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Chapter 5---Troubleshooting
Model 330, 340SC, and 370SC Service Manual 5-8
Table 5-5
Troubleshooting Guide
Problem and
Symptom to
Check
Possible Solution Service
Manual
Operator
Manual
No Power
Main input power. Reset circuit breaker. 3-1
System Power
Supply main
circuit breaker.
Reset System Power Supply circuit
breaker. Reset interlock switch
to the U
P
position.
3.1,
Figure 3-1
System Power
Supply circuit
breaker fails
when reset?
Verify input power is correct.
Replace defective System Power
Supply
4.5
Power Interlock
Switch.
Test switch operation.
If defective, replace switch.
Figure 3-1
Projector cover not
enabling
interlock switch.
Reposition rear cover. 4.2
System Power
Supply shuts
down during
power up
sequence.
Re-seat circuit boards. 4.11
No Picture
Correct channel
selected.
Select correct channel input. 4.2
Arc Lamp turned
off.
Restart projector. 3.1 4.1
System power
turned off.
Restart projector. 3.1
Video source. Verify video source is turned on,
properly connected.
"HIDE" command
invoked.
Un-hide video using
H
IDE
/M
ODE
.
Table 5-1
Color Cutoff. Turn on R,G, B. Press R, G, B and
CUTOFF.
No video or raster
on only one
CRT.
Replace defective CRT or Video
Amplifier Board.
4.8, 4.9
Raster present but
no video image.
Replace Video Amplifier Board or
Video Processor Board.
4.11