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Troubleshooting - Panasonic CY-PA2003U Operating Instructions Manual

1200w 2-channel power amplifier.
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Troubleshooting

If You Suspect Something Wrong
Check and take steps as described below.
If the described suggestions do not solve the problem,
it is recommended to take the unit to your nearest
authorized Panasonic Servicenter. The product should
be serviced only by qualifi ed personnel. Please refer
checking and repair to professionals.
Panasonic shall not be liable for any accidents arising out
of neglect of checking the unit or your own repair after
your checking.
Never take measures especially those other than
indicated by italic letters in "Possible solution"
described below because those are too dangerous for
users to handle themselves.
Problem
No sound available.
The power cord (battery, power and ground) is connected in the wrong way.

Check the wiring.
The contact of the ground lead is poor.

Make sure that the ground lead is connected to an unpainted part of the chassis
securely.
The speaker cord is short-circuited.

Check the speaker cord, and replace the fuse.
The speaker received damage because of too small input capacity.

Obtain the right speaker allowed to connect this unit, and replace the fuse. (page
34)
The speaker cord is not properly connected.

Properly reconnect so that the polarity matches between the speaker cord and
the terminal.
The speaker cord is bitten with a screw of the vehicle.

Correct the wiring of the speaker cord.
The knob for sound volume control is not properly adjusted.

Properly adjust it.

Adjust the volume of the Head Unit.
Input Select (LINE/SPEAKERS) is not set in accordance with the speaker output cord
of the Head Unit.

Check the Input Select (LINE/SPEAKERS) setting.
32
CY-PA4003U/PA2003U/PAD1003U
Warning
 Do not use the unit in abnormal condition, for
example, without sound, or with smoke or foul
smell, which can cause ignition or electric shock.
Immediately stop using the unit and consult your
dealer.
 Never try to repair the unit by yourself because it is
dangerous to do so.
Possible cause  Possible solution
Problem
No sound available.
There is an electromagnetic-wave generator such as a cellular phone near the unit or
(continued)
its electrical lines.

Keep the electromagnetic-wave generator such as a cellular phone away from
the unit and the wiring of the unit. If noise cannot be eliminated due to the wiring
harness of the car, consult your dealer.
Fuse blows out.

Eliminate the cause of fuse blowout and replace the fuse with new one. Consult
your dealer.
Bad sound quality
The bass is too much enhanced.

(Distorted sound)
Set the bass boost appropriately.
Noise
Sound comes out from
<CY-PA4003U>
only either the Front
The 2CH/4CH setting of the speaker input is incorrect.

2CH or the Rear 2CH.
Set it correctly.
Only the bass is
<CY-PA4003U, CY-PA2003U>
available.
The Crossover Filter Switch (LPF/OFF/HPF) is turned off.

Set it on LPF or HPF according to the speaker connection.
<CY-PAD1003U>
The Crossover Filter Switch (LPF/OFF) is turned off.

Set it on LPF according to the speaker connection.
Only the treble is
The setting of Crossover Frequency Control is incorrect.

available.
Check the Crossover Frequency Control setting.
The Protect lamp lights
The speaker cord is short-circuited.

red.
Check the speaker cord, and replace the fuse.
The speaker received damage because of too small input capacity.

Obtain the right speaker allowed to connect this unit, and replace the fuse. (page
34)
The speaker cord is not properly connected.

Properly reconnect so that the polarity matches between the speaker cord and
the terminal.
Fuse blows out.

Eliminate the cause of fuse blowout and replace the fuse with new one. Consult
your dealer.

Possible cause
Possible solution
CY-PA4003U/PA2003U/PAD1003U
33

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Cy-pad1003uCy-pa4003uPa4003u - amplifier

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