LG 65UH8500 - Page 123

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Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Solder defect, Short/Crack

Fuse Open, Abnormal power section

Noise

GRADATION

Abnormal Display

Appendix : Exchange Main Board (2)

A - 2/5

Only for training and service purposes

LGE Internal Use Only

Main Page

Contents2
Safety Precautions3
General Guidance3
Leakage Current Cold Check3
Leakage Current Hot Check Circuit3
Important Safety Notice3
Servicing Precautions4
General Servicing Precautions4
Electrostatically Sensitive (ES) Devices4
General Soldering Guidelines4
IC Remove/Replacement5
"Small-Signal" Discrete Transistor Removal/Replacement5
Power Output, Transistor Device Removal/Replacement5
Diode Removal/Replacement5
Application Range6
Test Condition6
Test Method6
General Specification6
Module Specification7
External Input Format8
2D Mode8
Component Input8
HDMI Input (PC/DTV)8
3D Mode10
HDMI Input 1.4B10
Hdmi 1.4/2.011
HDMI-PC Input11
Adjustment Instruction14
PCB Assembly Adjustment Method14
LAN Test(Ping-Test)14
Main S/W Program Download15
Input Tool Option15
EDID D/L Method15
ADC Calibration17
Check SW Version17
Camera Port Inspection17
SET Assembly Adjustment Method18
Input Area-Option18
Adjustment of White Balance18
LAN Inspection19
LED White Balance Table19
Medium / Warm Mode19
WIDEVINE Key Inspection20
Model Name & Serial Number D/L20
Wi-Fi MAC Address Check20
Local Dimming Inspection20
GND and Hi-Pot Test21
Motion Remote Controller Inspection21
AUDIO Output Check21
3D Function Test21
HDMI ARC Function Inspection22
PIP/W&R Function Inspection22
DDC Adjustment Command Set22
DDC Command Protocol23
RS-232C Command Protocol23
Bluetooth S/W Upgrade by Using USB Drive Input23
Signal TABLE23
Block Diagram25
Audio out Block Diagram31
Hdmi32
Usb / Wifi / M-Remote / Uart33
Exploded View34
System Configuration35
Renesas MICOM55
Spdif out59
Wifi/Bt Connector61
Ethernet Block68
Ntp_Amp_Front70
Non-Reverse83
Emmc I/F84
Contents of Standard Repair Process95
Video Error96
No Video/ Normal Audio96
No Video/ no Audio97
Picture Broken/ Freezing98
Color Error99
Vertical/Horizontal Bar, Residual Image, Light Spot100
External Device Screen Error-Color Error100
Power Error101
No Power101
Off When On, off While Viewing, Power Auto On/Off102
Audio Error103
No Audio/ Normal Video103
Wrecked Audio/ Discontinuation/Noise104
Function Error105
Remote Control(R/C) Operating Error105
MR15R Operating Checking106
Wifi Operating Checking107
Wifi Operating Error107
Camera Operating Checking108
Camera Operating Error108
External Device Recognition Error109
Circuit Noise, Mechanical Noise110
Exterior Defect111
Contents of Standard Repair Process Detail Technical Manual112
Check LCD Back Light with Naked Eye114
Video/Normal Audio114
Check White Balance Value115
TUNER Input Signal Strength Checking Method116
Version Checking Method117
TUNER Checking Part118
Connection Diagram119
Check Link Cable (EPI) Reconnection Condition120
Adjustment Test Pattern - ADJ Key121
Exchange Main Board122
Exchange Power Board (PSU)124
Exchange the Module125
Check Front Power Indicator127
Check Power Input Voltage and ST-BY 3.5V128
POWER off MODE Checking Method129
Checking Method in Menu When There Is no Audio130
Audio Error_No Audio/Normal Video130
Voltage and Speaker Checking Method When There Is no Audio131
Remote Control Operation Checking Method132
Function Error132
Motion Remote, Wi-Fi Operation Checking Method133

LG 65UH8500 - Page 123

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