Amplifier Protection; Troubleshooting - Ashly mXa-1502 Operating Manual

mXa-1502 • Operating Manual
to the mXa-1502 Euroblock VCA pins V+, 1, 2, or
3, and ground, then associated in software with
a VCA Gain block placed anywhere in the signal
chain.
If using a potentiometer other than the WR-1,
use 10k Ohm and wire the mXa V+ pin to the
potentiometer's clockwise terminal, GND to the
counter-clockwise terminal, and VCA pin 1-3
to the wiper. Do not connect the WR-1 ground
connection to any external grounds.
WR-1.5
The WR-1.5 offers
a single rotary
potentiometer for DC
level control, plus with
a four-position rotary
switch for triggering
events using mXa-
1502 trigger inputs.
WR-2 Event
Trigger Switches
The WR-2 lockout
push-button remote
can trigger up to four
different events that
have been programmed
into the mXa-1502.
Each pushbutton switch
gets connected to a
trigger input pin. When
a switch is pressed,
it triggers the event
programmed for that
trigger input.
8

Amplifier Protection

Over Current Protection - When the output
current exceeds the amplifier's safe operating
limits. This occurs in the amplifier output stage.
Thermal Protection - The amplifier senses out-
put device temperature and adjusts fan speed
to keep the operating temperature within ac-
ceptable limits. If device temperatures exceed
that limit, the input level to that channel is first
reduced, and as a last resort the power supply
will be switched off.
Mains Protection – Protection within the
power supply includes:
• In-rush Current Limitation during power up
• Mains Over Voltage Detection
• Internal Mains Fuse Protection
To protect the Mains fuse against AC
overcurrent due to excessive audio output
current, there is a protection scheme indicated
on the front panel which reduces audio output
level until the overcurrent condition is no longer
present.
DC Output Protection – If the amplifier senses
DC on an output it shuts down the power
supply.
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Troubleshooting

No AC Power
• Is the detachable AC power cord properly
installed? Is it plugged into a known live
outlet?
• Has the power switch been disabled?
No Amplifier Output
• Is the amplifier on, indicated by the
illuminated front panel power button?
• Is the amplifier in protect or standby mode?
• Is the input signal properly wired to either a
mic/line input or RCA line input?
• Are remote control or software level controls
turned down?
• Is the signal muted from DSP, remote
control, mixer, or a triggered/scheduled
event?
• Are dynamics or gain tool settings in
the signal chain allowing signal to pass
properly?
• Is signal routed to the correct output
channel in the mixer matrix?
• Are level controls set properly in the mixer?
• Has a scheduled or triggered event changed
settings?
Still Not Working?
• Contact Ashly technical support at 1-800-
872-0010 x124, or email service@ashly.com
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