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JVC 250 User Manual
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Chapter 7---Troubleshooting
Model 250 Service Manual
7-9
Convergence Deflection PCB LED
Figure 7-7
Convergence Deflection PCB LED.
The Convergence Deflection PCB has only one
LED. It illuminates green when
power (±15 V) is present on the PCB.
146
148
Table of Contents
Table of Contents
3
Default Chapter
1
Service Manual
1
Declaration of Conformity
2
Chapter 1 Introduction
5
Safety
5
Updates
6
Acronyms
6
Chapter 2 System Description
8
Introduction
8
Optical Section
8
Electrical Section
9
Optical Section
10
Electronic Section
11
Electronic Section
12
Miscellaneous Items
14
Chapter 3 Electrical
17
Safety
17
Incoming Power Circuit
18
Ac Power Cord
18
Power Supplies
19
Igniter Assembly
31
4.0 Optical
34
Default Chapter
34
Optical Path
34
Chapter 4 Optical
35
Arc Lamp
35
Optical Path
40
Ila
46
Projection Lens
53
5.0 Electronics
56
Chapter 5 Electronic
56
Relay Lenses
53
Safety
56
Leds
57
Introduction
57
System Controller PCB
58
System Controller PCB
61
Video Processor PCB
66
Diagrams
67
Video Processor PCB
68
Raster Timing Generator PCB
71
Raster Timing Generator PCB
72
Horizontal Vertical Deflection PCB
76
Horizontal Vertical Deflection PCB
79
Convergence Deflection PCB
83
Convergence Deflection PCB
84
Scan Reversal PCB
89
Video Amplifier PCB
98
Crt/Yoke Assemblies
106
Vics
113
Standard RGBHV VIC
114
4-Input (Quad) RGBHV VIC
119
Ypbpr VIC
122
Quad Standard Decoder VIC
125
Quad Standard Decoder/Line Doubler VIC
127
Backplane PCB
129
6.0 Miscellaneous Items
133
Chapter 6 Miscellaneous Items
133
Projector Covers
133
Electronics Module Tilt-Up
134
Ventilation
135
Air Filters
136
IR Detectors
136
EMI Shield
136
Cleaning Lenses, ILA Assemblies, and Mirrors
137
7.0 Troubleshooting
139
Error Codes
139
Troubleshooting Guide
139
Leds
140
Backpanel Leds
140
Video Processor PCB Leds
143
Raster Timing Generator PCB Leds
145
Convergence Deflection PCB Leds
147
Video Amplifier PCB Leds
148
Backplane PCB Leds
149
Diagrams
150
Image Path
152
Deflection Path
153
CRT Protection
157
Error Codes
160
Troubleshooting Guide
163
Troubleshooting on the Backplane PCB
164
8.0 Software and Protocol
168
Chapter 7 Troubleshooting
168
Chapter 8 Software and Protocol
168
Software Updating
168
Configuration
172
Importing/Exporting
172
Exporting
173
Importing
174
Null Modem Adapter
176
Terminal Preferences
177
Terminals
177
Terminals and Communication Protocol
177
Communications Protocol
178
Chapter 9 Parts
182
Replacement Parts List
182
Glossary
186
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JVC 250 Specifications
General
Brand
JVC
Model
250
Category
Projector
Language
English
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