LG 43LM5500PLA

CONFIDENTIAL LED TV SERVICE MANUAL CHASSIS : LD95H MODEL : 43LM5500PLA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL71481202 (1903-REV00) Copyright © 2019 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................................................................................... 12 EXPLODED VIEW ................................................................................... 13 DISASSEMBLY / ASSEMBLY GUIDE..................................................... 15 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 LD95H (1) Performance: LGE TV test method followed chassis. (2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC specification - Wireless : Wireless HD Specification (Option) 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 ± 5 °C (2) Relative Humidity: 65 % ± 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 EU / CIS / MEA / OCEANIA / ASIA (1) Digital TV Satellite DTV(DVB-S/S2) Terrestrial(DVB-T/T2) 2 Broadcasting system Cable(DVB-C) Market : EU / CIS (2) Analogue TV Terrestrial/Cable (PAL B/B,B/G, D/K, I , SECAM B/G, D/K, L ) (1) Digital TV VHF III: 174 ~ 230 Mhz UHF IV: 470 ~ 606 Mhz UHF V: 606 ~ 862 Mhz S Band II: 230 ~ 300 Mhz (Maximum number of storable programmes : 2000) 3 Program coverage S Band III: 300 ~ 470 Mhz (Maximum number of storable programmes : 2000) DVB-S/S2: 950 ~ 2150 Mhz (Maximum number of storable programmes : 6000) DVB-C: 46 ~ 890 Mhz (Maximum number of storable programmes : 2000) (2) Analogue TV Analogue TV: 46 ~ 862 Mhz (Maximum number of storable programmes : 2000) ▶ DTMB (Carrier, Code Rate, Constellation, Frame Header, Interleaving) ▶ China - MODE1 : 3780, 0.4, 16QAM, PN945, 720 Analog : Upper Heterodyne - MODE2 : 1, 0.8, 4QAM, PN595, 720 Digital : COFDM(DVB-T) Only DVB-T - MODE3 : 3780, 0.6, 16QAM, PN945, 720 Model - MODE4 : 1, 0.8, 16QAM, PN595, 720 4 Receiving system Digital : COFDM(DVB-T/T2) Only DVB-T2 - MODE5 : 3780, 0.8, 16QAM, PN420, 720 Model - MODE6 : 3780, 0.6, 64QAM, PN420, 720 Digital : QAM - MODE7 : 1, 0.8, 32QAM, PN595, 720 ▶ Hong Kong - 3780, 0.4/0.6, 4/16/64QAM, PN945, 720 ▶ DVB-C - Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s - Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM -6- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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No. Item Specification Remarks 5 Video Input PAL, SECAM, NTSC, PAL60 Rear(1EA), AV & Component Common 6 Component Input Y/Cb/Cr, Y/ Pb/Pr HDMI 1 PC / DTV Format Side (1EA) 7 HDMI Input HDMI 2 PC / DTV Format Rear(1EA) 8 Audio Input AV Audio / Component Audio / DVI Audio Rear(1EA, AV and DVI use same jack) 9 SPDIF Out Optical Audio out Rear(1EA) 10 USB Input EMF, DivX HD, For SVC (download) Side (1EA) JPEG, MP3 11 Ethernet Connect Optical Audio ou Rear (1EA) STP cable Only UK 12 PCMCIA Card slot PCMCIA Slot Side (1EA) Only EU / CIS -7- 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(kHz) Pixel clock(MHz) Proposed 1 720*480i 15.73 59.94 13.5 SDTV, DVD 480I 2 720*480i 15.73 60 13.514 SDTV, DVD 480I 3 720*576i 15.625 50 13.5 SDTV, DVD 576I 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 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 10 1920*1080 28.125 50 74.25 HDTV 1080I 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 67.432 59.94 148.352 HDTV 1080P 15 1920*1080 67.5 60 148.5 HDTV 1080P 16 1920*1080 27 24 74.25 HDTV 1080P 17 1920*1080 26.97 23.94 74.176 HDTV 1080P 18 1920*1080 33.75 30 74.25 HDTV 1080P 19 1920*1080 33.71 29.97 74.176 HDTV 1080P -8- 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 25.125 SDTV 480P 2 640*480 31.5 60 25.125 SDTV 480P 3 720*480 15.73 59.94 13.5 SDTV 480I Don’t insert in manual spec. out 4 720*480 15.75 60 13.514 SDTV 480I Don’t insert in manual spec. out 5 720*576 15.62 50 13.5 SDTV 576I(DVB) Don’t insert in manual spec. out 6 720*480 31.47 59.94 27 SDTV 480P 7 720*480 31.5 60 27.027 SDTV 480P 8 720*576 31.25 50 27 SDTV 576P(DVB) 9 1280*720 44.96 59.94 74.176 HDTV 720P 10 1280*720 45 60 74.25 HDTV 720P 11 1280*720 37.5 50 74.25 HDTV 720P(DVB) 12 1920*1080 28.12 50 74.25 HDTV 1080I(DVB) 13 1920*1080 33.72 59.94 74.176 HDTV 1080I 14 1920*1080 33.75 60 74.25 HDTV 1080I 15 1920*1080 26.97 23.97 74.175 HDTV 1080P 16 1920*1080 27 24 74.25 HDTV 1080P 17 1920*1080 33.71 29.97 74.175 HDTV 1080P 18 1920*1080 33.75 30 74.25 HDTV 1080P 19 1920*1080 56.25 50 148.5 HDTV 1080P(DVB) 20 1920*1080 67.43 59.94 148.35 HDTV 1080P 21 1920*1080 67.5 60 148.5 HDTV 1080P 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 85.5 VESA(WXGA) 7 1152*864 54.34 60.05 80 VESA 8 1280*1024 63.98 60.02 108 VESA(SXGA) Except HD Model 9 1920*1080 67.5 60 148.5 HDTV 1080P Except HD Model -9- Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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SOFTWARE UPDATE 1. USB (1) Insert the USB memory Stick to the USB port. (2) Automatically detect the SW Version and show the below message (3) Click [YES]: initiate the download and install of the update. (4) Click [Check Now]: move to “About This TV” page for update. (5) TV is updating. (6) After finished the update, below Pop-up appear. (7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option. - 10 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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2. NSU Case 2. NOT Allow Automatic Updates Toggle Item (This Function is needed to connect to the internet) (1) Menu -> All Settings -> General -> About This TV Case 1. Allow Automatic Updates Toggle Item (1) Menu -> All Settings -> General -> About This TV (2) TV will automatically check for updates when every TV boots. When an updated is detected, the TV will issue an Alert letting the user (2) Silent Update_Pop-up When the download and install of the update is complete, the TV issues a Toast notification letting the user know that the update is complete and a reboot is required. (3) [Yes] : Initiate the download and install of the update [No] : Close the pop-up. The Alert will come back again when TV checks again. (4) The following pop up window appears. (3) If you want to see the update progress, go to [ Menu -> All Settings -> General -> About This ] (5) [CHECK NOW] : Go to the About this TV setting page [CLOSE] : Close the pop-up (4) If you want to cancel update, click (1.1) CANCEL UPDATE (5) [NO] : Keep updating [Yes] : Cancel updating - 11 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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NAND FLASH SPI_SCK/SDI/SDO/CS Serial Flash (IC102) (IC1300) Buffer PCM_A[0:7] IC1902 I2C_SCL/SDA System EEPROM CI SLOT PCM_A[8:14] (P1900) (IC104) PCM_DATA[0:7] Only EU/CIS TS_DATA[0:7] SIDE 1. Main IC Block Diagram X-tal CK+/-, D0+/-, D1+/-, D2+/-_HDMI2 HDMI1 (JK801) DDC_SCL/SDA_2, HDMI_CEC DM/DP USB (JK710) +5V_USB DC-DC, OCP USB1_OCP/CTL (IC400) IC101 SPDIF SPDIF SPDIF_OUT - 12 - (JK1001) Jack AUD_LRCH, Main SOC SPK_L AUD_LRCK, AUD_SCK LNB_OUT Audio AMP AMP_SCL/SDA IF_AGC_S, IF_AGC (IC5600) IF_N, IF_P, IP_S, IM_S, QM_S, QP_S SPK_R Tuner TU_SCL / SDA (TU3703) TU_CVBS, SIF BLOCK DIAGRAM Copyright © One KEY, LED_R, IR, I2C_Sensor Connector LNB_OUT LNB DEMOD_SCL/SDA (P5601) (IC2701) REAR CK+/-, D0+/-, D1+/-, D2+/-_HDMI4 (P1800) HDMI2 (P1801) DDC_SCL/SDA_4, HDMI_CEC (JK802) RXA0+/-~RXA4+/-, RXACK+/- LAN EPHY_TP/TN/RP/RN RXB0+/-~RXB4+/-, RXBCK+/- (JK2100) AGP Only UK AV & Component COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN Only for training and service purposes. Common 30P HD LVDS wafer 51P FHD LVDS wafer (JK2601) LG Electronics Inc. All rights reserved.

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EXPLODED VIEW (SET) 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. 900 400 521 120 500 800 540 HP1 HW1 HS1 530 820 121 LV1 200P 200T 200A 700 A10 ARC1 AR1 - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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EXPLODED VIEW (MODULE) IMPORTANT NOTICE MRC use only * MRC : Module Repair Center Optical Sheet 200PPR POL(Rear) 200SR1 Rear Side 200P Ass’y Panel 200SL1 200PC 200PPF POL(Front) - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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DISASSEMBLY GUIDE 1.Unlock screws (“1”: 1EA, ”2”: 2EA, “3”: 5EA) to separate back cover assembly from module.Detach the Side AV Label(“4”). 3 1 4 2 2 3 3 3 3 2. Detach the Tape(“5” ). 5 - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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3. Separate connectors (“6”) from Main/Power PCB and module. Separate Speaker(“7”: 2EA) from module. 6 6 6 6 6 6 6 7 7 A 6 6 A B B B B 4. Unlock screw (“8”: 18EA) to separate from module. *1 pole Stand Supporter (“9”: 2EA) is applied on 1pole Stand type. 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 9 8 8 9 8 - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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5. Detach the Insulation Sheet.(“10” ). 10 6. Separate connectors (“13”) from IR PCB(“12”).Lift the latch (“14”) to the upside and push the button(15) for separation . 11 14 14 15 12 13 7. Detach the foot rubber(“17” : 2EA) from 2pole Stand(“16”) 16 17 17 - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

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TROUBLE SHOOTING GUIDE Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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↔ ☞ ☞ ☞ ※ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ → → → → → ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ ※ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ ☞ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ ※ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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→ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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☞ ☞ ☞ ☞ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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※ ※ ※ ※ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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  Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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단선 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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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 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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① ② ③ Speaker 1 SPK R- 2 SPK R+ 3 SPK L- 4 SPK L+ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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① ② ③ Pin Pin name 1 GND 2 NC 3 KEY2 4 +3.4V_ST 5 GND 6 LED_R/BUZZ 7 IR 8 GND 9 I2C_SCL_SENSOR 10 I2C_SDA_SENSOR ① ② ③ Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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  Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Power Board Muitl Gender JIG Diagram (P/N: RAD33187801) 15Y 16Y 15Y (LF/UF Series) (OLED B6) (OLED) 28Pin 24Pin 24Pin 24Pin NC 18 Marking check 24Pin 18Pin 16Y New JIG (OLED) 24Pin 13Y/14Y 28Pin No Marking OLD JIG 17/18Y /19Y 17Y/18Y/19Y W7 (OLED) 24Pin 12Y 18Y/19Y 18Y/19Y LK57,32/43/49LK54 B8, C8 E8, G8 24Pin UK63/UK64 32LK61/32LK62 W8 UK65/UK68 43/49LK61 B9/C9/ UK7050 LM57/LM63 E9/W9 18Y/19Y UM73/UM74 SK80/UK89 UM75/UM76/ SK85/SK96 UM79/UM80 16Y/17Y/18Y/19Y SK95/SK99 SM90/SM98 (UH/UJ/UK/SK/ 18Pin /SM 18Y/19Y 24 Marking Check 28Pin UK74,UK75 28Pin 12Pin 12Pin 28Pin UK77,UK78 Cable Connection SK79 Includes 49UJ63 SM80/SM86 17Y/18Y 16/18Y/19Y 16Y/17Y 16Y 16Y/17Y/18Y/19Y (UH) (SJ/UJ/UK/SK) (UH/UK/UM) (UH/SJ) (LH/LJ/LK/LM) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Power Board Muitl Gender JIG Diagnostic model List <15Y/16Y/17Y/18Y/19Y OLED Model, 16Y/17Y/18Y/19Y LED Model> Year Product Model EG92/EG93/EG94 ‘15 OLED EG96 EF95 B6, C6 OLED E6, G6 ‘16 UH95/UH96, UH85/UH93 LED UH77/UH87, UH75/UH76 UH65/UH68, LH68, LH66, LH60,LH54 ‘17 OLED B7, C7, E7, G7, W7 SJ95/UJ98, SJ85/UJ94 SJ80, UJ77, UJ75/UJ78 ’17 LED UJ65/UJ68, UJ63/UJ67 LJ61/LJ68, LJ55/LJ58 SK80/SK85/SK95 UK78/UK75/UK77/SK79 ‘18 LED UK63/UK64/UK65/UK68/UK7050 LK57, 32/43/49LK54, 32LK61/62, 43/49LK61 ‘18 OLED B8, C8, E8, G8, W8 SM80/SM85/SM86 ‘19 LED UM73/UM74/UM75/UM76/UM79/UM80 LM57/LM63 ‘19 OLED B9/C9/E9/W9 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Power Board Muitl Gender How to Connect 1 ▶ Power Board Muitl Gender JIG 2 “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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Smart Jig Voltage Setting 1 2 ▶ Switch the product S/W in JIG to LCD. ▶ LCD MODEL Check the power voltage ▶ Check power board voltage. and switch to the correct voltage. ※ Note on set up (The correct power diagnosis can be made only if it is set correctly.) - 24V Power Board : Change the switch to 24V of Smart Jig Voltage - 20V Power Board : Change the switch to 24V of Smart Jig Voltage - 13.2V/18V Power Board : Change the switch to 24V of Smart Jig Voltage Power B/D Smart Jig Voltage Switch 24V 24V 20V 20V 13.2V/18V 24V Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (1) 1 2 ▶ Switch the product S/W in JIG to LCD. ▶ LCD MODEL Check the power voltage and switch(24V) to the correct voltage. ▶ Check power board voltage. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (2) 5 6 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y OLED(B6) Power Board Diagnostic method 1 2 ▶ Switch the LCD MODEL S/W to 24V by checking the power voltage. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) ▶ Connect the 24Pin Power Cable connector to the Multi gender JIG 24Pin connector. 3 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y OLED(C6) Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Smart JIG: Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y OLED(E6) Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y OLED(G6) Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 24Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`17Y OLED(B7/C7/E7/G7) Power Board Diagnostic method 1 2 ▶ Disconnect the Main Board 28Pin Power Cable connector. ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector 3 4 ▶ Switch the LCD MODEL S/W to 20V by checking ▶ When the OK LED(24V,12V) turns on, Power Board is normal. the power voltage. ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`17Y OLED(W7) Power Board Diagnostic method 1 2 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 28Pin connector 3 4 ▶ Switch the LCD MODEL S/W to 20V by checking ▶ When the OK LED(24V,12V) turns on, Power Board is normal. the power voltage. ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y/`17Y LED 18Pin Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 18Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 18Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y LED(UH95/UH96) Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 28Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 28Pin Power Cable connector ▶ When the OK(24V,12V) LED turns on, Power Board is normal. to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y/`17Y LED(UH85/UH93) Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 28Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 28Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y/`17Y LED 12Pin Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 12Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 12Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`16Y LED 12Pin Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 12Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) 3 4 ▶ Connect the 12Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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`17Y LED 28Pin Power Board Diagnostic method 1 2 ▶ Check power board voltage. ▶ Disconnect the Main Board 28Pin Power Cable connector. ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) 3 4 ▶ Connect the 28Pin Power Cable connector ▶ When the OK LED(24V,12V) turns on, Power Board is normal. to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes

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