SERVICE MANUAL
Model 250 Projector
Phone 760 929-5300 Fax 760
2310 Camino Vida Roble Carlsbad, California
Manufacturer Hughes JVC
DECLARATION OF CONFORMITY
Chapter 1 Introduction
Chapter 2 System Description
Chapter 3 Electrical
Chapter 4 Optical
Chapter 9 Parts
Chapter 7 Troubleshooting
Chapter 8 Software and Protocol
1.0 Introductio n
Contents
1.1 Safety
1.2 Updates
1.3 Acronyms Used
SECAM
2.1 Introduction
Contents
2.0 System De scription
2.2 Electrical Section
Incoming Power Circuit
Power Supplies
Igniter Assembly
2.3 Optical Section
Arc Lamp Module
Optical Path
ILA s - Image Light Amplifier
CRTs
2.4 Electronic Section
Relay Lens Assemblies
Front Projection Lens
Input Cards VICs
Printed Circuit Boards PCB
2.5 Miscellaneous Items
CRT/Yoke Assemblies
Projector Covers
IR Detectors
EMI Shield
Model 250 Service Manual
Chapter 2---System Description
Contents
3.1 Safety
3.0 Electrical
3.2. Incoming Power Circuit
AC Power Cord
AC Circuit Breaker
AC EMI Filter
3.3 Power Supplies
Low Voltage Power Supply LVPS
LVPS - Main Functions
LVPS - Inputs
LVPS - Operation
Arc Lamp Power Supply ALPS
LVPS - Service Adjustments
LVPS - Remove and Replace
3. Remove the front cover see Projector Covers section
ALPS - Inputs
ALPS - Outputs
ALPS - Operation
ALPS - Service Adjustments
ALPS - Remove and Replace
HVPS - Main Functions
High Voltage Power Supply HVPS
3. Remove the front cover see section 6.1 Projector Covers
HVPS - Inputs
HVPS - Outputs
HVPS - Service Adjustments
HVPS - Operation
HVPS - Remove and Replace
Electronic Focus Adjustment
Table 3-1 HVPS - P45 I/O Pinout
10. Disconnect P45 “Control” at upper left of HVPS
3.4 Igniter Assembly
Igniter Assembly - Inputs
Igniter Assembly - Outputs
Igniter Assembly - Operation
3. Remove the front cover see Projector Covers section
Igniter Assembly - Service Adjustments
Igniter Assembly - Remove and Replace
7. Remove the five #1 Pozi-drive Phillips-head screws
4.0 Optical
Contents
Arc Lamp - Service Adjustments
4.1 Arc Lamp
Arc Lamp - Main Functions
Arc Lamp - Inputs
13. Tighten spider lock down bolt
horizontally. Adjust to center the “hot spot”
Model 250 Service Manual
Figure 4-2 Arc Lamp alignment fixture
Chapter 4---Optical
Arc Lamp - Remove and Replace
8. Disconnect large blower fan connector
4.2 Optical Path
Optical Path - Main Function
Optical Path - Operation
Optical Path - Inputs
Optical Path - Outputs
WARNING!!! Wear safety goggles rated X5 when working anywhere near the light path from the arc lamp or the projection lens
Model 250 Service Manual
Figure 4-6 Optical Path
Chapter 4---Optical
4-10
Optical Path - Service Adjustments
Tools Needed 3-mm Hex wrench Parts Needed No serviceable parts
Model 250 Service Manual
Figure 4-7 Optical Path
To adjust the XY Positioner
4.3 ILA
ILA Main functions
ILA Inputs
ILA Outputs
ILA Service Adjustments
ILA Operation
ILA Overlap
14. Loosen the two hex nuts, using a 4-mm hex-head wrench
19. Retighten the two wing nuts and tighten the two hex nuts
NOTE Do not use the zoom lens focus while performing this step
ILA Remove and Replace
Projection Lens - Service Adjustments
4.4 Relay Lenses
4.5 Projection Lens
Projection Lens - Input
Figure 4-11 Projection Lens holding screw and removal notch
3-4-22
Model 100 Service Manual
Chapter 5 Optical
Contents
5.1 Safety
5.0 Electronics
5.2 Introduction
5.3 System Controller PCB
System Controller PCB - Main Function
I/O control for VIC selection Two RS-232 serial interface ports
Model 250 Service Manual
Chapter 5---Electronics
System Controller PCB - Inputs
System Controller PCB - Outputs
System Controller PCB - Operation
Figure 5-6 Power On timing sequence Normal Operation Functions
System Controller PCB - Remove and Replace
Video Processor PCB - Inputs
5.4 Video Processor PCB
Video Processor PCB - Main Functions
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Model 250 Service Manual
Chapter 5---Electronics
Video Processor PCB - Outputs
Video Processor PCB - Operation
Video Processor PCB - Remove and Replace
5.5 Raster Timing Generator PCB
Raster Timing Generator PCB - Main Functions
Raster Timing Generator PCB - Inputs
Raster Timing Generator PCB - Outputs
Raster Timing Generator PCB - Operation
Raster Timing Generator PCB - Remove and Replace
Horizontal Vertical Deflection PCB - Inputs
5.6 Horizontal Vertical Deflection PCB
Horizontal Vertical Deflection PCB - Main Functions
Figure 5-13 Horizontal/Vertical I/O Diagram
Model 250 Service Manual
IICCLK - IIC clock line IICDATA - IIC data line
IICSINT - IIC interrupt
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Model 250 Service Manual
Chapter 5---Electronics
Horizontal Vertical Deflection PCB - Outputs
Vertical Adjustment Pots
Horizontal Vertical Deflection PCB - Operation
Horizontal Vertical Deflection PCB - Service Adjustments
Figure 5-17 Red image needs vertical adjustment increase
Convergence Deflection PCB - Main Functions
5.7 Convergence Deflection PCB
Horizontal Vertical Deflection PCB - Remove and Replace
Convergence Deflection PCB - Inputs
Convergence Deflection PCB - Outputs
Figure 5-19 Convergence Deflection PCB I/O Diagram
Model 250 Service Manual
Chapter 5---Electronics
5-30
Figure 5-20 Convergence Deflection PCB I/O Diagram
Model 250 Service Manual
Chapter 5---Electronics
5-31
Convergence Deflection PCB - Operation
Convergence Deflection PCB - Remove and Replace
Scan Reversal PCB - Inputs
5.8 Scan Reversal PCB
Scan Reversal PCB - Main Functions
Scan Reversal PCB - Outputs
Figure 5-22 Scan Reversal PCB I/O Diagram
Model 250 Service Manual
Chapter 5---Electronics
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5-37
Model 250 Service Manual
Chapter 5---Electronics
Scan Reversal PCB - Operation
front/upright projection. This means the horizontal scan jumper is plugged into J100, the vertical scan jumper is plugged into J53, and the convergence jumper is plugged into J50
Scan Reversal PCB - Service Adjustments
Page
CAUTION! The Model 250 Projector can not be
Orientation
Convergence
Vertical
Video Amplifier PCB - Main Functions
5.9 Video Amplifier PCB
Scan Reversal PCB - Remove and Replace
Video Amplifier PCB - Inputs
Figure 5-26 Video Amplifier PCB I/O Diagram
Model 250 Service Manual
Chapter 5---Electronics
5-45
Video Amplifier PCB - Outputs
Video Amplifier PCB - Operation
Video Amplifier PCB - Remove and Replace
Page
15. Reinstall in the reverse order from above
5.10 CRT/Yoke Assemblies
CRT/Yoke Assemblies - Main Function
CRT/Yoke Assemblies - Inputs
CRT/Yoke Assemblies - Output
CRT/Yoke Assemblies - Service Adjustments
CRT/Yoke Assemblies - Operation
CRT Mechanical Focus
Figure 5-29 CRT Mechanical Focus adjustments CRT Rotation
12. In the Geometry menu, put a check the Reg Enable box
CRT Electronic Focus
CRT/Yoke Assemblies - Remove and Replace
5.11 Video Input Cards VICs
CAUTION! Use extreme caution to avoid bumping
Standard RGBHV VIC
RGBHV VIC - Main Functions
RGBHV VIC - Service Adjustments
RGBHV VIC - Inputs
RGBHV VIC - Outputs
RGBHV VIC - Operation
Graphics Enhancer Plus RGBHV VIC
Grahics Enhancer Plus RGBHV VIC - Main Functions
Graphics Enhancer Plus VIC - Inputs
Graphics Enhancer Plus VIC - Outputs
Graphics Enhancer Plus VIC - Remove and Replace
Graphics Enhancer Plus VIC - Service Adjustments
Graphics Enhancer Plus VIC - Operation
4-Input Quad RGBHV VIC - Inputs
4-Input Quad RGBHV VIC
4-Input Quad RGBHV VIC - Main Functions
Model 250 Service Manual
IIC CLK - IIC clock line IIC DATA - IIC data line
IIC SINT - IIC interrupt line Figure 5-36 4-Input Quad RGBHV VIC
Chapter 5---Electronics
4-Input Quad RGBHV VIC - Service Adjustments
4-Input Quad RGBHV VIC - Outputs
4-Input Quad RGBHV VIC - Operation
4-Input Quad RGBHV VIC - Remove and Replace
YPbPr VIC
YPbPr VIC - Main Functions
YPbPr VIC - Operation
YPbPr VIC - Inputs
YPbPr VIC - Outputs
YPbPr VIC - Service Adjustments
YPbPr VIC - Remove and Replace
Quad Standard Decoder VIC
Quad Standard Decoder VIC - Main Functions
Quad Standard Decoder VIC - Operation
Quad Standard Decoder VIC - Inputs
Quad Standard Decoder VIC - Outputs
Quad Standard Decoder VIC - Remove and Replace
Quad Standard Decoder VIC - Service Adjustments
Quad Standard Decoder/Line Doubler VIC
installed in the #2 or 3 VIC slot it will not fit into the #1 slot, a blank face plate must be installed above it. The blank faceplate is not included with the Quad Standard Decoder/Line Doubler VIC unless it is installed at the factory. The part number for the blank faceplate is p/n
5.12 Backplane PCB
Figure 5-43 Backplane Diagram middle section
see Figure
Figure 5-44 Backplane Diagram right side
Model 250 Service Manual
Chapter 5---Electronics
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Model 250 Service Manual
Chapter 5---Electronics
Contents
6.0 Miscellaneous Items
6.1 Projector Covers
6.2 Electronics Module Tilt-up
6.3 Ventilation
6.6 EMI Filter
6.4 Air Filters
6.5 IR Detectors
6.7 Cleaning Lenses, ILA Assemblies and Mirrors
Model 250 Service Manual
Chapter 6---Miscellaneous Items
Contents
7.0 Troubleshooting
7.1 Safety
7.2 LEDs
Backpanel LEDs
Figure 7-1 Rear Panel layout
Figure 7-2 Dip Switch Block on System Controller PCB
Video Processor PCB LEDs
Video Processor - Test Points
Chapter 7---Troubleshooting
Model 250 Service Manual
Video Processor - LEDs
Raster Timing Generator PCB LEDs
Chapter 7---Troubleshooting
Model 250 Service Manual
Figure 7-6 Raster Timing Generator LEDs
Raster Timing Generator PCB LEDs
Convergence Deflection PCB LED
Chapter 7---Troubleshooting
Model 250 Service Manual
Figure 7-7 Convergence Deflection PCB LED
Video Amplifier PCB LED
Backplane PCB LEDs
7.3 Diagrams
Command ON Timing
to the Arc Lamp Power Supply low. The Arc Lamp Power Supply delivers 170 V to the Igniter, which generates a 32 kV pulse to the Arc Lamp and the Arc Lamp lights. Once the Arc Lamp lights, the Arc Lamp Power Supply, the /LAMPLIT signal goes low and the voltage to the Igniter drops to between 25 V and 31 V. The voltage from the Arc Lamp Power Supply stays at a steady output of 2 kW during normal operation of the projector
Image Path
Deflection Path
The Horizontal Vertical Deflection PCB outputs HOUTFLYBACK to the Scan Reversal PCB. This is the horizontal deflection waveform that drives the horizontal CRT deflection yokes. The HRED+, GRN+, and BLU+ are the horizontal deflection returns. The outputs of the vertical amplifier are VRED+, GRN+, and BLU+. The returns are VRED-, GRN-, and BLU
Chapter 7---Troubleshooting
Model 250 Service Manual
Figure 7-13 CRT Deflection path between Horiz/Vert Deflection PCB
Convergence Deflection PCB and Scan Reversal PCB
Chapter 7---Troubleshooting
Model 250 Service Manual
Figure 7-14 CRT Deflection path between the Scan Reversal PCB and CRT
7-18
CRT Protection
Yoke Connector Detection
Chapter 7---Troubleshooting
Model 250 Service Manual
Figure 7-16 CRT Protection path between the Scan Reversal PCB and CRT
7-21
7.4 Error Codes
“No mem available”
4.17 “VIC1 Board Not OK” /VICOK is High BAD on VIC Slot
7.5 Troubleshooting Guide
Problem
Possible Solution
Check
Troubleshooting on the Backplane PCB
Figure 7-17 Backplane Diagram left side
Chapter 7---Troubleshooting
Model 250 Service Manual
Low Voltage Power Supply J8
Figure 7-19 Backplane Diagram right side
Chapter 7---Troubleshooting
Model 250 Service Manual
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Chapter 7---Troubleshooting
Model 250 Service Manual
Contents
8.0 Software and Protocol
8.1 Software Updating
Cursor=Block & Blink Terminal Font=Fixedsys Translation=None
11B. From the Windows Terminal Menu normally in Accessories window, select Transfers/Send Text File, then select List Files of Type All Files, and select the disk and/or directory with the Model 250 software. You should see a file named boot.hex. Select this file and press the OK button to begin the upload. Uploading takes about 20 minutes 9600 bps
12A. To update the System Software from the Boot Manager prompt
Configuration
8.2 Importing/Exporting
Stop, Pause, Bytes 0, Receiving EXPORT1.TXT
Exporting
4. Windows TERMINAL Transfers + Receive Text File
Importing
Stop, Pause, “% complete bar”, Sending EXPORT1.TXT
Null Modem Adapter
Terminal Preferences
8.3 Terminals and Communication Protocols
Terminals
Table 8-3 VT-100 Terminal and Remote Command Equivalents
Service
Communications Protocol
Action
Center, H
Refer to Section 8.1, Software Updating
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Model 250 Service Manual
Chapter 8---Software and Protocol
9.0 Parts List
9.1 Replacement Parts List
Description
Contents
Power Cord, USA/Japan
Description
Description
9.2 Spares
Quantity
Chapter 9---Parts List
Model 250 Service Manual
Cross-member Assembly
Glossary of Terms
Amorphous
Arc Lamp
Laser Power Supply
Field
Frame
Horizontal Scan
Resolution
Lumen
Luminance
Noise
Vertical Resolution
S-Video
Saturated Color
Scan
Vertical Scan Frequency
Vertical Scan
Vertical Synchronization
Frequency