LG 55UH950V - Abnormal Power Section; Solder Defect, Short;Crack; Fuse Open, Abnormal Power Section

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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
Important Safety Notice3
General Guidance3
Leakage Current Hot Check Circuit3
Servicing Precautions4
General Servicing Precautions4
Electrostatically Sensitive (ES) Devices4
General Soldering Guidelines4
IC Remove/Replacement5
"Small-Signal" Discrete Transistor5
Circuit Board Foil Repair5
At IC Connections5
Specification6
Application Range6
Requirement for Test6
Model General Specification6
Broadcasting System7
Program Coverage7
Receiving System7
External Input Support Format8
Component Input8
HDMI Input8
DTV Mode8
HDMI Input (PC)9
3D Mode - DTV/HDMI/USB10
RF Input10
Hdmi 1.4/2.010
USB -Photo (3D)13
Usb (3D)13
Miracast, Widi13
Adjustment Instruction14
LAN Inspection14
LAN Inspection Solution14
WIDEVINE Key Inspection14
Lan Port Inspection(Ping Test)15
CI+ Key Checking Method15
LAN PORT Inspection15
Model Name & Serial Number Download15
Wifi Mac Adress Check16
Using RS232 Command16
Manual Adjustment16
Edid Data16
HDMI Deep Color off17
HDMI Deep Color on17
Checksum(Hdmi 1/2/3)18
White Balance Adjustment20
Equipment Connection MAP20
W/B Adj. Objective & How-It-Works20
Command Format20
Auto Adj. Method (Not OLED)21
Manual Adj. Method21
G-Fix Adjustment21
Adj. Condition and Cautionary Items21
EDGE LED White Balance Table22
OLED White Balance22
OLED White Balance Table22
Local Dimming Function Check22
Magic Motion Remote Control Test23
3D Function Test23
EYE Q Inspection (Except Germany)23
Option Selection Per Country23
GND and Internal Pressure Check24
USB S/W Download24
Audio24
Block Diagram25
M1625
F1626
Tuner + CI27
Video & Audio IN/OUT28
Hdmi 2.029
USB / Wi-Fi / M-Remote / UART30
Power31
M16 I2C32
Soc Clock Source & Frequency33
EPI Block (PMIC)34
Exploded View35
Disassembly36
Disassemble Stand36
Disassemble B/C Screw37
Disassemble Back Cover37
Trouble Shooting Guide38
Contents of Standard Repair Process39
Video Error40
No Video/ Normal Audio40
No Video/ no Audio41
Picture Broken/ Freezing42
Color Error43
Vertical/Horizontal Bar, Residual Image, Light Spot44
External Device Screen Error-Color Error44
No Power45
Off When On, off While Viewing, Power Auto On/Off46
Audio Error47
No Audio/ Normal Video47
Wrecked Audio/ Discontinuation/Noise48
Function Error49
Remote Control & Local Switch Checking49
Remote Control(R/C) Operating Error49
MR15R Operating Checking50
Wifi Operating Checking51
Camera Operating Checking52
External Device Recognition Error53
Circuit Noise, Mechanical Noise54
Exterior Defect55
Contents of Standard Repair Process Detail Technical Manual56
Check LCD Back Light with Naked Eye58
Check White Balance Value59
TUNER Input Signal Strength Checking Method60
Version Checking Method61
Checking Method for Remote Control for Adjustment61
TUNER Checking Part62
Connection Diagram63
Check Link Cable (LVDS) Reconnection Condition64
Adjustment Test Pattern - ADJ Key65
Exchange Main Board66
Solder Defect, CNT Broken66
Abnormal Power Section67
Solder Defect, Short/Crack67
Fuse Open, Abnormal Power Section67
Exchange Power Board (PSU)68
No Light68
DIM Light68
Exchange the Module69
Crosstalk69
Press Damage69
Vertical Block70
Vertical Line70
Horizontal Line70
Check Front Power Indicator71
Basic Functions71
Adjusting the Menu71
Check Power Input Voltage and ST-BY 3.5V72
28Pin Map (LPB)72
POWER off MODE Checking Method73
Entry Method73
Checking Method in Menu When There Is no Audio74
Checking Order When There Is no Audio75
Remote Control Operation Checking Method76
Motion Remote, Wi-Fi Operation Checking Method77

LG 55UH950V - Abnormal Power Section; Solder Defect, Short;Crack; Fuse Open, Abnormal Power Section

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