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
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Chapter 4—Maintenance
Model 330, 340SC, and 370SC Service Manual
4-11
Example:
If the center brightness is 20 foot-candles, the ideal edge
brightness should be 10 foot-candles.
CAUTION!
Do not allow roll-off to be greater than 4:1
or damage to the Cold Mirror could result. Refer to Section 3.11
information on how to check roll-off.
3.
In some cases it may also be necessary to adjust the vertical and horizontal
orientation of the collimating lens to achieve maximum brightness.
CAUTION!
This adjustment can be sensitive
and should not be attempted unless all other measures have
been tried first. To do this, loosen the three (3) mounting
screws on the rear of the condenser lens mount (
see
Figure
4-6
) and move the collimating lens to orient the hot-spot
(brightest area) to the center of the screen.
4.5 System Power Supply
The System Power Supply is located immediately forward of the electronics card
cage.
To remove the system power supply (see Figure 4-4 and Figure 4-5 and Figure
4-7):
1.
Unplug the projector. Allow at least one (1) minute for high voltage to
bleed off before proceeding.
2.
Remove the rear projector cover (Section 4.2).
3.
Remove the two (2) screws from the Plexiglas cover over the terminal
block (top of SPS, forward-Figure 4-1) and remove cover.
4.
Label and remove the arc lamp ignitor cables, J503 and J504, and the
shield ground wire from the DC terminal block.
5.
Remove the Plexiglas cover from the AC input terminal block located on
the right side of the power supply (see Figure 4-7).
6.
Ensure power is disconnected then remove the three (3) AC input wires
from the AC terminal block:
Green (or Yellow/Green) left terminal (Ground).
White (or Blue) middle terminal (Neutral).
Black (or Brown) right terminal (Hot).
NOTE:
Colors may be different, depending on country of use.