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 5-10
Problem and
Symptom to
Check
Possible Solution Service
Manual
Operator
Manual
Image out of focus
Spacer balls not
visible.
Set projection lens focus so ILA
®
spacer balls are visible.
4.5
ILA
®
Spacer balls
visible but
image fuzzy.
Adjust CRT Mechanical Focus. 3.7 4.7.2
CRT focus range is
limited and
image is fuzzy.
Adjust electronic focus. 3.8 4.7.3
CRT focus not
effective.
Set Relay Lens against back stop.
CRT focus not
effective.
Ensure ILA
®
assembly is installed
correctly and clamps are snug.
4.12
CRT focus limited
due to focus rod
range.
Readjust fixed rod at upper left of
CRT mounting bracket.
3.7
Image blurry with
shadow on right
edge.
Replace ILA
®
Assembly.
4.12
Characters do not
appear legible.
Replace ILA
®
Assembly.
4.12
CRT focus problem
limited to single
color.
Replace CRT. 4.7
G2 mis-adjusted. Reset G2. 3.10
Sensitivity offset set
too high.
Reset sensitivity offset.
Picture geometry
Picture not
centered.
Adjust using
P
HASE
and
P
OSITION
.
4.8
Picture size
incorrect.
Adjust using
S
IZE
and
B
LANKING
.
Picture wrap around
left or right
edge.
Reset left or right
B
LANKING
.
Retrace lines on
raster.
Reset
T
OP
B
LANKING
.