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Sony LBT-GPX555 Manual

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Page of 48
model name [LBT-GPX555 / MHC-GPX888/GPX555]
[4-485-746-11(2)] GB
37
GB
filename[D:\NORM'S JOB\SONY HA\SO130081\LBT-GPX555MHC-
GPX888_GPX555 (PMRF 01)\4485746112\080ADD.fm]
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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 system has entered standby 
mode.
• This is not a malfunction. The system 
enters standby mode automatically in 
about 15 minutes when there is no 
operation or audio signal output 
(page 35).
The clock or timer setting is canceled.
• The power cord is disconnected or a 
power failure occurred. Set the clock 
(page 15) and timer (page 33) again.
There is no sound.
• Adjust the volume.
• Check the speaker connections 
• Check the connection of the optional 
equipment, if any (page 11).
• Turn on the connected equipment.
• There is no audio output during 
Recording Timer.
There is no microphone sound.
(MHC-GPX888 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 
correct time (page 33).
• 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-GPX888 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.