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 2—Functional Description
Model 330, 340SC and 370SC Service Manual 2-31
IICDATA
IIC data line. Bi-directional serial line for synchronous data transfer
between SCB and other circuit boards. See detailed description for
list of signals transferred and data direction.
Raster Timing Generator
Inputs
Description
/VFBST
Signal to control the vertical oscillator frequency and retrace timing
/HSYNCR
Regenerated horizontal sync signal
Outputs
Description
/HVFLBCK
Pulse signal representing horizontal flyback used to determine phase of
image
Vertical Deflection Board
Inputs
Description
GEOCORR
Periodic signal for L/R keystone and L/R pincushion correction
FLRCLING
TTL level indicating whether or not raster is inverted
Outputs
Description
VERTDR
Pulse output from vertical oscillator.
HLINR
DC voltage controlling horizontal edge linearity correction
HFDBK
DC voltage proportional to the H power supply output voltage
WIDTH
DC voltage indicating commanded width.
TBKEYCOR
DC voltage representing commanded top and bottom keystone correction
HSENSRED
DC voltage, high when flyback pulse for red yoke is present at normal
frequencies.
HSENSBLU
Similar to HSENSRED.
HSENSGRN
Similar to HSENSRED.
Main Horizontal Deflection Coils
Inputs
Description
/INLCK
Return from series daisy-chain for sensing yoke connectors installed.
Outputs
Description
+INLCK
Negative voltage supply from the horizontal power supply to the daisy-
chained yoke connector interlock.
+BHORYK
Positive supply from the centering current source to the blue horizontal
main deflection coil.
-BHORYK
Return from the blue horizontal main deflection coil to the horizontal
deflection power transistor.
+GHORYK
Similar to +BHORYK.
-GHORYK
Similar to -BHORYK.
+RHORYK
Similar to +BHORYK.
-RHORYK
Similar to -BHORYK.