Question about Pioneer Car Audio & Video
Posted by Anonymous on
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Posted on Jan 02, 2017
here is a short test you can try, remove the rca audio cable from the amp & connect a diskman or toher audio o/p device that you can hook up with the same rca wires, turn on the amp & see if you have sound. you can also remove the speaker wires from the sub & using multi meter read the ohm's of the sub, most subs are 4 ohm. Hope this help locate your problem
Posted on Nov 04, 2006
Apart from the external DC power fuse (I hope you have one in-line), the majority of in-car amps have 2 mini fuses inside the unit to protect the output MOSFETs from overloading due to incorrect speaker connections, ie, if the output impedence is rated at 4ohms, anything less than that is considered to be a short circuit, and will overload the MOSFETs. After performing the tests suggested by KaeZoo, open the unit and look for printed markings on the circuit board, something like F1, F2, the fuses may not look like conventional fuses.
Posted on Jun 12, 2007
If you are connecting the negative lead of the voltmeter to the chassis of the car, and then checking the voltage at the amp on the ground power input of the amplifier, then your amplifier is not grounded properly. The amp should also be grounded on the chassis of the car, so if you have 4 V DC on it, it can not possibly be grounded to the chassis. The chassis is the same potential at any point on the car.
Could it be that the 4 V DC is at the power terminals +B or positive voltage? That would not be an uncommon thing to have since the amplifier will hold some charge after it is turned off and that would be normal.
Since you have a voltage meter, you could check the current draw of the amplifier if your meter also have a setting for current or amps.
If so, connect the meter in series with the ground of the amplifier. That means to disconnect the ground wire at the amplifier, and use the meter to complete the ground connection by putting one lead of the meter on the ground wire that should be connected to the chassis of the car and the other lead to the ground terminal of the amplifier. It does not matter which lead you connect to the wire or the amplifier, that would only make your measurement i postive current or negative current, but the meter must be set up properly for current. Most of them have a diiferent jack to put the positive lead into for current. most have two different jacks. If yours does also, choose the lead with the larger amp rating. Most have 10A and 300mA, the lareger amp rating is 10A. That is 10 amps max and the 300mA means 300 milli-amps which is .3 amps max.
Do this with the amplifier turned off and the car off. If you measure any current at that point you do have a current draw with the amp off and the amp would need to be serviced by a professional. If you have no current draw there, the amp is not the source of your battery draining. This would find out for certain if the amplifier is really draining the battery.
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Posted on Jun 27, 2008
Check all ground cables from your truck's stereo and amplifier as well. Sometimes when ground cables get loose you hear those thumping noise in your subs. GOOD LUCK!!
Posted on Nov 06, 2008
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