LG RT-23LZ55 Service Manual
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LG RT-23LZ55 Service Manual

LG RT-23LZ55 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : ML-041A
MODEL : RT-23LZ55 / RZ-23LZ55
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 RT-23LZ55

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-041A MODEL : RT-23LZ55 / RZ-23LZ55 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 ..................23 EXPLODED VIEW .................. 24 EXPLODED VIEW PARTS LIST ..............25 REPLACEMENT PARTS LIST ............... 27 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 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 4. General Specification Item Specification Unit Remark Panel 23" 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 All white / All black CIE Color Coordinates White Typ. 0.255 0.285 0.315 Typ. 0.263 0.293 0.323 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 Adjustment Content CMD(ASCII) VALUE(hex) Detail Explanation is manufactured in Monitor Factory or is produced on the Mode Select 10,20,30,40,50 10 : RF(TV) basis of this data.
  • Page 11 3.4.2 White Balance Adjustment 3.7 Component signal Gain/Offset Adjustment - Apply 95% White (Model : 202 PAL_BDGH, pattern : 47, - RT-23LZ55 (Auto adjustment) luminance spec : 250cd/m^2 over) signal by using Patten - Execution of RF no signal during Heat Run over 30min...
  • Page 12 [RT-23LZ55] <DDC DATA Digital Set> <DDC DATA Analog Set> FF FF FF FF FF FF 00 1E 6D 07 01 01 FF FF FF FF FF FF 00 1E 6D 08 01 01 01 03 01 40 78 08 B1 DA A1...
  • 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 (RZ-23LZ55) - 20 -...
  • Page 21 BLOCK DIAGRAM (RT-23LZ55) - 21 -...
  • Page 22 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 23: Wiring Diagram

    - 23 -...

  • Page 24: Exploded View

    - 24 -...

  • Page 25: Exploded View Parts List

    6304FLP283A LCD(LIQUID CRYSTAL DISPLAY), LC230W02-A5K4 LG PHILPS TFT COLOR INVERTER RESET CIRCUIT ADDITION or 6304FLP232A LCD(LIQUID CRYSTAL DISPLAY), LC230W02-A5K3 LG PHILPS TFT COLOR LEAD FREE, WXGA, 16:9, 500NITS, 25MS, LVDS 3809TKE024L BACK COVER ASSEMBLY, RT-23LZ55 3808TKE017 HB, RS232C, NO SPRAY...

  • Page 26: Exploded View Parts List

    CABINET ASSEMBLY, RZ-23LZ55 BRAND 3090TKE016 EU, C/SKD 6304FLP283A LCD(LIQUID CRYSTAL DISPLAY), LC230W02-A5K4 LG PHILPS TFT COLOR INVERTER RESET CIRCUIT ADDITION or 6304FLP232A LCD(LIQUID CRYSTAL DISPLAY), LC230W02-A5K3 LG PHILPS TFT COLOR LEAD FREE, WXGA, 16:9, 500NITS, 25MS, LVDS 3809TKE024A BACK COVER ASSEMBLY, RZ-23LZ50 3808TKE017 16-9 3809TKE024T...

  • Page 27: 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 28 0.1UF 50V 10% X7R 2012 R/TP - RZ-23LZ55 0CK334CF94A "0.33UF 1608 16V 80%,-20% F(" C908 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R - RT-23LZ55 C909 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP 0CK334CF94A "0.33UF 1608 16V 80%,-20% F(" C910 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 29 15PF 2012 50V 5% NP0 R/TP C4009 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP - RZ-23LZ55 C333 0CH6150K416 15PF 2012 50V 5% NP0 R/TP - RT-23LZ55 C4010 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP - RZ-23LZ55 C336 0CH6150K416 15PF 2012 50V 5% NP0 R/TP...
  • Page 30 10UF 35V 20% 105STD (CYL) R C805 0CE227WF6DC 220UF MVK 16V 20% R/TP(SMD) C201 0CH8106F691 10UF 16V 20% 105STD (CYL) R - RT-23LZ55 C806 0CE227WF6DC 220UF MVK 16V 20% R/TP(SMD) C202 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 - RZ-23LZ55...
  • Page 31 HB-1S2012-080JT CERATEC 2012 - RZ-23LZ55 IC505 0IPMGSG020A "LD1117DT18TR,LF SGS-THOMSON" L210 6210TCE001A HB-1S2012-080JT CERATEC 2012 - RZ-23LZ55 0IPMGSG018D LD1086DT18TR-LF SGS-THOMSON L211 6210TCE001A HB-1S2012-080JT CERATEC 201 - RT-23LZ55 IC601 0IPMGK2001B AIC1117A-33PYTR(BS33) AIC 3 L212 6210TCE001A HB-1S2012-080JT CERATEC 201 - RT-23LZ55 - 31 -...
  • Page 32 15K OHM 1 / 10 W 2012 5.00% Q212 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - R128 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% - RT-23LZ55 Q300 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - R129 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% - RT-23LZ55...
  • Page 33 680 OHM 1 / 10 W 5% D R/TP R974 0RH4701D622 4.7K OHM 1 / 10 W 2012 5.00 R4100 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D - RT-23LZ55 R976 0RH4701D622 4.7K OHM 1 / 10 W 2012 5.00 R4101 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D - RT-23LZ55...
  • Page 34 DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R105 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP - RT-23LZ55 R224 0RJ4702D677 47000 OHM 1/10 W 5% 1608 R/ - RT-23LZ55 R108 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 35 470 OHM 1/10 W 5% 1608 R/TP - RZ-23LZ55 R711 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP R444 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP - RT-23LZ55 R717 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R445 0RJ0000D677...
  • Page 36 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R1604 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP - RT-23LZ55 R1605 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% R950 0RJ1000D677...
  • Page 39 Aug., 2005 P/NO : 38289S0004V Printed in Korea...

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Rz-23lz55

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