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
5-1 Model 330, 340SC, and 370SC Service Manual
5.0 Troubleshooting
Contents
5.1 General Information ....................................................................................5-1
5.2 Troubleshooting ..........................................................................................5-3
5.3 Break Points ................................................................................................5-5
5.4 Main Menu Structure ..................................................................................5-7
5.1 General Information
This chapter provides information and solutions on probable projector problems,
including Error Codes, Power-On Codes, and Break Points for HJT Model 330,
Model 340SC and Model 370SC Projectors with software version 5.1.0.
The Error Codes listed in Table 5-1 describe possible problems associated with
software and hardware while the projector is operating. The first (1
st
) column of
the table lists the LED letters shown on the rear of the projector, and the second
(2
nd
) column for the first seven (7) letters shows the on-screen text that shows
along with the operator messages (up to 19 characters). The remaining codes
appear without on-screen text—the second (2
nd
) column is the error description.
Status or error codes are flashed for no more than one (1) minute before being
replaced with the neutral beating “0” (zero) at a low light level.
The Power Codes in Table 5-2 show the sequence of codes that occur when the
projector power is first turned on. The first (1
st
) column indicates the LED code
letter or number and the second (2
nd
) column provides a description of the
problem.
Break Point (Trap Processing) Error Codes and Break (Trap) Data Code Displays
are detailed in Table 5-3 and Table 5-4.
The Menu Structure Diagram provides information about the Projector Menu Log
that will help to determine if certain assemblies are due for replacement.
Table 5-5 provides a Troubleshooting Guide to possible problems encountered in
the Model 330, 340SC and 370SC Projector. The first (1
st
) column calls out the
nature of the problem and a possible symptom to check. The second (2
nd
) column
suggests possible solutions. The third (3
rd
) column provides the reference section
in this manual. The fourth (4
th
column supplies the reference section in the
appropriate model Operator's Manual.