LG 39LN51 Series Service Manual Download Page 58

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Checking order

1, 2. Check IR cable condition between IR & Main board.

Check the st-by 3.5V on the terminal 4.

Standard Repair Process Detail Technical Manual

Remote controller operation checking method

D. Function error_ No response in remote controller,
key error

A17

Established

date

Revised

date

Error

symptom

Content

LCD TV

P600

GND

KEY1

KEY2

3.5V_ST

GND

LED_R/BUZZ

GND

①

③

2013. 01 .09

②

Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 39LN51 Series

Page 1: ...CE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only CHASSIS LB35B MODEL 39LN51 39LN51 T CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL ...

Page 2: ...Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 BLOCK DIAGRAM 13 EXPLODED VIEW 14 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals 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 m...

Page 4: ...ctrostatic charge on your body by touching a known earth ground Alter 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 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent e...

Page 5: ...he 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 3 Solder the connections CAUTION Maintain original spacing between the replace...

Page 6: ...umber in accordance with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 Model General Specification HDMI 1 4 with Deep Color is only apply for FHD Model No Item Specification Remarks 1 Market NON EU 2 Broadcasting system PAL SECAM B G D K ...

Page 7: ... 1080I 50Hz 11 1920 1080 33 72 59 94 74 176 HDTV 1080I 12 1920 1080 33 75 60 00 74 25 HDTV 1080I 13 1920 1080 56 25 50 148 5 HDTV 1080P 14 1920 1080 67 432 59 94 148 350 HDTV 1080P 15 1920 1080 67 5 60 00 148 5 HDTV 1080P 6 HDMI Input 6 1 PC Mode Spec out but it can be shown the picture at only HDMI DVI IN 1 via DVI to HDMI Cable Monitor Range Limits Min Vertical Freq 58 Hz Max Vertical Freq 63 Hz...

Page 8: ...0 00 27 027 SDTV 480P 6 720 576 31 25 50 00 27 SDTV 576P 7 1280 720 44 96 59 94 74 176 HDTV 720P 8 1280 720 45 60 00 74 25 HDTV 720P 9 1280 720 37 5 50 00 74 25 HDTV 720P 10 1920 1080 28 125 50 00 74 25 HDTV 1080I 11 1920 1080 33 72 59 94 74 176 HDTV 1080I 12 1920 1080 33 75 60 00 74 25 HDTV 1080I 13 1920 1080 56 25 50 00 148 5 HDTV 1080P 14 1920 1080 67 432 59 94 148 350 HDTV 1080P 15 1920 1080 6...

Page 9: ...e In Carry the command ADC adjust ADC Adjust A D 1 0 Automatically adjustment The use of a internal pattern HDMI 1 256Bytes 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 01 17 01 03 80 A0 5A 78 0A F3 30 A4 54 46 96 26 20 0F 49 4B 21 08 00 45 40 01 01 61 40 01 01 01 01 30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28 40 55 00 C4 8E 21 00 00 1E 1B 21 50 A0 51...

Page 10: ... Adjustment method 4 5 1 Auto WB calibration 1 Set TV in ADJ mode using P Only key or POWER ON key 2 Place optical probe on the center of the display It need to check probe condition of zero calibration before adjustment 3 Connect RS 232C Cable 4 Select mode in ADJ Program and begin a adjustment 5 When WB adjustment is completed with OK message check adjustment status of pre set mode Cool Medium W...

Page 11: ...eck 1 Pallet moves in the station POWER CORD AV CORD is tightly inserted 2 Connect the AV JACK Tester 3 Controller GWS103 4 on 4 GND Test Auto If Test is failed Buzzer operates If Test is passed execute next process Hi pot test Remove A V CORD from A V JACK BOX 5 HI POT test Auto If Test is failed Buzzer operates If Test is passed GOOD Lamp on and move to next process automatically 7 3 Checkpoint ...

Page 12: ...hould be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time 1 After Aging Start Keep the Power ON status during 5 Minutes 2 In case of LCD Back light on should be checked using no signal or Full white pattern 9 2 2 Equipment 1 Color Analyzer CA 210 NCG CH 9 WCG CH1...

Page 13: ...48 115 50 51 113 112 Audio_SCL Audio_SDA LVDS Output P Dim Inv ON RL On P_ST 3 5V M_3 3V TU_3 3V P_24V IC701 MP20051 Main_1 2V A_OUT_12V 10 11 7 8 9 38 I2S_MCLK I2S_WS I2S_SCK I2S_SDO P400 108 111 117 IR KEY1 Led_PWR 102 105 101 53 52 45 85 84 EEP SDA EEP SCL 94 95 97 96 SPI_CLK SPI_DI SPI_CZ SPI_DO S_AMP_24V 32 40 9 LPF JK202 USB_5V 110 KEY2 ST_3 5V 5 P_12V Q710 IC711 1 8V REG Main_1 8V Main_3 3V...

Page 14: ...ny electrical and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of man...

Page 15: ...R116 220K R114 10K R117 10K R118 12K R113 220K R115 12K AV2_LIN AV2_VIN R112 75 C106 10uF 16V C104 10uF 16V Q101 MMBT3904 NXP E B C Q102 MMBT3904 NXP READY E B C Q103 MMBT3904 NXP E B C Q104 MMBT3904 NXP READY E B C Q105 MMBT3904 NXP DEBUG E B C AV2_VIN R122 0 OPT R121 33 DEBUG C101 470pF 50V C102 470pF 50V C107 470pF 50V C108 470pF 50V JK101 PPJ239 06 6J 7J 4J 8K 5K 8L 5L 5M 4N 6N 7N 7D 5D 8E 5E ...

Page 16: ...0 JK203 14 NC 13 CEC 5 DATA1_SHIELD 20 SHIELD 12 CLK 11 CLK_SHIELD 2 DATA2_SHIELD 19 HPD 18 5V_POWER 10 CLK 4 DATA1 1 DATA2 17 DDC CEC_GND 9 DATA0 8 DATA0_SHIELD 3 DATA2 16 SDA 7 DATA0 6 DATA1 15 SCL HDMI1_SCL HDMI1_DET Q230 MMBT3904 NXP E B C R230 10K D230 BAT54C A2 C A1 HDMI1_CK R233 2 7K 5V_USB R232 2 7K HDMI1_D1 R235 10K R234 4 7K HDMI1_D2 HDMI1_D0 HDMI1_CK HDMI1_SDA HDMI1_D2 HDMI1_HPD R231 1K...

Page 17: ...315 22000pF 50V C326 390pF 50V R317 12 R314 12 R315 12 C312 1uF 10V C302 0 1uF 16V OPT 1uF C303 10V SW_RESET AUAMP_SDA 0 1uF C309 50V C313 1uF 10V 0 1uF C318 50V 24V_AMP C327 390pF 50V I2S_WS R306 100 C325 390pF 50V C305 33pF 50V R320 12 C301 0 1uF 16V R318 12 C311 22000pF 50V R311 100 C314 1uF 10V C308 22000pF 50V R319 12 24V_AMP I2S_SDO C328 390pF 50V R313 12 I2S_MCLK AUAMP_SCL C320 1000pF 50V R...

Page 18: ... 3 5V_ST C424 1000pF 50V LED C407 10uF 6 3V C404 22uF 6 3V 100pF C406 50V R423 4 7K OPT TUNER_SCL TUNER_SDA L401 BLM18PG121SN1D R421 10K R422 10K R407 2 2K R408 2 2K R405 33 R406 33 C412 10uF 6 3V P421 12507WR 08L 1 2 3 4 5 6 7 8 9 R411 1 R413 10PAL R414 10PAL R413 1 0 NTSC R414 1 0 NTSC TU401 TDSH G501D B PAL 5 B1 3 3V 11 DIF N 2 RESET 10 DIF P 4 SDA 1 NC 9 IF_AGC 8 CVBS 3 SCL 7 B2 1 8V 6 SIF A1 ...

Page 19: ...04 120 ohm L501 120 ohm L502 120 ohm L506 120 ohm R519 4 7K 3 5V_ST R518 100 MUTE_AOUT TUNER_SDA 100 R520 TUNER_SCL 100 R521 I2S_SCK I2S_SDO I2S_WS C542 0 1uF AVDD_DDR TUNER_RESET HDMI1_DET HDMI2_DET R547 10K R548 10K C572 0 1uF 16V R574 100 R523 33 0 R524 3 5V_ST C551 220pF OPT 50V L521 100NH OPT R513 100 R514 100 C541 22000pF 50V R531 10K IC504 APX803D29 1 GND 3 VCC 2 RESET 3 5V_ST 0 1uF C560 R5...

Page 20: ... 02 30 01 31 RXA2 RXA3 RXACK P602 FI RE51S HF J R1500 FHD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 RXBCK RXB0 RXBCK RXA0 RXB3 RXB1 RXA1 RXB0 RXACK RXB2 PANEL_VCC RXB3 RXA2 RXB1 RXA1 RXA0 RXA3 RXB2 C602 1000pF 50V OPT C603 0 1uF 16V HD L601 120 HD C601 10uF 16V OPT RXA3 RXA3 RXACK RXACK RXA2 RX...

Page 21: ... MMBT3904 NXP E B C C777 10uF 10V OPT P_12V 3 3V_M C773 0 1uF 16V R771 33 IC709 MP1497DJ 3 SW 2 IN 4 GND 1 SS 5 BST 6 EN 7 VCC 8 FB C775 0 1uF 16V C774 0 1uF R778 47K C771 1uF 25V R777 100K C770 10uF 16V 0 1uF C705 16V C772 0 1uF 16V L771 6 8uH NR8040T4R7N R770 43K 1 R772 8 2K 1 R765 3 3K 5V_USB C776 22uF 10V L701 120 L702 120 L703 120 L770 120 L761 120 R748 33K R740 2 7K 1 R741 4 7K 1 IC711 AP111...

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Page 23: ...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 14 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A6 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker C...

Page 24: ...nd replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A4 Established date Revised date 2 14 LCD TV Error symptom 2013 01 24 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 25: ...ment DVD Player Set Top Box Different maker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N N Normal Picture Y Close N A6 Standard Repair Process Established date Revised date 3 14 LCD TV Error symptom 2013 01 24 Copyright 2013 LG Electronics Inc All rights re...

Page 26: ... equipments have problem or not By connecting RF Cable at other equipment Set Top Box Different maker TV etc A6 Standard Repair Process Established date Revised date 4 14 LCD TV Error symptom Contact with signal distributor or broadcaster Close N Check Tuner soldering Replace Main B D 2013 01 24 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Intern...

Page 27: ...able Y External device Cable normal HDMI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A7 N Y End Replace module Request repair for external device cable Color error Check Test pattern A10 A8 A9 Standard Repair Process Established date Revised date 5 14 LCD TV Error symptom 2013 01 24 Copyright 2013 LG Electronics Inc All rights reserved Only...

Page 28: ...nnecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input AV Component HDMI Request repair for external device Component error HDMI Connect other external device and cable Check normal operation of External Input Component and HDMI by connecting Jig pattern Generator Set top Box etc Replace Main B D Screen normal N Y Check S W Version Y N Che...

Page 29: ... voltage 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 A11 A12 A13 A4 Standard Repair Process Established date Revised date 7 14 LCD TV Error symptom Stand By Red Close 2013 01 24 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LG...

Page 30: ...Explanation Normal POWEROFF_REMOTEKEY Power off by REMOTE CONTROL POWEROFF_OFFTIMER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except ...

Page 31: ...nd repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A15 A16 Disconnection Established date Revised date 9 14 LCD TV Error symptom Standard Repair Process 2013 01 24 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 32: ...al 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 24V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Established date Revised date 10 1...

Page 33: ...aterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A17 Normal Voltage Close N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A4 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A17 Replace Main B D Y A17 Standard Repair Process Established date Revised date 11 14 LCD TV Error symptom 2...

Page 34: ...nal device cable RGB 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 12 14 LCD TV Error symptom Standard Repair Process 2013 02 02 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 35: ...eed as shown in the solution manual For models without any fix information provide the description OR 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 13 14 LC...

Page 36: ...emote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 14 14 LCD TV Error symptom Standard Repair Process 2013 02 02 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 37: ...on diagram A7 10 11 Check Link Cable LVDS reconnection condition A8 A9 12 Adjustment Test pattern ADJ Key A10 13 A Video error_Vertical Horizontal bar residual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 17 Exchange T ...

Page 38: ...OFF MODE checking method A14 28 C Audio error_No audio Normal video Checking method in menu when there is no audio A15 29 Voltage and speaker checking method when there is no audio A16 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method in case of audio error A16 31 D Function error_ No response in remote controller key error Remote controller operation checking meth...

Page 39: ... Video error_No video Normal audio ALL MODELS A1 Established date Revised date Error symptom Content LCD TV Power On disjoint back case check lighting from the module 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ...asure DC Voltage applying to Module from Power Board Output Voltage from Power Board supply to Module Check Pin contacting statement and connection statement ALL MODELS 2013 02 15 Output Voltage is depend on inch 32 inch 65 6 86 9V 39 inch 117 3 142 2V 42 inch 141 8 164 3V Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...ntry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into W B ADJUST 3 After recording the R G B GAIN Offset value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD 4 Confirm W B ADJUST OK at In start menu 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...Error symptom Content LCD TV Check the DC 24V 12V 3 5V 18 Pin Power Board Main Board Common 1 Power on 2 DRV ON 3 3 5V 4 PDIM 5 3 5V 6 N C 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 N C 17 GND 18 GND Edge LED 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ...op 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A6 Established date Revised date Error symptom Content LCD TV 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...tal bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content LCD TV ALL MODELS 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...l Technical Manual Check and replace Link Cable LVDS and contact condition A Video error_Color error ALL MODELS A8 A9 Established date Revised date Error symptom Content LCD TV 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ...e and Full White 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 A10 Established date Revised date Error symptom Content LCD TV 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...oken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange T Con Board 1 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ...l Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange T Con Board 2 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ... Appendix Exchange PSU LED driver No Light Dim Light Dim Light Dim Light No picture Sound Ok Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 50: ...ge Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...l Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 Un repairable Cases In this case please exchange the module Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 52: ...Check front display LED B Power error _No power A11 Established date Revised date Error symptom Content LCD TV ST BY condition Red 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 53: ...e Error symptom Content LCD TV Check the DC 24V 12V 3 5V 18 Pin Power Board Main Board 공통 1 Power on 2 DRV ON 3 3 5V 4 PDIM 5 3 5V 6 N C 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 N C 17 GND 18 GND Edge LED 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 54: ...r symptom Content LCD TV Check the DC 24V 12V 3 5V 18 Pin Power Board Main Board Common 1 Power on 2 DRV ON 3 3 5V 4 PDIM 5 3 5V 6 N C 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 N C 17 GND 18 GND Edge LED 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 55: ... OFF HISTORY Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A14 Established date Revised date Error symptom Content LCD TV 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 56: ...r is on Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A15 Established date Revised date Error symptom Content LCD TV 2013 02 15 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

Page 57: ...peaker 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 ALL MODELS A16 Established date Revised date Error symptom Content LCD TV Check the DC 24V 12V 3 5V 18 Pin Power Board Main Board Common 1 Power on 2 DRV ON 3 3 5V 4 PDIM 1 5 3 5V 6 PDIM 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12...

Page 58: ... controller operation checking method D Function error_ No response in remote controller key error ALL MODELS A17 Established date Revised date Error symptom Content LCD TV P600 1 GND 2 KEY1 3 KEY2 4 3 5V_ST 5 GND 6 LED_R BUZZ 7 IR 8 GND 9 GND 2013 01 09 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only ...

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