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CAUTION: To prevent bulb ignition when checking the AC control circuit, remove the #6
lead running from the igniter at the terminal post on the lamphouse base pan. Tape the exposed lead
to prevent shorting out the circuit.
Check the 115 V.AC control circuit in the lamphouse at the door switch, then the control leads
at terminals #9 and #12 (the "side" blower on 40002 lamp). The door interlock switch must be
manually actuated to energize this circuit.
The air flow from the top blower will move the actuating lever on switch S4, and the exhaust
draft should close switch S5. With the MODE switch in the "MAN." position, and the LAMP switch
in the "ON" position, the elapsed time meter should start to indicate elapsed time. If this meter does
not operate, check for continuity at the LAMP and MODE switches. Check continuity of the air flow
switches; both should read 0 Ohms between "NO" and "COM" when actuated. A defective elapsed
time meter will not prevent bulb ignition. Replace lead #6.
With the LAMP switch in the "ON" position, a distinct high voltage arc ping at the igniter
spark gap should be heard, and a flash from the xenon bulb should be visible through the ammeter, as
DC voltage is applied to the bulb electrodes.
If the high voltage ping or the flash at the ammeter is not apparent, check the DC "No Load"
voltage between the lamphouse and power supply. Again disconnect lead #6 running from the igniter
at the terminal strip on the lamphouse base. Tape the end of the disconnected lead and close and
secure the lamphouse door.
Press the switch above the ammeter, and the meter will indicate the "No Load" DC voltage
supplied to the lamphouse when the LAMP switch is turned "ON." This voltage will vary between
different types of power supplies. See your power supply manual for its correct "No Load" rating.
The standard 40913 igniter printed board in the Ultra 80 is designed for use with a Strong
switching power supply with high DC "No Load" voltage. Consult the factory if using an older high
reactance xenon power supply with normally lower DC "No Load" voltage.
If the correct voltage for the power supply being used is not indicated on the meter, the prob-
lem is in the lamphouse/power supply interconnecting cable, or in the power supply. See the trouble-
shooting guide in the power supply manual for additional instructions and tests. Replace lead #6 on
the terminal strip on the lamphouse base.
If the high voltage arc is audible at the lamphouse, and the bulb does not flash, replace the bulb
and attempt ignition with the new bulb.
Using the new bulb, if the high voltage arc is audible at the lamphouse, the flash of the bulb is
visible in the ammeter, and ignition is not sustained, the problem is in the power supply.
If the high voltage arc is not audible or the flash of the bulb visible, the trouble is in the igniter
or the igniter printed circuit board.
U80/021
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