TM-022 PN 35934
Rev 05/12/98
13
PC-3D
TROUBLESHOOTING
CAUTION
ONLY QUALIFIED MAINTENANCE PERSONNEL SHOULD ATTEMPT THE
FOLLOWING PROCEDURES:
Problem: Lamp will not ignite
Possible Cause
Testing
Corrective Action
Improperly Fastened
Connections
Visually inspect all
input/output connections
(i.e. power cord, lamp).
Secure all connections
Lamp Beyond Useful Life
Replace with known good
lamp and re-test unit.
Replace lamp if defective (typical
life = 1000 hours)
Corroded Negative
Electrode (Brass Bracket)
Visually inspect the
negative electrode for ANY
signs of corrosion.
Replace, if corroded
Main Line Fuse Blown
(Nothing in Unit Operates)
Remove fuse from power
receptacle and check with
an ohmmeter.
Replace fuse, if defective
No High Voltage Off
Transformer Output
Verify ignition voltage off
transformer (refer to Figure
1.2).
Replace transformer, if defective
Insufficient Ignition Voltage
Verify ignition voltage being
supplied to the lamp (refer
to Figure 1.2 for location
and Figure 2.2 for
waveform).
Replace defective component
(typically blocking diode)
No Operating Voltage
(Lamp Flickers)
Verify the operating voltage
(refer to Figure 1.2).
Replace defective component
Problem: Shutter fails to open
Other symptoms: Shutter remains open
Possible Cause
Testing
Corrective Action
Shutter Mechanism
Sticking
Remove power from unit
and manually move the
shutter and solenoid up
and down (should move
freely).
Replace component causing
problem
Solenoid Malfunctioned
Measure the voltage being
delivered to the solenoid
during operation (refer to
Replace solenoid, if defective