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LG 34UM94 Service Manual
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LG 34UM94 Service Manual

Ips led monitor. chassis : lm94q
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IPS LED MONITOR
SERVICE MANUAL
CHASSIS : LM94Q
MODEL : 34UM94/95
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL63731165 (1408-REV02)
North/Latin America
Europe/Africa
Asia/Oceania
34UM94/95-PD/34UM95-PE
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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  • Page 1 North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com IPS LED MONITOR SERVICE MANUAL CHASSIS : LM94Q MODEL : 34UM94/95 MODEL : 34UM94/95-PD/34UM95-PE CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL63731165 (1408-REV02) Printed in Korea...
  • Page 2 SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ..............5 BLOCK DIAGRAM ..................9 EXPLODED VIEW .................. 10 SCHEMATIC CIRCUIT DIAGRAM .............. - 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: Specification

    EAY62949006 Output: DC 19V 7.37A 140W Adapter Weight : 0.58kg Applying module list P/No Specification EAJ62509601(ZBD) LM340UW1-SSA1 EAJ62767601(Dot free) - 4 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Adjustment Instruction

    Model Name 34UM95 Check Sum **** **** Special Item Need to Input Serial Number ** Protocol : DDC 2AB - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 * Save Warm(6500K) Color by commanding COLOR SAVE Condition or Video (MSPG6100) (SET) Command code. Sleep Off/Off mode blinking 0.5(PD) mode 0.3(PE) - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Command Form

    SyncFlags,HPeriodH, HPeriodL, VtotalH,VtotalL, SrcHTotalH, SrcHTotalL SrcHStartH, SrcHStartL, SrcVStartH,SrcVStartL, HsyncPhase ■ Temporary Data write: Write to particular address of EEPROM. - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Signal Table

    ■ 8-byte write L : 0x00,0x10,….0x70 5.6.5. EDID Read - DDC2B Command.(A0/A1) - 128 Byte transfer of EDID Buffer of MICOM - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Block Diagram

    BLOCK DIAGRAM Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 9 - Only for training and service purposes...

  • Page 10: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 10 - Only for training and service purposes...

  • Page 11: Signal Input

    ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SIGNAL INPUT Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. GPIO/SCALER POWER/LVDS Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR SLAVE SIGNAL INPUT THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. AVE SIGNAL INPUT Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR SLAVE SCALER POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. / LVDS VE SCALER POWER / LVDS Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 34UM95 2013.11.28 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Led Driver

    ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LED DRIVER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LED DRIVER Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Main Power

    ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MAIN POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AUDIO THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. USB UART Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB3.0 POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB3.0 POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. THNUNDER BOLT MAIN Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. THUNDER BOLT CONNECTOR Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THUNDER BOLT IC POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THUNDER BOLT POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 27: Trouble Shooting : No Power

    Check IC701 & IC707 Replace IC701, IC707 & Output Voltage Level Recheck (1.3V) Check X200 Clock Replace X200 12MHz Replace IC205 Flash Memory Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 Check IC100 P200(#16,17,32,33) Repair Main B/D P201(#8,9,24,25) Check FFC Cable for Damage or Replace Cable Open Conductors Replace T-Con Board or Module Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Check JK101(JK102) for proper connection or Replace Connector Damage Check I2C Signal Re Download EDID Data (JK101 or JK102) Replace Main Scaler (IC100) Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 Check DP Cable for Damage or Open Connector Check JK100 for proper Replace Connector connection or Damage Replace Main Scaler (IC100) Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 Check Thunderbolt Cable for Damage or Open Connector Check JK1300, JK1301 for proper connection or Replace Connector Damage Replace Main Scaler (IC100) Copyright © 2014 LG Electronics Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

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