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NORMAL OPERATION
WHEN THE SWITCH in the main AC supply line to the xenon power supply is in the ON
position, and the 30 A. circuit breaker on the switching power supply is ON, the VIN light on the xenon
power supply, and the lamphouse instrument panel POWER and AIR lights will glow. The cooling blowers
in the lamphouse and in the power supply will operate. When all lamphouse covers are secured,the magnetic
interlock switches will close and the PANELS light on the control panel will glow.
WHEN THE CONTROL PANEL LAMP SWITCH is placed in the ON position, the AC
c ontrol circuit in the lamphouse will energize the xenon power supply circuitry providing DC current to the
igniter and bulb. The green "GO" light on the xenon power supply and the LAMP light on the lamphouse
control panel indicate a completed circuit.
THERE WILL BE a distinctly audible high voltage arc ping at the i gniter arc gap and across
the bulb electrodes. The bulb should ignite immediately after one or two of these high voltage pulses, and the
lamp current will adjust to the output setting of the xenon power supply. Multiple ignition pulses prior to bulb
ignition normally indicate a low DC output setting. Increase output to the bulb's initial ("nominal") current
setting; see xenon power supply manual. A "warm" or aged xenon bulb might also require multiple strikes.
TROUBLE SHOOTING
IF THE XENON BULB does not ignite, observe the following operational sequences for
assistance in locating and isolating the trouble area.
WHEN THE FANS and the VIN indicator light on the power supply are on, the circuit in the
power supply is trouble-free up to the terminal block in the power supply. At this time, the spotlight blowers
should operate. If this does not occur, the trouble is in one of the blower motors, a loose connection, or a
broken #7 or #8 lead (220 V.AC). Check at this time for 220 V.AC blower voltage at wires 7 & 8, and 220
V.AC at the lamphouse quick-disconnect pins I & J. CAUTION: exercise extreme caution when taking
voltage measurements in a power "on" condition.
IF THE HIGH VOLTAGE PING or the ignition flash is not a pparent, check voltages on the
terminal board adjacent to the shunt. A reading of 120-170 V.DC "no load" should be measured between
wires 6 and 7, and 115 V.AC between wires 9 and 10. If these voltages are not indicated, the problem is in the
leads be t ween the lamp h ouse and power supply, or in the power supply boost circuit. See the trouble shooting
section of the power supply manual for additional instructions.
THE SWITCHING-TYPE XENON POWER SUPPLY furnished with the spotlight system
includes thermal overload switches and protection circuits to prevent damage resulting from high or low input
voltage. Loss of DC open circuit voltage, or an interruption of DC sustaining current, may be traced to these
circuits. See the power supply manual.
IF THE HIGH VOLTAGE ARC is audible at the lamphouse and the bulb does not flash, check
for a lamphouse DC lead arcing to ground. If no ground fault is detected, replace the bulb and attempt ignition
with the new bulb.
TROUBLE CHART
XG4/018
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