Panasonic SB-WAK770, SA-AK770, SB-AK770 Troubleshooting guide, Common problems, Playing the discs

Troubleshooting guide

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	• Turn off the demo function.	7
mode, the display lights up	• If you set the clock, demo function will be turned off automatically.	14
and changes continuously.
No response from the unit	• Press [y /l] for more than 10 seconds to turn off the unit. Alternatively, unplug the AC mains	—
even though it has been	lead and plug it in after a lapse of a few seconds.
turned on.	Turn the unit on again.
No response when remote	• Check that the batteries are installed correctly.	6
control buttons are pressed.
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.
A “humming” sound can be	• An AC mains lead or fl uorescent light is near the unit. Keep other appliances and cords	—
heard during play.	away from the unit.
“NO PLAY”	• Check the content.	—
	• Only MP3 format fi les can be played.	—
“ERROR” is displayed.	• Incorrect operation performed. Read the instructions and try again.	—
“ERROR” is displayed during	• You are not able to select other playback source (example: radio, USB and etc.) or press	12
recording.	[4, 4/ REW] or [¢ , 3/ FF] during recording.
	Stop the recording function.
“– –:– –” appears on the	• You plugged the AC mains lead in for the fi rst time or there was a power failure recently.	—
display during standby mode.	• Set the time.	14
“F61” is displayed.	• Check and correct the speaker cords connection.	5
	If this does not fi x the problem, consult the dealer.
“F76” is displayed.	• There is a power supply problem. Consult the dealer.	—

■ Playing the discs

Incorrect display or play will	• You have not inserted the disc correctly; insert it correctly.
not start.	• 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.
The total number of tracks
	• You have inserted a disc the unit cannot play; insert one it can.
displayed is incorrect.	• You have inserted a disc that has not been fi nalized or completely formatted.
The disc cannot be read.
Distorted sound is heard.
“VBR–” is displayed instead	• The unit cannot display the remaining play time for variable bit rate (VBR) tracks.
of the remaining play time.

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RQTV0286

■Using the cassette deck

Poor sound quality.	• Clean the heads.	23
Recording cannot be	• If the erasure prevention tabs have been removed, cover the holes with adhesive tape.	12
performed.

■ Listening to the radio

Distorted sound or noise is	• Use an outdoor antenna.	6
heard.
The stereo indicator flickers or
does not light.
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.	13
A low hum is heard during AM	• Separate the antenna from other cables and cords.	—
broadcast.

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