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46
US
MHC-V21.US.4-736-607-12(1)
••
Check the connection of the
optional equipment, if any
(page15).
••
Turn on the connected equipment.
••
Unplug the AC power cord (mains
lead), then plug in the AC power
cord (mains lead) again and turn
on the system.
There is no microphone sound.
••
Adjust the microphone volume
level.
••
Make sure the microphone is
connected to the MIC1 or MIC2/
GUITAR jack on the unit correctly.
••
Make sure the microphone is
turned on.
There is severe hum or noise.
••
Move the system away from
sources of noise.
••
Connect the system to a different
wall outlet.
••
Install a noise filter (not supplied)
to the AC power cord (mains lead).
••
Turn off surrounding electrical
equipment.
••
The noise generated by the
cooling fans of the system may be
heard when the system is turned
on. This is not a malfunction.
••
Move the unit away from the neon
signs or fluorescent light.
The remote control does not
function.
••
Remove the obstacles between
the remote control and the unit.
••
Move the remote control closer to
the unit.
••
Point the remote control at the
unit’s sensor.
••
Replace the batteries (R03/size
AAA).
••
Move the unit away from the
fluorescent light.
There is acoustic feedback.
••
Reduce the volume.
••
Move the microphone and guitar
away from the system or change
the direction of the microphone.
“CHILD LOCK” appears when you
press any button on the unit.
••
Set the Child Lock function to off
(page 44).
A clicking sound is heard when the
system is turned on.
••
This is the operating sound and it
occurs when the system is turned
on or off, for example. This is not a
malfunction.
The sound loses stereo effect
during playback.
••
Turn off the Vocal Fader
(page41).
••
Make sure the system is
connected properly.
Disc player
The disc tray does not open and
“LOCKED” appears on the display.
••
Consult your nearest Sony dealer
or local authorized Sony service
facility.
The disc tray does not close.
••
Load the disc correctly.
The disc does not eject.
••
You cannot eject the disc during
Synchronized Transfer or REC1
Transfer. Press to cancel the
transfer, then press on the unit
to eject the disc.
••
Consult your nearest Sony dealer.
Playback does not start.
••
Wipe the disc clean (page 52).
••
Reload the disc.
••
Load the disc that this system can
play back (page 8).
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