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Troubleshooting
16
Troubleshooting
No front panel indicator is shown
❍ Check that your AC power supply is connected
correctly.
❍ Check that the ON OFF switch on the back panel is in the ON
position.
❍ Check that the unit has been taken out of standby using the
front panel button or TRIGGER INPUT.
❍ Check that the fuse on the multi channel power amplifier back
panel and the fuse in the unit’s power plug have not blown;
see To change the mains fuse, page 17.
The sound has cut out
The 558 Multi Channel Power Amplifier includes a thermal
shutdown, which mutes the output if the amplifier becomes too
hot. The Standby LED will also become red.
❍ Leave the amplifier for a few minutes to cool down, the
Standby LED will turn green and the sound will come back on.
The 558 Multi Channel Power Amplifier also includes a power
circuit breaker to protect the loudspeakers. This is also triggered
if the mains supply is interrupted.
❍ Check the system for the cause of the cut out.
❍ Switch off, wait 5 seconds, then switch on to reset the power.