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LG 32LC2DC Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LA51D
FACTORY NAME : 32LC2DC
MODEL : 32LC2DC
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 32LC2DC

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LA51D FACTORY NAME : 32LC2DC MODEL : 32LC2DC 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 ............... 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 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 32LC2DC Aspect Ratio 16:9 Tuning System LCD Module LC320W01-SL11 For 32LC2DC Operating Environment 1) Temp : 0 ~ 40 deg...
  • Page 7 5. Chroma & Brightness 5.1 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 +/- 0.03 0.610 +/- 0.03...
  • 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 8. HDMI Input (PC/DTV) Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 640*480 31.469 59.94 25.17 VESA(VGA) 640*480 37.861 72.80 31.50 VESA(VGA) 640*480 37.500 75.00 31.50 VESA(VGA) 800*600 35.156 56.25 36.00 VESA(SVGA) 800*600 37.879 60.31 40.00 VESA(SVGA) 800*600 48.077 72.18 50.00 VESA(SVGA) 800*600 46.875 75.00...

  • Page 10: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Object 4. EDID(The Extended Display These instructions are applied to all of the LCD TV, AF-05FD. Identification Data)/DDC (Display Data Channel) download 2. Notes This is the function that enables “Plug and Play". (1) Because this is not a hot chassis, it is not necessary to use 4-1.
  • Page 11 EDID DATA for RGB 6. Adjustment of White Balance EDID table = 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 6-1. Required Equipment 00 00 FF FF FF FF FF FF 00 1E 6D 5D 46 01 01 01 01 (1) Color analyzer (CA-110, CA-210 or similar product) 10 07 0F 01 03 68 46 28 96 0A D4 6C A3 57 49 9C 25 (2) Automatic adjustor (with automatic adjustment hour...
  • Page 12 7. Video(uPD) 7-1. Required Equipment MSPG925FA Pattern Generator-connector with Video Input 7-2. MSG925FA Adjustment (1) After select the model, input the #201(NTSC-M). (2) Receive the 100% Color Bar Pattern.(Pattern #33) (3) Select the Reverse button and select the signal as below figure.
  • 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 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 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: No Power

    2. No Power (1) Symptom ● Does’t minute discharge at module. ● No front LED. (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 ● The minute discharge continuously becomes accomplished from module (2) Check follow Check the LVDS Is the LVDS cable Replace cable. cable? connected well? Reset cable. Replace Operates the Thine Check...
  • 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 (RF, AV, Component, RGB, DVI). (2) Check follow ● Check the all input mode should become normality display. (3) Abnormal display in RF mode Is the Tuner Cable Are the Input voltage, IIC Comm.
  • 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 Is normal the IC104 Are the Input voltage, IIC...
  • Page 20 (7) Abnormal display in RGB DTV mode Is normal the IC101 Are the Input voltage, IIC Replace IC101 Comm. and HV sync good? CXA2181Q? Are the Input voltage, IIC Is normal the IC306 Replace IC306 MST9883C? Comm. and HV sync good? Is normal IC400 the Are the Input voltage, IIC Replace IC400...

  • Page 21: No Sound

    4. No sound (1) Symptom ● LED is green ● Screen display but no audio (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

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  • Page 24: Exploded View

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  • Page 26: Replacement Parts List

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  • Page 42 Aug., 2006 P/NO : 38289S0043 Printed in Korea...

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