LG 75NANO85TNA/VNA

Все сервис мануалы для телевизоров LG: http://webos-forums.ru/topic3291.html LED TV SERVICE MANUAL CHASSIS : UBX2B MODEL : 75NANO85TNA 75NANO85VNA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL71696416 (2006-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 © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

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CONTENTS CONTENTS ............................................................................................... 2 SAFETY PRECAUTIONS ......................................................................... 3 SERVICING PRECAUTIONS..................................................................... 4 SPECIFICATION........................................................................................ 6 SOFTWARE UPDATE ............................................................................. 10 BLOCK DIAGRAM................................................................................... 11 EXPLODED VIEW ................................................................................... 12 ASSEMBLY / DISASSEMBLY GUIDE .................................................... 13 TROUBLE SHOOTING GUIDE ................................................. APPENDIX -2- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the 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. General Guidance Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet. An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check. power line. Use a transformer of adequate power rating as this Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.) from electrical shocks. and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity. damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC outlet and repeat AC voltage inadvertently introduced during the service operation. measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to If any fuse (or Fusible Resistor) in this TV receiver is blown, 0.5 mA. replace it with the specified. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and When replacing a high wattage resistor (Oxide Metal Film Resistor, repaired before it is returned to the customer. over 1 W), keep the resistor 10 mm away from PCB. Leakage Current Hot Check circuit Keep wires away from high voltage or high temperature parts. Before returning the receiver to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock. Leakage Current Cold Check(Antenna Cold Check) With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 MΩ and 5.2 MΩ. 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.

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SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or expo- NOTE: If unforeseen circumstances create conflict between the sure of the assembly. following servicing precautions and any of the safety precautions 3. Use only a grounded-tip soldering iron to solder or unsolder on page 3 of this publication, always follow the safety precau- ES devices. tions. Remember: Safety First. 4. Use only an anti-static type solder removal device. Some sol- der removal devices not classified as “anti-static” can generate General Servicing Precautions electrical charges sufficient to damage ES devices. 1. Always unplug the receiver AC power cord from the AC power 5. Do not use freon-propelled chemicals. These can generate source before; electrical charges sufficient to damage ES devices. a. Removing or reinstalling any component, circuit board 6. Do not remove a replacement ES device from its protective module or any other receiver assembly. package until immediately before you are ready to install it. b. Disconnecting or reconnecting any receiver electrical plug (Most replacement ES devices are packaged with leads elec- or other electrical connection. trically shorted together by conductive foam, aluminum foil or c. Connecting a test substitute in parallel with an electrolytic comparable conductive material). capacitor in the receiver. 7. Immediately before removing the protective material from the CAUTION: A wrong part substitution or incorrect polarity leads of a replacement ES device, touch the protective mate- installation of electrolytic capacitors may result in an explo- rial to the chassis or circuit assembly into which the device will sion hazard. be installed. 2. Test high voltage only by measuring it with an appropriate high CAUTION: Be sure no power is applied to the chassis or cir- voltage meter or other voltage measuring device (DVM, FET- cuit, and observe all other safety precautions. VOM, etc) equipped with a suitable high voltage probe. 8. Minimize bodily motions when handling unpackaged replace- Do not test high voltage by "drawing an arc". ment ES devices. (Otherwise harmless motion such as the 3. Do not spray chemicals on or near this receiver or any of its brushing together of your clothes fabric or the lifting of your assemblies. foot from a carpeted floor can generate static electricity suf- 4. Unless specified otherwise in this service manual, clean ficient to damage an ES device.) electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable General Soldering Guidelines non-abrasive applicator; 10 % (by volume) Acetone and 90 % 1. Use a grounded-tip, low-wattage soldering iron and appropri- (by volume) isopropyl alcohol (90 % - 99 % strength) ate tip size and shape that will maintain tip temperature within CAUTION: This is a flammable mixture. the range or 500 °F to 600 °F. Unless specified otherwise in this service manual, lubrication 2. Use an appropriate gauge of RMA resin-core solder composed of contacts in not required. of 60 parts tin/40 parts lead. 5. Do not defeat any plug/socket B+ voltage interlocks with which 3. Keep the soldering iron tip clean and well tinned. receivers covered by this service manual might be equipped. 4. Thoroughly clean the surfaces to be soldered. Use a mall wire- 6. Do not apply AC power to this instrument and/or any of its bristle (0.5 inch, or 1.25 cm) brush with a metal handle. electrical assemblies unless all solid-state device heat sinks Do not use freon-propelled spray-on cleaners. are correctly installed. 5. Use the following unsoldering technique 7. Always connect the test receiver ground lead to the receiver a. Allow the soldering iron tip to reach normal temperature. chassis ground before connecting the test receiver positive (500 °F to 600 °F) lead. b. Heat the component lead until the solder melts. Always remove the test receiver ground lead last. c. Quickly draw the melted solder with an anti-static, suction- 8. Use with this receiver only the test fixtures specified in this type solder removal device or with solder braid. service manual. CAUTION: Work quickly to avoid overheating the circuit CAUTION: Do not connect the test fixture ground strap to any board printed foil. heat sink in this receiver. 6. Use the following soldering technique. a. Allow the soldering iron tip to reach a normal temperature Electrostatically Sensitive (ES) Devices (500 °F to 600 °F) Some semiconductor (solid-state) devices can be damaged eas- b. First, hold the soldering iron tip and solder the strand ily by static electricity. Such components commonly are called against the component lead until the solder melts. Electrostatically Sensitive (ES) Devices. Examples of typical ES c. Quickly move the soldering iron tip to the junction of the devices are integrated circuits and some field-effect transistors component lead and the printed circuit foil, and hold it there and semiconductor “chip” components. The following techniques only until the solder flows onto and around both the compo- should be used to help reduce the incidence of component dam- nent lead and the foil. age caused by static by static electricity. CAUTION: Work quickly to avoid overheating the circuit 1. Immediately before handling any semiconductor component or board printed foil. semiconductor-equipped assembly, drain off any electrostatic d. Closely inspect the solder area and remove any excess or charge on your body by touching a known earth ground. Alter- splashed solder with a small wire-bristle brush. natively, obtain and wear a commercially available discharg- ing wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the unit under test. -4- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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IC Remove/Replacement 3. Solder the connections. Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced which the IC leads are inserted and then bent flat against the cir- component and adjacent components and the circuit board to cuit foil. When holes are the slotted type, the following technique prevent excessive component temperatures. should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique Circuit Board Foil Repair as outlined in paragraphs 5 and 6 above. Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit Removal board causing the foil to separate from or "lift-off" the board. The 1. Desolder and straighten each IC lead in one operation by following guidelines and procedures should be followed when- gently prying up on the lead with the soldering iron tip as the ever this condition is encountered. solder melts. 2. Draw away the melted solder with an anti-static suction-type At IC Connections solder removal device (or with solder braid) before removing To repair a defective copper pattern at IC connections use the the IC. following procedure to install a jumper wire on the copper pattern Replacement side of the circuit board. (Use this technique only on IC connec- 1. Carefully insert the replacement IC in the circuit board. tions). 2. Carefully bend each IC lead against the circuit foil pad and solder it. 1. Carefully remove the damaged copper pattern with a sharp 3. Clean the soldered areas with a small wire-bristle brush. knife. (Remove only as much copper as absolutely necessary). (It is not necessary to reapply acrylic coating to the areas). 2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern. "Small-Signal" Discrete Transistor 3. Bend a small "U" in one end of a small gauge jumper wire and Removal/Replacement carefully crimp it around the IC pin. Solder the IC connection. 1. Remove the defective transistor by clipping its leads as close 4. Route the jumper wire along the path of the out-away copper as possible to the component body. pattern and let it overlap the previously scraped end of the 2. Bend into a "U" shape the end of each of three leads remain- good copper pattern. Solder the overlapped area and clip off ing on the circuit board. any excess jumper wire. 3. Bend into a "U" shape the replacement transistor leads. 4. Connect the replacement transistor leads to the corresponding At Other Connections leads extending from the circuit board and crimp the "U" with Use the following technique to repair the defective copper pattern long nose pliers to insure metal to metal contact then solder at connections other than IC Pins. This technique involves the each connection. installation of a jumper wire on the component side of the circuit board. Power Output, Transistor Device Removal/Replacement 1. Remove the defective copper pattern with a sharp knife. 1. Heat and remove all solder from around the transistor leads. Remove at least 1/4 inch of copper, to ensure that a hazardous 2. Remove the heat sink mounting screw (if so equipped). condition will not exist if the jumper wire opens. 3. Carefully remove the transistor from the heat sink of the circuit 2. Trace along the copper pattern from both sides of the pattern board. break and locate the nearest component that is directly con- 4. Insert new transistor in the circuit board. nected to the affected copper pattern. 5. Solder each transistor lead, and clip off excess lead. 3. Connect insulated 20-gauge jumper wire from the lead of the 6. Replace heat sink. nearest component on one side of the pattern break to the lead of the nearest component on the other side. Diode Removal/Replacement Carefully crimp and solder the connections. 1. Remove defective diode by clipping its leads as close as pos- CAUTION: Be sure the insulated jumper wire is dressed so the sible to diode body. it does not touch components or sharp edges. 2. Bend the two remaining leads perpendicular y to the circuit board. 3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. 4. Securely crimp each connection and solder it. 5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder. Fuse and Conventional Resistor Removal/Replacement 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.

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SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to the LED TV used UBX2B (1) Performance: LGE TV test method followed chassis. (2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC specification 2. Requirement for Test Each part is tested as below without special notice (1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 2 °C (2) Relative Humidity: 60 % ± 10 % (3) Power Voltage : Standard input voltage (AC 100-240 V~, 50/60 Hz) * Standard Voltage of each products is marked by models. (4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM. (5) The receiver must be operated for about 20 minutes prior to the adjustment. 4. Model General Specification No. Item Specification Remarks 1 Market Oceania / Asia / Middle East / Africa (1) Digital TV : DVB-T/T2, DVB-C, DVB-S/S2 2 Television system (2) Analogue TV : P AL B/B, PAL B/G, PAL D/K, PAL-I, SECAM Only *V* models supprot DVB-S/S2 B/G, SECAM D/K, NTSC-M (1) ATV & DVB-T/T2 : 3,000EA 3 Program coverage Only *V* models supprot DVB-S/S2 (2) DVB-S/S2 : 6,000EA ► DVB-T - Guard Interval(Bitrate_Mbit/s): 1/4, 1/8, 1/16, 1/32 - Modulation : Code Rate QPSK : 1/2, 2/3, 3/4, 5/6, 7/8 16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 ► DVB-T2 - Guard Interval(Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256, - Modulation : Code Rate QPSK : 1/2, 2/5, 2/3, 3/4, 5/6 Analogue : Upper Heterodyne 16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 4 Receiving system Digital : COFDM, QAM 64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6 ► DVB-C - Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s - Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM ► DVB-S/S2 (only *V* models) - Symbolrate DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s DVB-S (QPSK) : 2 ~ 45Msymbol/s - Code rate DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8 DVB-S2 mode: 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10 HDMI 1 Support 4K: 12Gbps, 8K: 10Gbps HDMI 2 Support 4K: 12Gbps, 8K: 10Gbps, Support ARC 5 HDMI Input PC / DTV Format HDMI 3 Support 4K: 12Gbps, 8K: 10Gbps HDMI 4 Support 4K: 12Gbps, 8K: 10Gbps (Depending on model) 6 USB Input My Media(Movie/Photo/Music List) or SVC 3EA 7 Component Input Y/Pb/Pr Except NANO85/90/95/99 for Middle East and Africa 8 Video Input PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60 9 Audio Input DVI Audio, Component, AV 10 SPDIF out Optical Audio out 11 Headphone out Antenna, HDMI1, HDMI2, HDMI3, HDMI4 USB1, USB2, USB3 Except UBX3D/UBX3E 12 Ethernet Connect -6- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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5. External Input Format 5.1. Component (Y, PB, PR) No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed 1 720*480i 15.73 59.94 13.5 SDTV, DVD 480I(525I) 2 720*480i 15.75 60 13.514 SDTV, DVD 480I(525I) 3 720*576i 15.62 50 13.5 SDTV, DVD 576I(625I) 50Hz 4 720*480p 31.47 59.94 27 SDTV 480P 5 720*480p 31.5 60 27.027 SDTV 480P 6 720*576p 31.25 50 27 SDTV 576P 50Hz 7 1280*720 44.96 59.94 74.176 HDTV 720P 8 1280*720 45 60 74.25 HDTV 720P 9 1280*720 37.5 50 74.25 HDTV 720P 50Hz 10 1920*1080 28.12 50 74.25 HDTV 1080I 50Hz 11 1920*1080 33.72 59.94 74.176 HDTV 1080I 12 1920*1080 33.75 60 74.25 HDTV 1080I 13 1920*1080 56.25 50 148.5 HDTV 1080P 14 1920*1080 67.43 59.94 148.5 HDTV 1080P 15 1920*1080 67.5 60 148.5 HDTV 1080P -7- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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5.2. HDMI 5.2.1. DTV mode No. Resolution H-freq(kHz) V-freq(kHz) Pixel clock(MHz) Proposed Remarks 1 640*480 31.46 59.94 25.12 SDTV 480P 2 640*480 31.5 60 25.12 SDTV 480P 3 720*480 31.47 59.94 27 SDTV 480P 4 720*480 31.5 60 27.02 SDTV 480P 5 720*576 31.25 50 27 SDTV 576P 6 1280*720 44.96 59.94 74.17 HDTV 720P 7 1280*720 45 60 74.25 HDTV 720P 8 1280*720 37.5 50 74.25 HDTV 720P 9 1920*1080 28.12 50 74.25 HDTV 1080I 10 1920*1080 33.72 59.94 74.17 HDTV 1080I 11 1920*1080 33.75 60 74.25 HDTV 1080I 12 1920*1080 26.97 23.97 63.29 HDTV 1080P 13 1920*1080 27 24 63.36 HDTV 1080P 14 1920*1080 33.71 29.97 79.12 HDTV 1080P 15 1920*1080 33.75 30 79.2 HDTV 1080P 16 1920*1080 56.25 50 148.5 HDTV 1080P 17 1920*1080 67.43 59.94 148.35 HDTV 1080P 18 1920*1080 67.5 60 148.5 HDTV 1080P 19 1920*1080 112.5 100 297 UDTV 2160P 20 1920*1080 134.86 119.88 296.7 UDTV 2160P 21 1920*1080 135 120 297 UDTV 2160P 22 3840*2160 53.95 23.98 296.7 UDTV 2160P 23 3840*2160 54 24 297 UDTV 2160P 24 3840*2160 56.25 25 297 UDTV 2160P Not Support for FHD. 25 3840*2160 61.43 29.97 296.7 UDTV 2160P 26 3840*2160 67.5 30 297 UDTV 2160P 27 3840*2160 112.5 50 594 UDTV 2160P 28 3840*2160 134.86 59.94 593.4 UDTV 2160P 29 3840*2160 135 60 594 UDTV 2160P 30 3840*2160 225 100 1188 UDTV 2160P 4K120 model (K6Hp HDMI 31 3840*2160 269.73 119.88 1186.8 UDTV 2160P 3,4 port, O20) or 8K model 32 3840*2160 270 120 1188 UDTV 2160P 33 4096*2160 53.95 23.98 296.7 UDTV 2160P 34 4096*2160 54 24 297 UDTV 2160P 35 4096*2160 56.25 25 297 UDTV 2160P 36 4096*2160 61.43 29.97 296.7 UDTV 2160P Not Support for FHD. 37 4096*2160 67.5 30 297 UDTV 2160P 38 4096*2160 112.5 50 594 UDTV 2160P 39 4096*2160 134.86 59.94 593.4 UDTV 2160P 40 4096*2160 135 60 594 UDTV 2160P 41 4096*2160 225 100 1188 UDTV 2160P 4K120 model (K6Hp HDMI 42 4096*2160 269.73 119.88 1186.8 UDTV 2160P 3,4 port, O20) or 8K model 43 4096*2160 270 120 1188 UDTV 2160P 44 7680*4320 107.89 23.98 1188 8K 45 7680*4320 108 24 1188 8K 46 7680*4320 110 25 1188 8K 47 7680*4320 131.87 29.97 1188 8K 8K Model Only. 48 7680*4320 132 30 1188 8K 49 7680*4320 220 50 2376 8K 50 7680*4320 263.74 59.94 2376 8K 51 7680*4320 264 60 2376 8K -8- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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5.2.2. PC mode No. Resolution H-freq(kHz) V-freq(kHz) Pixel clock(MHz) Proposed Remarks 1 640*350 31.46 70.09 25.17 EGA 2 720*400 31.46 70.08 28.32 DOS 3 640*480 31.46 59.94 25.17 VESA(VGA) 4 800*600 37.87 60.31 40 VESA(SVGA) 5 1024*768 48.36 60 65 VESA(XGA) 6 1360*768 47.71 60.01 84.75 VESA(WXGA) 7 1152*864 54.34 60.05 80 VESA 8 1280*1024 63.98 60.02 109 SXGA Support to HDMI-PC WUXGA 9 1920*1080 67.5 60 158.4 (Reduced Blanking) 10 1920*1080 134.86 119.88 296.7 UDTV 2160P 11 1920*1080 135 120 297 UDTV 2160P 12 3840*2160 53.95 23.98 296.7 UDTV 2160P 13 3840*2160 54 24 297 UDTV 2160P 14 3840*2160 56.25 25 297 UDTV 2160P 15 3840*2160 61.43 29.97 296.7 UDTV 2160P 16 3840*2160 67.5 30 297 UDTV 2160P 17 3840*2160 112.5 50 594 UDTV 2160P 18 3840*2160 134.86 59.94 593.4 UDTV 2160P Not Support for FHD. 19 3840*2160 135 60 594 UDTV 2160P 20 4096*2160 53.95 23.98 296.7 UDTV 2160P 21 4096*2160 54 24 297 UDTV 2160P 22 4096*2160 56.25 25 297 UDTV 2160P 23 4096*2160 61.43 29.97 296.7 UDTV 2160P 24 4096*2160 67.5 30 297 UDTV 2160P 25 4096*2160 112.5 50 594 UDTV 2160P 26 4096*2160 134.86 59.94 593.4 UDTV 2160P 27 4096*2160 135 60 594 UDTV 2160P (UHD 60Hz models only), Sup- 28 2560*1440 88.78 59.95 241.5 3K port only when UHD DeepColor is On (UHD, 8K 120Hz models only), 29 2560*1440 182.99 119.99 497.7 3K Support only when UHD Deep- Color is On -9- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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SOFTWARE UPDATE 1. USB DOWNLOAD 2. NSU DOWNLOAD (1) Insert the USB memory Stick to the USB port. (This Function is needed to connect to the internet.) (2) Automatically detect the SW Version and show the below message. (1) Menu → All Settings → Support → Software Update (3) Click [YES]: initiate the download and install of the update. (2) Click [CHEK FOR UPDATES]: system check newest version. (4) Click [Check Now]: move to “About This TV” page for update. (3) Click [DOWNLOAD AND INSTALL]. (5) TV is updating. (4) TV is updating. (6) After finished the update, below Pop-up appear. (5) After finished the update, below Pop-up appear. (7) Click [Yes] : TV will be DC OFF → ON. (6) Turn OFF the TV and On. Check the updated SW Version (8) After TV turned on, Check the updated SW Version and and Tool Option. Tool Option. - 10 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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X_TAL 24MHz T2/C/S2 Tuner (w/o D-Demod D- od) Air/ IF+, IF- I2C 1 Cable TUNER R SIF KGD DDR4 (C/A) E CVBS (2GB) A R I2C 5 EEPROM(NVRAM) I_P, I_N, Q_P, Q_N Satellite TUNER (256Kb) I2C 2 (S/S2) P_TS(JP only) eMMC (8GB) Depend on Region USB3 (2.0) OCP USB3_0 PMIC Vertical USB2 (2.0) OCP USB2_2 USB1 (2.0) OCP USB2_1 I2C 3 Sub PMIC IC100 EPI - 11 - HDMI1 HDMI 2.0 PHY3_RX0N I2S Out MAIN Audio AMP HDMI2 HDMI 2.0 PHY2_RX0N I2C 0 (SY6045) Side HDMI3(ARC/eARC) HDMI 2.1 PHY1_RX0N HDMI4 HDMI 2.1 PHY0_RX0N BLOCK DIAGRAM Copyright © RS232C/HP H/P USB_WIFI WIFI/BT Combo Depend on Region AMP SUB CVBS/COMP YPbPr AV ASSY IR / KEY LAN ETHERNET 4 directions 1 direction OPTIC SPDIF OUT Only for training and service purposes. LG Electronics Inc. All rights reserved.

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EXPLODED VIEW IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the 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. 900 400 810 HW1 570 411 540 120 HP1 500 LV2 HS1 530 LV1 810 121 700 A10 200A 200 AR2 - 12 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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ASSEMBLY / DISASSEMBLY GUIDE 1. Back Cover Handling Guide ▪ Handling Guide by a worker ▪ Handling Guide by 2 workers - Hold it with both hands and about 600mm(shoulder width) of longer side - Hold 4 corners of it standing state by 2 workers ▪ Handling Guide holding 4 corners of it - Hold it with both hands - Hold Top of Middle of it (Do not handle laying it down.) and about 600mm and Stand Assembling (shoulder - width) part(the lower red circle) - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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2. Back Cover Unpacking Guide Step 4. take out it from a box after standing it vertically Move the hands which hold top of it to both sides of it Step 1. Check positions of Workers 1,2 Worker 1: Top of B/C Worker 2: Right side of it Worker_2 Worker 1 Line flow direction Step 2. The way to Lift it from a box (1) Worker 1 lift it holding top of it by 2 hands keeping 60~100 Step 5. Take out it from a box. cm distance Take out it from a box lifting vertically with holding both sides of it Position of hands Step 3. The way to Lift it from a box (2) Worker 1 moves to left side of it holding top and Worker 2 also holds top of it. And then, Worker 1, 2 lift it together. Step 6. Take out it from a box. Move forward to front of box taking out it completely. Position of hands - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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Step 7. Change holding position of hands (1) Step 10. Put down it on a Module (2) Change hands before moving to module. First of all, Deliver Top side of it to Worker 3. Please refer to above picture. Step 8. Change holding position of hands (2) Change hands before moving to module. Please refer to above picture. Step 11. Put down it on a Module (3) Worker 3 holding top side , Worker 1,2 match bottom, right and left side of it and then put down it on a module. Step 9. Put down it on a Module (1) Worker 3 must prepare to receive of it on the opposite side. Worker 2 Worker 1 Step 12. Put down it on a Module (4) Worker 3 As pushing latches smoothly, Worker 1,2 assemble right and left side of it . Worker 3 assemble top of it. - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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3. Back Cover Disassembly Guide (1) Lay the set on a flat Pad. And than remove Screw and Power Cord Bracket. (2) Recognize B/C Latch Points, and ready to remove B/C. Holder 8 Points Screw 17 Points Latch 4 Points Back Cover Curling shape Cover Bottom+ Holder B/C Assembly = Module (Holder) + B/C (Curling) - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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(3) Using Plastic Scrapper, Make space between B/C and Module. And with the back cover raised remove B/C using Plastic Scrapper. (remove direction : under → upper) Left Plastic Scrapper Plastic Scrapper Plastic Scrapper Up Up Up (4) Using Plastic Scrapper, Make space between B/C and Module. And with the back cover raised remove B/C using Plastic Scrapper. (remove direction : under → upper) Right Plastic Scrapper Plastic Scrapper Plastic Scrapper Up Up Up - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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(5) For remove Top Latch, with the back cover raised, remove B/C using Plastic Scrapper. (remove direction : outside → inside) Top(Left) Top(Right) Plastic Plastic Plastic Scrapper Scrapper Plastic Scrapper Scrapper Up Up Up Up (6) Two people grasp B/C, and remove B/C. (Grasp position : 600~800 mm) (7) B/C Handling is refer to 5Page B/C Handling Guide. - 18 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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4. Back Cover Latch Assemble Guide (1) After set B/C above Module, Push Latch Point in B/C Bending. (Push slope direction of B/C for preventing transform.) (2) Confirm Latch Assemble. (If Latch is not assemble, Gap and lifting are made.) B/C-Module Gap NG Ok Ok - 19 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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ASSEMBLY / DISASSEMBLY GUIDE (MODULE) 1. Disassemble of Cover Shield Disassemble the Screws Disassemble the source PCB from the guide Disassemble the FFC Tape Disassemble the FFC CNT 2. Disassemble of Guide panel screw UP/RIGHT/LEFT Total : 21ea 3. Disassemble of Case Top screw. - Screw 13ea - 20 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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4. Disassemble of screw 6ea 5. Disassemble Hooks. (UP 2ea, Left/Right each 1ea) About 465mm About 465mm About 25mm About 25mm 6. Panel and Guide Panel disassembly (using adsorber) 7. Removal of Sheets - 21 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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8. Removal of LGP LED 9. Removal of Reflector LED 10. Removal of LED Housing Assy - 22 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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TROUBLE SHOOTING GUIDE Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Contents of Standard Repair Process No. Error symptom (High category) Error symptom (Mid category) Page Remarks 1 No video/Normal audio 1 2 No video/No audio 2 3 Picture broken/ Freezing 3 A. Video error 4 Color error 4 Vertical/Horizontal bar, residual image, light 5 5 spot, external device color error 6 No power 6 Off when on, off while viewing, power auto 7 7 B. Power error on/off Off when on, off while viewing, power auto 8 8 on/off 9 No audio/Normal video 9 C. Audio error 10 Wrecked audio/discontinuation/noise 10 11 Remote control & Local switch checking 11 12 MR20 operating checking 12 D. Function error 13 Wifi operating checking 13 14 External device recognition error 14 15 E. Noise Circuit noise, mechanical noise 15 16 F. Exterior error Exterior defect 16 First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error A. Video error date symptom No video/ Normal audio Revised date First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, Each Cable for Panel, Speaker Cable, IR B/D Cable,,,) ☞A1 ☞A9 Y Y Y No video Normal Check Back Light Check Power Board Normal Replace T-con/Main On Normal audio audio On with naked eye 13.2V etc. voltage Board or module N N N ☞A9 Move to No Check Power Board VLED output Repair Power video/No audio Board or parts ☞A10 Y LED Y Normal Error Check LED Driver BD Replace LED Driver BD voltage by LED indicator Driver BD error N N Repair Power Replace Module End End Board or parts ※Precaution ☞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 1 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error A. Video error date symptom No video/ No audio Revised date ☞A9 No Video/ Check various Check and Normal Y No audio voltages of Power replace Board (13.2V…) voltage? MAIN B/D N End Replace Power Board and repair parts 2 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error A. Video error date symptom Picture broken/ Freezing Revised date . By using Digital signal level meter ☞ A3 . By using Diagnostics menu on OSD Check RF Signal level ( Advanced→ Channels→ Channel Tuning→ Manual Tuning → Check the Signal ) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not. Normal Y (By connecting RF Cable at other equipment) Signal? → DVD Player ,Set-Top-Box, Different maker TV etc` N ☞ A4 Check RF Cable Normal Y Check SVC N Check Tuner Y Connection Close 1. Reconnection Picture? S/W Version Bulletin? soldering 2. Install Booster Y N N S/W Upgrade N Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Replace Normal N Main B/D Y Picture? Y Close Close 3 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error A. Video error date symptom Color error Revised date ☞ A7 ☞A6 ※ Check and Check color by input replace Link -External Input Y Cable Y Y Color Color Color -AV (EPI or Vx1 Replace Main B/D Replace module error? error? error? -HDMI Cable) and N contact N N condition End Check error color input mode ☞A20 External Input/ Check external External Y Check Test pattern Component device and device/Cable Replace Main/T-con B/D error cable normal N Request repair for external device/cable N Check external External Y HDMI device and device/Cable Replace Main/T-con B/D error cable normal 4 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process A. Video error Established Error date symptom Vertical / Horizontal bar, residual image, light spot, external device color error Revised date Vertical/Horizontal bar, residual image, light spot Replace Module ☞A6 Check ☞ A7 N Check color condition by input external Check and Screen Y Y Screen N Replace Main/T-con B/D Screen -External Input device Normal? replace Link normal? normal? normal? -HDMI connection Cable condition For LGD panel N N Y Y Replace Main B/D Replace module Request repair End End for external For other panel device External device screen error-Color error Check screen N condition by input External Connect other external Check S/W Check Input -External Input device and cable Version version error N Replace -Component (Check normal operation of Screen -HDMI/DVI External Input, Component, Main/T-con normal? Y RGB and HDMI/DVI by B/D Component connecting Jig, pattern error Y S/W Upgrade Generator ,Set-top Box etc. Request repair for external device Normal N Y Connect other external screen? device and cable (Check normal operation of N Replace HDMI/ Screen Y External Input, Component, Main /T-con DVI normal? RGB and HDMI/DVI by B/D End connecting Jig, pattern Generator ,Set-top Box etc. 5 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error B. Power error date symptom No power Revised date ☞A8 ☞A9 DC Power on Replace Check Power LED Y Normal N Check Power Y by pressing Power Key OK? Power LED On? operation? On ‘”High” On Remote control B/D . Stand-By: Red or Turn On N Y . Operating: Turn Off Check Power cord Replace Main B/D was inserted properly ☞A9 Measure voltage of each output of Power B/D N Normal? Y Y Y Normal Replace Main B/D voltage? Normal Close Check ST-BY 3.5V Y voltage? N ☞A9 Replace Power B/D N Replace Power B/D 6 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error B. Power error date symptom Off when on, off while viewing, power auto on/off Revised date Check outlet ☞A11 N Check Power Off Y CPU Check A/C cord Error? Replace Main B/D Normal? End Mode Abnormal N Check for all 2- phase Y Abnormal Replace Power B/D power out 1 Fix A/C cord & Outlet and check each 2 ☞A9 phase out (If Power Off mode is not displayed) Normal Y Replace Main B/D Check Power B/D voltage? voltage N ※ Caution Check and fix exterior Replace Power B/D of Power B/D Part 7 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error B. Power error date symptom Off when on, off while viewing, power auto on/off Revised date * Please refer to the all cases which can be displayed on power off mode. Power Off list Explanation Action contents Power off when TV is not turned off during a certain time KEYTIMEOUT RESULT : micom force to trigger TV power off. Check & Change Main B/D CONDITION : When pressing power key while power on/off status, CPU does not response within 8 seconds Almost the same as Power Off by KEYTIMEOUT. If there is no vaild communication Bet ween CPU and MICOM for more than 5 seconds, the MICOM switcheds off PSU and 1SEC Power OFF Check & Change Main B/D Records. Power off by 1SEC Power off. In this case, we don’t have information where the malfunction exactly occurred. But in in indicates that CPU had stopped and rebooted. In case of AC Off (It is normal when the power cord is unplugged.) Normal ACDET If there are many ACDETs connected, Power Board is defective Check & Change Power B/D Power off by unstable AC power detect. RESULT : micom check the stable power. 5V MNT Check & Change Power B/D CONDITION : When AC on or DC on, stabilization check routine (Power Detect High Check) fail after multi power on. CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure. Check & Change Main B/D Power off when receiving no ack. NO POLING RESULT : TV power off/on (Reboot) Check & Change Main B/D CONDITION : There is no I2C response from CPU for 15 seconds. CPUCMD Power off by main SoC command. Check & Change Main B/D Power off by module error (OLED) INV_ERROR Check & Change OLED Module CONDITION : OLED Module send signal to micom ONRF_FAIL RESULT : Reboot, CONDITION : OLED module compensation is running but fails. Check & Change OLED Module PNWASHFAIL Power off by panel noise wash function fail case. Check & Change OLED Module RESET When Micom is reset by AC Off KEY Power off by Local key OFFTIMER Power off by Off timer SLEEPTIMER Power off by sleep timer NOSIG Power off by No Signal FANSTOP Power off by FAN operation stopped INSTOP Power off by Instop Key Normal Case AUTO OFF Power off by auto off function RESREC Power off by reserved recording RECEND Power off when recording stops SWDOWN 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) 8 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error C. Audio error date symptom No audio/ Normal video Revised date ☞A12 ☞A13+A9 Check user N Check audio 13.2 V Y No audio Normal menu > Off or 20V of Power Screen normal voltage Speaker off Board Y N Cancel OFF Replace Power Board and repair parts Check Speaker N Disconnection Replace MAIN Board End disconnection Y Replace Speaker 9 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error C. Audio error date symptom Wrecked audio/ discontinuation/noise Revised date → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio Wrecked audio/ ☞A13+A9 Check and replace Discontinuation/ Check audio speaker and Noise for B+ Voltage (13.2V or 20V) connector Check input all audio signal Y Signal -RF normal? Wrecked audio/ Y -External Input Normal signal Discontinuation/ N Replace Main B/D voltage? Noise only for D-TV N Wrecked audio/ Discontinuation/ Replace Power B/D Noise only for Analog (When RF signal is not received) Request repair to external Wrecked audio/ Replace Main B/D End cable/ANT provider Discontinuation/ Noise only for External Input (In case of N External Input Connect and check Normal signal error) other external audio? Check and fix device external device Y Check and fix external device 10 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process D. Function error Established Error date symptom Remote control & Local switch checking Revised date 1. Remote control(R/C) operating error Replace Main B/D ☞A14 ☞A14 ☞A14 Check & Repair N Y Y Check R/C itself Normal Y Normal Check B+3.5V Normal Check IR Normal operating? Cable connection operating? Voltage? Signal? Operation On Main B/D Output signal Connector solder N Y N N ☞A9 Check R/C Operating Check & Replace Repair/Replace Close Replace Power B/D or When turn off light Baterry of R/C IR B/D in room Replace Main B/D (Power B/D don’t have problem) If R/C operate, Y Normal operating? Close Explain the customer cause is interference from light in room. N Replace R/C 11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process D. Function error Established Error date symptom MR20 operating checking Revised date 2. MR20(Magic Remote control) operating error ☞A4 Check the RF Receiver ver N Check MR20 Normal Y Press the Is show ok N Turn off/on the INSTART menu is “00.00”? itself Operation operating? wheel message? set and press the wheel N Y Y ☞A15 Check & Replace Close Check & Repair Battery of MR20 RF assy connection Normal Y ☞A4 operating? Close Is show ok N Press the back RF Receiver ver N N message? key about 5sec Close is “00.00”? Y Replace MR20 Y Close Down load the Firmware * If you conduct the loop at 3times, change the MR20. * INSTART MENU  14.RF Remote control Test  3. Firmware download 12 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process D. Function error Established Error date symptom Wifi operating checking Revised date 3.Wifi operating error ☞A4 ☞A15 Wi-Fi Mac Check the Wifi wafer N Check the N Normal Replace value is INSTART menu 1pin Voltage? Main B/D “NG”? Y ☞A15 Y Check & Repair Close Wifi cable connection ☞A4 N Wi-Fi Mac value Close is “NG”? Y Change the Wifi assy 13 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error D. Function error date symptom External device recognition error Revised date Check technical Check Y N External Input Signal information Technical input and Component Replace Main B/D input? - Fix information information? Recognition error signal - S/W Version N Y HDMI/ Check and fix DVI, Optical Fix in Replace Main B/D external device/cable Recognition accordance error with technical information 14 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error E. Noise date symptom Circuit noise, mechanical noise Revised date Identify Circuit Check location Replace PSU nose type noise of noise Mechanical Check location noise of noise ※ When the nose is severe, replace the module ※ Mechanical noise is a natural (For models with fix information, upgrade the phenomenon, and apply the 1st level S/W or provide the description) description. When the customer does not OR agree, apply the process by stage. ※ If there is a “Tak Tak” noise from the ※ Describe the basis of the description in cabinet, refer to the KMS fix information and “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) 15 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Established Error F. Exterior defect date symptom Exterior defect Revised date Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent 16 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Contents of Standard Repair Process Detail Technical Manual No. Error symptom Content Page Remarks 1 Check EPI Lock A1 A. Video error_ No video/Normal audio 2 Check White Balance value A2 TUNER input signal strength checking 3 A3 method A. Video error_ video error /Video 4 lag/stop Version checking method A4 5 Tuner Checking Part A5 A. Video error _Vertical/Horizontal bar, 6 Connection diagram A6 residual image, light spot Check Link Cable (Vx1/EPI) reconnection 7 A. Video error_ Color error A7 condition A-1/11 Check Cable (1) ~ (2) A-2/11 Exchange Main Board (1) ~ (3) A-3/11 ~ A-5/11 8 Defected Type caused by T-Con/ Inverter/ Module Exchange Module (1) ~ (3) A-6/11 ~ A-8/11 Exchange T-Con (1) ~ (2) A-9/11 ~ A-10/11 Exchange Power Board(PSU) A-11/11 Continue to the next page Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Contents of Standard Repair Process Detail Technical Manual Continued from previous page No. Error symptom Content Page Remarks 9 Check front display LED A8 10 Check power input Voltage & ST-BY 3.5V A9 B. Power error_ No power 11 Error check by LED Indicator A10 B. Power error_Off 12 POWER OFF MODE checking method A11 (when on/off, while viewing) 13 Checking method in menu when there is no audio A12 C. Audio error_ No audio/Normal video Voltage and speaker checking method when there is 14 A13 no audio 15 Remote control operation checking method A14 D. Function error 16 Magic Remote/WiFi operation checking method A15 17 How to use the Service remote control A16-A18 18 E. Etc Check items after Main B/D replacement A19 19 Adjustment Test pattern – ADJ Key A20 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_No video/Normal audio date Revised Content Check Back Light On with naked eye A1 date If the Black light LED assemble is ‘OK’, you can see the lights on each points. A1 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_No video/Normal audio date Revised Content Check White Balance value A2 date Entry method 1. Press the ADJ button on the remote control for adjustment. 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. A2 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_Video error, video lag/stop date TUNER input signal strength checking method Revised Content date A3 All settings  Programmes  Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) A3 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_Video error, video lag/stop date Version checking method Revised Content date A4 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment A4 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_Video error, video lag/stop date Revised Content TUNER checking part A5 date Checking method: 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. A5 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, Established symptom residual image, light spot date Revised Content connection diagram date A6 As the part connecting to the external input, check the screen condition by signal A6 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom A. Video error_Color error date Revised Content Check Link Cable(VX1/EPI) reconnection condition date A7 Check the contact condition of the Link Cable, especially dust or mis insertion. A7 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Image error) Check for poor cable contact Symptom Item Cause Symptom Image Name CABLE Color smear Poor broken pin of FFC cable Color is Excessive due to FFC Cable CABLE R Color Excessive Contact. screen is dark due to poor contact due CABLE 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Image error) Check for poor cable contact Symptom Item Cause Symptom Image Name CABLE Color spread LVDS cable connection problem CABLE Color spread LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Main) Check parts by symptom Symptom Item Cause Symptom Image Name Main Screen noise Bit noise from horizontal screen Broken screen due to Main Screen noise 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Main) Check parts by symptom Symptom Item Cause Symptom Image Name Main Broken screen Broken screen in a horizontal manner Main 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Main) Check parts by symptom Symptom Item Cause Symptom Image Name No problem at the initial stage, Main Broken picture G-color spread after 10 minutes Right-side Main Screen Right-side screen problem problem LG logo Main 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name Isometric Isometric horizontal bars occur MODULE Horizontal Bar throughout the screen MODULE Internal matter BLU internal foreign matter inflow MODULE Image broken 6 block image broken MODULE Image broken Screen sync signal broken A - 6/11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name Internal damage and image breakage MODULE Image broken due to external impact Bend on the Bending due to lateral external impact MODULE screen and internal bending of 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(Module) Check parts by symptom Symptom Item Cause Symptom Image Name MODULE Vertical bar Center Vertical Bar MODULE Screen darkness Center of the screen 1 block dark MODULE Vertical bar Center Vertical Bar Darkness at the MODULE bottom of the MODULE internal BLU breakage screen A - 8/11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(T-Con) Check parts by symptom Symptom Item Cause Symptom Image Name screen lower T-Con is defective and the picture below T-CON image broken the screen is broken screen lower T-Con is defective and the picture below T-CON image broken the screen is broken screen lower T-Con is defective and the picture below T-CON image broken the screen is broken screen lower T-Con is defective and the picture below T-CON image broken the screen is broken A - 9/11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix. Examples of Symptoms(T-Con) Check parts by symptom Symptom Item Cause Symptom Image Name T-CON Wafer Locking The strength is T-CON Image Broken weak and cable contact failure occurs Darkness at the Initial normal operation, T-CON top of the screen upper darkness during heat run 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 © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom B. Power error _No power date Revised Content Check front Power Indicator date A8 ST-BY condition: On or Off Power ON condition: Turn Off A8 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom B. Power error _No power date Revised Content Check power input voltage and ST-BY A9 date Power Board Voltage and Current Value Check Voltage DC 13.2V line ST-BY All condition meets, Power Board OK. A9 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom B. Power error _No power date Revised Content Error check by LED Indicator A10 date LED Indicator error condition (UHD Mid/High model only) 1. LED Indicator blank in each abnormal condition (Repeat each 6sec) 2. Abnormal condition 1) Open LED Protection 2) Short LED Protection 3) DC/DC voltage level check 4) P-Dim1 error 5) Driver on signal error 6) Local dimming data error 7) Driver IC error or MCU error check 8) V-sync error A10 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error symptom B. Power error _Off when on, off whiling viewing Established date Revised Content POWER OFF MODE checking method date A11 Entry method 1. Press the IN-START button of the remote control for adjustment. 2. Check the entry into adjustment item 3. A11 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom C. Audio error_No audio/Normal video date Revised Content Checking method in menu when there is no audio date A12 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. A12 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom C. Audio error_No audio/Normal video date Voltage and speaker checking method Revised Content date A13 when there is no audio ① ② Please refer to A9 for detail pin map ③ 2 SPK_ R-FT 1 SPK_ R-CT Checking order when there is no audio 4 SPK_ R+FT 3 SPK_ R+CT 6 SPK_ L-FT 5 SPK_ L-CT 8 SPK_ L+FT 7 SPK_ L+CT 1.Check the contact condition of or 13.2V /20V connector of Main Board. 2. Measure the 13.2V input voltage supplied from Power Board. (If there is no input voltage, remove and check the connector.) 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. A13 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom D. Function error date Revised Content Remote control operation checking method date A14 Pin Pin name 1 +3.5V_WIFI ① 2 WIFI_DM IR & EYE Sensor 3 WIFI_DP 4 GND 5 WOL/WIFI_PWR_ON 6 +3.5V_WIFI 7 RESET 8 GND 9 COMBO_RESET_JACK 10 BT_WAKE_UP_HOST 11 GND IR Eye 12 +3.5V_WIFI LED 13 No Connection ② 14 No Connection 15 No Connection ③ 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND Checking order to check remote control 22 +3.5V_ST 23 KEY2 24 MIC_DATA Checking order 25 MIC_CLK 1. Check IR cable condition between IR & Main board.(Check picture number① and ②.) 2. Check the standby 3.5V on the terminal (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. A14 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom D. Function error date Revised Content Magic Remote/WiFi operation checking method date A15 Pin Pin name 1 +3.5V_WIFI ① Wifi & BT Front 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL/WIFI_PWR_ON 6 +3.5V_WIFI 7 RESET 8 GND 9 COMBO_RESET_JACK 10 BT_WAKE_UP_HOST 11 GND Wifi & BT Rear 12 +3.5V_WIFI 13 No Connection ② 14 No Connection 15 No Connection ③ 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 +3.5V_ST 23 KEY2 24 MIC_DATA Checking order to check motion remote/wifi 25 MIC_CLK Checking order 1. Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2. Check the 3.5V on the terminal 1 pin. A15 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom E. Etc date Revised Content How to use the Service remote control date A16 1. How to access the remote control 0 4 1 3 0 4 1 3 A16 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom E. Etc date Revised Content How to use the Service remote control date A17 2. Remote control part definition POWER Power On/Off [ETC] Each time pressing the KEY button, Mode gets changed to ETC and P-ONLY each time ETC (Added Function) All KEY function [PIP PR-][PIP PR+][SWAP] [PIP INPUT][DVI] KEY Function Changed to factory mode P-ONLY (Added Function) All KEY function &[INFO][STILL][HDMI HOT][USB HOT][HDMI4] KEY Action INPUT Change to the external device mode ARC Change in the order of 16:9=>Zoom1=>Zoom2=>Cinema Zoom=>Aucto Screen=>4:3=>16:9 Changes in the order of Bright Picture=>Easy Picture=>Cinema=>Spots=>Game=> PSM Custom PIcture1=>Custom Picture2=>Bright Picture SSM (Added Function) Standard(user)=>music=>cinema=>sports=>game=>standard(user) PIP Picture In Picture is activated TEXT Access to the Power Only mode CAP Broadcasting caption(on/off) MPX Stereo mode (mono, stereo, foreign language) access Used when in factory mode Simplink (Added Access to the Simplink-connected device Function) Digital EYE function ON/OFF EYE For some Model, access to the Test Pattern TILT Used for screen tilting change (Access to the old PDP control mode) A17 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom E. Etc date Revised Content How to use the Service remote control date A18 B-TOOTH Connected to Blue-Tooth (Added function) Model Nam ex) 42PG60D-NA Current Model Name S/W Version ex) IN-START V03.11.0 Current S/W version MICOM Version ex) V3.05.0 current Mi-Com version UTT ex) User TV total usage time POWER OFF STATUS ex) Shows power-off status ADJ Test Pattern (Off=>White=>Red=>Green=>Blue=>Black=>Pattern=>Off) Change X-STUDIO (Added function) HDD,USB, external device’s HDD screen is activated MENU User function gets activated EXIT Exit from the current mode TIME SHIFT (Added Moves forward/backward of recorded contents function) MUTE Mute function (0 Volume) IN-STOP SET to factory mode VOL + - Volume Up/Down CH + - Channel Up/Down AV1,2,3 (Added function) 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 A18 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom E. Etc date Revised Content Check items after Main B/D replacement date A19 Check items afer Main B/D(Model Number D/L, White Balance) 1. Press the Service remote control instart Key. No.7 Select Model Number D/L - Key in the model name and serial number after checking the ID label on the back cover. 2. Press the Service remote control ADJ Key. No.13 Select White Balance - 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. A19 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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Standard Repair Process Detail Technical Manual Error Established symptom E. Etc date Adjustment Test pattern - ADJ Key Revised Content date A20 P-ONLY  HDMI HOT(Yellow button)  CH ‘+’ or ‘-’ You can view 11 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!) A20 Copyright © 2020 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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