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 3---Service Adjustments
3-6 Model 330, 340SC, 370SC Service Manual
R
328
R
411
R
311
R
211
R
228
R
428
Blue
Vertical
Size
Red
Vertical
Linearity
Blue
Vertical
Linearity
Green
Vertical
Linearity
Green
Vertical
Size
Red
Vertical
Size
R
36
RRR
96
139 171
CAUTION!!!
Do not adjust the pots that are shaded! They are
factory adjusted. Do not adjust the Green Vertical
Size or Green Vertical Linearity unless the Green
Yoke or Green CRT has been replaced.
Figure 3-3
Vertical Size and Linearity Controls on the Vertical Deflection Board.
3.4 Vertical Linearity Tracking
If the vertical linearity is not completely linear, use a small slot screwdriver and
adjust the vertical linearity controls on the Vertical Deflection Board (refer to
Figure 3-2).
NOTE:
The Vertical Linearity pots are factory adjusted and will
not
normally
need adjustment. The Green Vertical Linearity pot (R-211) in particular, should
not need
to be adjusted unless the Green Yoke or Green CRT has been replaced.
If the Green Vertical Linearity is off, however, it should be adjusted.
To adjust vertical linearity:
1. Select Test Pattern 2.
2. Remove the projector cover.
3. Remove the electronics module cover.
4. View Red over Green and position Red (use the POS control and the
arrow keys on the remote) so that the Red lines at the edge match the
Green lines.
5. Adjust the Red Vertical Linearity pot R-411 so that Red linearity matches
Green.
6. Repeat the same procedure for Blue (R-311).
7. Replace the electronics module cover and the projector cover.