Dolby CP750 Digital Cinema Processor Manual - Projectionniste.net

Mounting the CP750
Higher‐priced units incorporating active circuitry are also available. These offer additional
features such as multiple inputs, inputs for optical connections, and multiple outputs.
2.3 Mounting the CP750
To avoid heat or hum pickup problems, do not mount the CP750 immediately above or
below power amplifiers. Locate power amplifiers away from the CP750 to avoid hum
pickup problems. Always leave a 1‐U space (43 mm, or 1.75 in) above and below the CP750
to provide adequate ventilation. Install an air guide or baffle to deflect hot any air coming
from equipment below the CP750.
To ensure good ground contact, install a star washer on at least one (and preferably all)
rack‐mounting screws as shown in Figure 2‐1. This will also aid in the prevention of
electrical noise problems.
Figure 2‐1
Figure 2-1
Star Washers and Rack-Mounting Screws
Proper shielding and termination of cables and cable assemblies are also very important.
Follow the methods shown in the wiring diagrams.
2.4 Connections
To connect the CP750 to your auditorium equipment, refer to Figure 2‐2 .
For proper operation in locations where there is considerable interference, strictly adhere
to the cable types, lengths, and pin assignments. Shields must connect only to the chassis
and should not be paralleled with the negative side of inputs or outputs.
Connector pinouts are listed in Section 7.2.
2.5 Fuse Information
The CP750 uses a universal‐switching power supply that handles the full range of nominal
mains voltages between 100 and 240 VAC, and any frequency between 50 and 60 Hz. If a
power supply fuse blows, do not attempt to replace it. Instead, contact Dolby Laboratories.
Dolby ® CP750 Digital Cinema Processor Manual 13