Panasonic SC SB-AK780 - Manual (Page 18)

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Before requesting service, make the following checks. If you are in doubt about some of the check points, or if the solutions indicated in the
chart do not solve the problem, consult your dealer for instructions.
■ Common problems Page
When the unit is in standby
mode, the display lights up
and changes continuously. • Turn off the demo function. 6
No response from the unit
even though it has been
turned on. • Press [ y/l] for more than 10 seconds to turn off the unit. Alternatively, unplug the AC mains
lead and plug it in after a lapse of a few seconds.
Turn the unit on again.
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No response when remote
control buttons are pressed. • Check that the batteries are installed correctly. 4
Distorted sound or no sound. • Turn the volume up.
• Turn off the unit, determine and correct the cause, then turn the unit on again.
It may be caused by straining of the speakers through excessive volume or power, and
using the unit in a hot environment.
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A “humming” sound can be
heard during play. • An AC mains lead or fl uorescent light is near the unit. Keep other appliances and cords
away from the unit.
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■ Discs
Incorrect display or play will
not start. • You have not inserted the disc correctly; insert it correctly.
• Disc may be dirty. Wipe it clean.
• Replace the disc if it is scratched, warped, or non-standard.
• Condensation has formed: Wait 1 to 2 hours for it to evaporate. 6
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The total number of tracks
displayed is incorrect.
The disc cannot be read.
Distorted sound is heard. • You have inserted a disc the unit cannot play; insert one it can.
• You have inserted a disc that has not been fi nalised or completely formatted. —
—
Disc tray(s) cannot open. • Press [ y/I] to release the jammed tray(s) as the unit will switch off. Turn it on again and the
tray(s) will initialise to the previous tray(s) condition.
• If this still does not fi x the problem, please consult the dealer.
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■ Radio
Distorted sound or noise is
heard.
The stereo indicator fl ickers
or does not light. • Use an outdoor antenna. 6
A beat sound is heard. • Turn the television off or move it away from the unit.
• Switch to either BP 1 or BP 2 when in AM tuner mode. —
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A low hum is heard during AM
broadcast. • Separate the antenna from other cables and cords. —
■ USB
The USB drive or its contents
cannot be read. • The USB drive format or its contents is/are not compatible with the system.
• The USB host function of this product may not work with some USB devices.
• USB devices with storage capacity of more than 32 gigabytes may not work in some
instances.
14
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Slow operation of the USB
device. • Large fi le size or high memory USB fl ash drive takes longer time to read. —
Troubleshooting guide
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