McIntosh MC611, Руководство пользователя

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The power amplifier draws high current from the AC
power line. Therefore, it is important that they plug
directly into the wall outlet.
Also, most owners desire one power switch for the
whole audio system. The MC611 is equipped with a
circuit that provides remote Power Control from a Mc-
Intosh A/V Control Center. Refer to figure 26. When
the A/V Control Center is switched On, a (+5V) signal
operates the power relay in the MC611. The MC611
also has two remote Power Control Out Jacks. The
Power Control signal from these jacks are delayed by
a fraction of a second so that the turn on power surge
of the next power amplifier occurs at a later time.
This helps prevent power circuit overload that could
trip circuit breakers or blow fuses, a very important
feature in a high power Home Systems employing
multiple MC611 Power Amplifiers.
which is necessary for the wide dynamic range that
“Digital Audio” demands. Refer to figure 25.
Power Supply Circuits
To compliment the design of the MC611 Power Am-
plifier Circuitry, there is a high current high voltage
power supply. Refer to figures 23 and 26. The very
large Power Transfomer can supply over 13 amps of
current. Refer to figure 24 (golf ball is for size com-
parsion).
It is enclosed in the legendary McIntosh Potted En-
closures and weighs 28 lbs. The four super size main
filter capacitors can store over 140 Joules of energy
Technical Description, con’t
Figure 24
Figure 23
Block Diagram
of the
Power Supply
INRUSH
CURRENT
LIMITER
AC Power MAIN RELAYS
BACKUP
POWER SUPPLY
CONTROL
LOGIC
LIGHTING
CONTROL
POWER
CONTROL
FUSE
POWER
SWITCH
LOW VOLTAGE
SUPPLY
POWER
TRANSFORMER
MAIN
SUPPLY
AUTO
OFF
Figure 26
Figure 25