T+A AMP 8, Руководство пользователя

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21
Basic Functions of
the AMP 8
The basic functions of the
AMP 8 , described in this chapter are always available, regardless of
the selected source.
Power-on
After power-on it will last some time until all amplifier stages have
reached their correct operating points. During this time the SPEAKER-
LED will blink (Power-On Delay). As soon as the
AMP 8 is ready to use
the loudspeaker outputs will be switched ON and the SPEAKER LED will
light constantly.
Automatic ON/OFF in combination with DAC 8
In combination with a DAC 8 the AMP 8 is automatically switched ON
and OFF via the CTRL connection.
Automatic ON/OFF controlled by audio signal
The AMP 8 is equipped with an automatic Power On circuit. When an
audio signal is applied to its inputs the AMP 8 will automatically be
switched ON. After the music signal has stopped for a period of about 20
minutes the AMP 8 will be automatically powered down.
ON/OFF controlled by external trigger voltage
If the AMP 8 is combined with a source device providing a trigger control
voltage (+5…+20VDC) it can be automatically switched ON and OFF by
this device. For details of connection please see page 34.

Using the CTRL connection in conjunction with a DAC 8 or the trigger-
ON voltage avoids switch-ON delays and the possibility of unintentional
switching off in longer music pauses.
Protection
The
AMP 8
is equipped with a microprocessor controlled protection
circuit offering perfect protection against any kind of overload by
comparing the input and output signals and by switching OFF the
speaker outputs if any deviations occur. The loudspeakers connected to
the
AMP 8 are effectively protected against any kind of damage by
clipping or other signal deforming errors. Additionally protection circuits
against short circuits and overheating are provided.
In case of an overload, overtemperature or any other malfunction the
speakers are switched OFF immediately and the SPEAKER LED starts
blinking. In this case please reduce the volume. After about 20 seconds
the
AMP 8 should switch ON again.
If the speakers are not switched ON again possibly a short circuit exists
in the speaker leads or the
AMP 8 has become too hot.
The AMP 8 should be switched OFF in this case for about 10 minutes to
allow it to cool down. Please also verify that there are no short circuits in
the speaker leads or at the speaker terminals.