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TROUBLESHOOTING (continued)
Bulb goes out during operation.
1. Xenon power supply overheated; thermal switch open. Check power supply blower(s), air inlets
and outlets unobstructed.
2. Lamphouse blower B1 obstructed of overheated. Blower motor is theramlly protected and will shut
off if if overheated; blower will re-start when temperatures fall to safe levels. Clean dust and dirt
from blower squirrelcage.
3. Lamphead blower B1 failed. Check for 230 V.AC at 2 & 3; replace blower if defective.
4. Lamphouse air pressure switch S4 faulty. Check for correct actuation; replace as required.
5. Defective bulb. Check for scorched electrodes or discolored envelope.
Excessive light flicker.
1. Faulty or aged bulb. Check for cracked or sagging electrodes; replace if defective.
2. Defective rectifier diode(s). Dismount and test diodes (see Page 16); replace defective unit(s).
3. Excessive ripple in DC output. See power supply troubleshooting.
Reduced light output.
1. Normal bulb aging. Increase output current. DO NOT EXCEED MAXIMUM CURRENT SPECIFIED BY
BULB MANUFACTURER.
2. Soiled reflector. Clean using commercial glass cleaner. USE NO ABRASIVES.
3. Soiled cowl glass. Clean as required.
4. Leaking bulb. Check for high current and low voltage; white or bluish discoloration of envelope.
Replace as required.
Extremely long duration between ignition pulses.
1. Low DC "No Load" from xenon power supply. Check "No Load" voltage; see power supply
manual.
2. Defective spark gap E1. A "Ping" sound is normal; excessive "Hissing" is abnormal. Replace if
defective.
3. Low AC voltage to lamphead. Check for 230 V.AC at 3 & 4; if below 190 volts, check generator.
4. Defective timer chip on igniter PC board. Replace as required.
Elapsed Time Meter (M3) Fails to Record Hours.
1. Current Detector PCB not in contact with DC lead. PCB must be tie-wrapped to the insulation of
one of the heavy DC output leads from the xenon power supply.
2. Defective component on current detector PCB. Repair or replace. Secure replacement board to
DC lead as instructed in Step 1.
3. Defective hour meter, Replace as required.
20
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