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 5---Troubleshooting
Model 330, 340SC, and 370SC Service Manual 5-12
Problem and
Symptom to
Check
Possible Solution Service
Manual
Operator
Manual
Bright Red, Green
or Blue area on
screen limited to
corners or edge.
Adjust ILA
®
Assembly Bias
and
S
HADING
.
3.6 4.10
Gray scale green in
bright levels.
Subtract Green
S
ENSITIVITY
offset,
add Red and Blue.
4.10, 4.11
Gray scale red in
bright levels.
Subtract Red
S
ENSITIVITY
offset,
add Green and Blue.
Gray scale blue in
bright levels.
Subtract Blue
S
ENSITIVITY
offset,
add Green and Red.
Picture—various
problems
Out of focus blurry
area on image
limited to R, G,
or B.
Clean oily spot off CRT, Prism, or
Projection lens.
Small dark line or
dot in R, G, or B
image.
Scratch in optics or CRT burn.
Bubbles in R, G, or
B image.
Replace affected ILA
®
assembly. 4.12
Image Ghost on
video.
Replace Burn-In CRT or ILA
®
assembly.
4.7, 4.12
Reversed ghost
image on screen.
If projecting through glass, prevent
light
from reflecting back into the
lens
Picture lacks depth
of field.
Adjust
Contrast
and
Brightness
.
4.12.1,
4.12.2
Video jitter and
noise.
Replace Video Processor Board. 4.11
Video jitter present
at only one
source.
Replace Raster Timing Generator. 4.11
Video image is not
level.
Level projector or rotate CRT
Yoke.
3.2
Black band at top of
video.
Remove air bubbles from Prism.