Installation manual

Dolby

Model CP650 Troubleshooting Chart Maintenance and Troubleshooting

9-14

Symptom Probable Cause Recommended Action

The sound from two or more channels is

distorted and you can hear the distortion

through the booth monitor at normal

listening level.

Malfunctioning two-channel power amplifier.

If two distorted channels are served by the same two-

channel amplifier, the problem may be in the amplifier. See

the manufacturer's instructions.

Call service engineer.

When a stereo film is projected, the sound

appears to be coming from the wrong

speakers.

The A-chain has become misaligned.

Check Dolby level calibration.

Call service engineer.

Sound from the front (screen) channels is

leaking into the surround channel.

The A-chain has become misaligned.

Surround sound delay set improperly.

Surround sound level set too high.

Call service engineer.

You hear an echo in a small theatre. Surround sound delay set improperly. Call service engineer.

The sound level in bypass is higher or

lower than the normal sound level.

Adjust with the front-panel knob, since other parts of the

system may be malfunctioning.

Call service engineer.