Troubleshooting – Sony LBT-GPX55 User Manual
Page 33
model name [LBT-GPX77/GPX55/MHC-GPX88/GPX77/GPX55/GPX33]
[4-449-052-13(1)] GB
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Troubleshooting
Should you encounter a problem with
your system, find your problem in the
troubleshooting checklist below and take
the corrective action.
If the problem persists, consult your
nearest Sony dealer.
Note that if the service personnel changes
some parts during repair, these parts may
be retained.
General
The clock or timer setting is canceled.
• The power cord is disconnected or a
power failure occurred. Set the clock
(page 14) and timer (page 29) again.
There is no sound.
• Adjust the volume.
• Check the speaker connections
• Check the connection of the optional
equipment, if any (page 10).
• Turn on the connected equipment.
• There is no audio output during
Recording Timer.
There is no microphone sound.
(MHC-GPX88 only)
• Adjust the microphone volume.
• Make sure the microphone is connected
to the MIC jack 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 (commercially
available) to the power cord.
• Turn off surrounding electrical
equipment.
The timer does not function.
• Check the timer setting and set the
• Cancel the Sleep Timer function
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 (R6/size AA).
• Move the unit away from the
fluorescent light.
There is acoustic feedback.
• Reduce the volume.
• (MHC-GPX88 only) Move the
microphone away from the speakers 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
If “PROTECT EXX” (X is a number)
appears in the display panel
Immediately unplug the power cord,
and check the following items.
• Are you using only the supplied
speakers?
• Is anything blocking the ventilation
holes of the unit?
After checking the above items and
fixing any problems, plug in the power
cord again and turn on the system. If
the issue persists, consult your nearest
Sony dealer.