Lamploc Module; Lamp Reflectors; Lenses; Primary Lenses - Christie CP4230 Service Manual

Section 1: Introduction
end of the lamp protruding beyond this yoke conducts current from the igniter. Good contact between this
clamping collar and the anode end of the lamp is essential for lamp ignition and performance, thus the
materials and design resist deformation caused by the high voltages. With the simple yoke support at the front,
the rear of the bulb is free to move up-and-down (Y-axis adjustment), side-to-side (X-axis adjustment) and
forward-or-backward (Z-axis adjustment) within the necessary ranges for optimized lamp position. These
motorized movements are controlled at the TPC using the LampLOC
Setup>LampLOC Setup window. Generally, the Do Auto positioning is adequate for all installations.
Alternatively, arrow buttons on this same page can be used to move the lamp manually along each axis.
1.5.1 LampLOC ™ Module
The electro-mechanical LampLOC
optimize the lamp position relative to the reflector. With the lamp "aimed" properly, the greatest amount of
light will be collected by the reflectors and used in the optical system. All adjustments are motorized using
three stepper motors on the LampLOC
(IMCB) under command of TPC software. Feedback from the Light Sensor Module indicates where the light
output is maximized, terminating the lamp movement. In case of an electronics failure, the motors can be
controlled manually with thumbwheels (service technician required, as the rear panel of the projection head
must be removed).

1.5.2 Lamp Reflectors

A pair of glass reflectors-elliptical (rear) and spherical (front)-work together to efficiently collect the lamp light
output and direct it to the optics in the projector. Each reflector mounts to a single common cast and machined
mounting plate using four stainless steel spring clips that minimize stress points. Reflector shapes and coatings
are optimized for maximum brightness. A spun aluminum shield in the same basic shape as the rear reflector is
mounted coaxially with it, essentially covering the outside surface of the reflector and providing a consistent
gap for air flow. High temperature black paint on the inside of the shield absorbs the IR and UV light passed
through by the reflector. Holes in the reflector mount allow cooling air to pass through to the inside of the front
reflector and on to the lamp anode.
1.6

Lenses

1.6.1 Primary Lenses

A primary lens inserts into the lens mount and is secured with a simple locking lever. It is important to
remember that a primary lens seals the projector. If the lens is missing when power is supplied to the unit,
unfiltered air will be drawn in through the lens opening and into the front area of the projection head,
potentially depositing dust and dirt on components in the light engine and optics. The attachment of the three-
plate lens mount is offset by jack screws spaced as far apart as possible to provide solid leverage and accurate
adjustment of boresight. Good boresight ensures alignment of the primary lens to the light engine and prism.
Refer to the CP4230 User Manual (P/N: 020-100621-xx) for all other primary lens installation details, the
boresight adjustment procedure at the screen, and lens specifications.

1.6.2 Motorized Auxiliary Lens Mount (MALM)

The MALM assembly is an optional hardware component, which is used to switch from flat to "scope"
formats. This assembly is secured to the projector base and supports either a 1.25x anamorphic lens or a 1.26x
1-6
module (a.k.a. lamp adjuster) adjusts the lamp along three axes to
™
module controlled by the nearby Integrated Motor Control Board
™
Never apply power to the projector unless the primary lens is installed.
Do Auto feature in the Advanced
™
CP4230 Service Manual
020-100622-04 Rev. 1 (05-2016)