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55UF645T
LG 55UF645T Service Manual
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Established
date
Standard Repair Process Detail
T
echnical Manual
Revised
date
A1
Error
symptom
Content
Check back
light w
ith naked
eye
A
.
V
ideo
error_No
video/Normal a
udio
After turning on
the power and disassembling
the case, check w
ith the
nake
d
eye,
whether
you can see light from locations.
A1
<ALL
MODELS>
Copyright
©
2015
LG
Electronics
Inc.
All
rights
reserved.
Only
for
training
and
service
purposes
LGE
Internal
Use
Only
76
78
Table of Contents
Table of Contents
2
General Guidance
3
Leakage Current Hot Check Circuit
3
Leakage Current Cold Check (Antenna Cold Check)
3
Safety Precautions
3
Service Precautions
4
Electrostatically Sensitive (ES) Devices
4
General Soldering Guidelines
4
Diode Removal/Replacement
5
Circuit Board Foil Repair
5
IC Remove/Replacement
5
"Small-Signal" Discrete Transistor Removal/Replacement
5
Specifications
6
Test Condition
6
Test Method
6
Model Specification
6
External Input Format
7
2D Mode
7
Component Input(Y, C/P, C/P)
7
HDMI Input (PC/DTV)
7
Adjustment Items
9
Application Range
9
Specification
9
Adjustment Instruction
9
MAC Address, ESN, Widevine, HDCP2.0 Key D/L
10
LAN Inspection
10
Model Name & Serial Number Download
11
Wifi Mac Address Check
11
Manual Adjustment
12
EDID (the Extended Display Identification Data) / DDC (Display Data Channel) Download
12
Camera Port Inspection
15
White Balance Adjustment
16
V-COM Adjust
16
Local Dimming Function Check
18
Magic Motion Remocon Test
18
HDMI ARC Function Inspection
18
Color Temperature
18
EYE-Q Green Function Inspection
19
Ship-Out Mode Check (In-Stop)
19
GND and Internal Pressure Check
19
AUDIO Output Check
19
USB S/W Download
20
LM14A + URSA11 Circuit Block Diagram
21
Block Diagram
21
LM14A I2C Block Diagram
22
URSA11 Block Diagram
23
LM14A + URSA11 Power Block Diagram
24
Tuner/CI Block Diagram
25
Video/Audio in Block Diagram
26
Audio out Block Diagram
27
Hdmi
28
Usb / Wifi / M-Remote / Uart
29
Exploded View
30
Main System
31
Main Power
32
Main Ext_In/Output
34
Micom
38
HDMI 3 Input (Rear Horizontal)
39
Jack Common
40
Ir/Key
41
Usb
42
Ethernet Block
43
Audio AMP (NTP7515)
44
TU Circuit
45
Emmc
48
CLIP Top Side for Covershield
49
Heatsink Guide Cap
49
URS All Input
51
Trouble Shooting Guide
57
Contents of Standard Repair Process
58
Video Error
59
Power Error
64
Audio Error
66
Function Error
68
Noise
73
Exterior Defect
74
Contents of Standard Repair Process Detail Technical Manual
75
Video Error_Color Error
83
Exchange Main Board
85
Exchange Power Board (PSU)
87
Exchange the Module
88
Power Error _No Power
90
Audio Error_No Audio/Normal Video
93
Other manuals for LG 55UF645T
Owner's Manual
56 pages
4
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LG 55UF645T Specifications
General
Brand
LG
Model
55UF645T
Category
LED TV
Language
English
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