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NOTE: When working inside the lamphouse, enclose the xenon bulb in its protective
covering and/or wear protective clothing and face shield. Do not touch the quartz envelope of the
bulb with bare fingers.
ALLOW THE LAMPHOUSE to cool, with all blowers operating, for at least (20)
minutes before opening the access door.
Normal Operation:
When the switch in the main AC supply line to the xenon power supply is placed in the "ON"
position, with the door interlock switch closed, the lamphouse POWER light will glow and the lamp-
house blower(s) will operate. The top lamphouse blower will close the S4 air vane switch, and the
correct operation of the exhaust system will close the S5 air vane switch. These conditions complete
the circuit to the S2 LAMP "ON-OFF" switch.
Place the lamphouse MODE switch S3 in the "MAN." position. When the lamphouse LAMP
switch S2 is in the "ON" position, the elapsed time meter will operate and the AC circuit (5 - 6) to the
xenon power supply will energize the circuitry necessary to supply DC voltage to the igniter and bulb.
There will be an audible high voltage arc ping at the spark gap in the igniter and at the xenon
bulb. The bulb should ignite immediately after one or two of these high voltage pulses, and the lamp
current will adjust to the sustaining level set at the xenon power supply. An aged or "warm" xenon
bulb may require repeated ignition cycles.
Troubleshooting:
If the xenon bulb does not ignite, observe the following operational sequences for assistance in
locating and isolating the trouble area.
When operating with a xenon power supply equipped with the red indicator light, and the light
is "ON," the AC circuit in the power supply is trouble free up to the terminal block (L1, L2, L3) in the
power supply.
The blower(s) the lamphouse and the POWER light on the instrument panel should operate. If
this does not occur, the trouble is in either the door interlock switch, a blower motor, the indicator
lamp, a loose connection, a broken #2, #4, #7 or #8 lead, or a defective stepdown transformer in the
xenon power supply. The Ultra 80 has an in-line fuse in the 220 volt blower circuit; check the fuse and
replace if blown. Do not overfuse; use 3 A. slow blow.
TROUBLE CHART
U80/020
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