LG 70UM7350PUA Service Manual
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LG 70UM7350PUA Service Manual

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LED TV
SERVICE MANUAL
CHASSIS : UA93U
MODEL : 70UM7350/7370PUA
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71442709 (1903-REV00)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
70UM7370AUB
CONFIDENTIAL

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  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
  • Page 2 SPECIFICATION ..................6 SOFTWARE UPDATE ................10 BLOCK DIAGRAM ................. 12 EXPLODED VIEW .................. 13 ASSEMBLY / DISASSEMBLY ..............14 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: Application Range

    Component and AV and DVI use same jack ; SPDIF out(1EA) Optical Audio out Rear (1EA), USB Input(3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Side(1EA), Rear(1EA) - 6 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 7 8K Model Only 7680*4320 1188 8K Model Only 7680*4320 2376 8K Model Only 7680*4320 263.74 59.94 2376 8K Model Only 7680*4320 2376 8K Model Only - 7 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 8 4096*2160 53.95 23.98 296.7 UDTV 2160P 4096*2160 UDTV 2160P 4096*2160 56.25 UDTV 2160P 4096*2160 61.43 29.97 296.7 UDTV 2160P 4096*2160 67.5 UDTV 2160P - 8 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 9 8K Model Only 7680*4320 1188 8K Model Only 7680*4320 2376 8K Model Only 7680*4320 263.74 59.94 2376 8K Model Only 7680*4320 2376 8K Model 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 automatically (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 (5) [After finished the update, below Pop-up appear version (6) Turn OFF the TV and On. Check the updated SW Version (3) Click [DOWNLOAD AND INSTALL] and Tool Option - 11 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 12: Block Diagram

    BLOCK DIAGRAM 1. Main IC - 12 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 13 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. - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 14 1. 70UM73_1pole/2pole Set B/C Guide 1-1. Allowed to handle Guide line 1-2. Prohibited while handling DO NOT handle the area all the time Guide line - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 15: Disassembly Guide

    (2pole) Lift up the rear cover using stuffs like paddle or cards to insert between rear 2pole cover and rear cover, bottom. 2pole - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 16 Image Type Working guide Remark Unfasten screws on 1pole supporter. 1pole Unfasten screws on 2pole supporter 2pole - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 17: Assembly Guide

    2. Fasten screws on each points. 3. Hang speaker cable as below. 1. Workers should hold each side as below. SHOULD check handling guide on first page. Common - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 18 Image Type Working guide Remark 1. Fasten screws on each points. Common 1. Assemble 1pole stand. 1pole 2. Fasten screws on each points. - 18 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 19 Image Type Working guide Remark 1. Assemble 2pole stand. (A/B) 2pole 2. Fasten screws on each points. (A/B) - 19 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 2) Disassemble 8 SPCB Cover shield L/R screws (Use M3 Screw Module Driver) 3) Disassemble the screw, and then move each SPCB cover field L/R upward to disassemble it. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 - Screw Spec : M3*6.0mm Tapping Screw(Silver) - Location : Up(11ea)/Left(6ea)/Right(6ea) - Driver : Normal size screw TIP Driver is available. Back side Screw point Left Right Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 22 7) Disassemble 4 EMI Tapes of the Panel SPCB - Remove parts attached to the cover Bottom by hand (no need to be removed up to the panel SPCB attachment surface) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 23 - Must be worked more than two people, one on the left and one on the right side with both hands reverse 180 degrees. Lift the lower SPCB Reverse Product Upper upwards Side Use as Support Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 24 - Unhook the C/Top hook fastened to the Guide Panel by using the flathead Driver. Insert Flathead Driver Section of C/Top Hook C/Top Hook (Up : 10ea , Left : 3ea, Right :3ea (Total 16ea) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 - After releasing the 4 sided Hook, remove the C/Top by lifting it upwards (* Precautions : Must be worked more than 2 people, Be careful of damage to the Case Top due to large size) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 (* Precautions : Must be worked more than 2 people, Be careful of damage to the Guide Panel due to large size) Up: 12ea, Down: 12ea, Left: 7ea, Right: 7ea Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 27 - Assembly direction is divided by the shape of the Sheets/Diffuser Plate on the front left side of SET (other than that, the corners are rectangular) Sheet 2ea+ Diffuser Plate: Chamfer shape Lower Sheet: Round shape the upper left Diffuser Plate1ea Upper Sheet: Chamfer shape SET Front Position Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 28 - Invert the LCM and disassemble the upper Support Pin Hook at the rear of the LCM using the tool (Long nose plier ) Backside Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 29 - Disassemble the Led Array Bar (Led Array and Cover Bottom are fixed with two-sided tape, so use appropriate force to cover the Led Array. Take it off and attach a new Led Array Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 30 - Align the reflector with the reflector guide hole at two locations on the center/bottom of the reflector and assemble two support plates first. Support DP assembly Center Up/Down Reflector Assemble. Align Guide Hole Support Plate Assemble Only 2 sites first Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 31 Support DP is vertical Position to the LCM. 26) Support Pins Assembly - Press the Support Pin with your hand down to fix it to the Cover Bottom (Total 5ea) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 32 * Precautions: Check that the sheet hanging hole on the upper/lower/left/right outer is properly seated on the cover Bottom Sheet hanging. Up : 8ea, Down : 6ea, Left : 5ea, Right : 5ea Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 33 As this may be relatively difficult, assemble as follows: G/Panel Forcing Force on Lower Side * Precautions : In case of gap between guide panel and sheet (Direction Down Line) Recheck Hook Tightening Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 34 - When the panel is seated, the guide panel should not be lifted onto the PG section. Panel damage occurs when assembling the case top while the panel is mounted on top of the PG. Guide Panel PG Guide Panel PG Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 35 31) Confirm C/Top Book Tightening - Check if the Hook is engaged C/Top Hook (Down: 8ea) C/Top Hook (Up: 10ea , Left: 3ea, Right:3ea (Total 16ea) ) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 36 33) Assemble the Panel SPCB L/R to the SPCB Holder. - First, enter the upper part of the holder and then press the lower part of the holder to tighten the SPCB. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 37 - Driver : M3 Screw Module Driver available. 35) Assemble 4 Panel SPCB EMI Tapes - Press EMI Tape attached to Panel SPCB side on Cover Bottom and attach it by hand.. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 - Screw Spec : M3*6.0mm Tapping Screw(Silver) - Location : Up(11ea)/Left(6ea)/Right(6ea) - Driver : Normal size screw TIP Driver is available. Backside Screw point 상 좌 우 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 39 39) Assemble 8 SPCB Cover shield L/R screws ( Use M3 Screw module Driver) *Precautions : Cover Shield flange must be inserted between C/Top and BLU (do not protrude into C/Top outer) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 40: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 41 Main PCB <SIZE: 165X174> Main processor K5Lp eMMC EEPROM Audio AMP Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 42: Main Pcb Assy

    Main PCB Assy Module (PANEL) P7600 P1000 Power SPEAKER P5800 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 43 Interconnection 70UM73/71 [PCBs] Main PCB Module FFC 75UM75 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 44 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 45 ☞A4 & A2 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 46 ☞A18 Check various Check and No Video/ voltages of Power Normal replace No audio Board (13.2V…) voltage? MAIN B/D Replace Power Board and repair parts Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 47 1. Reconnection 2. Install Booster S/W Upgrade Contact with signal distributor Normal or broadcaster (Cable or Air) Picture? Normal Picture? Replace Main B/D Close Close Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 48 /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 cable error normal Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 49 Replace screen? Screen (Check normal operation of Main /T-con External Input, Component, normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 50 Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Normal Close Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 51 Replace Main B/D Normal? Abnormal Check for all 2- phase Replace Power B/D power out Abnormal Fix A/C cord & Outlet and check each 2 phase out Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 52 Reboot by SW down load function UNKNOWN No meaning (same as initial value) COMP_END OLED threshold voltage degradation(Compensation) completes. PNWASHDONE Power off by panel noise wash function complited. (OLED) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 53 13.2V of Power Screen normal voltage Speaker off Board Cancel OFF Replace Power Board and repair parts Check Replace MAIN Board Disconnection Speaker disconnection Replace Speaker Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 54 (In case of Connect and check Normal External Input other external audio? signal error) device Check and fix external device Check and fix external device Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 55 Replace Main B/D (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 56 RF Receiver ver Close is “00.00”? Replace MR19 Close Change the RF Receiver assy * If you conduct the loop at 3times, change the M4. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 57 INSTART menu Voltage? 1pin Main B/D ☞A24 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value is “NG”? Close Change the Wifi assy Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 58 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 59 “Part related to nose” in the Owner’s then proceed as shown in the solution manual Manual. (For models without any fix information, provide the description) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 60 Revised date Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 61 Exchange Module (1) ~ (3) Inverter/ Module A-8/11 A-9/11 ~ Only using Exchange T-Con (1) ~ (2) T-con model A-10/11 Exchange Power Board(PSU) A-11/11 Continue to the next page Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 62 Check items after Main B/D replacement E. Etc Adjustment Test pattern – ADJ Key How to use JIG (Power B/D Diganostic Smart Jig Multi Gender Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 63 Check LCD back light with naked eye Content date After turning on the power and disassembling the case, check with the naked eye, whether you can see light from locations. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 64 2. Enter into White Balance. 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 65 All Setting  Programmes  Programme Tuning & Settings  Manual Tuning All Settings When the signal is strong, use the attenuator (-10dB, - 15dB, -20dB etc.) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 66 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 67 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 68 Revised Content connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 69 A. Video error_Color error symptom date Revised Content Check Link Cable(EPI) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 70 Screen darkness to disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 71 CABLE Color spread FFC connection problem CABLE Color spread FFC connection problem Due to foreign substance within CABLE Screen stop FFC PIN A - 2/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 72 Main IC problem Main Dark picture Dark left-side screen Top/bottom screen part Main Broken picture Picture problem due to tuner Inner side quality problem A - 3/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 73 Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 74 Screen picture spread problem Screen problem No problem at the initial stage. Right-side Main During Heat run, right-side picture picture problem problem A - 5/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 75 BLU internal foreign matter inflow MODULE Internal matter 6 block image broken MODULE Image broken MODULE Image broken Screen sync signal broken A - 6/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 76 BLU Vertical spreading on cube screen in no MODULE Vertical smear signal MODULE Over color Screen contour part brightly Over color A - 7/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 77 Center of the screen 1 block dark MODULE Screen darkness MODULE Vertical bar Center Vertical Bar Darkness at the MODULE bottom of the MODULE internal BLU breakage screen A - 8/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 78 T-Con is defective and the picture below T-CON image broken the screen is broken A - 9/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 79 The entire screen is dark and bit noise T-CON Image Broken occurs The entire screen is dark and bit noise T-CON Image Broken occurs A - 10/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 80 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 81 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 82 5. LED voltage Check : P801, Pin 1-7 Picture Condition : VIVID (Back light 100) SK100 (AC input) 273.6V 334.4V all condition meets, Power Board OK. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 83 Picture Condition : VIVID (Back light 100) 전압 SK100 (AC input) 183.6 224.4 LED 1+ LED 2+ 123.3 150.7 all condition meets, Power Board OK. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 84 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 85 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 86 3.Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 87 2.Check the standby 3.5V on the terminal 6 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 88 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 89 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content How to use the Service remote control date 1. How to access the remote control Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 90 Digital EYE function ON/OFF For some Model, access to the Test Pattern TILT Used for screen tilting change (Access to the old PDP control mode) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 91 Connects to external input 1,2,3 COMP1,2 (Added function) Connects to Component 1,2 HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) DVI (Add function) Connects to DVI Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 92 - Record the R, G, B (GAIN, Cut) value of the color temperature before main board replacement. After replacing the main board, key in the recorded value. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 93 You can view 9 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 © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 94 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 95: Main Board

    24 Marking Check UK74,UK75 28Pin 28Pin 12Pin 12Pin 28Pin UK77,UK78 Cable Connection SK79 Includes 49UJ63 SM80/SM86 16/18Y/19Y 17Y/18Y 16Y/17Y 16Y/17Y/18Y/19Y (UH) (UH/SJ) (SJ/UJ/UK/SK) (UH/UK/UM (LH/LJ/LK/LM) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 96 UJ65/UJ68, UJ63/UJ67 LJ61/LJ68, LJ55/LJ58 SK80/SK85/SK95 UK78/UK75/UK77/SK79 ‘18 UK63/UK64/UK65/UK68/UK7050 LK57, 32/43/49LK54, 32LK61/62, 43/49LK61 ‘18 OLED B8, C8, E8, G8, W8 SM80/SM85/SM86 ‘19 UM73/UM74/UM75/UM76/UM79/UM80 LM57/LM63 ‘19 OLED B9/C9/E9/W9 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 97 ▶ Power Board Muitl Gender JIG “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 98 - 20V Power Board : Change the switch to 24V of Smart Jig Voltage - 13.2V/18V Power Board : Change the switch to 24V of Smart Jig Voltage Power B/D Smart Jig Voltage Switch 13.2V/18V Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 99 ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 100 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 101 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 102 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 103 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 104 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 105 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 106 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 107 ▶ Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 108 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 109 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 110 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 111 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 112 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.

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