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Front panel indicators
e front panel Zone Status LEDs indicate the status of each of the
amplier zones:
• Red - standby
• Amber - zone muted
• Green - zone on
• Flashing Red - over temperature
RS232 remote control
e Arcam MZ ampliers may be remote controlled using an RS232
data connection. e communication protocol is described from page 13
onwards. e following functions are available:
• Zone mute on/o
• Power/Standby
• Query zone status (mute, temperature)
12V Trigger Input
If a 12V trigger output is provided by any of the pre-amps connected to
the MZ amplier, it can be connected to the 12V trigger in socket using a
3.5mm jack (shown below).
is enables the MZ amplier to be powered on or o remotely from a
pre-amp.
Note that the main power switch on the front panel must be depressed
to allow the MZ amplier to be switched in and out of standby using this
method.
Troubleshooting
If you are having trouble with your amplier, check the following items:
No sound
Check the following:
• Both the source component (pre-amp) and MZ amplier are
switched on, indicated by the front panel LED being lit green on the
MZ amplier.
• e MZ amplier is not in standby, indicated by the front panel LED
being lit red.
• e source component (pre-amp) is not muted.
• e MZ amplier is not muted, indicated by the front panel LED
being lit amber.
Sound cuts-out unexpectedly
or suddenly becomes poor or distorted:
If the temperature of the internal heatsink rises above a safe level, then
a thermal cut-out inside the amplier will operate. During this time
the front panel LED will ash red and the amplier protection system
temporarily removes the power to the speakers. e system will reset
itself as the heatsink cools down.
• With low-impedance speakers connected (6 or less), overloads are
more likely.
• Overloading the amplier may cause it to shut down because of
overheating.
Screen = Ground
Tip = +12V trigger signal
3.5mm jack - trigger connections
11


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