- LG Flat Panel Television User Manual

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD84A

MODEL : 32LG3000 32LG3000-ZA

website:http://biz.LGservice.com

Internal Use Only

Summary of content (26 pages)

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Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LD84A MODEL : 32LG3000 32LG3000-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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CONTENTS CONTENTS .............................................................................................. 2 PRODUCT SAFETY ..................................................................................3 SPECIFICATION ........................................................................................6 ADJUSTMENT INSTRUCTION ...............................................................10 TROUBLE SHOOTING ............................................................................
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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. Do not modify the original design without permission of manufacturer.
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SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1.
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IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1.
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SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to the LCD TV used LD84A chassis. 2. Requirement for Test 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety: CE, IEC specification - EMC: CE, IEC Model Each part is tested as below without special appointment.
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5.
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6. Component Video Input (Y, PB, PR) No Specification Remark Resolution H-freq(kHz) V-freq(Hz) 1 720*480 15.73 60.00 SDTV, DVD 480i 2 720*480 15.63 59.94 SDTV, DVD 480i 3 720*480 31.47 59.94 480p 4 720*480 31.50 60.00 480p 5 720*576 15.625 50.00 SDTV, DVD 625 Line 6 720*576 31.25 50.00 HDTV 576p 7 1280*720 45.00 50.00 HDTV 720p 8 1280*720 44.96 59.94 HDTV 720p 9 1280*720 45.00 60.00 HDTV 720p 10 1920*1080 31.25 50.00 HDTV 1080i 11 1920*1080 33.
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8. HDMI DTV No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 1 720*480 15.734 / 15.6 59.94 / 60 27.00 SDTV 480I 2 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 SDTV 480P 3 720*576 15.625 50 27(54) SDTV 576I 4 720*576 31.25 50 54 SDTV 576P 5 1280*720 37.500 50 74.25 HDTV 720P 6 1280*720 44.96 / 45 59.94 / 60 74.17/74.25 HDTV 720P 7 1920*1080 33.72 / 33.75 59.94 / 60 74.17/74.25 HDTV 1080I 8 1920*1080 28.125 50.00 74.
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ADJUSTMENT INSTRUCTION 5. Click “Auto” tab and set as below 6. Click “Run”. 7. After downloading, check “OK” message. 1. Application Range This specification sheet is applied to all of the LCD TV with LD84A chassis. (5) filexxx.bin 2. Designation (7) ........ OK 1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing. 2) Power Adjustment: Free Voltage 3) Magnetic Field Condition: Nil.
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Impress Resolution 1080i Model : 223 in Pattern Generator(1080i Mode) Pattern: 65 in Pattern Generator(MSPG-925 series) * After downloading, have to adjust TOOL OPTION again. 1) Push "IN-START" key in service remote controller 2) Select "Tool Option 1" and Punch in the number.(Each model has their number.) 32LG5000-ZA : 8977 3) Completed selecting Tool option 3.1.
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4.3 DDC EDID Write (RGB 128Byte ) 4. Total Assembly line process - Connect D-sub Signal Cable to D-Sub Jack. - Write EDID DATA to EEPROM (24C02) by using DDC2B protocol. - Check whether written EDID data is correct or not. 4.1. Adjustment Preparation (1) W/B Equipment condition CA210: CH 9, Test signal: Inner pattern (85IRE) (2) Above 5 minutes H/run in the inner pattern. (“power on” key of adjust remote control) (3) 15 Pin D-Sub Jack is connected to the AUTO W/B EQUIPMENT.
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(3) DIGITAL DATA(HDMI-2) 256Byte 4.12 Internal pressure Confirm whether is normal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for one second (4) DIGITAL DATA(HDMI-3) 256Byte 1) All Data : HEXA Value 2) Changeable Data : *: Serial No : Controlled / Data:01 **: Month : Controlled / Data:00 ***:Year : Controlled ****:Check sum 4.7.
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TROUBLESHOOTING 1. No Power (1) Symptom 1) It is not discharged minutely from the module. 2) Light does not come into the front LED. (2) Check process No Is inserted a plugged in power cord? Plug in the power cord. Yes Is the Line Filter and Power Board Cable connected? Is the fuse of PSU normal? No Connect the Cable. No Replace the Fuse. Yes Is it connected that PSU and P1100 in Main B/D? No Connect the Cable P1100. Yes If there is normal status, Replace main board.
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2. No Raster (1) Symptom 1) No OSD abnd image occur at screen. 2) It maintains the conditioon where the front LED is blue. (2) Check process No No Does minute discharge at Module? Is the inverter on? Is output the normality Low/High voltage except Stand-by 5V? No Replace the Power board. Yes Check the LCD Module. Is the link cable normal? No Reconnect Panel link cable. (P401 or P406 or P407) Yes No Is the IC801’s output normal? Replace the Main board. Yes Change the IC(IC100).
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3. Unusual display from TV/CATV mode Is video output of the Tuner normal?(CheckTU500 _Pin15) No Yes Is the input voltage normal?(Check TU500_Pin4) Is the LVDS cable connected well? Yes Replace Main board. No No Check the Power. Yes Is the I2C communication Normal?(Check Pin10, Pin11) Check the Tuner. No Cable inserts well. Yes Change the IC(IC100). BLOCK A 4.
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5. Unusual display from AV1/AV2(SCART) mode - CVBS Input - RGB Input Is video input of SCART Jack normal?(Check JK600, JK601_Pin20) Is video input of the RGB Jack normal?(Check JK600 _Pin7,11,15) No Check the input source. Yes No Check the input source. Yes If there is normal status, Replace main board. Same as Block A. Is waveform of Switching IC normal? (Check IC700_Pin11, 12,13) No Check the IC700. No If there is normal status, Replace main board. Same as Block A. 6.
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8. Unusual display from RGB mode Is video input of the RGB jack normal? (Check JK703_Pin1, 2,3,13,14) No Check the input source. Yes Is waveform of Switching IC normal? (Check IC700_Pin11, 12,13) No Check the IC700. No If there is normal status, Replace main board. Same as Block A. 9. Unusual display from HDMI 1/2/3 mode Is video input of the HDMI jack normal? (Check JK900, 901,902) No Check the input source. Yes Check DDC communication lines(IC900,901,903 _Pin5,6 No Check the IC900, IC901, IC903.
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10. No Sound (1) Symptom 1) LED is blue 2) Screen display but sound is not output. (2) Check process No Is the speaker “on” on menu? All input is no sound? No Is the Speaker cable normal? Download the EDID data. No Check th Speaker cable. Yes Yes No Only RF or DTV is no sound? Set on speaker on menu. Yes Yes Only HDMI is no Sound? No IC100 operate normally? Check the Tuner in/Out. No Replace IC100. Yes IC1000 operate normally? No Replace IC1000. Yes Replace main board.
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P/NO : MFL41037107 Feb.