LG 55LA7400-UD Manuals

Manuals and User Guides for LG 55LA7400-UD. We have 2 LG 55LA7400-UD manuals available for free PDF download: Service Manual, Owner's Manual

LG 55LA7400-UD Service Manual

LG 55LA7400-UD Service Manual (121 pages)

Brand: LG | Category: LED TV | Size: 12.63 MB

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
Final Assembly Adjustment
16
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

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LG 55LA7400-UD Owner's Manual

LG 55LA7400-UD Owner's Manual (42 pages)

Brand: LG | Category: LED TV | Size: 3.67 MB

Table of Contents

Important Safety Instructions
2
Viewing 3D Imaging
6
Licenses
7
Open Source Software Notice
7
Table of Contents
8
Installation Procedure
9
Assembling and Preparing
9
Unpacking
9
Optional Extras
11
Parts and Buttons
12
Lifting and Moving the TV
13
Setting up the TV
14
Attaching the Stand
14
Mounting on a Table
15
Tidying Cables
17
Mounting on a Wall
18
Making Connections
19
Connecting to an Antenna or Cable
19
Connecting to a HD Receiver, DVD Player or VCR
20
HDMI Connection
20
DVI to HDMI Connection
21
Connecting to a Mobile Phone
22
Component Connection
23
Composite Connection
24
Connecting a PC
25
HDMI Connection DVI to HDMI Connection
25
Connecting to an Audio System
27
Digital Optical Audio Connection
27
Connecting Headphones
28
Connecting a USB Device
28
Magic Remote Control
30
Registering Magic Remote Control
30
How to Use Magic Remote Control
30
Precautions to Take When Using the Magic Remote Control
30
Watching Tv
31
Turning the TV on for the First Time
31
Using the User Guide
32
Specifications
33
External Control Device Setup
36
Maintenance
37
Cleaning Your TV
37
Screen, Frame, Cabinet and Stand
37
Power Cord
37
Troubleshooting
37

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