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VERY LITTLE MAINTENANCE is required to keep this power supply in good operating condition.
most lighting equipment, cleaning is the most important element.
adjustments or performing service procedures. Allow several
1. Remove all accumulated dust and dirt from the rectifier.
certain all air inlets and outlets are unobstructed.
2. Check all electrical connections for tightness.
connections or terminals.
3. Apply a drop or two of SAE 20-weight oil to the squirrelcage blower motor bearings. It is neces-
sary to dismount the blowers from the chassis plate to access the oil holes.
POWER LINE PROBLEMS
PRIMARY POWER (AC source) problems are most commonly (a) complete loss of AC power, or (b)
phase loss, in which one phase loses power.
a ) Check line safety switch ("ON").
measure input power at contactor terminals L1, L2, L3.
b ) When power is lost on one phase, the current ripple will increase and trip the AC line circuit
breaker (where supplied). To detect a lost phase, measure
contactor input terminals L1, L2, and L3.
PROBLEMS of this nature, once detected, are generally corrected at the power connection, or in the
generator unit.
BOOST CIRCUIT PROBLEMS
THE BOOST CIRCUIT generates the high open circuit ("no load") DC voltage which, in conjunction
with the igniter pulse, will ignite the xenon bulb.
110 V.DC.
A TERTIARY WINDING on the main transformer (T1) supplies the source for the Boost Circuit.
derive from the T1 transformer; two are single conductors, and the third is a soldered pair. The Boost
Circuit should be connected only to the (2) single conductors.
energy and also contribute to bulb ignition.
CONTROL CIRCUITRY
THE MAIN POWER TRANSFORMER is energized by contactor K1, which is pulled by manual
of the lamphead "ON" switch.
must also be closed to complete the contactor circuit.
POWER SUPPLY MAINTENANCE
Turn off ALL primary AC power before making any
minutes for the capacitors to drain stored energy.
Allow the power supply to cool to ambient temperature.
POWER SUPPLY TROUBLESHOOTING
WARNING: Exercise extreme caution when
taking voltage measurements in a power
"ON" condition.
minutes to discharge.
Check fuses or breakers insupply line.
All lamphouse interlock switches (air pressure & thermal overload)
WARNING
Vacuum the heat sinks. Make
Clean, retighten, or replace any discolored
Allow the capacitors (2)
the AC voltage phase-to-phase at
The open circuit voltage should measure at least
Filter capacitors C1A & C1B store
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Using an AC voltmeter,
Three wires
actuation
15
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