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LG 32LX770M-UA Service Manual
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LG 32LX770M-UA Service Manual

Chassis : la5gi
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LED TV
SERVICE MANUAL
CHASSIS : LA5GI
MODEL : 32LX770M
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69373706 (1512-REV00)
Internal Use Only
32LX770M-UA
Printed in Korea

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Summary of Contents for LG 32LX770M-UA

  • Page 1 Internal Use Only LED TV SERVICE MANUAL CHASSIS : LA5GI MODEL : 32LX770M 32LX770M-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69373706 (1512-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............8 TROUBLE SHOOTING GUIDE ............... 19 BLOCK DIAGRAM .................. 25 EXPLODED VIEW .................. 26 - 2 - Copyright © LG Electronics. Inc. All rights reserved. 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. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    - 4 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : ~ 85 % - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 HDTV 1080P 1920*1080p 33.75 30.00 74.25 HDTV 1080P 1920*1080p 67.43 59.94 148.35 HDTV 1080P 1920*1080p 67.50 60.00 148.50 HDTV 1080P - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Adjustment Instruction

    ▪ Manual adjustment for ADC calibration and White balance ▪ Shipment conditions, Channel pre-set 4.2.6. Inspection - In INSTART menu, check these keys. - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 HDMI cable and D-sub cable are not need. *IP Number : 12.12.2.2 ▪ Adjust remocon Connect SET → LAN port == PC → LAN Port - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 00 00 00 FC 00 4C 47 20 54 56 20 52 56 55 0A 20 20 20 LA5GG/I/J 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ1 ⓔ2...
  • Page 11 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 LA5GG/I/J 00 00 00 FC 00 4C 47 20 54 56 20 52 56 55 0A 20 20 20 ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ Checksum(LG TV): Changeable by total EDID data. ⓔ1 ⓔ2...
  • Page 12 ▪ W/B Adj. must begin as start command “wb 00 00” , and finish as end command “wb 00 ff”, and Adj. offset if need - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 ▪ Press Adj. key on the Adj. R/C, then select Tool option * Tool option can be reconstructed by Software 10-19 20-35 36-49 50-79 80-119 Over 120 - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 5.4.1. Using RS232 Command Command Set ACK Transmission [A][l][][Set ID][][20][Cr] [O][K][x] or [N][G] 5.4.2. Check the menu on in-start - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Connect oscilloscope, you can see this waveform * Remark: Inspect in Power Only Mode and check SW version in a master equipment - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 (2) Turn to the Pro:Idiom channel (No. 96-1) (3) Check the video & sound ** Only displayed at “POWER ONLY” mode - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 METAL GND - Hi-pot TEST = POWER CORD GND & LIVE & NEUTRAL ▪ LEAKAGE CURRENT: At 0.5 mArms - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 (2) Select "Tool Option 1" and push "OK" key. (3) Punch in the number. (Each model has their number) - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Trouble Shooting Guide

    Check Q2302 application circuit or Check Q2302 output Voltage(13.2V) replace Q2302 Replace Cable Check LVDS Cable Check LCD Module Control board - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Replace L8903 or IC8900 Check tuner 1.8V power L8903 Replace Main IC(IC101) or main Check Mstar LVDS output board - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 Check tuner application circuit or TU8900 #6, 8, 16 Pin replace tuner. Check X101 Replace X101 and application circuit Replace IC101 - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 Main chip (M14+) have some troubles. After checking thoroughly all path once again, You should decide to replace M14+ or not. - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 This board has big problem because Main chip (M14+) have some troubles. After checking thoroughly all path once again, You should decide to replace M14+ or not. - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 Check the speaker output wafer P5600. to replace item or not. Can you see the normal waveform? Check the connector & Speaker - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Block Diagram

    BLOCK DIAGRAM - 25 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Exploded View

    Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 26 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

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