CAUTION
XR Series power supplies are factory wired for a specific input voltage. Do not connect the ship’s power
to the Power Supply until a qualified technician determines that the ship’s voltage to
be connected to the Power Supply is the same as that for which the Power Supply can
accommodate. It may be necessary to reposition transformer jumpers at the time of
installation to match the Power Supply with the ship’s voltage.
The function of the Power Supply is to convert the ship’s alternating current to direct current required by
the xenon lamp for proper operation. The lamp requires approximately 20 volts at approximately 20 to 25
amperes DC. The Power Supply also provides power to the high voltage and boost circuits necessary to
ignite the xenon lamp and to sustain its operation.
The Power Supply is a 20 VDC, 25 amp Power Supply operated on appropriate ship’s power. The Power
Supply is mounted in a cabinet suitable for bulkhead mounting and with ample access space for cable
connections. The standard (110 VAC) and optional (220 VAC) power supplies cannot be field adjusted to
subsitute for each other and must be operated at their intended ship’s supply voltage.
d. Controls.
There are two control systems which perform different functions. The electrical control sys-
tem controls the power to the searchlight while the mechanical directional control system controls the
azimuth (horizontal) and elevation (vertical) movement of the searchlight head. These systems are
described as follows:
(1) Electrical Controls
. Remote Control Panel STANDBY/ON/IGNITE Switch (Figure 2-1) - the
“STANDBY” position removes power from the lamp circuit. This is essentially an “OFF” position. The “ON”
position energizes the ignition circuit and automatically starts the lamp operation. In addition, the “ON”
position maintains power to the lamp so that operation is sustained. If this position fails to start the lamp,
position the switch to the “IGNITE” position until the lamp is observed to be operating and then release
pressure on the spring-loaded switch. The remote ammeter will also indicate the lamp is operating by
showing 20 - 25 amperes of current flow. To turn the lamp “OFF”, position switch into the “STANDBY”
position.
NOTE
Should the lamp fail to ignite in the “ON” (or “IGNITE” positions after approximately ten seconds)
or
should it fail to sustain operation after initial ignition, the lamp may be faulty.
Beam Focus Switch - This switch applies power to an electric motor which drives the focus mechanism.
Holding the BEAM switch engaged continuously will cycle the focus mechanism continuously from the
compact mode to the spread mode. The BEAM switch should be held in position until the desired beam
pattern is obtained. Small adjustments may be obtained by momentarily engaging the beam focus switch.
NOTE
The beam pattern size may be changed (within limits) independent of the focus mechanism
by making an adjustment within the searchlight head. This adjustment should be made
ONLY by qualified and trained service personnel. Refer to paragraph 3-3.
A green power indicator light is provided on the control panel to indicate that power is applied to the elec-
trical system.
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