How To Operate - McIntosh Power Amplifier MC303 Owner's Manual

How to Operate

Power On
To have the MC303 automatically turn On or Off when an
A/V Control Center or Preamplifier turns on or off, rotate
the power switch to the REMOTE
position. For manual operation,
rotate the power switch to the ON
or OFF position as desired. Refer
to figure 8.
Note: There must be a power con-
trol connection between the
MC303 and the A/V Control
Center or Preamplifier, in
order for the remote power
turn-on to function.
Meters
Rotate the METER LIGHTS Switch to select the Meter Il-
lumination Mode you desire. Refer to figure 9.
OFF - Meter Illumination
is switched OFF and
the meters will con-
tinue to indicate the
power output.
AUTO - Meter Illumination
is switched ON.
When Power Control
Input of the MC303
is connected to an
A/V Control Center
or Preamplifier with
Remote Meter Illumination Control, the Meter
Illumination will automatically be remotely
controlled (On/Off).
The MC303 Meters respond to all the musical informa-
tion being produced by the three Power Amplifier Circuits.
Refer to figure 10. They indicate to an accuracy of at least
95% of the power output with only a single cycle of a
2000Hz tone burst.
Figure 8
Figure 9
Figure 10
Power Guard
During normal operation, the Front Panel Power Guard
Indicators will momentarily illuminate during peaks in the
audio signals. Refer to figure 11. In
the event the MC303 overheats, due
to improper ventilation and/or high
ambient temperature, the internal
protection circuits will activate. The
Front Panel Power Guard Indicators
will continuously illuminate and the audio will be muted.
When the MC303 has returned to a safe operating tem-
perature, normal operation will resume.
How to Operate
Figure 11
11