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LG 23MA73D-PUP Service Manual
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LG 23MA73D-PUP Service Manual

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LED TV
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
MFL67714439 (1301-REV00)
LA31A
23MA73D
North/Latin America
Europe/Africa
Asia/Oceania
23MA73D-PUP
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 23MA73D-PUP

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LA31A MODEL : 23MA73D 23MA73D-PUP CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67714439 (1301-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................13 BLOCK DIAGRAM .................. 20 EXPLODED VIEW .................. 21 SCHEMATIC CIRCUIT DIAGRAM .............. Copyright © 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 © LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Servicing Precautions

    Copyright © LG Electronics. Inc. All right reserved. - 4 - 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. 3. Solder the connections. Copyright © LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    Side 1EA HDMI1/2 USB (1EA) EMF, DivX HD, Side 1EA For SVC (download) JPEG, MP3, DivX HD Local Key (Touch) Copyright © LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 55.935 59.887 106.500 1600*900 60.000 60.000 108.000 1680*1050 64.674 59.883 119.000 1680*1050 65.290 59.954 146.250 1920*1080 67.500 60.000 148.500 Copyright © LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 1920* 1080 56.25 148.5 HDTV 1080P 1920* 1080 67.432 59.94 148.350 HDTV 1080P 1920* 1080 67.5 60.00 148.5 HDTV 1080P Copyright © LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    Use the speed under you didn’t have a DTV/ATV test on production line. 200KHz. Copyright © LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 * Display and Sound check is executed by Remote controller → Caution : Not to push the INSTOP KEY after completion if the function inspection. Copyright © LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 4) Check the model name Instart menu → Factory name displayed (ex 27MD73D-PZP) 5) Check the Diagnostics (DTV country only) → Buyer model displayed (ex 27MD73D-PZ) Copyright © LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 * After check all, Press the 'EXIT' key of ADJ remote controller to go out SVC menu. * When doing Adjustment, Please make circumstance as below. Copyright © LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Trouble Shooting

    Voltage Level (1.5V) Recheck Check X201 Clock Check X201 Clock Replace X201 Replace X201 24MHz 24MHz Replace IC100 Flash Memory Copyright © LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Repair Main B/D P601(#10,11,22,23) Check FFC Cable for damage Replace Cable or open conductors. Replace T-con Board or module Copyright © LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 2. Check IC805 Output voltage(1.8V) Check Tuner(TU3700) I2C Signal Check IC101 SCL(R2609), SDA(R2610) Check Tuner(TU3700) Replace Tuner(TU3700) Data, CLK, SYN, VAL Recheck Copyright © LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 Replace R237,R239,R241 R237,R239,R241 C218,C220,C222 C218,C220,C222 IC101 has problem Wave form of C220 Wave form of C222 Wave form of C218 Copyright © LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Wave form of R4025(Vsync) Wave form of R4024(Hsync) Wave form of R228/C204 Wave form of R230/C206 Wave form of R232/C208 Copyright © LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 Check I2C Signal (JK500/JK501) Re download EDID data (#15, #16) Replace Scaler(IC101) Check HDCP Key (IC101) Copyright © LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 (19V, 3.3V) Check Signal from IC700 Replace IC700 L700,L701, L706, L709 Check Signal from IC101 Replace IC101 SDA/SCL (R703/R214, R707/R213) Copyright © LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...

  • Page 20: Block Diagram

    BLOCK DIAGRAM Copyright © LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...

  • Page 21: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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