Remote Turn-On Tip Polarity - Mark Levinson N 331 Operating Manual

Remote turn-on
tip polarity
18
In addition, should a fault condition cause any amplifier's protection cir-
cuitry to activate, it can report the nature of the problem to a linked Mark
Levinson preamplifier via this communications link. If this occurs, the
preamplifier will display the number of the amplifier at fault (AMP1 being
the first amplifier in the daisy chain, AMP2 being the second amplifier, and
so on). The preamplifier will also indicate the nature of the fault condition
with one of the following codes:
Code
HOT!
DCO!
If upon first connecting your Link cables the system does not automatically
toggle the amplifiers from the preamp, you may have to cycle power (not
standby , but actual AC power) once to alert the system as to the presence
of the newly-established Links.
4 REMOTE TURN-ON INPUTS
Additional remote turn-on jacks provide compatibility with a wide range of
products, to facilitate remote turn-on and turn-off in systems which do not
include a Mark Levinson 30-series preamplifier (which would normally use
the Mark Levinson Communications Link described above). These
mm) "mini-jacks" allow other components to bring the power amplifier in
and out of
standby
ing" of multiple amplifiers.
If this method of control is used for the amplifier(s), the last mini-jack in
the chain must be terminated with a dummy
plug must be inserted into the final
single amplifier is controlled in this fashion, the "extra" mini-jack must be
terminated.
If you are not using these turn-on inputs, you may leave them both empty
of any plugs.
This remote "trigger" input will be operated by a 3–12 volts DC positive-
polarity pulse, of at least 100 milliseconds duration, with tip polarity as
shown below:
Receiving such a pulse will cause the amplifier to "toggle" between
and operate , much like pressing the front panel
long-term DC signal (more than one second) will force the amplifier into
the fully condition (as does a prolonged press of the front panel but-
off
ton.) Y our Mark Levinson dealer can help you take advantage of these de-
sign features to maximize your system's versatility .
Fault Condition
thermal shutdown
uncorrectable DC offset
. Two such mini-jacks are provided to allow "daisy-chain-
1 ⁄ " (3.5 mm) jack]. Even if only a
8
– +
3-12 volts for at
least 100 mS
1 ⁄ " (3.5
8
1 ⁄ " plug [that is, an empty
8
standby
standby button. Sending a