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
5-11 Model 330, 340SC, and 370SC Service Manual
Problem and
Symptom to
Check
Possible Solution Service
Manual
Operator
Manual
Video has shadow
on left or right
edge.
Correct using
M
ENU
P
OSITION
and
P
INCUSHION
P
OSITION
.
Video image not
squared.
Correct using
P
INCUSHION
P
OSITION
and
K
EYSTONE
.
Video image bowed
at left/right edge
or top/bottom.
Correct using
P
INCUSHION
left/right
arrow.
Picture horizontal
linearity.
Correct using
L
INEARITY
and
E
DGE
L
INEARITY
.
XY Convergence
Linearity different
between colors,
cannot converge.
Yoke not properly set on CRT. 3.2
Horizontal size
different
between colors.
Adjust horizontal sizing coil on
yoke.
3.5
Vertical size
different
between colors.
Set vertical size and linearity
adjustment on Vertical
Deflection Board.
3.3, 3.4
Not enough range in
Red/Blue XY
convergence.
Adjust Red or Blue
P
OSITION
to
compensate.
4.8.9
Picture color
balance
Missing either Red,
Green, or Blue
video.
ILA
®
assembly bias voltage bad or
no video-replace Video
Processor Board.
4.11
Red, Green, or Blue
lacks color.
Replace ILA
®
assembly or Video
Amplifier Board.
4.12, 4.8
Internal gray scale
correct but
incorrect video
color.
Readjust
C
ONTRAST
adjustments.
Dim area on screen
when viewing
flat field.
Adjust collimating lens. 4.4
Black video image
overdriven.
Adjust
T
HRESHOLD
,
G2
and
B
RIGHTNESS
.
3.10 4.6, 4.10