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Setting up the Stereo Power Amplifier
14
This section describes problems you may encounter when using
the Stereo Power Amplifier, and includes suggested solutions.
If these suggestions fail to cure the problem, please contact
your Meridian dealer for further assistance.
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 15.
The output is noisy when using
balanced leads
Check that the phono inputs are shorted, using the two phono
shorting plugs supplied.
Troubleshooting
The sound has cut out
The 557 Stereo Power Amplifier includes a thermal shutdown,
which mutes the output if the amplifier becomes too hot.
Leave the amplifier for a few minutes to cool down, and the
sound will come back on.
The 557 Stereo Power Amplifier also includes a power circuit
breaker to protect the loudspeakers.
Check the system for the cause of the cut out.
Switch off, wait 5 seconds, then switch on to reset the power.
The sound has a muddled stereo
image and some information from the
right-channel is lost
Check that the BRIDGE MODE switch is OFF when using the
amplifier in stereo.
When the BRIDGE MODE switch is ON, and both left and right
inputs are connected, the left output will be the correct stereo
left signal, but the right output will be a left minus right signal.
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