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Troubleshooting
18
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 fuse on the stereo power amplifier back panel
and the fuse in the unit’s power plug have not blown; see To
change the mains fuse, page 19.
The sound has cut out
The 559 Stereo 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.
The amplifier can then be taken out of standby using the front
panel button or the TRIGGER INPUT.
The 559 Stereo 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.