Projector Service Manual
Table Of Contents
- DECLARATION OF CONFORMITY
- BZSAFE.PDF
- CH1INTRO.PDF
- CH2SYSDE.PDF
- Functional Descriptions
- Contents
- Cover and Base
- External Power Requirements
- Electronics Systems Overview
- System Power
- Card Cage
- Circuit Boards
- Raster Timing Generator Board (RTG) p/n 100568
- Sync Generator
- Sync Detector and Selector
- Serration and Equalization Lockout
- Phase Locked Loop
- VSYNC Detector, Field Separator, and Mux
- Adjustment Counters
- Serial Communication
- Raster Timing Generator I/O
- Interlocks and Protection
- Horizontal Deflection Board P/N 102523 (HDB)
- Vertical Oscillator
- Horizontal Phase Locked Loop
- Horizontal Centering
- Horizontal Power Supply
- Flyback Switching
- Geometric Correction
- Output Section
- Horizontal Sweep Failure Detection
- Serial Communication
- Horizontal Deflection Board I/O
- Interlocks and Protection
- Vertical Deflection Board P/N 102521(VDB)
- Vertical Preamps
- Vertical Amplifiers
- Sweep Failure Detection
- Side Pincushion and Keystone Correction
- Horizontal Linearity Correction
- Top and Bottom Pincushion and Keystone Correction
- Correction Amplifiers
- Serial Communication
- General I/O
- Interlocks and Shutdowns
- Video Processor Board P/N 104672 (VPB)
- Decoder
- Video/Sync Mux
- V & H Sync Strip
- SG Sync Strip
- B, G, and R Brightness and Contrast Amplifiers
- On-Screen Switch
- Gamma Correction
- Switch Logic and Video Enable
- RGB Sensitivity and Threshold Amplifier
- ILA® Bias
- Dynamic Focus Amplifier
- Serial Communication
- General I/O
- Interlocks and Protection
- Video Amplifier Board P/N 103567 or 103774 (VAB)
- Video Signal
- Failure Detection
- Beam Current Sense
- DC Restore
- Arc Protection
- Blanking
- Enable Circuit
- Focus
- Filament Supply
- General I/O
- System Controller Board P/N 104668 (SCB)
- General Functional Description
- CPU
- Working and Compressed Memory
- Expanded Memory
- Correction Address Generator
- DACs
- DSP
- Overlay Memory
- Overlay Address Generator
- Overlay Interface
- LED Display Buffers and Logic
- RS232 Interface
- IR Interface
- IIC Interface
- Serial Interface
- General I/O
- Backplane Board p/n 100571
- Optical Section
- Image Light Amplifier
- Functional Descriptions
- CH3ADJST.PDF
- CH4MAINT.PDF
- Maintenance Remove/Replace)
- Contents
- Introduction
- Projector Covers
- Ventilation Filters
- Arc Lamp Assembly
- System Power Supply
- Electronics Module
- Cathode Ray Tube (CRT)
- Video Amplifier Board (VAB)
- CRT Yoke
- High Voltage Power Supply (HVPS)
- Card Cage (Printed Circuit Boards)
- Image Light Amplifier Assembly
- Projection Lens
- (SCB) Socket Battery Replacement
- Recommended Spares
- Maintenance Remove/Replace)
- CH5TRBSH.PDF
- HGLOSS.PDF
Chapter 3---Service Adjustments
Model 330, 340SC, 370SC Service Manual 3-7
3.5 Horizontal Size Tracking
The horizontal width coils are factory adjusted and will not normally need
adjustment. In general, if the R and B vertical lines are within two (2) crosshatch
lines of each other, they can be brought in line with the Convergence procedure. If
the R or B horizontal size does not match G within two crosshatch lines, adjust
the Horizontal Width coils on the R and B Deflection Yokes (refer to Figure 3-1).
The width coils are mounted on a small circuit board on top of the Yoke assembly
inside a white ceramic holder and the adjustment is accessed from the opening at
the end of the ceramic holder.
WARNING!!!
To prevent possible electrical shock
when performing the width coil adjustment always wear
ANSI/ASTM 10,000 volt rated safety gloves for protection from the
high yoke voltages that are present. Make sure the gloves are not
cracked.
To adjust the horizontal size tracking:
1. Remove the rear cover and electronic module cover by removing the
2.5mm Allen screw holding the electronics module in place and tilting the
electronics module (see CAUTION! below) back to gain access to the
yoke.
CAUTION!
Remove anything plugged into the
rear electronics jacks or the plugs could be badly damaged
when the electronics module is tilted back.
2. View G and R.
3. Using the POS and arrow keys, position Red over Green so that each edge
of the pattern has the same amount of error. Adjust the Red coil until the
edges align.
4. Use a small plastic hex screwdriver to turn the red coil core (the red CRT
is on the right side looking from the rear) clockwise or counterclockwise
until the Red horizontal size matches Green.
5. Cutoff R and view G and B.
5. Use a small plastic hex screwdriver to turn the blue coil core (the blue
CRT is
on the left side looking from the rear) clockwise or counterclockwise until
the Blue horizontal size matches Green.
6. Tilt the electronics module back into place.
7. Replace the allen screw from Step 1 above.