LG 32LJ600U Service Manual

LG 32LJ600U Service Manual

Chassis ld75k

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LED TV
SERVICE MANUAL
CHASSIS : LD75K
MODEL : 32LJ600U
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69886201 (1709-REV01)
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
32LJ600U-ZA

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Summary of Contents for LG 32LJ600U

  • Page 1 LED TV SERVICE MANUAL CHASSIS : LD75K MODEL : 32LJ600U 32LJ600U-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69886201 (1709-REV01) Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 SPECIFICATION ..................6 SOFTWARE UPDATE ................10 BLOCK DIAGRAM ................. 11 EXPLODED VIEW .................. 17 DISASSEMBLY GUIDE ................18 TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 4: Servicing Precautions

    - 4 - Copyright © LG Electronics. Inc. All rights reserved. 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. Only for training and service purposes.
  • Page 6: Specification

    SAT1R 50.0W, INTELSAT903 33.5W , INTELSAT904 60.0E, NILESAT 7.0W , NSS12 57.0E , THOR 0.8W , TURKSAT 42.0E , YAMAL201 90.0E , OTHER - 6 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 7 USB (2EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect PCMCIA Card slot (1EA) PCMCIA slot - 7 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 8 29.97 HDTV 1080P 1920*1080 33.75 30.00 HDTV 1080P 1920*1080 56.25 50.00 HDTV 1080P 1920*1080 67.43 59.94 HDTV 1080P 1920*1080 67.50 60.00 HDTV 1080P - 8 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 9 1280 x 1024 @60Hz 63.98 60.02 VESA(SXGA) FHD only 1360 x 768 @60Hz 47.71 60.01 VESA(WXGA) 1920 x 1080 @60Hz 67.50 60.00 WUXGA(CEA 861D) FHD only - 9 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 10: Software Update

    (7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option. - 10 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 11: Block Diagram

    BLOCK DIAGRAM 1. Main SOC Block Diagram - 11 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 12 2. Tuner + CI - 12 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 13: Video & Audio In/Out

    3. Video & Audio IN/OUT - 13 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 14 4. HDMI 1.4 - 14 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 15 5. USB / Wi-Fi / M-Remote / UART - 15 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 16 6. I2C Map - 16 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 17: Exploded View

    It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 17 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 18: Disassembly Guide

    (6) Disassemble Back cover * Disassemble it from left to right for top side hook on Back cover - 18 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 19 B/C Hole size Tool spec - w : 4.6 mm - Long nose pliers - t : 3.5 mm - Needle nose pliers - 19 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 20: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 21 E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 22 ☞A4 & A2 Always check & record S/W Version and White Replace Main B/D Re-enter White Balance value Balance value before replace the Main B/D Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 23 Revised date 2/14 ☞A9 Check and Video X / Check Adapter Normal Replace Audio X 19V output Voltage Main B/D Repair or Replace Adapter or parts Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 24 1. Reconnection 2. Install Booster S/W Upgrade Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 25 /Cable device and error normal cable Request repair for external device/cable Check external External device device and Replace Main/T-con B/D HDMI /Cable error cable normal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 26 RGB and HDMI/DVI by Screen Normal Main /T-con connecting Jig, pattern normal? screen? Generator ,Set-top Box etc. - HDMI ULTRA HD Deep Color menu off Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 27: Power Error

    "POWEROFF_UNKNOWN" Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 28 Adapter Correct Screen normal voltage CORRECT output Set correct output Replace Adapter and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 29 (In case of External Connect and check Normal Input signal error) other external device audio? Check and fix external device Check and fix external device Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 30: Function Error

    Replace Power B/D or Replace Main B/D If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 31 “NG”? Voltage? Wafer pin Main B/D ☞A15 Check & Repair Close Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 32 Recognition error - S/W Version HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 33 KMS fix information and then proceed “Part related to nose” in the Owner’s as shown in the solution manual Manual. (For models without any fix information, provide the description) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 34 Revised date 14/14 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 35 Defected Type caused by T-Con/ Exchange Power Board (PSU) A-3/5 Inverter/ Module Exchange Module (1) A-4/5 Exchange Module (2) A-5/5 Continue to the next page Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 36 Voltage and speaker checking method when there is no audio Remote control operation checking method D. Function error Motion Remote operation checking method Wifi operation checking method Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 37 2. Enter into White Balance menu. 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 38 TUNER input signal strength checking method Content date <ALL MODELS>  Advanced Channels Channel Tuning Manual Tuning When the signal is strong, use the attenuator (-10dB, - 15dB, -20dB etc.) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 39 Version checking method Content date <ALL MODELS> 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 40 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MAIN BOARD. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 41 Revised Content Connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 42 Revised Content Check Link Cable(VX1) reconnection condition date <ALL MODELS> Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 43 You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 44 Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack A - 1/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 45 Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION A - 2/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 46 Appendix : Exchange Power Board (PSU) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 47 Appendix : Exchange the Module (1) Press damage Press damage Press damage Crosstalk Crosstalk Un-repairable Cases In this case please exchange the module. A - 4/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 48 Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect A - 5/5 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 49 Established B. Power error _No power symptom date Revised Content Check front Power Indicator date ST-BY condition: On or Off Power ON condition: Turn Off Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 50 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Check power input voltage and ST-BY 3.5V Content date Check the DC 13.2V. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 51 POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 52: Checking Method

    1. Press the Setting button on the remote control 2. Select the Sound function of the Menu 3. Select the Sound Out 4. Select TV Speaker Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 53 After connect speaker and contact the output terminal of the speaker with GND, if there is sound ouput noise, we conclude the speaker works well. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 54 2.Check the standby 3.5V on the terminal 16 pin (③) 3.AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 55 Checking order to check motion remote/wifi KEY1 Checking order 1.Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2.Check the 3.5V on the terminal 22 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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