C
HAPTER
1. I
NTRODUCTION
1-17
02.9631.0010
CONFIDENTIAL
15 Jan 98
1.5
Principles of Operation
1.5.1 Operation
Overview
Operation of the luminaires is provided by software run within the
luminaire. The processing functions are primarily carried out on the
following three printed circuit boards (PCBs) located in the chassis card
cage assembly:
•
Lamp control board
•
Control interface board
•
Low voltage supply.
The voltage selector board (VSB) senses the incoming voltage and
automatically configures the power supplies for either 110 or 220 VAC.
Lamp power is provided by the arc power supply (APS). From the low
voltage supply board, the voltage is channeled to the main mechanical
subassemblies.
•
Brightness focus bulkhead.
•
Color filter bulkhead
•
Gobo/beam projector
•
Lamp focus assembly
•
Pan/tilt mechanism.
1.5.2 Operation
Description
1.5.2.1 Electronics
Components
Voltage Selector Board (VSB)
The voltage selector board senses the amplitude of the AC input power and
switches the transformer primaries in series (for 220 mode) or parallel (for
110 mode). When in 110 mode, the voltage selector board accepts an
incoming voltage of between 85 and 130 volts. When in 220 mode, the
voltage selector board accepts an incoming voltage of between 170 and
260 volts.
Transformer/Capacitor Assembly (XFMR)
This assembly provides unregulated DC power for use by the lamp power
supply assembly and low voltage supply board. Additionally, a DC-to-DC
converter PCB is connected to this assembly to provide an isolated voltage
for the fan drive plus PCB.
