C
HAPTER
1. I
NTRODUCTION
1-19
02.9631.0010
CONFIDENTIAL
15 Jan 98
1.5.2.2 Bulkhead
Assemblies
Yoke Cable Assembly and Yoke Termination Board
Located in the luminaire head, the yoke termination PCB connects to the
yoke cables via one 26-pin and one 24-pin connector. The luminaire power
is routed to the yoke termination PCB and then routed to the head
electrical assemblies.
Ignitor Board Assembly (IGN2)
The ignitor PCB assembly is mounted remotely from the arc power supply,
inside the luminaire head. The power supply is interconnected through the
yoke cable assembly via high voltage cables. An ignitor PCB circuit
generates up to 3300 VDC, which is applied to the spark gap. When the
2.5 kV spark gap fires, the pulse is stepped-up to 16 kV and the start pulse
is applied to the arc lamp.
Brightness/Focus Bulkhead (BFB)
The brightness/focus bulkhead is a dual-purpose bulkhead. It contains a
brightness iris that is used to dim the apparent brightness of the projected
light beam from the luminaire. The bulkhead also contains the focus tube
and lens.
Color Filter Bulkhead (CFB)
The color filter bulkhead contains the two dichro-color wheels that enable
color projection and changes.
Gobo/Beam Projector (GBP)
This assembly maintains two functions: gobos and beam projection. The
gobo mechanism contains a single wheel containing up to 10 gobos
(typicaly 9 gobos plus one open white location). The beam projection
mechanism is a wire-belted, leafed, iris shutter operated by a single stepper
motor.
Lamp Focus Assembly (LFA)
The lamp assembly contains the lamp and the lamp alignment controls. The
knurled knob alignment controls aid in the redirection of the lamp in the X,
Y, and Z planes.
Pan/Tilt Mechanism (PTM)
The pan/tilt mechanism is used to drive the pulleys that cause the luminaire
head to pan and tilt. The same assembly is used for both pan and tilt
applications.
