LG RZ-26LZ55 Service Manual
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LG RZ-26LZ55 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : ML-041A
MODEL RZ-26LZ55
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-26LZ55

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-041A MODEL RZ-26LZ55 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 26" TFT WXGA LCD Frequency range H : 31 ~ 61Khz DVI-I input V : 56 ~ 75Hz 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 All white / All black CIE Color Coordinates White Typ. 0.284 0.285 0.289 Typ. 0.285 0.293 0.303 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"32" Wide LCD TV which is Adjustment Content CMD(ASCII) VALUE(hex) Detail Explanation manufactured in Monitor Factory or is produced on the basis Mode Select 10, 20, 30, 40, 50 00 : RF(TV) 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

    4814TKK280B SHIELD, REAR POWER C/SKD 33139P2007A MAIN TOTAL ASSEMBLY, RZ-26LZ55 LPL SKD BRAND ML-041A -LF 33139P2008A MAIN TOTAL ASSEMBLY , RZ-26LZ55 AUO SKD BRAND ML-041L -LF- 3551TKK516B COVER ASSEMBLY, RZ-30LZ50 REAR NON AV C/SKD 4951TKK169J METAL ASSEMBLY, REAR RZ-26LZ50 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: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C618 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C910 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C619 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 27 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0CK334CF94A "0.33UF 1608 16V 80%,-20% F(" C354 0CH6471K416 470PF 2012 50V 5% NP0 R/TP 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C355 0CH6471K416 470PF 2012 50V 5% NP0 R/TP...
  • Page 28 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C111 0CE475EK638 4.7UF KMG 50V 20% FM5 TP 5 C543 0CH8476F691 47UF 16V 20% 105STD (CYL) R C1112 0CE108EF618 1000UF KMG 16V 20% FL TP 5...
  • Page 29 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION COIL & CORE & INDUCTOR D706 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 ZD203 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 L104 6140TBZ045A "38.5UH(DIP), 6A, P7.5, DR8."...
  • Page 30 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L201 0LC1020101A 1UH 10% 2012 R/TC FI-B2012- R104 0RH1000D622 100 OHM 1 / 10 W 2012 5.00% L306 0LC1532101A 15UH 10% 3216 R/TC FI-C3216...
  • Page 31 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R338 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R752 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R339 0RH1002D622 10K OHM 1 / 10 W 2012 5.00%...
  • Page 32 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R127 0RJ3301D677 3.3K OHM 1/10 W 5% 1608 R/T R356 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R130 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP...
  • Page 33 DATE: 2005. 09.19. DATE: 2005. 09.19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R601 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R920 0RJ4990D477 499 OHM 1/10 W 1% 1608 R/TP R602 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 34 0RN2700F409 270 1/6W 1% TA52 R1706 0RN2701F409 2.7K OHM 1/6 W 1.00% TA52 SW1700 140-313A TACT 2LEAD 100G(TA) LG C&D SW1701 140-313A TACT 2LEAD 100G(TA) LG C&D SW1702 140-313A TACT 2LEAD 100G(TA) LG C&D SW1703 140-313A TACT 2LEAD 100G(TA) LG C&D SW1704 140-313A TACT 2LEAD 100G(TA) LG C&D...
  • Page 37 Sep., 2005 P/NO : 38289S0022D Printed in Korea...

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