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 5---Troubleshooting
5-3 Model 330, 340SC, and 370SC Service Manual
LED On-Screen Text Description
x
Problem with decoder module data.
y
Problem with decode input.
#
Loss of horizontal sweep detected.
Codes indicating a software bug—system should keep running.
G
Internal error code not recognized.
H
Incoming command not recognized.
J
Internal password control code bad.
K
DAC reference not recognized.
L
Timer table reference not valid.
M
IIC reference not recognized.
N
RTG reference not recognized.
P
Internal convergence axis reference invalid.
Q
Internal channel parameter reference not recognized.
R
Internal convergence data index invalid.
5.2 Power-On Codes
The projector performs a series of operations when power is turned on. Codes for
these operations are shown on a LED display at the rear of the projector.
Operations are divided into two (2) sets:
1. The first (1
st
) set occurs when standby power is applied. For example, the
projector is plugged into a proper outlet and the circuit breaker on the side
of the projector is ON.
2. The second (2
nd
) set takes place when the user issues a “power-on”
command. For example, presses “Control-P” on a VT-100 terminal or
“POWER ON” on the I/R or tethered remote.
First Set
The first (1st) set of operations occurs when the +5volts is activated to the SCB
prior to applying power to the projector (standby mode). After the +5volts is
applied, the LED should display a zero or #—if not displayed, there is a problem
with the SCB.
Verify the following conditions:
1.
Verify that +5volts and +24volts standby LEDs are lit. If STB +5volts and
+24volts are not present, verify that the projector is plugged into a proper
outlet and that the circuit breaker on the right side of the projector is on. If