Yamaha A-S2000 - Amplifier Owner's Manual - Page 24
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Troubleshooting
Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or
if the instructions below do not help, turn off this unit, disconnect the AC power cable, and contact the nearest authorized
Yamaha dealer or service center.
Problem
The AC power cable is not connected to
This unit fails to turn
the AC IN inlet on the rear panel or not
on.
plugged in the AC wall outlet.
The protection circuitry has been activated
because of a short circuit, etc.
This unit has been exposed to a strong
external electric shock (such as lightning
or strong static electricity).
The protection circuitry has been activated
The POWER indicator
because of a short circuit, etc.
on the front panel
flashes.
There is a problem with the internal
circuitries of this unit.
The protection circuitry has been activated
The INPUT indicator
because of a short circuit, etc.
on the front panel
flashes and the
volume is turned
down when you turn
on this unit.
Incorrect input or output cable
No sound.
connections.
No appropriate input source has been
selected.
The SPEAKERS switch is not set
properly.
Speaker connections are not secure.
The protection circuitry has been activated
The sound suddenly
because of a short circuit, etc.
goes off.
Incorrect cable connections.
Only the speaker on
one side can be
heard.
Incorrect setting for the BALANCE
control.
The + and – wires are connected in
There is a lack of bass
reverse at the amplifier or the speakers.
and no ambience.
Incorrect cable connections.
A "humming" sound
is heard.
No connection from the turntable to the
GND terminal.
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En
Cause
Connect the AC power cable firmly.
Check that the speaker wires are not touching each
other or shorting out against the rear panel of this
unit, and then turn the power of this unit back on.
Turn off this unit, disconnect the AC power cable,
plug it back in after 30 seconds, and then use it
normally.
Check that the speaker wires are not touching each
other or shorting out against the rear panel of this
unit, and then turn the power of this unit back on.
Disconnect the AC power cable and contact the
nearest authorized Yamaha dealer or service center.
Check that the speaker wires are not touching each
other or shorting out against the rear panel of this
unit, and then turn the power of this unit back on.
Connect the cables properly. If the problem persists,
the cables may be defective.
Select an appropriate input source with the INPUT
selector on the front panel (or one of the input
selector buttons on the remote control).
Switch the SPEAKERS switch to the appropriate
position.
Secure the connections.
Check that the speaker wires are not touching each
other or shorting out against the rear panel of this
unit, and then turn the power of this unit back on.
Connect the cables properly. If the problem persists,
the cables may be defective.
Set the BALANCE control to the appropriate
position.
Connect the speaker wires to the correct + and –
phase.
Connect the audio cable plugs firmly. If the problem
persists, the cables may be defective.
Connect the turntable to the GND terminal of this
unit.
Remedy
See
page
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