LG 32LG70 Service Manual
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Also See for 32LG70:
- Manual (148 pages) ,
- Owner's manual (208 pages) ,
- Specifications (2 pages)
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Summary of Contents for LG 32LG70
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Page 1: Service Manual
Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LA86B MODEL : 32LG70 32LG70-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -
Page 2: Table Of Contents
PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................23 EXPLODED VIEW .................. 27 SVC. SHEET ....................Copyright © 2008 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes... -
Page 3: Product Safety
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2008 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 © 2008 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 © 2008 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
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Page 6: Specification
2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : 0 ~ 85 % Copyright © 2008 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes... - Page 7 1920*1080 26.97 23.94 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright © 2008 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
- Page 8 VESA (SXGA) 1280*1024 79.976 75.025 VESA (SXGA) 1600*1200 75.00 60.00 VESA (UXGA) 1920*1080 66.587 59.934 148.5 HDTV 1080P Copyright © 2008 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
- Page 9 1920*1080 26.97 23.94 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright © 2008 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
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Page 10: Adjustment Instruction
- Pattern name : Horizontal 100% Color Bar Pattern from the adjustment mode. - Pattern level : 0.7±0.1Vp-p - Image (3) Using regulation signal cable Copyright © 2008 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes... - Page 11 * It is possible to download on only POWER ON MODE. HDMI-1 [C/S : 8A27] EDID Block 0 table = D0 8A Copyright © 2008 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
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Page 12: White Balance
Signal Source * Not used when the inner pattern of the TV set is used Connection Diagram of Automatic Adjustment Copyright © 2008 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes... - Page 13 7) The adjustment is done at three white balances of Cool, volume +/- key to adjust Medium and Warm. Copyright © 2008 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
- Page 14 3) Jig for downloading (for the power supply) to download. (If no file is displayed, make sure that the file format is selected as Hex file (*.hex)) Copyright © 2008 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only...
- Page 15 (When the automatic proceeding is not smoothly done, manually perform the power On/Off). Copyright © 2008 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
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Page 16: Troubleshooting
TROUBLESHOOTING 1. VIDEO (1) Video path Copyright © 2008 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes... - Page 17 After checking thoroughly all path once again, Can you see the normal waveform? You should decide to replace BCM355x or not. Copyright © 2008 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
- Page 18 Can you see the normal waveform? After checking thoroughly all path once again, You should decide to replace BCM355x or not. Copyright © 2008 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
- Page 19 2. AUDIO (1) Audio path Copyright © 2008 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
- Page 20 Measure waveform at R559,R560,R561 because it’s more decide to replace item or not. easy to check.Can you see the normal waveform? Copyright © 2008 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
- Page 21 After checking audio signal line, you should decide Can you see the normal waveform? to replace item or not. Check the connector & Speaker. Copyright © 2008 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
- Page 22 After checking the Jack, you should decide to replace item or not. Copyright © 2008 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
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Page 23: Block Diagram
BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes... - Page 24 Copyright © 2008 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
- Page 25 Copyright © 2008 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
- Page 26 Copyright © 2008 LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only Only for training and service purposes...
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Page 27: 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 © 2008 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only... - Page 28 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 29 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 30 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 31 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 32 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 33 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 34 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 35 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 36 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 37 May, 2008 P/NO : MFL42149302 Printed in Korea...