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 3---Service Adjustments
Model 330, 340SC, 370SC Service Manual 3-1
3.0 Service Adjustments
Contents
3.1 Service (Cover-Off) Power-On Sequence..................................................3-1
3.2 CRT Yoke Rotation....................................................................................3-3
3.3 Vertical Size Tracking................................................................................3-5
3.4 Vertical Linearity Tracking ........................................................................3-6
3.5 Horizontal Size Tracking ...........................................................................3-7
3.6 ILA
®
Bias Settings .....................................................................................3-8
3.7 CRT Mechanical Focus..............................................................................3-9
3.8 Electronic Focus.........................................................................................3-9
3.9 Jumper Settings ..........................................................................................3-13
Front/Rear Jumpers ...................................................................................3-13
Inverted Vertical Jumpers .........................................................................3-15
3.10 G2 Adjustment ...........................................................................................3-16
Sensitivity/Threshold Offset......................................................................3-16
G2 Setting..................................................................................................3-16
3.11 Arc Lamp Alignment and Focus ................................................................3-18
Model 330 Arc Lamp Alignment and Focus.............................................3-18
Model 340SC and 370SC Arc Lamp Alignment and Focus .....................3-20
3.12 Arc Lamp Current Adjustment...................................................................3-21
3.1 Service (Cover-Off) Power-On Sequence
Before applying power to the HJT Model 330, 340SC and 370SC Projector, verify
that the projector is connected to the correct power source (refer to Table 0-1 in
the Safety chapter). If there is any visible damage to any of the cables do not
power on the projector until the damaged cable is replaced.
To turn on projector power:
1. If using a terminal or tethered remote control, connect one or the other to
the input jack marked "Terminal In" on the rear panel of the projector card
cage.
2. Remove the rear cover from the projector.
CAUTION!
If the projector has been operating,
and the rear cover must be removed, be sure to set the
power interlock switch (top right as shown in Photo 3-1)
to
the UP position immediately and turn the projector back on