LG 19LG31 Service Manual

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Specification sheet (2 pages)

Technical specifications (2 pages)

Owner's manual (220 pages)

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SERVICE MANUAL

CHASSIS : LA85C

MODEL : 19LG30

MODEL :

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

North/Latin America

Europe/Africa

Asia/Oceania

19LG31

19LG30-UA

19LG31-UB

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

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Summary of Contents for LG 19LG31

Page 1: Service Manual
Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LA85C MODEL : 19LG30 19LG30-UA MODEL : 19LG31 19LG31-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2: Table Of Contents
ADJUSTMENT INSTRUCTION ..............8 TROUBLE SHOOTING ................11 BLOCK DIAGRAM.................. 15 EXPLODED VIEW .................. 22 SVC. SHEET ....................Copyright © 2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
Page 3: Safety Precautions
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2007 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Servicing Precautions
Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright © 2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Specification
Humidity : ~ 80 % Storage Environment Temp : -20 ~ 60 deg Humidity : 0 ~ 85 % Copyright © 2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 1920*1080 33.75 30.00 74.25 HDTV 1080P 1920*1080 67.43 59.94 148.35 HDTV 1080P 1920*1080 67.5 60.00 148.50 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8: Adjustment Instruction
8. FACTORY MODE : ON 6) click “Run”. 9. DEBUG MODE : OFF 7) After downloading, check “OK” message. Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 ” key at “Warm” 0. STEREO DETECT 1. SYNC LEVEL 2. DTV SNR 3. SCREEN MUTE 4. POWER OFF HISTORY Copyright © 2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 *: Serial No : Controlled / Data:01 **: Month : Controlled / Data:00 ***:Year : Controlled ****:Check sum Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11: Trouble Shooting
Check Output Change IC705. of IC705. Pass Fail Change LED Assy. Check LED Assy. Pass Check P304 & Connector. Copyright © 2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12 Fail Check LVDS cable Change LVDS cable or module. or module. Pass Check input source cable & jack. Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
Page 13 Re-soldering or change defect part. Check input/output Check X100. of IC100. Pass Check input source cable and jack. Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 14 IC500. the defect part. Pass Fail Change the speaker. Check the Speaker. Pass Check the Speaker wire. Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
Page 22: Exploded View
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. Do not modify the original design without permission of manufacturer. Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only...
Page 25 Jan., 2008 P/NO : MFL41524405 Printed in Korea...

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LG 19LG31 Service Manual

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