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
ix
Model 330, 340SC, and 370SC Service Manual
!
CRT yoke assemblies and other proximity electrical assemblies, components and
wiring—if performing the yoke rotation or width adjustment (outlined in Section
3.2), always use an
!
ANSI/ASTM 10,000 volt rated safety glove.
!
Periodically check the condition of safety gloves for cracks.
!
Arc Lamp main power ± posts.
Power Supply
The projectors operate from power sources indicated in the table below. Verify that local
power source matches these requirements before operation!
Projector Power Supplies
Power
330
340SC
370SC
AC
200-240V
200-240V
200-240V
Current
20
20
30
Hz
50-60
50-60
50-60
Watts
2,700
3,325
4,550
Handle the power cord carefully and avoid excessive bending.
A damaged cord may cause electric shock or fire. For continued safe and reliable
operation, only use cables supplied by the manufacturer for power and signal connections.
Installation should be performed by an electrician with current knowledge of electrical
codes in the country of use.
Fluid Safeguards
Certain components of the projector contain fluid. If any fluid from the projector contacts
the skin, wash off with soap and water. If any fluid from the projector splashes into the
eyes, rinse with cool running water.
Ventilation and Foreign Object Retrieval
Ensure the projector’s multiple fans are free from obstructions and operating properly.
Air filters are located at vent ports on the cover. Air filters require periodic cleaning to
ensure adequate cooling of the projector (see Section 4.3). Verify that vent ports are clear
of all obstructions.
Keep the projector free from foreign objects, such as hairpins, nails, paper, etc. Do not
attempt to retrieve such objects yourself or insert metal objects such as wire and
screwdrivers inside the unit. If an object falls inside the projector, unplug the projector
immediately and call a Hughes-JVC certified technician for removal.