Pioneer M-25 Betriebsanleitung - Seite 5

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Pioneer M-25 Betriebsanleitung

OPERATION

1. Set the preamplifier's controls as follows:
• Set the preamplifier's power switch to OFF.
• Set the volume control (attenuator) to the
lowest position.
• If your preamplifier has a tape monitor switch,
set it to SOURCE (or OFF). Only when playing
back a tape should it be set to ON.
2. Set the M-25 up as follows:
• Connect the power plug to the power outlet.
If you have connected the power plug to the
spare power outlet (SWITCHED: capacity of
800W or more) on the preamplifier, you will be
able to switch the preamplifier on and off by
operating the power switch on the M-25.
3. Beginning operation
• Set the power switches on the preamplifier and
M-25 to ON.
• Operate the preamplifier, turntable, tape deck or
tuner, and commence play.
• Adjust the volume and tone with the controls on
the preamplifier.

PROTECTIVE CIRCUITRY

• There will be no sound from the speakers for
between three and eight seconds after the M-25's
power switch has been thrown. This is because
the supply of power actuates the muting circuit
which is designed to eliminate noise when this
switch is thrown. In addition, the protective
circuitry is actuated to safeguard the speakers
from being damaged in the rare case that DC
components enter the output.
• If the sound suddenly stops coming from the
speakers during operation or if you hear the
built-in relays being continuously actuated
('click, click'), this may mean that there is a
speaker connection short-circuit or an overload
(if you are using speakers with an impedance of
less than 4 ohms). In such cases, the protective
circuitry is automatically actuated, and the
transistors and speakers are protected from
any damage. Once the trouble is corrected,
the protective circuitry will be automatically
released, and the M-25 will return to its normal
state of operation.