LG 49SJ800V Service Manual Download Page 30

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B. Power error

No power

Power LED

On?

DC Power on

by pressing Power Key

On Remote control

Normal

operation?

Check Power
On ‘”High”

Check Power cord

was inserted properly

Check
Logo LED

Replace

Power

B/D

Measure voltage of each output of Power B/D

Normal

voltage?

Replace Main B/D

OK?

Replace Main B/D

Normal?

Check ST-BY 3.5V

Replace Power B/D

Normal

voltage?

Replace Power

B/D

☞

A17

☞

A18

☞

A18

☞

A18

Standard Repair Process

Established

date

Revised date

6/16

Error

symptom

. Stand-By: Red or Turn On

. Operating: Turn Off

Close

Only for training and service purposes.

Summary of Contents for 49SJ800V

Page 1: ...49SJ800V ZB 55SJ800V 55SJ800V ZB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL LED TV SERVICE MANUAL CONFIDENTIAL Copyright 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 2: ...ghts reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE 10 BLOCK DIAGRAM 11 EXPLODED VIEW 18 DISASSEMBLY GUIDE 19 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: ...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 electrostati...

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: ...ia Estonia Lithuania Poland Portugal Romania Albania Bosnia Slovakia Belarus DTV MPEG2 4 DVB T2 11 countries UK Ireland Sweden Denmark Finland Norway Ukraine Kazakhstan Russia Italy Croatia Serbia DTV MPEG2 4 DVB C 37 countries Germany Netherland Switzerland Hungary Austria Slovenia Bulgaria France Spain Italy Belgium Russia Luxemburg Greece Czech Croa tia Turkey Morocco Ireland Latvia Estonia Lit...

Page 7: ...2 3 3 4 5 6 7 8 16 QAM 1 2 2 3 3 4 5 6 7 8 64 QAM 1 2 2 3 3 4 5 6 7 8 DVB T2 Model L V Z T2 only Model Guard Interval Bitrate_Mbit s 1 4 1 8 1 16 1 32 1 128 19 128 19 256 Modulation Code Rate QPSK 1 2 2 5 2 3 3 4 5 6 16 QAM 1 2 2 5 2 3 3 4 5 6 64 QAM 1 2 2 5 2 3 3 4 5 6 256 QAM 1 2 2 5 2 3 3 4 5 6 DVB C Symbolrate 4 0Msymbols s to 7 2Msymbols s Modulation 16QAM 64 QAM 128 QAM and 256 QAM DVB S S2 ...

Page 8: ... 00 24 000 63 36 HDTV 1080P 17 1920 1080 33 71 29 97 79 120 UDTV 2160P 18 1920 1080 33 75 30 00 79 20 UDTV 2160P 19 1920 1080 56 25 50 00 148 50 UDTV 2160P 20 1920 1080 67 432 59 94 148 350 UDTV 2160P 21 1920 1080 67 50 60 00 148 50 UDTV 2160P 22 1920 1080 135 00 120 00 297 00 UDTV 2160P DVB 23 1920 1080 135 00 119 88 296 703 UDTV 2160P 24 1920 1080 112 5 100 00 297 00 UDTV 2160P 25 3840 2160 53 9...

Page 9: ...on 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 00 VESA SVGA 5 1024 768 48 36 60 00 65 00 VESA XGA 6 1360 768 47 71 60 01 84 75 VESA WXGA 7 1152 864 54 34 60 05 80 00 VESA 8 1280 1024 63 98 60 02 109 00 SXGA Support to HDMI PC 9 1920 1080 67 50 60 00 158 40 WUXGA ...

Page 10: ...ow 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 2 NSU 1 Menu All Settings General About This TV 2 Click CHEK FOR UPDATES system check newest version 3 Click DOWNLOAD AND INSTALL 4 TV is updating 5 After finished the update below Pop up appear ...

Page 11: ... SYSTEM EEPROM 256Kb USB2 2 0 USB3 2 0 eMMC 4GB Sub Micom DDR3 2133 X 16 512MB X 2EA P_TS X_TAL 24MHz I2S Out H P AV D Demod I2C 2 R E A R S I D E R E A R H HP AMP SPDIF OUT BLUTOOTH IR KEY EYE WIFI SUB ASSY IR KEY Tuner I2C 5 I2C CVBS SIF Tuner COMP ARC X_TAL 32 768kHz OCP 1 5A OCP 1 5A HDMI4 2 0 Component AV Spec out In Europe Component Spec Out In North America BLOCK DIAGRAM 1 SOC Block Diagram...

Page 12: ...3 IF_P 7 IF_N 8 AB28 TP_DVB_DATA0 AC28 TP_DVB_DATA1 AD28 TP_DVB_DATA2 AD29 TP_DVB_DATA3 AE29 TP_DVB_DATA4 AE30 TP_DVB_DATA5 AF29 TP_DVB_DATA6 AF30 TP_DVB_DATA7 3 3V_TUNER 1 2Kȳ 33 ȳ TPO_DATA 0 7 CI_IN_TS_DATA 0 7 CI Slot 100 ȳ TPI_DATA 0 7 CI_TS_DATA 0 7 PCM_WE PCM_OE PCM_IRQA PCM_REG PCM_INPACK PCM_WAIT PCM_RESET CI_TS_DATA 0 7 CI_ADDR 0 14 PCM_IORD PCM_IOWR PCM_CE1 2 CI_TS_VAL CI_CD1 2 CI 5V Pow...

Page 13: ...JACK AV A A 1 ACK Jack Side SOC Side SPDIF_OUT SPDIF OUT H P JACK HP_LOUT_JACK HP_ROUT_JACK AM14 IEC958OUT AL15 AUDA_OUTL AM15 AUDA_OUTR SPDIF_OUT_ARC PHY0_ARC_OUT COMP2 AV_L_IN COMP2 AV_R_IN AL18 AUAD_L_CH2_IN AM18 AUAD_R_CH2_IN AUAD_L_CH2_IN AUAD_R_CH2_IN HP AMP TPA6138 ARC OUT HDMI2 Front Speaker Woofer Speaker MICOM AMP_RESET SCK LRCK DACLRCH I2C_SCL_0 SDA_0 I2S GPIO23 Audio AMP NTP7515 Audio ...

Page 14: ...UT_ARC HDMI_HPD_2 CEC_REMOTE Port_1 DDC_I2C_1 HDMI_HPD_1 HDMI2 0 LGE PHY HDCP1 4 HDCP2 2 HDCP1 4 HDCP 2 2 HDMI2 0 LGE PHY HDMI2 0 LGE PHY 5V 5V 5V HDMI 4 2 0 _H HDCP1 4 HDCP2 2 HDMI 3 2 0 _H CEC_REMOTE Port_3 DDC_I2C_3 SPDIF_OUT_ARC HDMI_HPD_3 HDMI2 0 LGE PHY 5V HDMI2_3_HPD HDMI2_3_SDA HDMI2_3_SCL HDMI2_2_HPD HDMI2_2_SDA HDMI2_2_SCL HDMI2_1_HPD HDMI2_1_SDA HDMI2_1_SCL HDMI2_0_HPD HDMI2_0_SDA HDMI2...

Page 15: ...WIFI_POWER_ON USB2_2_DP0 DM0 SOC_RX TX USB3_0_DP0 DM0 USB3_0_RX0_P M USB2_1_DP0 DM0 USB2 0_2_DP1 DM1 USB2 0_3_DP0 DM0 USB2_0_DP0 DM0 UART1_RXD TXD Debug Wafer UART1_RX TX JK6200 RS232C phone Jack SOC_RX TX UART wafer SOC_RX TX US model only USB 1 3 0 _V USB 2 2 0 _H USB 3 2 0 _H WIFI_EN 3 5V_WIFI OCP GPIO90 USB_CTL1 5V_USB_1 OCP GPIO95 USB_CTL2 5V_USB_2 OCP GPIO34 USB_CTL3 5V_USB_3 UART0_TXD GPIO1...

Page 16: ...M ZZ LNB IR KEY EYE XWW ZUZr EYE_I2C_SDA EYE_I2C_SCL 3 5V_ST 33pF 18pF Cap Ready I2C_SCL4 AJ21 SCL4 I2C_SDA4 AH21 SDA4 I2C_SCL1 AK22 SCL1 I2C_SDA1 AJ22 SDA1 I2C_SCL3 AH24 SCL3 I2C_SDA3 AJ24 SDA3 I2C_SCL0 AK23 SCL0 I2C_SDA0 AJ23 SDA0 I2C_SCL2 AH23 SCL2 I2C_SDA2 AH22 SDA2 I2C_SCL5 AH25 SCL5 I2C_SDA5 AH26 SDA5 Tuner XUYr GOl P 3 3V_TU ZZ 47pF 3 3V_NORMAL ZUZr PMIC EPI WAFER Vx1 33 AUDIO AMP 100 33pF ...

Page 17: ... GAMMA Voltage 8 CH OUTPUT I2C_2 VCC HVDD VGH VEPI VGL2 VCOM1 2 Level shifter CLK 1 8 60P EPI Output LEFT P gamma 8CH 0 60 P gamma 8CH CLK 1 8 CLK 1 8 VDD VEPI Vterm HVDD VCOM1 2 VGL1 2 VGH VST RESET VGH_E O VDD VEPI Vterm HVDD VCOM1 2 VGL1 2 VGH VST RESET VGH_E O LOCK CK_IN CLK 1 8 CLK 1 8 EPI 6 Lane EPI 6 Lane VCOM1FB VCOM2FB PANEL_VCC PANEL_VCC VDD Vterm VCOM1FB VCOM2FB VST RESET VGH_E O M16p 7...

Page 18: ...stics 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 AR2 A10 700 200 820 530 540 521 800 570 571 500 121 120 400 LV1 LV2 200A 951 952 901 902 ...

Page 19: ...ights reserved Only for training and service purposes DISASSEMBLY GUIDE 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 After Screw Disassemble please remove B C from Module 49 Screw 15 ea f f f f 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 f f f f f 2 55 Screw 17 ea ...

Page 21: ...rights reserved Only for training and service purposes 4 IR assy WiFi PCB assy disassembly 4 Disassemble screw 1ea and Remove wi fi cable Remove IR cable and Disassemble Latch 1ea Screw 1 ea 5 Screw disassembly Screw 9 ea 4 4 4 4 4 4 4 4 4 ...

Page 24: ...ng power auto on off 7 8 C Audio error No audio Normal video 8 9 Wrecked audio discontinuation noise 9 10 D Function error Remote control Local switch checking 10 MR15RA operating checking 11 11 12 Wifi operating checking 12 13 Camera operating checking 13 14 External device recognition error 14 15 E Noise Circuit noise mechanical noise 15 16 F Exterior error Exterior defect 16 First of all Check ...

Page 25: ...d or 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 or EP...

Page 26: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 27: ...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 28: ...rror Check 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 2017 LG Electronics Inc ...

Page 29: ... HDMI DVI by 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 Mai...

Page 30: ...e 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 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 2017 LG Electronics Inc All rights reserved Only for training and ser...

Page 31: ...EY 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_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Dow...

Page 32: ... 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 8 16 Error symptom Standard Repair Process 8 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 33: ...rnal 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 34: ...heck 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 3 5v 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 10 16 Error s...

Page 35: ...ablished date Revised date 11 16 Error symptom 11 Replace MR15RA 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 Copyr...

Page 36: ...ifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date 12 16 Error symptom 12 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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 37: ...mera Ver is NULL Y N Reconnect the Camera module Standard Repair Process Established date Revised date 13 16 Error symptom 13 Change the Camera module Normal operation Close Y N Replace Main B D A25 A4 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 38: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 39: ...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 40: ...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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 41: ...king 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 Vx1 EPI reconnection condition A7 8 Adjustment Test pattern ADJ Key A8 9 Appendix Defected Type caused by T Con Inverter Module Exchange Main Board 1 A 1 5 10 Exchange Main Board 2 A 2 5 11 Exchange Power Board PSU A 3 5 12 Exchange Module 1 A 4 5 13 E...

Page 42: ... MODE checking method A11 17 C Audio error_ No audio Normal video Checking method in menu when there is no audio A12 18 Voltage and speaker checking method when there is no audio A13 19 D Function error Remote control operation checking method A14 20 Motion Remote operation checking method A15 21 Wifi operation checking method A15 Continued from previous page Copyright 2017 LG Electronics Inc All ...

Page 43: ...tent Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations A1 49SJ80 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 44: ...date A1 Error symptom Content Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations A1 55SJ80 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 45: ...tent Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations A1 60SJ80 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 46: ...tent Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations A1 65SJ80 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 47: ...Normal audio A2 Entry method 1 Press the ADJ button on the remote control for adjustment 2 Enter into White Balance of item 10 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 ALL MODELS Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 48: ...20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A3 Established date Revised date Error symptom Content A3 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 49: ...r 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 v Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 50: ...ch 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 ALL MODELS A5 Established date Revised date Error symptom Content A5 49 55 60 65 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 51: ...ical 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 ALL MODELS Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 52: ...X1 EPI reconnection 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 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 53: ...6 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 A8 Established date Revised date Error symptom Content A8 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 54: ...CNT Broken 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 Main Board 1 A 1 5 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 55: ...normal Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange Main Board 2 A 2 5 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 56: ...Appendix Exchange Power Board PSU No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 57: ...odule 1 A 4 5 Crosstalk Crosstalk Press damage Press damage Un repairable Cases In this case please exchange the module Press damage Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 58: ...rtical 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 A 5 5 Un repairable Cases In this case please exchange the module Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 59: ...ck front Power Indicator B Power error _No power A9 Established date Revised date Error symptom Content A9 ST BY condition On or Off Power ON condition Turn Off Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 60: ...ical Manual Revised date A10 Error symptom Content Check power input voltage and ST BY 3 5V B Power error _No power A10 SJ80 49 55 49 55 60 65 Check the DC 13 2V Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 61: ...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 A11 Established date Revised date Error symptom Content A11 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 62: ...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 A12 Established date Revised date Error symptom Content A12 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 63: ...eaker 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 A13 Established date Revised date Error symptom Content A13 1 SPK_R FT 2 SPK_R FT 3 SPK_L FT 4 SPK_L FT SJ80 Copyright 2017 LG Electronics In...

Page 64: ...Remote control operation checking method D Function error A14 Established date Revised date Error symptom Content A14 SJ80 Checking order to check remote control IR EYE Sensor IR LOGO light Rear IR Eye Pin Pin name 1 VCC 2 USB_DM 3 USB_DP 4 GND 5 WOL WIFI_ON 6 VCC 7 COMBO_RESET 8 GND 9 BT_WAKEUP_DEVICE 10 BT_WAKEUP_HOST 11 GND 12 GND 13 14 15 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 V...

Page 65: ...ain board 2 Check the 3 5V on the terminal 22 Checking order to check motion remote wifi Wifi BT Front Wifi BT Rear Pin Pin name 1 VCC 2 USB_DM 3 USB_DP 4 GND 5 WOL WIFI_ON 6 VCC 7 COMBO_RESET 8 GND 9 BT_WAKEUP_DEVICE 10 BT_WAKEUP_HOST 11 GND 12 GND 13 14 15 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 VCC 23 KEY2 24 KEY1 25 GND SJ80 Copyright 2017 LG Electronics Inc All rights reserved O...

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