Yamaha R-S700 Owner's Manual page 42

TROUBLESHOOTING
Problem
A "humming" sound
can be heard.
The volume level is
low while playing a
record.
The volume level
cannot be increased,
or the sound is
distorted.
The sound is
degraded when
listening with the
headphones
connected to the CD
player or the tape
deck connected to
this unit.
The sound level is
low.
The input source
cannot be changed
although the INPUT
selector is rotated.
Using the BASS,
TREBLE, BALANCE
and LOUDNESS
controls does not
affect the tonal
quality.
40
En
Cause
Incorrect cable connections.
No connection from the turntable to the
GND terminal.
The record is being played on a turntable
with an MC cartridge.
The component connected to the TAPE
REC or LINE 1 REC output jacks of this
unit is turned off.
The power of this unit is turned off, or this
unit is set to standby mode.
The loudness control function is
operating.
The CD DIRECT AMP switch is turned
on (R-S700 only).
The CD DIRECT AMP (R-S700 only) or
the PURE DIRECT switch is turned on.
Remedy
Connect the audio plugs firmly. If the problem
persists, the cables may be defective.
Make the GND connection between the turntable and
this unit.
The turntable should be connected to this unit through
the MC head amplifier.
Turn on the power of the component.
Turn on the power of this unit.
Turn down the volume, set the LOUDNESS control
to the FLAT position, and then adjust the volume
again.
Turn off the CD DIRECT AMP switch.
The CD DIRECT AMP or the PURE DIRECT switch
must be turned off to use those controls.
See
page
10
10
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