LG 32LM620BPUA Service Manual Download Page 69

Page: 69 / 96

Checking order when there is no audio

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 P5600 to the speaker terminal and if you hear the ‘Chik~ Chik~’ sound when you

touch the GND and output terminal, the speaker is normal.

Standard Repair Process Detail Technical Manual

Voltage and speaker checking method
when there is no audio

C. Audio error_No audio/Normal video

A12

Established

date

Revised

date

Error

symptom

Content

A12

①

②

③

Speaker

SPK R-

SPK R+

SPK L-

SPK L+

Only for training and service purposes.

Summary of Contents for 32LM620BPUA

Page 1: ...ce purposes 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 limitat...

Page 2: ...served Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 10 BLOCK DIAGRAM 12 EXPLODED VIEW 13 ASSEMBLY GUIDE DISASSEMBLY GUIDE 15 TROUBLE SHOOTING GUIDE APPENDIX ...

Page 3: ...he 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 ...

Page 4: ...c charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrosta...

Page 5: ...oints 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 3 Solder the connections CAUTION Maintain original spacing between the replaced component...

Page 6: ...rmance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 Electrical Specification No Item Specification Remark 1 Market North America 2 Broadcasting system ATSC NTSC M 64 256 QAM 3 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 4 Receiving system Digital ATSC 64 256 QAM Analog NTSC M 5 Video Input NTSC M Rear 1EA 6 Compone...

Page 7: ...0 297 UDTV 2160P 14 3840 2160 112 5 50 594 UDTV 2160P 15 3840 2160 135 60 594 UDTV 2160P 16 3840 2160 225 100 1188 UDTV 2160P 17 3840 2160 270 120 1188 UDTV 2160P 18 4096 2160 53 95 23 97 296 7 UDTV 2160P 19 4096 2160 54 24 297 UDTV 2160P 20 4096 2160 56 25 25 297 UDTV 2160P 21 4096 2160 67 5 30 297 UDTV 2160P 22 4096 2160 112 5 50 594 UDTV 2160P 23 4096 2160 135 60 594 UDTV 2160P 24 4096 2160 225...

Page 8: ...80P 16 1920 1080 27 24 63 36 HDTV 1080P 17 1920 1080 33 71 29 97 79 12 HDTV 1080P 18 1920 1080 33 75 30 79 2 HDTV 1080P 19 1920 1080 56 25 50 148 5 HDTV 1080P 20 1920 1080 67 43 59 94 148 35 HDTV 1080P 21 1920 1080 67 5 60 148 5 HDTV 1080P 22 1920 1080 112 5 100 297 HDTV 1080P 23 1920 1080 134 86 119 88 296 7 HDTV 1080P 24 1920 1080 135 120 297 HDTV 1080P 25 3840 2160 53 95 23 98 296 7 UDTV 2160P ...

Page 9: ...1188 8K 8K Model Only 52 7680 4320 220 50 2376 8K 8K Model Only 53 7680 4320 263 74 59 94 2376 8K 8K Model Only 54 7680 4320 264 60 2376 8K 8K Model Only No Resolution H freq kHz V freq kHz 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 15 625 50 13 5 SDTV DVD 576I 625I 50Hz 4 720 480p 31 47 59 94 27 SDTV 480P 5 720 ...

Page 10: ...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 ...

Page 11: ... update progress go to Menu All Settings General About This TV 4 If you want to cancel update click 1 1 CANCEL UPDATE 5 NO Keep updating Yes Cancel updating Case 2 NOT 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 know that an update ...

Page 12: ... Main IC Audio AMP Digital Demod IF IR KEY Sensor HDMI MUX LVDS USB SPDIF OUT ETHERNET USB1 OCP 1 5A HDMI1 ARC REAR OPTIC LAN 30P X_TAL 24MHz WIFI SUB ASSY USB_WIFI Tuner HDMI2 SIDE CVBS YPbPr AV COMP REAR EEPROM 256Kb eMMC 5 1 4GB I2S I2C I2C Analog Demod USB2 OCP 1 5A HDMI3 CI Slot P_TS LM57 OPT LM57 OPT ...

Page 13: ...cs 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 IMPORTANT SAFETY NOTICE LV1 200P 400 200A 700 AR1 501 500 900 530 820 120 540 570 571 521 HP1 800 HS1 HW1 810 ARC1 A...

Page 14: ...cs Inc All rights reserved Only for training and service purposes EXPLODED VIEW MODULE MRC use only MRC Module Repair Center IMPORTANT NOTICE POL Front Panel Ass y POL Rear Optical Sheet Rear Side 200PPF 200PPR 200P 200PC 200SS ...

Page 15: ... 2 Remove Screw 1 2 3 Prohibition Pull the upward on bottom side Please remove Screw and Latch first 3 Open Back Cover Hold the right left stand assembled to B C and gently push the marked area respectively Caution Latches can be broken if too strong force is applied ASSEMBLY DISASSEMBLY GUIDE 1 2 3 3 2 2 Screw 6 Points Latch 13 Points ...

Page 16: ...rea ⓐ Step1 Right Side Hold Pull stand Hold Pull stand Step2 Left Side a Status Stands are assembled Necessarily utilize stand parts in disassembling If stands are not assembled it s very difficult to open B C Caution If latches of top side cannot be unlocked well shake SET a little Step 3 After holding R L stand and lift the bottom of B C upward ...

Page 17: ...on the flat and after assembling B C press around Latch points After pressing top side press bottom area Each latch work can be checked by click sound 2 Check assembled status around B C Check points Uniformity for gap step around SET Latch point Latch 13 Points Press lastly Check whether the IR Assy is fully assembled ...

Page 18: ... 18 Copyright LG Electronics Inc All rights reserved Only for training and service purposes 3 Assemble the screws Caution Don t apply wrong screw for each point 1 2 3 3 2 2 Screw 6 Points ...

Page 19: ...6ea and uncover the back cover 2 Disassemble the IR and Wi fi bracket 3 Detach the EMI tapes from the S PCB The EMI tape 6ea should be reused therefore attach them to the C bottom as a right figure 4 Disassemble the FFC cables from the S PCB and Open the black connector shield first Separate FFC cable from the connector ASSEMBLY DISASSEMBLY GUIDE MODULE ...

Page 20: ... L R 3ea for each bottom side screw 3 Flip the whole module and disassemble the case top to the upper side 7 Disassemble the panel Firstly detach the EMI tape at left and right side of the guide panel Starting from the bottom side raise up the panel carefully until it stands vertically When you handle the panel standing it vertically first and carrying the panel is recommended bottom side screw 3 ...

Page 21: ...guide panel with the thin and narrow tool ex a flat head screwdriver Be careful about fragile latches 9 Disassemble the sheets and diffuser plate Uncover latches on the guide panel with thin and narrow tool ex a flat head screwdriver Be careful about fragile latches 11 Disassemble the reflector sheet Be careful about damaging the reflector sheet ...

Page 22: ... All rights reserved Only for training and service purposes 12 Disassemble the LED array Press the connectors from the both side at the same time pull the connector up to the direction of the upper side Detach the whole LED array bars ...

Page 23: ...ray to cover bottom 2 Assemble the reflector sheet 3 Assemble the DP and sheet Assemble the reflector sheet according to the guide embossing Assemble the reflector sheet bellow the lens with your fingers Check the upper and lower side of sheet at corner and arrange it according to the remarks Make sure that all the holes of sheet is fastened on the racks of cover bottom ...

Page 24: ...ining and service purposes 4 Assemble the guide panel 5 Assemble the panel Arrange the upper left right side first and then assemble the bottom left right side of the panel 6 Attach the EMI pad on the panel and guide panel 7 Assemble the case top and flip the module ...

Page 25: ...ght LG Electronics Inc All rights reserved Only for training and service purposes 8 Arrange the S PCBs to the holders 9 Connect FFC cable to the S PCB 10 Attach the EMI tape 5ea 11 Tighten the case top screw 13ea ...

Page 26: ...26 Copyright LG Electronics Inc All rights reserved Only for training and service purposes 12 Assemble the Wi fi and RF bracket 13 Assemble the back cover Tighten the screws 6ea and cover the back cover ...

Page 28: ...off while viewing power auto on off 7 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 MR18 operating checking 12 11 12 Wifi operating checking 13 13 External device recognition error 14 14 E Noise Circuit noise mechanical noise 15 15 F Exterior error Exterior defect 16 First of all Check whether there is...

Page 29: ...parts End Always check record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 1 16 Error symptom A Video error No video Normal audio A18 A1 A18 A4 A2 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Spea...

Page 30: ...o Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A18 Established date Revised date 2 16 Error symptom 2 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 31: ...ain B D Check Tuner soldering Normal Picture Y N Y Close Y Close By using Digital signal level meter By using Diagnostics menu on OSD Advanced Channels Channel Tuning Manual Tuning Check the Signal Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N Normal Picture Y Close N A4 Standard Repair Process Establishe...

Page 32: ...ck external device and cable Y External device Cable normal HDMI error Check external device and cable Replace Main T con B D Replace Main T con B D N N A Video error Color error A6 N Y End Replace module Request repair for external device cable Color error Check Test pattern A8 A7 Standard Repair Process Established date Revised date 4 16 Error symptom 4 Copyright 2019 LG Electronics Inc All righ...

Page 33: ...y connecting Jig pattern Generator Set top Box etc N Y Replace Main T con B D Screen normal Check screen condition by input External Input Component HDMI DVI Request repair for external device Component error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Replace Main T con B D...

Page 34: ...oltage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A18 A18 Standard Repair Process Established date Revised date 6 16 Error symptom 6 Stand By Red or Turn On Operating Turn Off Close Copyright 2019 LG Electronics Inc All rights reserved Only for training and servic...

Page 35: ...ce Main B D CPU Abnormal If Power Off mode is not displayed Check Power B D voltage Y N Replace Main B D Normal voltage Replace Power B D Replace Power B D N Y Normal End Caution Check and fix exterior of Power B D Part A19 A18 Established date Revised date 7 16 Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service pu...

Page 36: ...gh Check fail after multi power on Check Change Power B D CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure Check Change Main B D NO POLING Power off when receiving no ack RESULT TV power off on Reboot CONDITION There is no I2C response from CPU for 15 seconds Check Change Main B D CPUCMD Power off by main SoC command Check Change Main B D INV_...

Page 37: ... Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A20 A21 A18 Disconnection Established date Revised date 9 16 Error symptom Standard Repair Process 9 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 38: ...nal Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 13 2V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B ...

Page 39: ...eck Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A22 Normal Voltage Close N N Check 13 2v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A18 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A22 Replace Main B D Y A22 Standard Repair Process Established date Revised date 11 16 Error s...

Page 40: ...Revised date 12 16 Error symptom Replace MR18 Turn off on the set and press the wheel Press the back key about 5sec Close If you conduct the loop at 3times change the M4 Y Check the INSTART menu RF Receiver ver is 00 00 Y Check Repair RF assy connection N Down load the Firmware INSTART MENU 14 RF Remocon Test 3 Firmware download Y RF Receiver ver is 00 00 N Close A23 A4 A4 12 Depending on country ...

Page 41: ...ifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date 13 16 Error symptom 13 Change the Wifi assy Normal Voltage Close Y Y N Replace Main B D Wi Fi Mac value is NG N Close A24 A4 A4 A24 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 42: ...eck and fix external device cable HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date 14 16 Error symptom Standard Repair Process 14 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 43: ...d as shown in the solution manual For models without any fix information provide the description Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 15 16 Error s...

Page 44: ...e cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 16 16 Error symptom Standard Repair Process 16 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 45: ...ing Part A5 6 A Video error _Vertical Horizontal bar residual image light spot Connection diagram A6 7 A Video error_ Color error Check Link Cable LVDS reconnection condition A7 8 Appendix Defected Type caused by T Con Inverter Module Check Cable 1 2 A 1 11 A 2 11 Exchange Main Board 1 3 A 3 11 A 5 11 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...

Page 46: ...menu when there is no audio A11 14 Voltage and speaker checking method when there is no audio A12 15 D Function error Remote control operation checking method A13 16 Motion Remote operation checking method A14 17 E Etc How to use the Service remote control A15 A17 18 Check items after Main B D replacement A18 19 Adjustment Test pattern ADJ Key A19 20 How to use JIG Power B D Diagnostic Smart Jig M...

Page 47: ... symptom Content Check LVDS A Video error_No video Normal audio After turning on the power and disassembling the case check C2333 Voltage 13V A1 C2333 13V Normal No Video Normal audio Reassemble Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 48: ...r_No video Normal audio A2 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 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 49: ...tor 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A3 Established date Revised date Error symptom Content A3 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 50: ...or video lag stop 1 Checking method for remote control for adjustment Press the IN START with the remote control for adjustment Version ALL MODELS A4 Established date Revised date Error symptom Content A4 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...easuring each voltage from power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content A5 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ..._Vertical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A6 Established date Revised date Error symptom Content A6 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...onnection condition A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A7 Established date Revised date Error symptom Content A7 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...n of FFC cable CABLE R Color Excessive Color is Excessive due to FFC Cable Contact CABLE Screen darkness screen is dark due to poor contact due to disconnection of the FFC cable pin CABLE G Color Excessive G color transient due to poor FFC cable connection Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 55: ...ead LVDS cable connection problem CABLE Color spread LVDS cable connection problem CABLE Screen stop Due to foreign substance withi nLVDS cable PIN Appendix Examples of Symptoms Image error Check for poor cable contact Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 56: ...Main Screen noise Broken screen due to Main IC problem Main Dark picture Dark left side screen Main Broken picture Top bottom screen part Picture problem due to tuner Inner side quality problem Appendix Examples of Symptoms Main Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 57: ...anner Main Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen Check parts by symptom Appendix Examples of Symptoms Main Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 58: ...n problem Right side screen problem Main LG logo Screen problem Screen picture spread problem Main Right side picture problem No problem at the initial stage During Heat run right side picture problem Check parts by symptom Appendix Examples of Symptoms Main Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 59: ...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 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 60: ...ng due to lateral external impact and internal bending of BLU MODULE Vertical smear Vertical spreading on cube screen in no signal MODULE Over color Screen contour part brightly Over color A 7 11 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 61: ...nter of the screen 1 block dark MODULE Vertical bar Center Vertical Bar MODULE Darkness at the bottom of the screen MODULE internal BLU breakage A 8 11 Check parts by symptom Appendix Examples of Symptoms Module Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 62: ...d the picture below the screen is broken T CON screen lower image broken T Con is defective and the picture below the screen is broken T CON screen lower image broken T Con is defective and the picture below the screen is broken A 9 11 Check parts by symptom Appendix Examples of Symptoms T Con Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 63: ...f the screen Initial normal operation upper darkness during heat run T CON Image Broken The entire screen is dark and bit noise occurs T CON Image Broken The entire screen is dark and bit noise occurs A 10 11 Check parts by symptom Appendix Examples of Symptoms T Con Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 65: ...ck front Power Indicator B Power error _No power A8 Established date Revised date Error symptom Content A8 ST BY condition On or Off Power ON condition Turn Off Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 66: ...chnical Manual Revised date A9 Error symptom Content Check power input voltage and ST BY 3 5V B Power error _No power A9 Check the DC 13 2V 20V Check the VLED Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 67: ...justment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A10 Established date Revised date Error symptom Content A10 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 68: ...und Out 4 Select TV Speaker Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A11 Established date Revised date Error symptom Content A11 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 69: ... the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A12 Established date Revised date Error symptom Content A12 Speaker 1 SPK R 2 SPK R 3 SPK L 4 SPK L Copyright 2019 LG Electronics Inc ...

Page 70: ...rol operation checking method D Function error A13 Established date Revised date Error symptom Content A13 Checking order to check remote control IR EYE Sensor IR Eye LED Pin Pin name 1 3 4V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 4V_WIFI 7 WIFI_SUSPEND RESUME 8 GND 9 COMBO_RESET 10 BT_WAKE_UP_HOST 11 GND 12 3 4V_WIFI 13 NC 14 NC 15 NC 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GN...

Page 71: ...3 5V on the terminal 1 pin Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear A14 Pin Pin name 1 3 4V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_PWR_ON 6 3 4V_WIFI 7 WIFI_SUSPEND RESUME 8 GND 9 COMBO_RESET 10 BT_WAKE_UP_HOST 11 GND 12 3 4V_WIFI 13 NC 14 NC 15 NC 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 3 4V_ST 23 KEY2 24 GND 25 GND Copyright 2019 LG Electronics Inc A...

Page 72: ... How to use the Service remote control A15 Established date Revised date Error symptom Content A15 0 4 1 3 0 4 1 3 1 How to access the remote control E Etc Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 73: ... Aucto Screen 4 3 16 9 PSM Changes in the order of Bright Picture Easy Picture Cinema Spots Game 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 Sim...

Page 74: ...hite 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 function Moves forward backward of recorded contents 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...

Page 75: ... in the model name and serial number after checking the ID label on the back cover 1 Press the Service remote control instart Key 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 E Etc Copyright 2019 LG Electronics Inc All rights reser...

Page 76: ...n 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 A19 Established date Revised date Error symptom Content A19 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 78: ...Y 19Y OLED 18Y SK80 UK89 SK85 SK96 SK95 SK99 18Y 19Y UK63 UK64 UK65 UK68 UK7050 UM73 UM74 UM76 UM79 New JIG OLD JIG Cable Connection 18 Marking check No Marking 24 Marking Check 15Y OLED 17 18Y 19Y W7 B8 C8 E8 G8 W8 C9 E9 18Y 19Y LK57 32 43 49LK54 32LK61 32LK62 43 49LK61 LM63 18Y 19Y UK74 UK75 UK77 UK78 SK79 SM86 16Y UH 16 18Y 19Y UH UK UM 17Y 18Y SJ UJ UK SK 16Y 17Y UH SJ 16Y 17Y 18Y 19Y LH LJ LK...

Page 79: ... UH76 UH65 UH68 LH68 LH66 LH60 LH54 17 OLED B7 C7 E7 G7 W7 17 LED SJ95 UJ98 SJ85 UJ94 SJ80 UJ77 UJ75 UJ78 UJ65 UJ68 UJ63 UJ67 LJ61 LJ68 LJ55 LJ58 18 LED SK80 SK85 SK95 UK78 UK75 UK77 SK79 UK63 UK64 UK65 UK68 UK7050 LK57 32 43 49LK54 32LK61 62 43 49LK61 18 OLED B8 C8 E8 G8 W8 19 LED SM86 UM73 UM74 UM76 UM79 LM63 19 OLED C9 E9 Copyright 2019 LG Electronics Inc All rights reserved Only for training a...

Page 80: ...4 LCD POWER A 2013 Power Board Muitl Gender How to Connect Connect the Muiti Gender to the connector black as shown in picture 2 of the Smart JIG Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 81: ...agnosis 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 ...

Page 82: ... Power Cable connector to the Muitl Gender JIG 24Pin connector 3 1 2 Check power board voltage Switch the product S W in JIG to LCD LCD MODEL Check the power voltage and switch 24V to the correct voltage Fix the LCD MODEL switch to 24V Smart JIG 4 Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 83: ...oard 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 ...

Page 84: ...1 3 2 Switch the LCD MODEL S W to 24V by checking the power voltage Fix the LCD MODEL switch to 24V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 85: ... switch to 24V Smart JIG Disconnect the Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 86: ... Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 87: ... Main Board 24Pin Power Cable connector Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 88: ... the Muitl Gender JIG 28Pin connector Switch the LCD MODEL S W to 20V by checking the power voltage Fix the LCD MODEL switch to 20V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 89: ... Muitl Gender JIG 28Pin connector Switch the LCD MODEL S W to 20V by checking the power voltage Fix the LCD MODEL switch to 20V Smart JIG When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 90: ...the Main Board 18Pin Power Cable connector Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 91: ...the Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK 24V 12V LED turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 92: ...t the Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 93: ...the Main Board 12Pin Power Cable connector Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 94: ...e Main Board 12Pin Power Cable connector Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 95: ...e Main Board 28Pin Power Cable connector Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector When the OK LED 24V 12V turns on Power Board is normal When the NG LED turns on the Power Board can be judged as defective Copyright 2019 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 96: ......

Search results

Summary of Contents for 32LM620BPUA

Reviews:

Related manuals for 32LM620BPUA

Brands by name

Popular brands

LG 32LM620BPUA, Service Manual

Search results

Summary of Contents for 32LM620BPUA

Reviews:

Related manuals for 32LM620BPUA

Brands by name

Popular brands