Troubleshooting Guide - JVC 250 Service Manual

7.5 Troubleshooting Guide

Table 7-3 lists some common projector problems, what to check when problems
occur, and offers possible solutions. It indicates the section in this Service Manual
that provides some related information on the problem. If the User's Guide
contains pertinent information, the appropriate section will be given.
Table 7-3 Troubleshooting Guide
Problem
No Power
No Picture
Arc Lamp
Model 250 Service Manual
Check
Main Circuit Breaker on
Projector rear panel.
Main Circuit Breaker
fails when reset.
Projector cover not
enabling interlock
switch?
Correct channel input &
VIC selected?
Arc Lamp turned off.
System power turned off. Restart projector.
Signal source
HIDE command
invoked?
One color is missing.
No image or raster on
one CRT.
Arc Lamp will not light.
Clicking noise is heard
when projector is turned
on.
Clicking noise not
audible when projector is
turned on.
Arc Lamp ignites but will
not stay lit.
Chapter 7---Troubleshooting
Possible Solution
Reset Circuit Breaker.
Verify input power is
correct. Replace defective
Low Voltage Power
Supply or Arc Lamp
Power Supply.
Reposition projector
cover.
Select correct channel
and VIC.
Restart projector.
Verify signal source is
turned on and properly
connected.
Unhide image with the
HIDE key on the remote.
Turn on the missing color
with the HIDE key.
Replace defective CRT or
Video Amplifier Board.
Replace worn out Arc
Lamp.
LVPS, ALPS, or Ignitor
faulty. Replace LVPS,
ALPS, or Ignitor.
Replace defective Ignitor. Section 3.4
Section
Section 3.2
Section 3.2
Section 6.1
User's Guide
section 4.6
User's Guide 4.3.
User's Guide 4.3.
User's Guide 3.5.
Section 6.9, 6.10
Section 4.1
Section 3.3, 3.4
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