Switch to[...]

- 15 - TROUBLESHOOTING No power (LED indicator off) Check short of main B/D or Change Lips Change U406 Change LED Assy Check 15V or 5V of Lips Check Output of U406 Check LED Assy Check J103, J125, J126 Connector Fail Fail Change Q402 Check Output of Q402 Fail Pass Fail Pass Pass Pass :[A]Process Downloaded From TV-Manual.com Manuals[...]

- 16 - No Raster Check LED Status on display unit Check the input/ Output of U301 Check U401~U405, U407, U409 Check inverter Connector or inverter Check input source cable and jack Repeat A PROCESS Fail Change U401~U405, U407, U409 Fail Change U301 Fail Change inverter connector or inverter Fail Change panel link cable or module Fail Check panel li[...]

- 17 - No Raster on AV Signal (SCART, CVBS, S-VHS) No Raster on TV(RF) signal Change L108, L109, L110, L112, R194, R198, R184 Check the signal of L108, L109, L110, L112 R194, R198, R184 Repeat [A] Process Check the output of TU701 Check the input/output of U301 Check the input/output of U101 Check input source cable and jack Fail Fail Fail Fail Re-[...]

- 18 - No Sound Check the speaker wire Change source input Check the input source Fail Pass Re-soldering or Change the defect part Check X301 Check the input/output of U301 Fail Pass Re-soldering or Change the defect part Check the input/output of U201 Fail Pass Change speaker Check the speaker Fail Pass Downloaded From TV-Manual.com Manuals[...]

- 19 - BLOCK DIAGRAM Downloaded From TV-Manual.com Manuals[...]

- 20 - BLOCK DIAGRAM DESCRIPTION Power Supply Block (LIPS) This Block Generates DC Voltage (5V,15V) to Main Control system from AC Power (100-240 V, 50/60 Hz, 1.0A) Also it has the inverter function that converts input voltage to AC Rms value for the LCD lamp. DC/DC Converter block DC/DC Converter convert the input 5V,15V to proper 3.3V, 5V, 8V, 12[...]

- 21 - WIRING DIAGRAM 5 3 4 6 6 2 6631900037A-50P-LPL 6631900037B-50P-AUO 6631T20037Q-3P 6631900024D-3P 6631T20034M-1 1P 6631T20029S-5P 6631900026A-4P 6631900026A-4P 1 INTERF ACE BOARD Only 20LC1R*_LPL Module Downloaded From TV-Manual.com Manuals[...]

- 22 - EXPLODED VIEW 010 060 020 070 080 090 100 030 140 130 120 11 0 050 040 041 Downloaded From TV-Manual.com Manuals[...]

- 23 - EXPLODED VIEW P ARTS LIST No. PART NO. DESCRIPTION 30919D0001D CABINET ASSEMBLY, 20LC1R-ZB(TITAN) BRAND 3090TKD006 C/SKD 6304FLP188A LCD(LIQUID CRYSTAL DISPLAY), LC201V02-A3KA LG PHILPS TFT COLOR PB FREE MODULE , SS D-IC 3809900002F BACK COVER ASSEMBLY, 20LC1R-ZG NON C/SKD 3043900010A TILT SWIVEL ASSEMBLY, 20LC1 NON HINGE ASSY 3043900011C TI[...]

- 24 - DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C301 0CH3224K946 0.22UF 50V Z F 2012 R/TP C307 0CH3224K946 0.22UF 50V Z F 2012 R/TP C3092 0CH3224K946 0.22UF 50V Z F 2012 R/TP C316 0CH3224K946 0.22UF 50V Z F 2012 R/TP C319 0CH3224K946 0.22UF 50V Z F 2012 R/TP C322 0CH3224K946 0.22UF 50V Z F 2012 R/TP C327 0CH3224K946 [...]

- 25 - DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C719 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C720 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C740 0CH3103K516 10000PF 50V 10% B(Y5P) 2012 C744 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C145 0CK103CK51A 0.01UF 1608 50V 10% R/TP B( C202 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R [...]

DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C359 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) C371 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) C384 0CH8106F691 10UF 16V 20% 105STD (CYL) R C385 0CH8106F691 10UF 16V 20% 105STD (CYL) R C404 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) C408 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) C410 0C[...]

DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q112 0TR162309CA KSC1623 TP SAMSUNG SOT23 N Q704 0TR162309CA KSC1623 TP SAMSUNG SOT23 N Q103 0TR390409AE FAIRCHILD KST3904(LGEMTF) T Q109 0TR390609FA FAIRCHILD KST3906-MTF TP SO Q701 0TR390409AE FAIRCHILD KST3904(LGEMTF) T Q715 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - Q301 0TR1[...]

DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R383 0RH1502D622 15K OHM 1 / 10 W 2012 5.00% R385 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R386 0RH1502D622 15K OHM 1 / 10 W 2012 5.00% R388 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R391 0RH0331D622 3.3 OHM 1 / 10 W 2012 5.00% R392 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R394 0R[...]

DATE: 2005. 09. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION X301 6202TST003G HC-49/SM5H KONY 24.576MHZ + U303 6620F00017A CCSD-32T-SM WOOYOUNG 32P PL TU701 6700VS0003H TAEW-G053P LGIT MULTI FS PH C501 0CN1040K949 "0.1UF D 50V 80%,-20% F(Y5V)" C504 0CN1040K949 "0.1UF D 50V 80%,-20% F(Y5V)" R502 0RN2201F409 2.2K OHM 1[...]

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Aug., 2005 Printed in Korea P/NO : 38289S0022C Downloaded From TV-Manual.com Manuals[...]