Sign In
Upload
Download
Table of Contents
Contents
Add to my manuals
Delete from my manuals
Share
URL of this page:
HTML Link:
Bookmark this page
Add
Manual will be automatically added to "My Manuals"
×
Bookmark added
×
Added to my manuals
Manuals
Brands
LG Manuals
LED TV
55LA7400
Service manual
Table Of Contents - LG 55LA7400 Service Manual
Hide thumbs
Also See for 55LA7400
:
User manual
(216 pages)
,
Owner's manual
(72 pages)
,
Owner's manual
(52 pages)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Table Of Contents
121
page
of
121
Go
/
121
Contents
Table of Contents
Bookmarks
Table of Contents
Advertisement
Table of Contents
Contents
2
Safety Precautions
3
Important Safety Notice
3
General Guidance
3
Leakage Current Hot Check
3
Servicing Precautions
4
General Servicing Precautions
4
Electrostatically Sensitive (Es) Devices
4
General Soldering Guidelines
4
Ic Remove/Replacement
5
Power Output, Transistor Device
5
Diode Removal/Replacement
5
Fuse And Conventional Resistor
5
Specification
6
Application Range
6
Test Condition
6
Test Method
6
General Specification
7
Supported Video Resolutions
8
Component 2D Input
8
Component 3D Input
8
Hdmi Input (Pc/Dtv)
9
3D Hdmi Input(1.4B)
10
3D Hdmi-Pc Input
10
3D Hdmi Input(1.3)
11
Usb/Dlna Input
12
3D Auto Detection
12
3D Manual
12
Rf 3D Input(Dtv)
12
Adjustment Instruction
13
Main Pcba Adjustments
13
Adc Calibration
13
Final Assembly Adjustment
13
Lan Port Inspection
14
Edid Download
14
Edid Data
14
White Balance Adjustment
16
Adjustment Command (Protocol)
17
Manual Adjustment
17
Auto Wb Calibration
17
Adjustment Method
17
Option Selection Per Country
18
Country Group Selection
18
Tool Option Inspection
18
Local Dimming Inspection
19
Magic Motion Remote Controller Check
19
Wi-Fi Mac Address Check
19
Using Rs232 Command
19
3D Pattern Test
20
Hdmi Arc Function Inspection
20
Ship-Out Mode Check
20
Audio Output Check
21
Gnd And Hi-Pot Test
21
Usb S/W Download
21
Audio Input Condition
21
Optional Adjustments
22
Manual Adc Calibration
22
Manual White Balance Adjustment
22
Exploded View
23
Content
49
New Features
53
Epi Interface
54
Epi Interface (Mini-Lvds Vs. Epi)
55
Hf Mini-Lvds
55
Epi (Embedded Clock P-To-P Interface)
55
Lcm (T-Con To S-Driver Ic)
55
Main Pcb For Broadband
58
Mtk5398 Block Diagram
60
Video/Audio In Block Diagram
61
Audio Out Block Diagram
62
Hdmi
63
Usb / Wifi / M-Remote / Uart
64
Tuner/Ci Block Diagram
65
Panel Interface Block Diagram
66
M13 I2C Block Diagram
67
Interconnection
69
Introductions Of 13Y Rf Assy + Magic Remote Control
71
System
72
Pairing Information Transmission (Send To Tv After Paired)
72
Pairing Information Transmission Sequence
72
Mr13 Block Diagram
73
Rf Pairing / Un-Pairing Method
74
Introductions Of 13Y Wifi Built In Assy
75
Wifi Built In Assy Feature
76
Block Diagram
76
WIFI Built in Ass'y Specification
77
12Y Widevine & Hdcp 2.0 & Netflx
79
Widevine?
80
Widevine Key
80
Hdcp
81
Why Hdcp2.0?
81
Netflix
81
Dtcp
82
Three Cryptographic Keys
82
Repair Guide
83
Contents Of Lcd Tv Standard Repair Process
84
Contents Of Lcd Tv Standard Repair Process Detail Technical Manual
85
Video Error
86
No Video/ Normal Audio
86
No Video/ No Audio
87
Picture Problem
88
Picture Broken/ Freezing
88
Picture Problem (Dvb-S/S2)
89
Tuning Fail, Picture Broken/ Freezing
89
Color Error
90
Vertical/Horizontal Bar, Residual Image, Light Spot
91
External Device Screen Error-Color Error
91
Power Error
92
No Power
92
Off When On, Off While Viewing, Power Auto On/Off
93
Audio Error
94
No Audio/ Normal Video
94
Wrecked Audio/ Discontinuation/Noise
95
General Function Problem
96
Remote Control & Local Switch Checking
96
External Device Recognition Error
97
Function Error
97
Noise
98
Circuit Noise, Mechanical Noise
98
Exterior Defect
99
Video Error_No Video/Normal Audio
101
Check White Balance Value
101
Video Error_No Video/ Audio
102
Power Board Voltage Measuring Method
102
Tuner Input Signal Strength Checking Method
103
Video Error_Video Error, Video Lag/Stop
104
Lcd-Tv Version Checking Method
104
Checking Method For Remote Controller For Adjustment
104
Lcd Tv Connection Diagram
105
Tuner Checking Part
106
Adjustment Test Pattern - Adj Key
107
Video Error_Color Error
107
Exchange T-Con Board
108
Solder Defect, Cnt Broken
108
Exchange Psu(Led Driver)
110
Exchange The Module
111
Un-Repairable Cases
111
Power Error _No Power
113
Check Front Display Led
113
Check Power Input Voltage And St-By 5V
114
Checking Method When Power Is On
115
Power Off Mode Checking Method
116
Audio Error_No Audio/Normal Video
117
Checking Method In Menu When There Is No Audio
117
Checking Order When There Is No Audio
118
Remote Controller Operation Checking Method
119
Vcom Adjustment
120
Sequence Of The Vcom Adjustment
120
Previous
Page
1
...
120
121
Show Quick Links
Quick Links:
General Guidance
Specification
Exploded View
Repair Guide
Hide quick links:
Permanently
Temporary
Cancel
Advertisement
Table of Contents
Related Manuals for LG 55LA7400
LED TV LG 47LA6900 User Manual
47" class cinema 3d 1080p 120hz led tv with smart tv (46.9" diagonal) (216 pages)
TV LG 47LA6900 Owner's Manual
Led tv (72 pages)
LED TV LG 50LA621Y.AMF Owner's Manual
(56 pages)
LED TV LG 47LA6900 Owner's Manual
(52 pages)
LED TV LG 60PN6500 Owner's Manual
Owners manual (52 pages)
LED TV LG 60LA7400 Owner's Manual
(42 pages)
LED TV LG 55LA860W Owner's Manual
Smart 3d tv with 6 pairs of glasses, cinema screen and built-in wi-fi. magic remote included (44 pages)
LED TV LG 47LA790V Service Manual
Chassis : ld34d (125 pages)
LED TV LG 42LA860V.AEE Owner's Manual
(516 pages)
LED TV LG 60LA Series Owner's Manual
(54 pages)
LED TV LG 32LA620V Owner's Manual
Smart 3d tv with 4 pairs of 3d glasses, freeview hd and built-in wi-fi. (54 pages)
LED TV LG LN56 Series Owner's Manual
(62 pages)
LED TV LG 55LA7900 Owner's Manual
(44 pages)
LED TV LG LA62 Series Owner's Manual
(178 pages)
LED TV LG LN57 ZE Series Owner's Manual
(332 pages)
LED TV LG LA79 Owner's Manual
La79, la86, la97, la98, la96 series led tv applies lcd screen with led backlights (60 pages)
Related Content for LG 55LA7400
79UG880V.AEE Table Of Contents
LG 79UG880V.AEE
32LX570H Table Of Contents
LG 32LX570H
19LV2520 Table Of Contents
LG 19LV2520
LA61 Table Of Contents
LG LA61
LB63 Series Table Of Contents
LG LB63 Series
LED TV Table Of Contents
LG LED TV
LA643x Table Of Contents
LG LA643x
LB63 Series Table Of Contents
LG LB63 Series
LN54 Table Of Contents Table Of Contents
LG LN54
LN54 Table Of Contents
LG LN54
LA62 Series Table Of Contents
LG LA62 Series
32LN52 Series Table Of Contents
LG 32LN52 Series
LA62** Table Of Contents
LG LA62**
23MA73D Table Of Contents
LG 23MA73D
22MA53D Table Of Contents
LG 22MA53D
LN5400-ZA Table Of Contents
LG LN5400-ZA
This manual is also suitable for:
55la7400-ud
Table of Contents
Print
Rename the bookmark
Delete bookmark?
Delete from my manuals?
Login
Sign In
OR
Sign in with Facebook
Sign in with Google
Upload manual
Upload from disk
Upload from URL