LG 42LN5700 Service Manual

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Owner's manual (52 pages)

Specifications (2 pages)

User manual (203 pages)

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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 : LT33B MODEL : 42LN5700 42LN5700-DH CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67686905 (1302-REV00) Printed in Korea...
Page 2 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION .............. 17 BLOCK DIAGRAM .................. 25 EXPLODED VIEW .................. 35 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 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. LGE Internal Use Only Only for training and service purposes...
Page 6 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC: CE, IEC - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 Normal : LC470DUE-SFR1 [47LN5700-DH] 55” Normal : LC550DUK-SEE1 [55LN5700-DC] 60Hz Direct 32” 39.2 LC320DXE-SFR1 [32LN570B (HD)] (32/42/47”) LC320DUE-SFR1 [32LN5700(FHD)] POLA (55”) - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 630 x 630 LC550EUN-SFF1 [55LA6400-DA] 630 x 630 LC550EUJ-SEK1 [55LA6200-DA] 630 x 630 LC550EUJ-SEE1 [55LM5700-DC] 60” 687 x 687 LC600DUK-SEF1 [60LA6200-DA] - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 Display Colors 1.06 B (10-bit) Except FHD 60Hz models 16.7 M (8-bit) FHD/HD 60Hz models Coating 3H(Hard coating), Anti-glare - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 HDTV 1080P 1920*1080 26.97 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.00 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 63.981 60.020 109.00 SXGA Only FHD Model (Support to HDMI-PC) 1920*1080 67.5 158.40 WUXGA (Reduced Blanking) Only FHD Model - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 HDTV 1080P 2D to 3D Side by Side(half), Top & Bottom, Checkerboard, Single Frame Sequential, Row Interleaving, Column Interleaving - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 13 148.35/148.5 Frame packing Primary(HDTV 720P) Line alternative (HDTV 720P) 44.96 / 45 59.94 / 60 148.35/148.5 Side-by-side(Full) (HDTV 720P) - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 Top & Bottom, Checker Board, Single Frame Sequential Row Interleaving, Column Interleaving Others 2D to 3D 640*350 720*400 640*480 800*600 1152*864 - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 Side by Side(half) Top & Bottom 1920*1080 33.71 29.97 74.176 2D to 3D, HDTV 1080P Side by Side(half) Top & Bottom - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 16 Side by Side(Half)*, Top & Bottom*, Checkerboard* Row Interleaving, Column Interleaving (Photo : side by Side(half), Top & Bottom) - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 17: Adjustment Instruction
▪ Using RS-232C ▪ PING Test ▪ Selection Factory output option 4.1.6. Inspection - In INSTART menu, check these keys. - 17 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 NG 03 02x (Failed condition) OK 03 03x (Success condition) (7) End of Adjustment ad 00 90 d 00 OK90x - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 ▪ After Set Tool Option, then TV turn off and on finish auto download * EDID data for 3DTV (LA62/64/66/68/69/74 Seriese) (Model name = LG TV ) . *Rev. 15xxx to confirm that, Rev. up subject to change - HDMI EDID table...
Page 20 B Gain H/R Time(Min) R Gain G Gain B Gain 6-10 11-20 21-30 31-40 41-50 51-80 81-119 Over 120 - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 21 For correct it to the model’s module from factory JIG model. ※ Push The “IN STOP KEY” after completing the function inspection. - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 22 “Option” Menu with “PIP CH-“ Button ▪ Select one of these three (USA, CANADA, MEXICO) defends on its market using “Vol. +/-“button. - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 Else -> NG (4) LEAKAGE CURRENT: At 0.5mArms ※ Caution : Don’t push The INSTOP KEY after completing the function inspection. - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 (6) After download is finished, remove the USB stick. (7) Press “IN-START” key of ADJ remote control, check the S/W version - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 35: Exploded View
X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. - 35 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 MID_MAIN_1 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 37 MID_MAIN_2 2011.12.19 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 38 MID_MAIN_3 2011.12.09 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 39 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR ONE SIDE Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 40 2011.11.25 MID_POWER ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 41 2012.02.22 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 42 HDMI 4 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 43 JACK HIGH / MID 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 44 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 45 IR / KEY 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 46 USB2_USB3 2012.7.11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 47 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 48 JACK_COMMON 2011.11.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 49 LAN_VERTICAL 2012.03.08 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 50 2011.11.21 AMP_NEO ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 51 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 52 TUNER 2012.03.08 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 53 TUNER 2012.07.10 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 54 LVDS_HIGH_MID 2011.08.11 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 55 LOCAL DIMMING 2011.12.13 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 56 2011.12.01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 57 2011.12.01 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. T-Con Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 58 11.09.29 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 59 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 61 APPENDIX Power Off History First of all, Check whether there is SVC Bulletin in GCSC System for these model. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 1 / 97 Only for training and service purposes LGE Internal Use Only...
Page 62 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 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 2 / 97 Only for training and service purposes LGE Internal Use Only...
Page 63 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 3 / 97 Only for training and service purposes LGE Internal Use Only...
Page 64 No Video/ replace voltage? No audio ( 3.5V,12V or 24V…) MAIN B/D Replace Power Board and repair parts Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 4 / 97 Only for training and service purposes LGE Internal Use Only...
Page 65 Contact with signal distributor Tuner soldering Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 5 / 97 Only for training and service purposes LGE Internal Use Only...
Page 66 Request repair for external device/cable Check external External device HDMI/DVI device and /Cable Replace Main B/D error cable normal Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 6 / 97 Only for training and service purposes LGE Internal Use Only...
Page 67 (Check normal operation of normal? Main B/D External Input, Component, AV and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 7 / 97 Only for training and service purposes LGE Internal Use Only...
Page 68 ※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 8 / 97 Only for training and service purposes LGE Internal Use Only...
Page 69 Power B/D Part * Please refer to the all cases which can be displayed on power off mode. Click the below Hyper_link Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 9 / 97 Only for training and service purposes...
Page 70 Change the TV Speaker Replace Power Board and repair parts Check Speaker Disconnection Replace MAIN Board disconnection Replace Speaker / Cable Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 10 / 97 Only for training and service purposes LGE Internal Use Only...
Page 71 Connect and check Normal Check and fix other external device audio? external device Check and fix external device Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 11 / 97 Only for training and service purposes LGE Internal Use Only...
Page 72 If R/C operate, Normal Close Explain the customer operating? cause is interference from light in room. Replace R/C Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 12 / 97 Only for training and service purposes LGE Internal Use Only...
Page 73 Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 13 / 97 Only for training and service purposes LGE Internal Use Only...
Page 74 “Part related to nose” in the Owner’s Manual. as shown in the solution manual (For models without any fix information, provide the description) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 14 / 97 Only for training and service purposes LGE Internal Use Only...
Page 75 ☞A28 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 15 / 97 Only for training and service purposes LGE Internal Use Only...
Page 76 D. Function error_ No response in remote Remote controller operation checking method controller, key error D. VCOM Adjustment Sequence of the Vcom adjustment Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 16 / 97 Only for training and service purposes LGE Internal Use Only...
Page 77 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. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 17 / 97 Only for training and service purposes...
Page 78 - 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 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 18 / 97 Only for training and service purposes...
Page 79 - signal test select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 19 / 97 Only for training and service purposes LGE Internal Use Only...
Page 80 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 20 / 97 Only for training and service purposes LGE Internal Use Only...
Page 81 LCD TV connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 21 / 97 Only for training and service purposes LGE Internal Use Only...
Page 82 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.( with Main to Power Cable, Speaker Cable and LVDS or EPI Cable) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 22 / 97...
Page 83 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 ⓒ 2013 LG Electronics. Inc. All right reserved. 23 / 97 Only for training and service purposes LGE Internal Use Only...
Page 84 LG Logo Light Brightness and Duration ST-BY condition: Red or Logo Light ON Power ON condition: OFF or User Settings Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 24 / 97 Only for training and service purposes LGE Internal Use Only...
Page 85 - 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 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 25 / 97 Only for training and service purposes...
Page 86 - 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 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 26 / 97 Only for training and service purposes...
Page 87 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 27 / 97 Only for training and service purposes LGE Internal Use Only...
Page 88 1. Press the MENU button on the remote controller 2. Select the SOUND function of the Menu 3. Select TV Speaker from Others Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 28 / 97 Only for training and service purposes...
Page 89 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 ⓒ 2013 LG Electronics. Inc. All right reserved. 29 / 97...
Page 90 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. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 30 / 97...
Page 91 ■ Push the OK key to store the value. Then the message “Saving OK” is pop. ■ Press the exit key to finish V-COM adjustment. Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 31 / 97 Only for training and service purposes...
Page 92 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) Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 32 / 97 Only for training and service purposes LGE Internal Use Only...
Page 93 Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 33 / 97 Only for training and service purposes LGE Internal Use Only...
Page 94 Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack GRADATION Noise GRADATION Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 34 / 97 Only for training and service purposes LGE Internal Use Only...
Page 95 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 35 / 97 Only for training and service purposes LGE Internal Use Only...
Page 96 Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 36 / 97 Only for training and service purposes LGE Internal Use Only...
Page 97 Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright ⓒ 2013 LG Electronics. Inc. All right reserved. 37 / 97 Only for training and service purposes LGE Internal Use Only...

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42ln5700-dh

LG 42LN5700 Service Manual

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Summary of Contents for LG 42LN5700

Page 3: Safety Precautions

Page 4: Servicing Precautions

Page 17: Adjustment Instruction

Page 25: Block Diagram

Page 35: Exploded View

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LG 42LN5700 Service Manual

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Summary of Contents for LG 42LN5700

Page 3: Safety Precautions

Page 4: Servicing Precautions

Page 17: Adjustment Instruction

Page 25: Block Diagram

Page 35: Exploded View

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