LG OLED55E7 series Service Manual Download

Page: 33 / 42

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

C. Audio error

Wrecked audio/ discontinuation/noise

Wrecked audio/

Discontinuation/

Noise for

all audio

Check and replace
speaker and
connector

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Connect and check
other external
device

Normal

audio?

Check and fix external device

Replace Power B/D

Normal

voltage?

Check input
signal
-RF
-External Input
signal

Signal

normal?

(When RF signal is not
received)
Request repair to external
cable/ANT provider

Check audio
B+ Voltage (20V)

Replace Main B/D

(In case of
External Input
signal error)
Check and fix
external device

Replace Main B/D

End

Established

date

Revised date

Error

symptom

Standard Repair Process

☞

A12+A9

Summary of Contents for OLED55E7 series

Page 1: ... ED71F MODEL OLED55E7 OLED55E7 Z CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL OLED 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 17 DISASSEMBLY GUIDE 18 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: ...atvia 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 ...

Page 7: ...e QPSK 1 2 2 3 3 4 5 6 7 8 16 QAM 1 2 2 3 3 4 5 6 7 8 64 QAM 1 2 2 3 3 4 5 6 7 8 DVB T2 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 QA...

Page 8: ... 74 25 HDTV 1080I 15 1920 1080 26 97 23 976 63 296 HDTV 1080P 16 1920 1080 27 00 24 000 63 36 HDTV 1080P 17 1920 1080 33 71 29 97 79 120 HDTV 1080P 18 1920 1080 33 75 30 00 79 20 HDTV 1080P 19 1920 1080 56 25 50 00 148 50 HDTV 1080P 20 1920 1080 67 432 59 94 148 350 HDTV 1080P 21 1920 1080 67 50 60 00 148 50 HDTV 1080P 22 1920 1080 135 00 120 00 297 00 HDTV 1080P 23 1920 1080 135 00 119 88 296 70 ...

Page 9: ...60P When HDMI1 2 3 4 UHD DEEP COLOUR ON 5 1 2 HDMI Input PC No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remarks 1 640 350 31 468 70 09 25 17 EGA 2 720 400 31 469 70 08 28 32 DOS 3 640 480 31 469 59 94 25 17 VESA VGA 4 800 600 37 879 60 31 40 00 VESA SVGA 5 1024 768 48 363 60 00 65 00 VESA XGA 6 1360 768 47 712 60 015 84 75 VESA WXGA 7 1152 864 54 348 60 053 80 00 VESA 8 1280 1024 6...

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: ...1 2 0 HDMI2 2 0 HDMI3 2 0 SYSTEM EEPROM 256Kb USB2 2 0 USB3 2 0 eMMC 8GB 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 X_TAL 25MHz I2C CVBS SIF Tuner COMP ARC X_TAL 32 768kHz OCP 1 5A OCP 1 5A AV Component Spec Out HDMI4 2 0 BLOCK DIAGRAM 1 SOC ...

Page 12: ...emod_Core 13 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 ...

Page 13: ...P2_Y_IN_SOC COMP2_Pb_IN_SOC COMP2_Pr_IN_SOC 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...

Page 14: ..._OUT_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 _V CEC_REMOTE Port_3 DDC_I2C_3 SPDIF_OUT_ARC HDMI_HPD_3 HDMI2 0 LGE PHY 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: ... IC WIFI_DP DM MICOM WOL 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...

Page 16: ...N SOC MICOM 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...

Page 17: ...0 200T 541 EXPLODED VIEW 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 manufactur...

Page 18: ...aining and service purposes DISASSEMBLY GUIDE FAB30016101 M4 8mm Black 1EA 1 Disassemble Stand 2 Disassemble Power Cord Bracket FAB30016103 M4 12mm Black 4EA 1 Remove the screws 4EA 2 Grasp the top bottom side and pull in the direction of arrow 3 Separate the stand ...

Page 19: ...01 M4 8mm Black 4EA FAB30016103 M4 12mm Black 4EA FAB32418704 M3 5 5mm Gray 6EA 3 Disassemble Back Cover 4 Disassemble Speaker Box Assy 1 Remove the screws 4EA 2 Grasp the left side of back cover and lift the back cover 3 Separate the back cover 1 Remove the screws 10EA 2 Separate the speaker box assy ...

Page 20: ...rposes FAB31639801 M4 10mm Black 4EA FAB31639801 M4 10mm Black 1EA 2 1 3 5 Disassemble Stand Supporter Bracket 6 Disassemble IR Bracket Separate the Cable 1 Remove the screws 4EA 2 Separate the stand supporter bracket 1 Separate the cable 2 Remove the screw 1EA 3 Separate the IR bracket ...

Page 21: ...r End of left right side 3 Grasp the center of bottom deco and push in the direction of front 4 Separate the bottom deco after lift it FAB31639801 M4 10mm Black 11EA 3 2 3 4 8 Disassemble Speaker Box Top 1 Remove the screws 11EA 2 Lift the speaker box top after grasp the center 3 Lift the speaker box top after grasp the end side 4 Separate speaker box top after remove the cable through the hole ...

Page 23: ...ff 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 MR15RA 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 i...

Page 24: ...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 Error symptom A Video error No video Normal audio A9 A9 A4 A2 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D Vx1 Cable Speaker Cable IR B D Cabl...

Page 25: ...o audio 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 A9 Established date Revised date Error symptom 2 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 26: ...ing By using Digital signal level meter By using Diagnostics menu on OSD All Settings 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 Established date Revised date Error symptom 3 N Y Close N S W Upgra...

Page 27: ...heck external device and cable 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 A6 N Y End Replace module Request repair for external device cable Color error Check Test pattern A15 A7 Standard Repair Process Established date Revised date Error symptom 4 Copyright 2017 LG Electronics Inc All rights reserved On...

Page 28: ...DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main B D Module Screen normal Check screen condition by input External Input AV HDMI DVI Request repair for external device 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 B D Module Screen normal N...

Page 29: ...asure 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 7 8V Replace Power B D N Y Normal voltage Replace Power B D Y A8 A9 A9 A9 Standard Repair Process Established date Revised date 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 service ...

Page 30: ...place 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 A10 A9 Established date Revised date Error symptom Standard Repair Process 7 Abnormal 1 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purpo...

Page 31: ...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_ERR...

Page 32: ...ce Power Board and repair parts Check Speaker disconnection N Y connecting Speaker Replace MAIN Board End C Audio error No audio Normal video A11 A12 A9 Disconnection Established date Revised date Error symptom Standard Repair Process 9 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 33: ...External 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 20V Replace Main B D In case of External Input signal error Check and fix external device Replace Main...

Page 34: ...m Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A13 Normal Voltage Close N N Check 7 8V on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A9 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A13 Replace Main B D Y A13 Standard Repair Process Established date Revised date Error sympt...

Page 35: ...s show ok message N N N Y Replace MR15RA Turn off on the set and press the wheel Press the back key about 5sec If you conduct the loop at 3times change the MR15RA Y Check the INSTART menu RF Receiver ver is 00 00 Y Check Repair RF assy connection N Down load the Firmware INSTART MENU 12 RF Remocon Test Receiver Firmware download Y RF Receiver ver is 00 00 N A14 A4 A4 Close Close Close Close 12 Cop...

Page 36: ...r Wifi cable connection N Check the Wifi wafer 1pin Standard Repair Process Established date Revised date Error symptom 13 Change the Wifi assy Normal Voltage Y Y N Replace Main B D Wi Fi Mac value is NG N A14 A4 A4 A14 Close Close Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 37: ...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 Error symptom Standard Repair Process 14 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 38: ...ceed 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 Error symp...

Page 39: ...lace cabinet Replace remote control Remote control damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date Error symptom Standard Repair Process 16 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 40: ... 6 A Video error _Vertical Horizontal bar residual image light spot Connection diagram A6 7 A Video error_ Color error Check Link Cable Vx1 reconnection condition A7 8 Adjustment Test pattern ADJ Key A19 9 Appendix Defected Type caused by Cable Main Power Module Check Cable 1 A 1 6 Check Cable 2 A 2 6 Exchange Main Board 1 A 3 6 Exchange Main Board 2 A 4 6 Exchange Main Board 3 A 5 6 Exchange Powe...

Page 41: ...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 E Etc Check items after Main B D replacement A18 19 E Etc Adjustment Test pattern A19 20 E Etc How to use JIG Power B D Diganostic Smart ...

Page 42: ...d date A1 Error symptom Content Check Vx1 lock A Video error_No video Normal audio Check a voltage of R7624 after turn on the TV If the voltage is low Vx1 is locked OK R7624 0 V A1 Copyright 2017 LG Electronics Inc All rights reserved Only for training and service purposes ...

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