Dolby Laboratories CP650, Руководство по установке

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Dolby
®
Model CP650 Installation Manual
2-1
Chapter 2
Installation
Do not connect the CP650 to mains power until all other connections have been
made.
If air-conditioning noise is audible in the theatre, arrange for lubrication of the motor
and fan bearings, adjustment of belts and drives, and cleaning of filters to reduce the
ambient noise to a minimum. If the air-conditioning cannot be repaired, switch it off
while the CP650 is being aligned.
2.1 Replacing an Existing Sound System
If the CP650 replaces an existing cinema sound system, play a typical film before you
remove the old system so you will have a benchmark for comparison to the new
system.
2.1.1 Before Playing the Film:
•
Verify that the existing power amplifiers are in good working order.
•
Verify that the existing speakers are in good working order, and that there are no
loose or missing pieces, structural parts, or damaged drivers in the enclosures.
•
Verify that all wiring is present and properly connected, and that crossovers are
operating and are correctly adjusted.
•
Check the polarity of the speaker connections.
•
Verify that there are adequate ground (earth) connections.
•
Verify that radio interference problems are adequately resolved.
2.1.2 While Playing the Film:
While running the film, listen carefully in various parts of the theatre for audio
system problems, including:
•
Hum
•
Noise, clicks, or pops
•
Distorted sound
•
Poor tonal balance (lack of high-frequency or bass content)
These problems must be resolved before the installation process can proceed.