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LG RM-26LZ50 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : ML-041A
MODEL:RM-26LZ50, RM-26LZ50C
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 RM-26LZ50

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-041A MODEL:RM-26LZ50, RM-26LZ50C 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 TIMING CHART ..................10 ADJUSTMENT INSTRUCTION..............11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................21 WIRING DIAGRAM ..................23 EXPLODED VIEW .................. 24 EXPLODED VIEW PARTS LIST ..............25 REPLACEMENT PARTS LIST ............... 26 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 X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or NOTE: If unforeseen circumstances create conflict between the exposure of the assembly.
  • 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 5.General Specification(Monitor) Item Specification Unit Remark Panel 26” TFT WXGA LCD Frequency range DVI-I input H:31 ~ 61KHz, V: 56 ~ 75Hz 1) Contrast/ Brightness Control function 2) H- Position/ V-Position 3) Tracking : Clock/Phase 4) Auto Configure 5) Reset 1: Y Component Jack 3: Pb...
  • Page 8 6.Optical Feature(LCD Module) Item Specification Remark Viewing Angle R/L, U/D 176,176 <CR 10> Luminance Luminance(cd/ ) Typical Variation MAX/MIN Contrast Ratio ALL white/All back CIE Color Coordinates WHITE Typ. 0.284 0.285 Typ. 0.295 0.293 Typ. Typ. Green Typ. Typ. Blue Typ.
  • Page 9 8.PC Input Mode Resoluton H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed DVI-PC, Analog RGB 640 x 480 31.469 59.94 25.17 VESA(VGA) 640 x 480 30.24 VESA(VGA) 640 x 480 37.500 75.00 31.50 VESA(VGA) 800 x 600 35.156 56.25 36.00 VESA(SVGA) 800 x 600 37.879 60.31 40.00...

  • Page 10: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Period Back Porch Video Active Time Front Porch Sync Duration Sync Mode Resolution Frequency Clock Sort Polarity 31.469 25.175 640x480 –...

  • Page 11: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Object 2.2.1 EDID DATA [DDC DATA Analog] This instruction is for the application to the LCD TV. 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00 FF FF FF FF FF FF 00 1E 6D FF 55 01 01 01 01 2.
  • Page 12 3. Shipping Conditions ITEM CONDITION REMARK Power Volume Level Main Pcture Input Main Last Channel Pr 01 Mute 16:9 Station Auto Program Manual Program Program Edit Favorite Program None Dynamic Picture Dynamic Contrast Brightness Colour Sharpness NTSC OPTION Tint Sound Flat Balance Special...
  • Page 13 *Option(PAL) ITEM CONDITION REMARK ITEM CONDITION REMARK Option 1 Option 3 Side AV 0: Side AV Off Language 0: Eng Only 1: Side AV On 1: EU5 SCART 0: SCART Off 2: 12 nations(Europe) 1: SCART On 3: Eng + Chines 0: PC Off 4: Eng + Arab + Urdu 1: PC On...
  • Page 14 EDID ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.

  • Page 15: Svc Remocon

    SVC REMOCON 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. MUTE To check TV screen image easily.

  • Page 16: 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 L3, L1300 Fail Pass Check Output of Change L808,L809 Change IC1300,IC4 or IC8 IC1300, IC4 or IC8 (F801,F802)
  • 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 Change inverter Check 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 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 19 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 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 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 LA7222C - 21 -...
  • Page 22 BLOCK DIAGRAM DESCRIPTION 1. Video controller unit and display data conversion unit The video controller unit receives the video signal inputted to the tuner, AV port (AV1, AV2, S-Video and component) and converts it to the analog RGB signal through the microcomputer (VCTI) combined with the video decoder that integrates various functions in one chip.

  • Page 23: Wiring Diagram

    - 23 -...

  • Page 24: Exploded View

    - 24 -...

  • Page 25: Exploded View Parts List

    CABINET ASSEMBLY, RM-26LZ50 BRAND 3090TKE006A 40AF 86867-RM-26LZ50 3091TKE013H CABINET ASSEMBLY, RM-26LZ50C BRAND 3090TKE006A 40AF SILVER-RM-26LZ50C 6304FLP118B LCD(LIQUID CRYSTAL DISPLAY), LC260W01-A5K5 LG PHILPS TFT COLOR WXGA,450NIT,LVDS,LG INNOTECK INVERTER 6304FAU020A LCD(LIQUID CRYSTAL DISPLAY), T260XW01 AU TFT COLOR WXGA,MVA 600NITS 25MSS 16 CCFL LVDS 3809TKE013D...

  • 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: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C528 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CK106EF56A 10UF 3216 16V 10% X7R R/TP C529 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CH3104K566...
  • Page 28 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C939 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CK106EF56A 10UF 3216 16V 10% X7R R/TP C940 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CK104CK56A...
  • Page 29 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C301 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) D102 0DS181009AA KDS181 TP KEC SOT-23 80V 3 C302 0CH8106F691 10UF 16V 20% 105STD (CYL) R/ D103...
  • Page 30 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0IMCRFA015A KA7805R FAIRCHILD 2P D-PAK R L309 0LC1532101A 15UH 10% 3216 R/TC FI-C3216- IC905 0IPMGFA061A "FAN1587AD33X FAIRCHILD 3P,DP" L310 0LC1532101A 15UH 10% 3216 R/TC FI-C3216-...
  • Page 31 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R126 0RH1502D622 15K 1/10W 5 D.R/TP 0RH1000D622 100 1/10W 5 D.R/TP R132 0RH1003D622 100K 1/10W 5 D.R/TP R850 0RH4701D622 4.7K 1/10W 5 D.R/TP...
  • Page 32 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R363 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% D 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R367 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% D...
  • Page 33 DATE: 2004. 06.18. DATE: 2004. 06.18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R759 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP 0RJ1000D677...
  • 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 N SW1701 140-313A TACT 2LEAD 100G(TA) LG C&D N SW1702 140-313A TACT 2LEAD 100G(TA) LG C&D N SW1703 140-313A TACT 2LEAD 100G(TA) LG C&D N SW1704 140-313A TACT 2LEAD 100G(TA) LG C&D N...
  • Page 35 Date: 2004. 05. 07 P/No.:3854TP3001A...
  • Page 36 Date: 2004. 05. 07 P/No.:3854TP3001A...
  • Page 37 Jun., 2004 P/NO : 3828TSL103S Printed in Korea...

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