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
Safety
vii
Model 330, 340SC, and 370SC Service Manual
Avoid Projector Angles of 15° to 23°
Due to voids in the prism fluid there is a dead zone of 19° ± 4°. For this reason, avoid
projector angles of 15° to 23°.
Maximum Projector to Screen Angle is 15°
The maximum vertical tilt angle from projector to screen is 15°. This is the maximum
amount of keystone correction that is possible.
Heat Safeguards
Fans
The projector has multiple fans (exact number varies with projector model number) to
cool the projector system. Do not block the intake or outflow of any of the fans.
Intense heat is emitted within the system and must be properly dissipated in order to keep
the system running properly.
CAUTION!
Do Not Block Ventilation. Blocking air intake or exhaust
ports can lead to projector overheating. Do not enclose the unit in a restricted
space. Refer to the appropriate
Operator’s Manual
for physical access and
thermal clearance and for specific clearances needed for heat dissipation. Allow
at least ten (10) minutes for projector cool down before removing power.
CAUTION!
Do not unplug the power cord until after the arc lamp fan
has stopped running. This fan protects the arc lamp from overheating.
Light Safeguards
Ultra Violet and Infrared Light
Eye/face protection is required from ultra violet light and infrared light in accordance
with the following conditions:
1.
X3 (up to 375 nanometers) shade goggles must be worn by anyone near the
projector when the lamp is lit and the cover is off.
2.
X5 (375 to 700 nanometers) shade goggles when actually working on the
projector near the arc lamp source.