User`s guide
Matrix Switcher 63249-420-266A2
User's Guide 06/2010
16
© 2010 Schneider Electric. All Rights Reserved.
MAINTENANCE AND TROUBLESHOOTING
Replacing the Fuse
Other than the fuse, there are no other user serviceable parts inside
the Matrix Switcher. If fuse replacement is required, always use the
correct fuse listed on the rear panel. Follow the steps below to
replace the fuse.
Turn off the power switch and unplug the unit.
Locate fuse holder adjacent to the cord connector.
Replace the fuse with the correct type and rating described on
the rear panel.
Close the fuse holder and restore power to the unit
Troubleshooting
Symptom Possible Explanation
There is no sound after
switching the amplifier ON
(sound worked previously).
The volume may have been set to minimum, or the
amplifier may have been muted (on a desktop amplifier)
before the amplifier was switched off.
The default volume, bass or
treble settings have
changed (when switching
the amplifier ON).
If a power failure occurs when the amplifier is ON, the
volume, bass and treble settings are saved and become
the new defaults.
The matrix switcher no
longer responds to button
presses.
Turn the Matrix Switcher off for several seconds, then on.
Use the power switch on the rear of the matrix switcher,
next to the power cord socket.
The Matrix Switcher does
not power up.
The fuse may need replacing. Remove the power cord
from the power outlet before replacing the fuse.
A mains circuit breaker trips
when amplifiers are
powered up.
This may occur if more than five amplifier power supplies
are connected to the same circuit, due to a high inrush
current.
An amplifier switches off,
particularly when the
volume is loud.
If insufficient current is available for the amplifier, it will
switch itself off. This may occur if the amplifier receives its
power from a matrix switcher. The amplifier may need its
own external power supply unit.
Audio is not broadcast via
the matrix switcher’s high
priority (HI) broadcast input.
The level of the audio connected to the broadcast input
may not be sufficient to trigger the broadcast.
Cannot hear any sound
when using the optical input
The digital audio source may be connected to the optical
output instead of the input (on a Matrix Switcher). Some
digital audio formats (such as surround sound) are
incompatible with the MRA system.