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Chapter 5---Troubleshooting
5.3. Troubleshooting Guide
Table 5-2 shows some common projector problems, what to check when problems occur, possible
solutions and the section in this Service Manual (If User's Guide contains pertinent information, the
appropriate section will be given) that provides some related information on the problem.
Table 5-3. Troubleshooting Guide.
PROBLEM
No Power
No Picture
Arc Lamp
5-6
CHECK
Main Circuit Breaker on
Projector rear panel.
Main Circuit Breaker fails
when reset.
Power Interlock Switch
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.
POSSIBLE SOLUTION
Reset Circuit Breaker.
Verify input power is
correct. Replace
defective Low Voltage
Power Supply or Arc
Lamp Power Supply.
Test switch operation. If
defective, replace switch.
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
4.5 and 4.6
4.2
User's Guide 4.6
User's Guide 4.3.
User's Guide 4.3.
User's Guide 3.5.
4.15, 4.13
4.4
4.6, 4.5, 4.4
4.4
Model 220 Service Manual
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