Fan Cooling; Liquid Cooling; Power - Christie CP2210 Service Manual

Section 1: Introduction

Fan Cooling

Fan speed is controlled through temperature sensors, which measure inlet air temperature (ambient), lamp
exhaust air temperature and light engine temperature. These sensors allow fan speed to be adjusted according
to a calculated cooling demand determined by the sensors. The fan speed is adjusted using a Pulse-Width-Mod-
ulated (PWM) signal from the backplane. All fans are +12VDC fans.
• Lamp (Fans 1 and 2): Two DC blower fans; one for the anode and the other for the cathode are used to cool
the lamp. If necessary, a spare fan is available to cool the reflector. The unfiltered lamp cooling air flows
from right-to-left across the projector.
• Light Engine (Fan 8): The light engine is cooled by filtered air entering the front of the projector. This air
passes through (2) 90mm fans attached to the side and (1) 90mm fan under the light engine mount, passes
over the light engine from right-to-left (cooling the prism, light dump and the DMD heatsinks), exits the light
engine mount at the bottom left side, and exhausts out of the side of the projector. If necessary, a spare fan is
available to provide additional cooling to the light engine.
• Cardcage (Fans 6, 7, 10 and 11): Two axial 90mm fans are used to filter air entering the front of the
projector in order to cool the cardcage. The air cools the cardcage front to back; with the heated exhaust air
flowing into the lamp compartment.

Liquid Cooling

The liquid cooling system is the primary method for cooling the light engine DMDs. This system consists of
small water blocks screwed to the three DMD mounting studs and daisy chained together with UV-resistant
Tygon flexible tubing. Both ends of the chain connect to two quick-release shutoff connectors, forming the
cool "source" and warm "return" lines with the adjacent liquid cooler heat exchanger and pump. This liquid
cooling loop circulates Christie approved coolant - JEFFCOOL E105. The level of fluid in the reservoir can
only be seen if the projector top lid is opened.

1.3.6 Power

specified on the license label on the back of the projector. Always turn the projector off
before you unplug the AC power cord. Wait 15 minutes for the main exhaust fan to turn OFF
and for the lamp to cool before you unplug the projector.
Power remains available to the projector even after lamp shutdown
(STANDBY mode) to enable on-line monitoring and software
upgrades to be performed. The projector is powered by 200-240VAC
power from the theater. The switching Lamp Power Supply (LPS)
provides a well regulated DC current up to 85 amps with a maximum
LPS power of 2.1kW. The power output from the LPS is controlled
by the PCM, via a dedicated 'RS232' connection from the backplane
to the LPS. A switch selectable secondary 100-240VAC inlet is
provided, allowing the main electronics to be powered separately, via
a universal 100-240VAC UPS. The main LPS is powered through the
main 200-240VAC inlet. A discrete AC switch above the two inlets
(Figure 1-2) allows the user to select whether the main electronics
are powered from the main inlet - A only - (requiring only one power
cord to supply the entire unit), or the secondary inlet supplied by the
UPS - A+B -, via an additional power cord (not provided).
1-8
DO NOT attempt operation if the AC supply is not within the voltage range
Figure 1-2 AC Receptacle
CP2210 Service Manual
020-100556-04 Rev. 1 (01-2012)