LG RZ-20LZ55C Service Manual
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LG RZ-20LZ55C Service Manual

LG RZ-20LZ55C Service Manual

Chassis: ml-041f
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  • Page 2 Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : ML-041F MODEL : 20HIZ12 RZ-20LZ55C CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 3: Table Of Contents

    TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................20 WIRING DIAGRAM ..................22 EXPLODED VIEW .................. 23 REPLACEMENT PARTS LIST ............... 25 SVC. SHEET ....................- 2 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 Good Earth Ground such as WATER PIPE, CONDUIT etc. To Instrument’s 0.15uF exposed METALLIC PARTS 1.5 Kohm/10W - 3 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 - 4 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. - 5 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Contents

    Glare, Hard Coating (3H) Operating Mode Normally Black Black Light Unit 6CCFL(6 lamps) Typ. 16ms(R.T : 7/10ms + F.T. : 18/20ms) - 6 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 @ @ @ @ ( M h f @ @ @ 0 Y h f @ 0 M h g ITEM Specification Remark - 7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 Green Typ. 0.289 0.276 0.29 Typ. 0.583 0.601 0.61 Blue Typ. 0.143 0.142 0.14 Typ. 0.909 0.075 0.07 - 8 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 C 07 PR 45 327.25 PAL-D STEREO FLOF S 24 PR 46 615.25 PAL-B NICAM STEREO FLOF C 39 - 9 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Adjustment Instruction

    @ @ @ @ @ @ @ @ @ @ @ @ g @ @ @ @ @ @ @ @ @ @ @ @ g and completes the process. - 10 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Svc Remocon

    Used as Mode in the teletext mode To select the simultaneous screen TILT To adjust screen tilt Shortcut keys To manually select the channel. - 11 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Hotel Mode

    - When 'Channel Change' is set to No(Change Impossible), entering 'Channel Menu' in the 'Main Menu' OSD is impossible regardless of 'Channel Menu Display' item. - 12 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 - When 'On Monitor Operation' is set to No(Do Not Work), TV will be turned on as last memorized channel or input source. - 13 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Volume Volume Level 0 ~ 100 Channel Channel Number 0 ~ 99 Auto Off Operation Hotel Mode Operation - 14 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting

    Change IC1107, IC1104 IC1107, IC104 Fail Pass Change LED Assy Check LED Assy Fail Pass Check P1100, P210 Connector - 15 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check panel link cable or module Fail Cable or module Pass Check input source cable and jack Change module Fail - 16 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 Check the input/ Change the defect part, output of IC901 Fail Check X900 Pass Check input source cable and jack - 17 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 Check the input/output Change the defect part of IC901 Fail Check X900 Pass Check input source cable and jack - 18 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Change the defect part of IC100,IC101 Fail Pass Check the speaker Change speaker Fail Pass Check the speaker wire - 19 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Block Diagram

    BLOCK DIAGRAM - 20 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 12V power is used for the LCD panel power, and 5V power is converted to 3.3V and 1.8V power through the regulator, which in turn supplies electrical power for ICs such as VCTI and scaler. - 21 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM - 22 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 MEMO - 23 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Exploded View

    EXPLODED VIEW - 24 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Cover Assembly RZ-20LZ50 BRAND 3090TKD004A LGEMA PHANTOM EAJ30338001 LCD,Module-TFT LC201V02-SDA1 VGA P7 Module(0RT-Pol., NEC D-IC TTL/Mini LVDS) LPL 3809900121C Cover Assembly RZ-20LZ55C ML-041H 20” SET,RZ-20LZ55C(SPEAKER OUT) COMMERCIAL 3809900121E Cover Assembly RZ-20LZ55C ML-041F 20” C/SKD,RZ-20LZ55C(SPEAKER OUT) COMMERCIAL 3043TKK180C Base Assembly RZ/RT/RM-20LA80 NON STAND ASSY...

  • Page 27: Replacement Parts List

    C2012Y5V1H104ZT 100nF -20TO+80% 50V Y5V -30 C141 0CE475VK6DC VGV475M050S0ANC010 4.7uF 20% 50V 23MA -40TO C1152 0CE107EK638 KMG5.0TP50VB100M 100uF 20% 50V 229MA -55TO+ Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 26 - Only for training and service purposes...
  • Page 28 C2012Y5V1H104ZT 100nF -20TO+80% 50V Y5V -30 0CH3104K946 C2012Y5V1H104ZT 100nF -20TO+80% 50V Y5V -30 C910 0CH3104K946 C2012Y5V1H104ZT 100nF -20TO+80% 50V Y5V -30 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...
  • Page 29 2SC3875S(ALY) NPN 5V 60V 50V 150MA 100NA 70 D103 0DS181009AA KDS181 1.2V 85V 300MA 2A 4NSEC 150MW SOT23 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 28 - Only for training and service purposes...
  • Page 30 R113 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R/TP ROH R137 0RH8202D622 MCR10EZHJ823 82KOHM 5% 1/8W 2012 R/TP ROHM Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...
  • Page 31 MCR03EZPJ470 47OHM 5% 1/10W 1608 R/TP ROHM 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 2012 R/TP ROHM R902 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 R/TP ROHM Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 30 - Only for training and service purposes...
  • Page 32 Filter,Bead HB-1S2012-080JT 8OHM 2X1.25X1MM RR10 0RH0222D622 MCR10EZHJ220 22OHM 5% 1/8W 2012 R/TP ROHM L2101 6210TCE001A Filter,Bead HB-1S2012-080JT 8OHM 2X1.25X1MM Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...
  • Page 33 KPT-1115AM 1C1P 12VDC 0.05A HORIZONTAL 160G SW2205 140-313B KPT-1115AM 1C1P 12VDC 0.05A HORIZONTAL 160G SW2206 140-313B KPT-1115AM 1C1P 12VDC 0.05A HORIZONTAL 160G Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 32 - Only for training and service purposes...
  • Page 34 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 Aug., 2007 P/NO : Printed in Korea...

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