TM 5-3610-285-14
f. Power Supply Circuit. Provides 3000 watts of power to the exposure lamp. It is comprised of the following
components:
(1)
Autoformer (XT1). A step up/down transformer used to supply power to the strike transformers and the
3kW power supply circuit board. Receives power via contacts C1 and C2 of the autoformer relay (K2).
(2)
Power Factor Capacitors (C1-C4). Provide for filtering and stabilization of input power to autoformer.
(3)
3kW Power Supply Circuit Board. Receives power from autoformer. Monitors input line voltage and will
shut down if input power is too high or too low. Contains circuits for detecting phasing and generating trigger pulses.
These trigger pulses are used in the high voltage strike pulse generator circuits. The high voltage strike pulse generator
circuits apply high voltage pulses to the strike transformers. Four LEDs on circuit board indicate operation. Two fuses
provide circuit protection.
(4)
Strike Transformers (ST-1 and ST-2). Generate the 3000 watts used by the metal halide exposure lamp.
The secondary sides of the transformers are wired to input power and to the exposure lamp. The primary sides are wired
directly into the 3kW power supply circuit board.
Section II. OPERATING INSTRUCTIONS
2-4. DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS.
2-10
