Security; Protection Mode; Mains Voltage Out Of Range - Nagra CLASSIC INT Manuel De L'utilisateur

SECURITY

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The CLASSIC INT is loaded with different protection systems to
allow for smooth and secure operation for the amplifier itself and
your loudspeakers.

Protection mode

When does the CLASSIC INT enter into « Protection mode »?
 Mains supply voltage is out of range
 Output continuous clipping
 Short-circuit across the output(s)
 DC component across the outputs
 Internal temperature is too high
What to do in this event ?
Turn the mains switch at the rear of the unit OFF (0), wait for 30
seconds then turn it ON (1) again.
Note: Should the CLASSIC INT go into Protection Mode without
any apparent reason or several times consecutively, turn the mains
switch OFF (0) and contact your Nagra dealer.

Mains voltage out of range

The CLASSIC INT power supply is designed to work for a specific
mains voltage, either 100-120 V or 220-240 V. To avoid potential
component destruction, it won't turn on if the mains voltage is not
correct. The front modulometer will turn red, and the unit won't
start. In such a case, please contact your Nagra dealer.
Whenever a potential danger arises for
the amplifier or the loudspeakers, the
CLASSIC INT will shut down. This is
called the « Protection Mode ». The
modulometer LEDs will light up red as
shown in the picture.
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NAGRA – CLASSIC INT