LG RT-32LZ50 Service Manual
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LG RT-32LZ50 Service Manual

LG RT-32LZ50 Service Manual

Chassis : ml-041a
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LCD TV

SERVICE MANUAL

CHASSIS : ML-041A
MODEL : RT-32LZ50/RT-32LZ50W
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
*To apply the Hotel Mode.

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Summary of Contents for LG RT-32LZ50

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-041A MODEL : RT-32LZ50/RT-32LZ50W CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the Hotel Mode.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 TIMING CHART ..................10 ADJUSTMENT INSTRUCTION..............11 HOTEL MODE..................15 TROUBLE SHOOTING ................18 BLOCK DIAGRAM...................23 WIRING DIAGRAM ..................25 EXPLODED VIEW .................. 26 EXPLODED VIEW PARTS LIST ..............27 REPLACEMENT PARTS LIST ............... 28 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 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(Monitor) Item Specification Unit Remark Panel 32” 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 5.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. 0.285 Typ. 0.293 Typ. 0.640 Typ. 0.341 Green Typ. 0.287 Typ. 0.610 Blue Typ.
  • Page 9 7.Component Video Input(Y, P Resoluton H-freq(kHz) V-freqHz) Pixel clock Proposed 640 x 480 15.73 60.00 SDTV. DVD 480i RZ, RT, RM 640 x 480 15.63 59.94 SDTV. DVD 480i RZ, RT, RM 704 x 480 31.47 59.94 EDTV 480p RT, RM 720 x 576 15.625 50.00...

  • 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 Polarity Sort 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 2. Adjustment 00 00 FF FF FF FF FF FF 00 1E 6D 45 75 01 01 01 01 10 00 0E 01 03 01 40 26 78 08 B1 DA A1 56 48 98 24 20 13 48 4B A1 08 00 31 40 01 01 01 01 45 40 01 01 2.1 PC Auto Gain/Offset adjustment...
  • 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 Picture Dynamic 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: 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: 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 16 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 17 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 18: 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 19 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 20 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 21 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 22 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 23: Block Diagram

    BLOCK DIAGRAM LA7222C - 23 -...
  • Page 24 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 25: Wiring Diagram

    - 25 -...

  • Page 26: Exploded View

    - 26 -...

  • Page 27: Exploded View Parts List

    CABINET ASSEMBLY, RT-32LZ50 BRAND 3090TKE014 . 3091TKE019C CABINET ASSEMBLY, RZ-32LZ50 BRAND 3090TKE014 SKD 6304FLP163A LCD(LIQUID CRYSTAL DISPLAY), LC320W01-A6 LG PHILPS TFT COLOR WXGA, 16:9, 500NITS, 16MS, 8BIT, LVDS 3809TKE018B BACK COVER ASSEMBLY, RT-32LZ50 . . 3809TKE018L BACK COVER ASSEMBLY, RT-32LZ50,AHPLKGA 3808TKE014 SET AUSTRALIA...

  • Page 28: 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 29 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C526 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C640 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C527 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 30 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C936 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C752 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C938 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 31 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C231 0CH8106J691 10UF 35V 20% 105STD (CYL) R/ IC754 0DRSE00018A SRV05-4.TC SEMTECH R/TP SOT2 C232 0CH8106J691 10UF 35V 20% 105STD (CYL) R/...
  • Page 32 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC800 0IPRPNP001A "SM5301BS(ATSC DTV) NPC 28P,H" L850 6210TCE001G HH-1M3216-501 CERATEC 3216MM IC901 0IPRPGN014A GM5221H(HDCP) GENESIS 208P Q L900 6210TCE001G HH-1M3216-501 CERATEC 3216MM...
  • Page 33 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R106 0RH1500D622 150 1/10W 5 D.R/TP R738 0RH4701D622 4.7K 1/10W 5 D.R/TP R107 0RH1503D622 150K 1/10W 5 D.R/TP R755 0RH0102D622...
  • Page 34 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R343 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R125 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R348 0RH1002D622 10K OHM 1 / 10 W 2012 5.00%...
  • Page 35 DATE: 2004. 10. 11. DATE: 2004. 10. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R357 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R701 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R358 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP...
  • Page 36 R1606 0RD1500Q609 150 1/4W(3 5% TA52 R952 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP SW1600 140-313A TACT 2LEAD 100G(TA) LG C&D N R953 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP LED1600 0DLBE0128AA BRIGHT LED ELECTRONICS BL-BU 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 39 Jan., 2005 P/NO : 3828TSL108X Printed in Korea...

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