Panasonic sc-ak78 User Manual
RQT5289
42
Troubleshooting guide
Before requesting service for this unit, check the chart below for a possible cause of the problem you are experiencing. Some simple checks or a
minor adjustment on your part may eliminate the problem and restore proper operation.
If you are in doubt about some of the check points, or if the remedies indicated in the chart do not solve the problem, refer to the directory of
Authorized Service Centers (enclosed with this unit) to locate a convenient service center, or consult your dealer for instructions.
minor adjustment on your part may eliminate the problem and restore proper operation.
If you are in doubt about some of the check points, or if the remedies indicated in the chart do not solve the problem, refer to the directory of
Authorized Service Centers (enclosed with this unit) to locate a convenient service center, or consult your dealer for instructions.
While listening to FM broadcasts
There is a “rushing noise”
during a stereo broadcast
which is not audible during
a monaural broadcast.
during a stereo broadcast
which is not audible during
a monaural broadcast.
You hear excessive noise
during a stereo broadcast,
and occasionally the sound
disappears.
during a stereo broadcast,
and occasionally the sound
disappears.
The stereo indicator (“ST”)
flickers and does not light
completely.
flickers and does not light
completely.
The sound during a stereo
broadcast is highly distort-
ed.
broadcast is highly distort-
ed.
The transmitting station is distant.
The installation location and orientation of
the antenna are unsuitable.
the antenna are unsuitable.
The transmitting station is distant.
The power of the TV set or VCR is ON.
There is a building or mountain nearby. [Dis-
tortion is caused by interference between
the signal from the transmitting station (di-
rect wave) and the signal reflected from the
building or mountain (reflected wave).]
tortion is caused by interference between
the signal from the transmitting station (di-
rect wave) and the signal reflected from the
building or mountain (reflected wave).]
If you are using an indoor antenna, change
to an outdoor antenna.
to an outdoor antenna.
Try switching off the TV set or VCR.
Use a high-grade outdoor antenna, and in-
stall it in a good location, height, and orienta-
tion for reception.
stall it in a good location, height, and orienta-
tion for reception.
8
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8
While listening to AM broadcasts
You hear an unusual beat
sound.
sound.
You hear a low-frequency
hum.
hum.
You are using the system at the same time
you are playing a TV set.
you are playing a TV set.
The antenna wire is near the power cord.
Switch off the TV set, or use the system fur-
ther away from it.
ther away from it.
Separate the antenna wire from the power
cord.
cord.
Problems common to all systems
ECO mode is on but the
display panel still lights up.
display panel still lights up.
The location of the various
musical instruments is not
well defined.
musical instruments is not
well defined.
The left and right sounds
are reversed.
are reversed.
LOW frequency sounds
cannot be heard.
cannot be heard.
When listening to the exter-
nal unit, the left and right
sounds are reversed.
nal unit, the left and right
sounds are reversed.
There is no sound when a
source is being played.
source is being played.
“ERROR” message ap-
pears on the display.
pears on the display.
“ – – : –– ” appears on the
display.
display.
“F61” appears on the dis-
play.
play.
DEMO mode is on.
The (+) and (–) connections to one of the
speakers are reversed.
speakers are reversed.
The left and right connections to the speaker
are reversed.
are reversed.
Either the left or the right LOW speaker ca-
ble is not connected.
ble is not connected.
The left and right connections to the external
unit are reversed.
unit are reversed.
The (+) and (–) wire of the speaker cords
are shorted.
are shorted.
Incorrect operation has been done.
• You plugged the power cord in for the first
time.
• There was a power failure recently.
Check if the speaker cords have shorted.
Turn DEMO mode off.
Connect the speaker cords correctly.
Connect the speaker cords correctly.
Connect the left and right speaker cables to
the LOW terminals.
the LOW terminals.
Connect the external unit’s cord correctly.
Switch the system to the standby mode, and
reconnect the speaker cords so that they are
not shorted. Then switch on the power.
reconnect the speaker cords so that they are
not shorted. Then switch on the power.
Operate the unit correctly by following the
operating instructions.
operating instructions.
Set the time.
If they are not shorted then there is a power
supply problem. Consult your dealer for as-
sistance.
supply problem. Consult your dealer for as-
sistance.
12
7
7
7
9
7
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13
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Problem
Probable cause(s)
Suggested remedy Reference page(s)
Reference
For detailed instructions, contact an authorized servicenter in the U.S.A. and Panasonic Canada Inc. Customer Care Centre in Canada.
In the U.S.A. 1-800-211-7262 or web site
(http://www.panasonic.com)
In Canada 905-624-5505 or web site (www.panasonic.ca )
In the U.S.A. 1-800-211-7262 or web site
(http://www.panasonic.com)
In Canada 905-624-5505 or web site (www.panasonic.ca )
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