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LCD1550X-BK
NEC LCD1550X-BK Manuals
Manuals and User Guides for NEC LCD1550X-BK. We have
1
NEC LCD1550X-BK manual available for free PDF download: Service Manual
NEC LCD1550X-BK Service Manual (209 pages)
LCD DISPLAY
Brand:
NEC
| Category:
Monitor
| Size: 11.76 MB
Table of Contents
Table of Contents
3
Service Manual
1
1 Circuit Description
7
Power Circuit
7
Detailed Description of each Circuit
8
Pseudo-Resonance Circuit Method
8
Switching Circuit Operation
9
Description of Operation
10
Latch Circuit
12
Overheat Protection Circuit
12
Protection Circuit
12
Overvoltage Protection Circuit
13
Basic Specifications
14
PWB-MAIN Basic Specifications
14
PWB-MAIN Circuit Block Diagram
15
Video Input Signal Specifications
17
Video Interface Peripheral Circuit
18
Horizontal/Vertical Synchronizing Signal Input Circuit
19
Composite Sync V Separation Circuit
20
Sync on Green Synchronization Separating Circuit
21
TMDS Receiver
23
Input Signal Presence Judgment Function
24
Input Signal Switching Control Function
27
DDC Interface Peripheral Circuit
30
DDC Switching Control Function
31
DDC2BI/DDC CI Function (Only DVI-I Connector Side)
34
EDID Data Write Protect Control Function
35
Power Peripheral Circuit
36
DC/DC Converter and Panel Power Specifications
37
Power Rising/Falling Edge Sequence Control Function
43
Reset Circuit
45
Panel Interface
46
Inverter Circuit
48
Basic Configuration
48
Circuit Block Diagram
48
Input/Output Terminal Functions
49
Detailed Description of each Circuit
50
Power Input Section
50
Lamp Drive Circuit Section
50
Protection Circuit Section
51
Lamp Current Detection Protection Circuit
51
Overvoltage Protection Circuit
51
Fuse
52
Protection Circuit Operation Timer Circuit
52
2 Adjustment Procedure
56
Application
56
Measurement Instruments Used
56
Standard Setting State
56
Names of each LCD Monitor Part, and Adjustment Methods
57
Configuration of Front Control Panel
57
OSM Operation Method
57
Configuration of Signal Input / Power Input Section
58
PWB, Mechanism and Appearance Inspection
59
Mechanism and Appearance Inspection
59
Visual and Conductivity Check
59
Initial Writing in EEPROM Data
61
PWB Adjustment
61
General Adjustment and Inspection
61
Confirming Operation of Operation SW and Functions
61
Inspection of Picture
61
Preparation
61
Aging
62
BIAS Adjustment
62
BRIGHT-LIMIT Adjustment
62
Confirming Color Coordination of Liquid Crystal Panel
62
Confirming OSM Picture During Heat Running
62
GAIN Adjustment
62
Main Adjustment
62
Configuration of DDC (EDID) Data
63
Inspection
67
Confirming Automatic Adjustment Function
67
Confirming Composite Sync. Signal
67
Confirming D-SUB Input Connector
67
Confirming Digital Input
67
Confirming Frequency Range (Confirming Preset Timing)
67
Confirming Sync. on Green Signal
67
Confirming the Operation of Operation SW
67
Electric Performance
67
Frequency Change Speed
67
Confirming Color Selecting (Accucolor) Function
68
Confirming Power Management Function
68
Ground Resistance
68
Isolation Voltage
68
Shock Test
68
Picture Performance
69
Picture Performance Inspection
69
Confirming Color Coordination
70
Panel Inspection (Luminance / Color Coordination / Defect)
70
Liquid Crystal Display Defect Standards
71
Condition of Appearance Inspection
71
Definition of Applicable Area
71
Environment for Inspection
71
Picture Pattern
71
Scope of Inspection
71
Standards for Display Conditions (Standard for Errors/Defects)
72
Outgoing Inspection
75
Checking the Labels, Etc
75
OSM Default Setting
75
Packaging Specifications
75
Timing Chart
76
OSM Display Matrix
77
3 Trouble Shooting
82
4 Waveform
87
5 Schematic Diagram
99
Technical Specification
112
Table of Contents
114
Foreword
115
Product Specifications
116
General Description (Quick Reference)
116
3 Electrical Characteristics
117
Input Signals
117
Signal Level
117
Power Supply
117
Power Management
117
4 Functions
118
Front Control SW
118
OSD Function
118
OSM Control
118
OSM USER Menu
118
Control Lock Mode
119
Input Signal Connectors
119
Analog Video Input
119
Digital Interface Signals
119
DDC
120
Other Functions
120
Auto Setup Function
120
Expand Function
120
5 Screen Performance
121
Test Condition
121
Luminance
121
Color Temperature
122
Geometry
122
Rotations
122
6 Mechanical Specifications
123
Cabinet Tilt Base
123
Rating Label
123
Carton Box
123
Weight
123
Accessories
123
7 Environment Condition
124
Temperature, Relative Humidity & Altitude
124
Vibration Test(Packing)
124
Swept Sine
124
Drop Test (Packing)
124
8 TFT LCD Panel Specifications
125
Defect, Scratch and Dust
128
Inspection Criteria
129
Notice for Handling
133
Appendix I Preset Signal Timings
134
Appendix II EDID Code
135
Appendix III Preset Timing Chart
139
Appendix IV Regulation
140
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