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
3-22 Model 330, 340SC, 370SC Service Manual
2. Measure the number of millivolts between pins 3 and 4 on SPS J505.
NOTE:
This circuit is designed so that the number of millivolts between
these pins (for Models 340 and 370, it is millivolts divided by 10)
represents the lamp current in amps.
3. Multiply the two (2) figures from Item 1 and from Item 2 together.
4. Divide the product from Step 3 by 1 for Model 330 wattage. Divide the
product from Step 3 by 10 to get wattage for Model 340SC or 370SC.
5. Adjust the Lamp Current Adjust pot (see
CAUTION
below Table 3-1
)
on
the top of the SPS (refer to Figure 4-3) until this result is within the
appropriate HJT model spec indicated in Table 3-1).
Example (for Model 370SC):
Voltage measured between J503 and
J504 = 28V and voltage measured between pins 3 and 4 of J505 =
1070mv.
The product of this is 29960÷10 = 2996W. This result is within the Model
370SC spec of 3000W ± 25W and would not require adjustment.
Table 3-2
Arc Lamp Current and Amp Specs
Model 330 Model 340SC Model 370SC
1500 Watts ± 25W 2000 Watts ± 25W 3000 Watts ± 25W
68 Amps Normal 80 Amps Normal 100 Amps Normal
70 Amps Maximum 85 Amps Maximum 110 Amps Maximum
CAUTION!
Make adjustments in small increments to ensure lamp
integrity (lamp overheating may occur if current is abruptly increased). Do not
increase the current beyond the maximum levels listed in Table 3-2.