Electrical System & Components; Input Processing; Projector Cooling - Christie CP2210 Service Manual

the lamp OFF. It is extremely important to pay attention to the warnings and status of the projector to prevent
permanent damage. For complete details, refer to
1.3.4 Electrical System & Components
The overall electrical system includes subsystems for input processing, control, cooling and power.

Input Processing

Sources: Incoming source data determines the continuous ON/OFF states of the DMD pixels. The CP2210
accepts two SMPTE 292M digital video inputs intended for the DLP Cinema
for DCI compatibility. These serial digital signals are generated from a server or a decoder box (e.g., QuBit,
Avica, EVS). Other "non-cinema" or "alternative" signal types connect to a DVI-D port. Sources connect to
the input panel located on the right-side of the projector. For details about connecting sources, refer to the
CP2210 User Manual (P/N: 020-100410-xx).
Cardcage Electronics: The cardcage contains all main processing PCBs: the PIB, ICP, link decrypter,
backplane and LEQD. Four fans are responsible for cooling the electronics by blowing air across them.
Light Engine with Five-Element Prism: The light engine is the essence of the imagining system. All
processing is done in the digital domain, controlling the position of the DMD mirrors as ON/OFF in response
to the incoming signal. Contrast and brightness (black level) are preset for DLP Cinema
cannot be adjusted. Service access to the projector requires keyed entry-with the proper panels removed, and
all convergence adjustment screws can be accessed from the top and operator's side.
Color Calibration: As part of every installation, the projector's color processing is calibrated to achieve the
required proprietary digital cinema color performance standards-called Target Color Gamut Data (TCGD).
This calibration procedure takes into account the various environmental factors; such as type of port window,
screen, ambient light, etc., and must be repeated if there is a change in any of these variables.
Lamp Power Supply (LPS) Interface Signals: The 15-pin connector on the LPS end splits into three separate
harnesses that go to the backplane, fire alarm interlock (hard-wired) and the lamp door interlock (hard-wired).
This connector links the LPS controls to the rest of the projector. The LPS-to-backplane connection carries
RS232 (serial) control signals for "lamp enable" and LPS output power adjustment, while allowing the
projector to continuously monitor LPS operation. There are two hard-wired LPS interlocks, one for the lamp
door and another for the fire alarm. The fire alarm interlock can be connected, if desired, to the theatre's fire
alarm system—this would then shut the lamp OFF in the event of a fire and is a safety requirement in certain
countries. For sites in which the fourth interlock is not used, it is generally shorted to ground. The LPS
communication/control cables each route into a single 15-pin connector. For details, refer to
Interconnections.

1.3.5 Projector Cooling

The projector uses fans throughout to cope with the significant amount of heat generated by the lamp and other
electrical components. These fans turn ON when the projector is powered ON and OFF only after the projector
has cooled down - even after the power is turned OFF. Built-in fans run at all times to cool the Low Voltage
Power Supply (LVPS). The lamp is cooled by two DC blower fans; one for the anode and another for the
cathode. The lamp cooling air flows from right-to-left across the projector and is unfiltered. The light engine is
cooled by filtered air entering the front of the projector. This air passes through a 90mm fan attached to the side
of the light engine mount, passes over the light engine (cooling the prism, light dump and (3) DMD heatsinks),
exits the light engine mount at the bottom left-side, and exhausts out of the side of the projector. The cardcage
is cooled by filtered air entering the front of the projector. Four axial 90mm fans provide this airflow. The air
cools the cardcage front to back; with the heated exhaust air flowing into the lamp compartment.
CP2210 Service Manual
020-100556-04 Rev. 1 (01-2012)
Section 6 Interconnections.
Section 1: Introduction
inputs configured as dual-link
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presentations and
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Section 6
1-7