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LG RZ-27LZ55 Service Manual
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LG RZ-27LZ55 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : ML-041A
MODEL RZ-27LZ55
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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Summary of Contents for LG RZ-27LZ55

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-041A MODEL RZ-27LZ55 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................20 WIRING DIAGRAM ..................22 EXPLODED VIEW .................. 23 EXPLODED VIEW PARTS LIST ..............24 REPLACEMENT PARTS LIST ............... 25 SVC. SHEET ....................- 2 -...

  • Page 3: 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 Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    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.

  • Page 6: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to ML-041A chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition. (1) Temperature: 25°C ±...
  • Page 7 4. General Specification Item Specification Unit Remark Panel 27" TFT WXGA LCD Frequency range H : 31 ~ 48.363Khz DVI-I input V : 50 ~ 60Hz Control Function 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset Comoponent Jack...
  • Page 8 5. Optical Feature(LCD Module) Item Specification Remark Viewing Angle <CR 10> R/L, U/D 176,176 Luminance Luminance (cd/m2) Typical Variation MAX / MIN Contrast Ratio 1000 All white / All black CIE Color Coordinates White Typ. 0.285 Typ. 0.293 Typ. 0.6452 Typ.
  • Page 9 7. Component Video Input(Y, P Specification Proposed Resolution H-freq(kHz) V-freq(Hz) 640x480 15.73 SDTV, DVD 480i RZ, RT, RM 640x480 15.63 59.94 SDTV, DVD 480i RZ, RT, RM 704x480 31.47 59.94 EDTV 480p RT, RM 720x576 15.625 50.00 SDTV, DVD 625 Line RZ, RT 720x576 31.25...

  • Page 10: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application 3.2.5 Screen Adjustment Instructions This document is applied to 23", 26", 27", 32" Wide LCD TV Adjustment Content CMD(ASCII) VALUE(hex) Detail Explanation which is manufactured in Monitor Factory or is produced on Mode Select 10, 20, 30, 40, 50 00 : RF(TV) the basis of this data.
  • Page 11 3.4 Video signal Gain/Offset Adjustment 3.5.2 White Balance Adjustment - Apply 95% White(Model:210 576i, pattern : 47, luminance (Auto adjustment) spec : 250cd/m^2 over) signal by using Patten Generator - Execution of RF no signal during Heat Run over 30min (MSPG925FS) - Connect to the LCD TV SCART input terminal with Patten - Check whether color-coordinates(x:0.283, y:0.298,...
  • Page 12 5. Shipping Conditions Item Condition Remark Power Volume Level Main Picture Input Main Last Channel Pr 01 Mute 16 : 9 Station Auto Program Manual Program Program Edit Favorite Program None Picture Dynamic Dynamic Contrast Brightness Colour Sharpness Tint NTSC OPTION Sound Flat Balance...
  • Page 13 OPTION DATA SETTING(PAL) Option3 Item Condition Remark Option1 Language 0 : Eng Only 1 : EU5 SideAV 0 : SideAV Off 1 : SideAV On 2 : 12 nations (Europe) SCART 0 : SCART Off 3 : Eng + Chinese 4 : Eng + Arab + Urdu 1 : SCART On 0 : PC Off...

  • Page 14: 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 15: Troubleshooting

    TROUBLESHOOTING No power :[A]Process (LED indicator off) Check short of main B/D Check 24V or 12V or Change Power B/D Fail of Power B/D Pass Check Output of Change L3, L1300 Fail L3, L1300 Pass Check Output of Change L808,L809 Change IC1300,IC4 or IC8 IC1300, IC4 or IC8 (F801,F802)
  • Page 16 No Raster :[B]Process Check LED Status Repeat A PROCESS on display unit Fail Pass Check L900,L901 Change L900,L901, L902,L903 L902,L903 Fail Pass Check the input/ Change IC901 Output of IC901 Fail Pass Change inverter Check inverter Connector or inverter connector or inverter Fail Pass Check panel link...
  • Page 17 No Raster on Component signal Repeat [A] Process Pass Check the signal of Change Q310,Q315,Q316 Q310,Q315,Q316 Fail Pass Re-soldering or Check the input/ Change the defect part Fail output of IC1 Re-soldering or Check the input/output Change the defect part Fail of IC500, IC600 Pass...
  • Page 18 No Raster on AV Signa No Raster on TV(RF) signal (Video1,Video2, 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 C316,C317, C316,C317,Q308,Q313 Q308,Q313 Fail...
  • Page 19 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 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 20: Block Diagram

    BLOCK DIAGRAM - 20 -...
  • Page 21 BLOCK DIAGRAM DESCRIPTION 1. Video control and display data Video signal is received from TUNER, AV port(AV1,AV2,S-Video,Component) and goes to the one-chip video decoder (VCTI) which separate the R,G,B signal and passes on the signal to AD converter(AD9883) which converts 4:4:4 video format into digital and gives output to the Picture Enhancer(FLI2300).This picture enhancer improves the quality of the picture by changing the level of RGB signals.The output of this enhancer chip is fed to the deinterlacer ,which in turn goes to the Scalar (GM5221).The scalar gives the output on the LVDS cable which is connected to LCD module.

  • Page 22: Wiring Diagram

    - 22 -...

  • Page 23: Exploded View

    - 23 -...

  • Page 24: Exploded View Parts List

    PCB Assembly,Sub, RZ-26LZ50 IR SUB TOTAL BRAND -LF- 4814TKK280A Plate, PRESS SPTE T0.3 REAR POWER 33139P2020A Main Total Assembly, CMO ML-041A LF RZ-27LZ55 BRAND 3551TKK516L Cover Assembly, RZ-32LZ50 LGEMA PHANTOM REAR A/V ASSY PHONE 3551TKK516B Cover Assembly, RZ-30LZ50 REAR NON AV C/SKD...

  • Page 25: 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 26 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C107 0CK225DFK4A C2012Y5V1C225MT 2200000p 20 C505 0CH3104K566 0805B104K500CT 100000p 10% C109 0CH3103K516 C2012Y5P1H103KT 10000p 10% C506 0CH3104K566 0805B104K500CT 100000p 10% 0CH3104K566...
  • Page 27 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C619 0CH3104K566 0805B104K500CT 100000p 10% C866 0CH3104K566 0805B104K500CT 100000p 10% C620 0CH3104K566 0805B104K500CT 100000p 10% C867 0CH3104K566 0805B104K500CT 100000p 10% C621...
  • Page 28 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C116 0CK562CK51A C1608Y5P1H562KT 5600p 10% 5 C602 0CC220CK41A C1608C0G1H220JT 22p 5% 50V C117 0CK562CK51A C1608Y5P1H562KT 5600p 10% 5 C603 0CC220CK41A C1608C0G1H220JT 22p 5% 50V...
  • Page 29 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION COIL & CORE & INDUCTOR D701 0DZ510009EE UDZS5.1B 5100MV 4.98TO5.2V D702 0DZ510009EE UDZS5.1B 5100MV 4.98TO5.2V L104 6140TBZ045A 38.5uH - - 13.5X20MM LEAD D705...
  • Page 30 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0LC1032101A FI-C3216-103KJT 10UH 10% - R1105 0RH1001D622 MCR10EZHJ102 1KOHM 5% 1/8W L1300 6140VR0008B SLF12575T-150M4R7 15UH 20% R1106 0RH1202D622 MCR10EZHJ123 12KOHM 5% 1/8W...
  • Page 31 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R354 0RH1002D622 MCR10EZHJ103 10KOHM 5% 1/8W R805 0RH0752D622 MCR10EZHJ750 75OHM 5% 1/8W R355 0RH1002D622 MCR10EZHJ103 10KOHM 5% 1/8W R806 0RH4700D622 MCR10EZHJ471 470OHM 5% 1/8W...
  • Page 32 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R157 0RJ2700D677 MCR03EZPJ271 270OHM 5% 1/10 R4027 0RJ3001D677 MCR03EZPJ302 3KOHM 5% 1/10W R159 0RJ2700D677 MCR03EZPJ271 270OHM 5% 1/10 R4032 0RJ4700D677 MCR03EZPJ471 470OHM 5% 1/10...
  • Page 33 DATE: 2006. 03.03. DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R718 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 R940 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 R942 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10...
  • Page 34 DATE: 2006. 03.03. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LED&P/SW BOARD C1600 0CN1040K949 CH UP050 F104Z-B-B Z 100000 L1600 0LA0102K119 LAL02TB100K 10UH 10% - 160M Q1601 0TR319809AA KTC3198 NPN 5V 60V 50V 150M Q1602 0TR319809AA KTC3198 NPN 5V 60V 50V 150M Q1603 0TR319809AA KTC3198 NPN 5V 60V 50V 150M...
  • Page 37 Mar., 2006 P/NO : MFL30105501 Printed in Korea...

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