Troubleshooting; Factory Defaults - Technics SU-C550 Operating Instructions Manual

Troubleshooting

Before requesting service, make the following checks. If you are uncertain about some of the check
points, or if the solutions indicated in the following guide does not resolve the issue, then consult your
dealer for instructions.
Heat buildup of this unit
This unit becomes warm when used for a long
time. This is not a malfunction.
Do you have the latest
firmware installed?
Panasonic is constantly improving the unit's
firmware to ensure that our customers are
enjoying the latest technology. ( 38)
To return all settings to the

factory defaults

When the following situations occur, reset the
memory:
• There is no response when buttons are
pressed.
• You want to clear and reset the memory
contents.
1 Press [SETUP].
2 Press [ ], [ ] repeatedly to select
"Initialization" and then press [OK].
3 Press [ ], [ ] to select "Yes" and
then press [OK].
• All the settings are set back to the factory
defaults. It is necessary to set the memory
items again.
4 Press [ ], [ ] to select "Yes" and
then press [OK] again.
40
General
The unit does not work.
Operations are not done properly.
• One of the unit's safety devices may have been
activated.
Press [ ] on the unit to switch the unit to
standby.
• If the unit does not switch to standby,
press [ ] on the unit for at least 5
seconds. The unit is forcibly switched to
standby.
Alternatively, disconnect the AC mains
lead, wait for at least 3 minutes, then
reconnect it.
Press [ ] on the unit to switch on. If the
unit still cannot be operated, consult the
dealer.
A "humming" sound can be heard during
playback.
• An AC mains lead or fluorescent light is near
the cables. Keep other appliances and cords
away from the cables of this unit.
• A strong magnetic field near a TV or other
device may adversely affect the audio quality.
Keep this unit away from such devices.
• The speakers may output noise when a device
nearby is emitting powerful radio waves, such
as when a mobile phone is on a call.
No sound.
• Check the volume of this unit.
• Check connections to speakers and other
equipment. After checking the connections,
measure the output signal of the amplifier.
( 39)
• Check to see if the correct input source is
selected.
• Insert the plugs of the cables to be connected
all the way in.
• Playback of multi-channel content is not
supported.
• The digital audio input terminals of this unit can
only detect linear PCM signals. For details, refer
to the operating instructions of the device.