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LG 20HIZ11 Service Manual

Chassis: ml-041f
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  • Page 2 LCD TV SERVICE MANUAL CHASSIS : ML-041F FACTORY NAME : RZ-20LZ50C MODEL : 20HIZ11 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 3: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 SVC REMOCON..................11 HOTEL MODE..................12 TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................20 WIRING DIAGRAM ..................22 EXPLODED VIEW .................. 23 REPLACEMENT PARTS LIST ............... 25 SVC. SHEET ....................- 2 -...

  • Page 4: Product Safety

    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 X-RADIATION, Shock, Fire, or other Hazards.
  • Page 5 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 6 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.

  • Page 7: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to ML-041F chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition. (1) Temperature: 25°C ±...
  • Page 8 4. Feature and Function Item Specification Remark Teletext TOP, FLOF Top(option) REMOCON NEC Code PAL/ NTSC AV Input Rear S-Video Input Rear Component input PERI TV Connector Full SCART : 1 Rear Ear-phone output RJ-12 Only Commercial Model(SI-Box interface) Discrete IR 2 Carrier Stereo BG, DK NICAM Stereo...
  • Page 9 7. Outgoing Condition Item Condition Remark Power Volume Level Main Picture Input Main Last Channel Pr 01 Mute Clear Station Auto Program Manual Program Program Edit Favorite Program None Picture Dynamic Dynamic Contrast Brightness Colour Sharpness Tint NTSC OPTION Sound Flat Balance Special...
  • Page 10 9. Preset CH information Sound PIF[MHz] SYSTEM Video 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...

  • Page 11: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 3.2.3 Low Gray Adjustment 1. Application Object This document is applied to 20" LCD TV which is Apply Gray-Level(Model : 202 PAL_BDGH, pattern : 59) manufactured in Monitor Factory or is produced on the basis signal by using Pattern Generator(MSPG-925FS) of this data.

  • Page 12: Svc Remocon

    SVC REMOCON FUNTION REAMARK To turn the TV on or off POWER To turn the TV on automatically if the power is supplied to the TV. (Use the POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function.

  • Page 13: Hotel Mode

    1.1. Channel Menu Display - Decide to enter 'Channel Menu' or not in the 'Main Menu' by setting 'Channel Menu Display' as Yes(Enter Possible) or No(Enter Impossible) on the "LG Hotel Mode" OSD. 1.2. Channel Change - Decide to change channel or not by setting 'Channel Change' as Yes(Change Possible) or No(Change Impossible) when present source is TV.
  • Page 14 1.3. Input Source Change - Decide to change input source or not by setting 'Input Source Change' as Yes(Change possible) or No(Change impossible). - When 'Input Source Change' is set to No(Change impossible), TV/AV key and Multimedia key doesn't work, and entering 'Input' item in the 'Main Menu OSD' is impossible.
  • Page 15 1.10. Channel - Decide to turn on TV as set channel or last memorized channel or not by setting 'Channel' as On(Work) or Off(Do Not Work). - When 'On Monitor Operation' is set to Yes(Work), then user can enter 'Channel' and set the value. - When 'On Monitor Operation' is set to On(Work), setting 'Channel' value of ''On Monitor Operation' is possible and TV always turns on as set 'Channel' value.

  • Page 16: 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 Q1100 Fail Q1100 Pass Check Output of Change IC1107, IC1104 IC1107, IC104 Fail Pass Change LED Assy Check LED Assy...
  • Page 17 No Raster :[B]Process Check LED Status Repeat A PROCESS on display unit Fail Check L900,L901 Change L900,L901, L902,L903 L902,L903 Fail Pass Check the input/ Change IC901 Output of IC901 Fail Pass Check inverter Change inverter Connector or inverter connector or inverter Fail Pass Change panel link...
  • Page 18 No Raster on Component signal Repeat [A] Process Pass Check the signal of Check JA1200 or L1200, L1202, L1203 RCA CABLE Fail Pass Re-soldering or Check the input/ Change the defect part, Fail output of IC1 Check X11 Re-soldering or Check the input/output Change the defect part Fail...
  • Page 19 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 [A] Process TU1000 Fail Fail Change the defect part Pass Check the signal of Change L1209, L1210, L1209, L1210, L1212 L1212 Fail...
  • Page 20 No Sound Check the Change source input input source Fail Pass Re-soldering or Check the input/output Change the defect part of IC1 Fail Check X11 Pass Re-soldering or Check the input/output Change the defect part of IC100,IC101 Fail Pass Check the speaker Change speaker Fail Pass...

  • Page 21: Block Diagram

    BLOCK DIAGRAM - 20 -...
  • Page 22 BLOCK DIAGRAM DESCRIPTION 1. Video Controller Unit & Display Data Conversion Unit The video controller unit receives the video signals inputted through the tuner, AV port (AV1, AV2, S-Video, SCART), and converts them into an analog RGB signal through the microcomputer (VCTI) combined with the video decoder that integrates various functions in one chip.

  • Page 23: Wiring Diagram

    - 22 -...

  • Page 24: Exploded View

    EXPLODED VIEW - 23 -...
  • Page 25 CABINET ASSEMBLY, RZ-20LZ50 BRAND 3090TKD004A LGEMA PHANTOM 3091TKD006A CABINET ASSEMBLY, RZ/RT-20LZ50 BRAND 3090TKD004A SET 6304FLP188A LCD(LIQUID CRYSTAL DISPLAY), LC201V02-A3KA LG PHILPS TFT COLOR PB FREE MODULE , SS D-IC 6304FLP139A LCD(LIQUID CRYSTAL DISPLAY), LC201V02-A3K3 LG PHILPS TFT COLOR 20.1" VGA,IPS,450NITS,LVDS 3809TKD006Z...

  • Page 26: Replacement Parts List

    REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN, CH : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit in the CQ : Polyestor RS : Metal Oxide Film P/No. means as follows; CE : Electrolytic RN : Metal Film CF : Fixed Film RH : CHIP, Metal Glazed(Chip)
  • Page 27 DATE: 2005. 10. 12. DATE: 2005. 10. 12. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 0CH6102K406 1000PF 50V 5% SL 2012 R/TP C1225 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 28 DATE: 2005. 10. 12. DATE: 2005. 10. 12. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) L1103 6210TCE001A HB-1S2012-080JT CERATEC 201 0CH8106F691 10UF 16V 20% 105STD (CYL) R L1105 6210TCE001G HH-1M3216-501 CERATEC 3216M...
  • Page 29 DATE: 2005. 10. 12. DATE: 2005. 10. 12. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1206 0RH0752D622 75 OHM 1 / 10 W 2012 5.00% R915 0RH3600D622 CHIP 360-J 1/10 W R1217 0RH4703D622 470K OHM 1 / 10 W 2012 5.00...
  • Page 30 R2208 0RN2000F409 200 1/6W 1% TA52 R889 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP SW2200 140-313B TACT 2LEAD 160G(TA) LG C&D R890 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP SW2201 140-313B TACT 2LEAD 160G(TA) LG C&D R901 0RJ0472D677...
  • Page 31 DATE: 2005. 10. 12. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R2106 0RH1000D622 100 OHM 1 / 10 W 2012 5.00% R2111 0RH4301D622 4.3K OHM 1 / 10 W 2012 5.00 LED2100 0DL200000CA SAM5670(DL-2LRG) BK Y-GREEN PA2101 6712000013A TSOP4438SO1 VISHAY 38KHZ AN VIDEO BOARD C1200...
  • Page 34 Oct., 2005 P/NO : 38289S0022Q Printed in Korea...

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