dymax PC-3 - TROUBLESHOOTING; Lamp Ignition Issues; Shutter Operation Problems

TM-021 PN 35933
Rev 05/06/97
12
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 a known good
lamp/reflector assembly and re-
test unit.
Replace lamp/reflector
assembly 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 2).
Replace transformer, if
defective.
Insufficient Ignition Voltage
Verify ignition voltage being
supplied to the lamp (refer to
Figure 2 for location and Figure
3 for waveform).
Replace defective component
(typically blocking diode).
No Operating Voltage
(Lamp Flickers)
Verify the operating voltage
(refer to Figure 2).
Replace defective
component.
Problem: Shutter Fails To Open
Other Symptoms: Shutter Remains Open
Possible Cause
Testing
Corrective Action
Shutter Mechanism Binding
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 Figure 2 -
Auxiliary voltage). If good check
solenoid resistance (120
ohms).
Replace solenoid, if defective.
Timer Malfunctioned
If shutter operates in manual
mode but not in timed mode,
timer is defective.
Replace defective timer.