AYRE MX-R - Manual (Page 16)

Rail Fuses
Internal power supply fuses protect both the loudspeakers from
excessive current and the amplifier from short-circuits. If one of
these fuses blows, the amplifier will not operate and the status
LED will flash red.
If the amplifier is linked to an AyreLink-equipped preamplifier
with an alpha-numeric display, a message indicating that the
amplifier has a blown fuse will be displayed on the front panel
of the preamplifier.
The amplifier must be disconnected from the system (including
AC power) to replace the fuse.
Do not remove the amplifier cover. Hazardous
voltages may exist inside the unit. Please refer
fuse replacement to a qualified service technician.
AC Line Voltage
If the AC line voltage drops below 75% of normal (brown-out),
the status LED will glow violet and the unit will not operate.
If the amplifier is linked to an AyreLink-equipped preamplifier
with an alpha-numeric display, a message indicating that a low
AC line voltage condition exists will be displayed on the front
panel of the preamplifier.
When the AC line voltage returns to normal, the unit will
revert to the green “Standby” mode. Press the front-panel
button to return the unit to the blue “Operate” mode.
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