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LG 32LC2D Service Manual
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LG 32LC2D Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LA51D
FACTORY NAME : 32LC2D-UD/37LC2D-UD
MODEL : 32LC2D/37LC2D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
e-mail:http://www.LGEservice.com/techsup.html
R
website:http://biz.LGservice.com

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Summary of Contents for LG 32LC2D

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LA51D FACTORY NAME : 32LC2D-UD/37LC2D-UD MODEL : 32LC2D/37LC2D 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...................22 WIRING DIAGRAM ..................23 EXPLODED VIEW .................. 24 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 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

    5) CADTV : 01~135 Input Voltage 1) AC 100 ~ 240V 50/60Hz DU-37LZ55 : 120V, 60Hz Market NORTH AMERICA Screen Size 32 inch Wide For 32LC2D 37 inch Wide Aspect Ratio 16:9 Tuning System LCD Module LC320W01-SL11 For 32LC2D LC370WX1-SL11...
  • Page 7 5. Chroma & Brightness 5.1 FOR 32LC2D-UD CONDITION : EZ-Picture "Normal" Item Unit Remark White peak brightness cd/m HDMI input, full white Contrast Ratio 600:1 800:1 Brightness uniformity Refer to LCD SPEC. Color coordinate 0.640 +/- 0.03 0.341 +/- 0.03 GREEN 0.287...
  • Page 8 6. Component Video Input (Y, CB/PB, CR/PR) Specification Proposed Resolution H-freq(kHz) V-freq(Hz) Pixel clock 720*480 15.73 SDTV ,DVD 480I 720*480 15.73 59.94 SDTV ,DVD 480I 720*480 31.50 SDTV 480P 720*480 31.47 59.94 SDTV 480P 1280*720 45.00 60.00 HDTV 720P 1280*720 44.96 59.94 HDTV 720P...
  • Page 9 HDTV 720P 1280*720 44.96 59.94 HDTV 720P 1920*1080 33.75 60.00 HDTV 1080I 1920*1080 33.72 59.94 HDTV 1080I 9. Mechanical specification <32LC2D> Item Content Remark Product Dimenson Width(W) Length(D) Height(H) Before Packing With Stand After Packing Product Weight Only SET 22Kg...

  • Page 10: Adjustment Instruction

    4-2. EDID DATA for LA51D If you turn on a still screen more than 20 minutes (Especially [32LC2D] Digital pattern, Cross Hatch Pattern), an afterimage may EDID for HDMI 1 (DDC (Display Data Channel) Data) occur in the black level part of the screen.
  • Page 11 EDID DATA for RGB 5. MST9883-Set Adjustment EDID table = 5-1. Synopsis 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F MST9883-Set adjustment to set the black level and the Gain 00 00 FF FF FF FF FF FF 00 1E 6D 5D 46 01 01 01 01 of optimum with an automatic movement from the analog =>...
  • Page 12 6. Adjustment of White Balance 7. Video(uPD) 6-1. Required Equipment 7-1. Required Equipment (1) Color analyzer (CA-110, CA-210 or similar product) MSPG925FA Pattern Generator-connector with Video Input (2) Automatic adjustor (with automatic adjustment hour 7-2. MSG925FA Adjustment necessity and the RS-232C communication being possible) (3) Pattern Generator(MSPG-925FA): DVI Output (1) After select the model, input the #201(NTSC-M).
  • Page 13 8. Shipping Conditions Item Condition Remark Input Mode TV02CH Volume Level Mute Aspect Ratio 16:9 Video EZ Picture Daylight Contrast Brightness Color Sharpness Tint Color-temperature Cool Audio Audio Language EZ SoundRite EZ Sound Normal Balance Treble Bass Front Surround TV Speaker Timer Auto clock Manual Clock...

  • Page 14: 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 15: Troubleshooting

    TROUBLESHOOTING 1. Power Board 1-1. General Power Flow Start check Doesn't the It is identical Is the Interface screen whole come with Power Off signal operated? out? condition? 1. Check the Power Off 2. Check the Interface condition. signal condition. Doesn't the Doesn't the Doesn't the...
  • Page 16 2. No Power (1) Symptom Does’t minute discharge at module. fl No front LED. fl (2) Check follow Power cord connected? Plug in power cord. Cable connecting the Line Filter Connect Cable. and Power Board connected? Is Fuse(F101) on Power Board Replace Fuse.

  • Page 17: Abnormal Display

    3. Abnormal Display 3-1. Does’t display the OSD (1) Symptom LED is green fl The minute discharge continuously becomes fl accomplished from module (2) Check follow Check the LVDS Is the LVDS cable Replace cable. cable? connected well? Reset cable. Replace Is the VSC Digital Operates the Thine...
  • Page 18 3-2. In case of does’t display the screen into specific mode (1) Symptom The screen does not become the display from specific input mode fl (RF, AV, Component, RGB, DVI). (2) Check follow Check the all input mode should become normality display. fl...
  • Page 19 (5) Abnormal display in Component 480i mode Is the Video Decoder Are the Input voltage, IIC Replace IC IC306 UPD64011 Comm. and HV sync good? good? Is IC400 Are the Input voltage, IIC Replace IC Scaler good? Comm. and HV sync good? (6) Abnormal display in Component DTV mode Are the Input voltage, IIC Is normal the IC104...
  • Page 20 (7) Abnormal display in RGB DTV mode Are the Input voltage, IIC Is normal the IC101 Replace IC101 Comm. and HV sync good? CXA2181Q? Is normal the IC306 Are the Input voltage, IIC Replace IC306 MST9883C? Comm. and HV sync good? Is normal IC400 the Are the Input voltage, IIC Replace IC400...
  • Page 21 4. No sound (1) Symptom LED is green fl Screen display but no audio fl (2) Check follow Check Speaker Is the SPK cable Replace SPK cable cable? connected well? Reset cable. Audio normal on Is the Flat cable IC1004 MSP4440K IC1002 NSP-2100A RGB/DVI? connected well?

  • Page 22: Block Diagram

    BLOCK DIAGRAM - 22 -...

  • Page 23: Wiring Diagram

    - 23 -...

  • Page 24: Exploded View

    - 24 -...
  • Page 25 TILT SWIVEL ASSEMBLY, 32LC2D-UD NONE STAND BOTTOM C/SKD WITHOUT PRINTING 68719ST901A PWB(PCB) ASSEMBLY,SUB, SUB T.T LA51D 32LC2D-UD ALKRLLX SIDE TOTAL 6709900016A POWER SUPPLY ASSEMBLY, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 68719ST916A PWB(PCB) ASSEMBLY,SUB, SUB T.T LA51D 32LC2D-UD ALUSLLX AV TOTAL ASSY 68719ST899A PWB(PCB) ASSEMBLY,SUB, SUB T.T LA51D 32LC2D-UD ALKRLLX KEY TOTAL...
  • Page 26 - 26 -...
  • Page 27 METAL, FRAME, MAIN 37LC2D 4950TKA361K METAL, FRAME, MAIN 37LC2D(C/SKD) 6709900016B POWER SUPPLY ASSEMBLY, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 37INCH 33139D3029A MAIN TOTAL ASSEMBLY 37LC2D-UD BRAND LA51D. 68719ST918A PWB(PCB) ASSEMBLY,SUB, SUB T.T LA51D 37LC2D-UD ALUSLLX AV TOTAL...

  • 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: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C334 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C451 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C335 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 30 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C811 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C1126 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C812 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 31 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C637 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C621 0CC102CK41A 1000PF 1608 50V 5% R/TP NP0 C638 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 32 IC400 0ICTMLG009C LGDT1102C HD2.3 LG IC SBGA- C629 0CH8226F691 22UF 16V 20% 105STD (CYL) R IC505 0ICTMLG013A LGDT1901A LG IC 24P SSOP TR C630 0CH8226F691 22UF 16V 20% 105STD (CYL) R IC902 0ICTMLG018B LGDP4411 IEP2 LG IC 208P LQ C646...
  • Page 33 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC304 0IPRPFA016A FMS6407MTC20X-NL(PB-FREE) F F815 6200QJ3001A "FILTER,EMI REEL/TAPING BMS4" IC306 0IPRPM3002D "MST9883C-LF-110 MSTAR 80P,L" F816 6200QJ3001A "FILTER,EMI REEL/TAPING BMS4"...
  • Page 34 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q300 0TR102009AJ KRC102S KEC REEL TAPING SOT R1060 0RJ0101D677 1 OHM 1/10 W 5% 1608 R/TP Q301 0TR102009AJ KRC102S KEC REEL TAPING SOT...
  • Page 35 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R310 0RJ2202D677 22K OHM 1/10 W 5% 1608 R/TP R985 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R311 0RJ2202D677 22K OHM 1/10 W 5% 1608 R/TP...
  • Page 36 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1065 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R168 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R1067 0RJ0101D677 1 OHM 1/10 W 5% 1608 R/TP...
  • Page 37 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R291 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R287 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R292 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/T...
  • Page 38 X600 6212AB2845A ABLS-27.000MHZ-16-B-4Y-F-T R975 0RJ0102D677 10 OHM 1/10 W 5% 1608 R/TP SW101 140-313A TACT 2LEAD 100G(TA) LG C&D R976 0RJ0102D677 10 OHM 1/10 W 5% 1608 R/TP TU1100 6700AN0002C TDVS-H702P LGIT ATSC/NTSC D R977 0RJ0102D677 10 OHM 1/10 W 5% 1608 R/TP...
  • Page 39 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION SW105 140-313A TACT 2LEAD 100G(TA) LG C&D C204 0CH2334F566 0.33UF 16V 10% X7R 2012 R/T SW106 140-313A TACT 2LEAD 100G(TA) LG C&D C205 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 40 R126 0RN1002F409 10K OHM 1/6 W 1.00% TA52 C160 0CH2474F566 0.47UF 16V 10% X7R 2012 R/T SW200 6634D00010D TASA-H303P LG INNOTEK 75 OH C161 0CE227SF6DC 220UF MVG 16V 20% R/TP(SMD) X100 6212AB3004D CSALF2M69G4ZF01-A3 MURATA 2 C203 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD)
  • Page 41 DATE: 2005. 12. 11. DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L106 6210VC0006A FBMH3216 HM501NT TAIYOYUDEN R1170 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% L107 6210VC0006A FBMH3216 HM501NT TAIYOYUDEN...
  • Page 42 DATE: 2005. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R101 0LCML00003B MLB-201209-0120P-N2 5A MAG R102 0LCML00003B MLB-201209-0120P-N2 5A MAG R103 0LCML00003B MLB-201209-0120P-N2 5A MAG R104 0RH4701D622 4.7K OHM 1 / 10 W 2012 5.00 R105 0RH4701D622 4.7K OHM 1 / 10 W 2012 5.00 - 42 -...
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  • Page 60 Dec., 2005 P/NO : 38289S0043C Printed in Korea...

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