1-14
V
ARI
*L
ITE®
-
VL2B
AND
VL2C
S
POT
L
UMINAIRE
S
ERVICE
M
ANUAL
CONFIDENTIAL
02.9631.0010
15 Jan 98
1.3.2 Electronic
Chassis
Components
Figure
1-2
Ref. No.
Name
Function
1
Control
Interface Board
Controls stepper motors, system timing, pan/tilt, shaft encoder
interface, and sensor inputs.
2
Lamp Control
Board
Controls various luminaire functions, communicates with console
using modem board, and stores cue data using upgrade board.
3
Low Voltage
Supply Board
Regulates DC power Includes servo amplifiers for pan and tilt.
4
Motherboard
PCB Assembly
Located at bottom of card cage. Routes power to the luminaire
electrical components.
5
Electronics
Card Cage
Houses control electronics, cue memory, data communications
circuits, and power regulator PCBs. Motherboard is held on
bottom of card cage.
6
Voltage
Selector
Board
Senses amplitude of AC input power (86 to 130 or 170 to 260
VAC) and switches transformer primaries in series (220 mode)
or parallel (110 mode).
7
Input Panel
Contains hour meter, input connector and thumbwheel switch.
Thumbwheel sets luminaire's address.
8
Fan Drive
Plus Board
(VL2C Only)
Creates pseudo-sine wave for fan to increase fan speed rpm. Fan
runs at one speed at 60 Hz but runs slower at lower frequencies.
Board allows fan to run at higher speed without slowing down at
lower frequencies. Used only in VL2C luminaires.
9
DC-to-DC
Converter
Board (VL2C
Only)
Board provides isolated voltage to drive fan drive plus board.
Voltage for fan drive plus board cannot be referenced to digital
ground. DC-to-DC board is installed over transformer
capacitors. Used only in VL2C luminaires.
10
Transformer
Assembly
Provides unregulated DC power from AC input for use by lamp
power supply assembly and low voltage supply PCB assembly.
11
Arc Power
Supply
Provides AC power for lamp. VL2B luminaire arc power supply
operates at 400 watts. VL2C luminaire arc power supply
operates at 600 watts
Pan Mechanism
(Chassis Lid)
Drives belt-driven pulley to pan luminaire head. Interconnected
to motherboard for power and data.
Cooling Fan
(Chassis Lid)
Forces cooling air though hollow yoke arms to lamp. Blows air
directly across lamp for maximum cooling. Runs at higher rpm
when used in conjunction with fan drive plus board modification
used on VL2C luminaires.