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North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LA46H MODEL : 50LF6100 50LF6100-UA MODEL : 50LF6090 50LF6090-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69121001 (1504-REV01) Printed in Korea...
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MID_MAIN_3 2011.12.09 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR ONE SIDE LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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JACK HIGH / MID 2011.11.21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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IR / KEY 2011.11.21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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2011.11.21 AMP_NEO ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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LOCAL DIMMING 2011.12.13 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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11.09.29 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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MID_MAIN_1 2013.07.16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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MID_MAIN_2 2013.07.16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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2011.11.25 MID_POWER ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM (RENESAS) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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HDMI 4 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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14Y Phone Jack 2013.08.27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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USB2_USB3 2013.11.25 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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LAN_VERTICAL 2013.11.26 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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TUNER 2013.07.16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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TUNER_CIRCUIT 2013.07.16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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LVDS_HIGH_MID 2013.07.16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Power Off History First of all, Check whether there is SVC Bulletin in GCSC System for these model. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 1 / 97 Only for training and service purposes...
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Exchange LED driver Board (PSU) A-3/5 Other : PSU Module Exchange Module itself (1) A-4/5 Exchange Module itself (2) A-5/5 LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 2 / 97 Only for training and service purposes...
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Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 3 / 97 Only for training and service purposes...
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No Video/ replace voltage? ( 3.5V,12V or 24V…) No audio MAIN B/D Replace Power Board and repair parts LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 4 / 97 Only for training and service purposes...
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Contact with signal distributor Tuner soldering Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 5 / 97 Only for training and service purposes...
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Request repair for external device/cable Check external External device HDMI/DVI device and /Cable Replace Main B/D error cable normal LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 6 / 97 Only for training and service purposes...
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(Check normal operation of normal? Main B/D External Input, Component, AV and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 7 / 97 Only for training and service purposes...
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※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 8 / 97 Only for training and service purposes...
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* Please refer to the all cases which can be displayed on power off mode. Click the below Hyper_link LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 9 / 97 Only for training and service purposes...
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Change the TV Speaker Replace Power Board and repair parts Check Speaker Disconnection Replace MAIN Board disconnection Replace Speaker / Cable LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 10 / 97 Only for training and service purposes...
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Connect and check Normal Check and fix other external device audio? external device Check and fix external device LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 11 / 97 Only for training and service purposes...
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If R/C operate, Normal Close Explain the customer operating? cause is interference from light in room. Replace R/C LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 12 / 97 Only for training and service purposes...
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Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 13 / 97 Only for training and service purposes...
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“Part related to nose” in the Owner’s Manual. as shown in the solution manual (For models without any fix information, provide the description) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 14 / 97 Only for training and service purposes...
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☞A28 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 15 / 97 Only for training and service purposes...
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D. Function error_ No response in remote Remote controller operation checking method controller, key error D. VCOM Adjustment Sequence of the Vcom adjustment LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 16 / 97 Only for training and service purposes...
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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. enter the value after replacing the MAIN BOARD. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 17 / 97 Only for training and service purposes...
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- 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 18 / 97 Only for training and service purposes...
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- signal test - select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 19 / 97 Only for training and service purposes...
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1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 20 / 97 Only for training and service purposes...
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LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 21 / 97 Only for training and service purposes...
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2. After measuring each voltage from power supply, finally replace the MAIN BOARD.( with Main to Power Cable, Speaker Cable and LVDS or EPI Cable) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 22 / 97...
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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!) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 23 / 97 Only for training and service purposes...
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Brightness and Duration ST-BY condition: Red or Logo Light ON Power ON condition: OFF or User Settings LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 24 / 97 Only for training and service purposes...
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- 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 25 / 97 Only for training and service purposes...
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- 24Pin wafer is applied operating L/D at power and main B/D - 18Pin wafer is applied not operating L/D at power and main B/D LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 26 / 97 Only for training and service purposes...
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1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 27 / 97 Only for training and service purposes...
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1. Press the MENU button on the remote controller 2. Select the SOUND function of the Menu 3. Select TV Speaker from Others LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 28 / 97 Only for training and service purposes...
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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. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 29 / 97 Only for training and service purposes...
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When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 30 / 97 Only for training and service purposes...
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■ Push the OK key to store the value. Then the message “Saving OK” is pop. ■ Press the exit key to finish V-COM adjustment. LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 31 / 97 Only for training and service purposes...
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POWER_OFF_BY_MCU Abnormal for 15 sec. POWER_OFF_BY_1SEC_POWER_OFF POWER_OFF_BY_MCU Abnormal status with Power Off Key POWER_OFF_BY_20VMNT POWER_OFF_BY_abnormal Panel status (Only OLED) LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 32 / 97 Only for training and service purposes...
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Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 33 / 97 Only for training and service purposes...
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Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack GRADATION Noise GRADATION LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 34 / 97 Only for training and service purposes...
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Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 35 / 97 Only for training and service purposes...
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Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 36 / 97 Only for training and service purposes...
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Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect LGE Internal Use Only Copyright ⓒ 2015 LG Electronics. Inc. All right reserved. 37 / 97 Only for training and service purposes...