Question about Jensen PS260 Car Audio Amplifier

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Amp Stopped working.

There was a similar submission with regard to the amp not putting out any sound. The blue Led's come on but the green power led does not come on. There is no sound and protect mode is not lit either. All I get is the blue LED's. I have had this amp for about 18 months and never pushed it too hard. It has always worked fine. I removed all the wiring and checked the fuses. No indication of damage, wear or burn in the unit or the wires. Totally confused here. Can you help?

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Re: Amp Stopped working.

I would suggest checking the unit for cold solder joints or bad solder joints. The onlt hope after that is a bad component. You will need a schematic and multimeter to do this with. Open the unit and measuer the main rail voltage this will provide the data you need to troubleshoot the unit with the use of the schematic.

Posted on Sep 16, 2007

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It sounds like part of the power switching circuit has failed. Your options would be to have it repaired/replaced or to try to repair it yourself. If you want to try to repair it yourself, visit the following link and then respond here. You will need to have the amp powered up and you'd need a multimeter to measure the voltage at several points on the board. A good quality photo of the circuit board would be helpful.

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This is common when the output transistors have failed. The amp powers up and the amp senses a problem and goes into protection mode. Generally, there is a protection LED but not all amps have them. To be sure that the problem is not installation related, check the DC voltage across B+ and ground when the amp tries to power up. If the voltage remains above 11 volts, the problem is almost certainly due to a failed component in the amplifier. Disconnect the signal lines and all speakers (disconnect the wires from the amp terminals) and try to power it up. If it powers up, you could have a defective speaker or defective wiring. If the amp still fails to power up, the amp should be checked by a qualified tech.

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Hello jasper100, Have you opened the unit to take a look inside? Since you dont have a blown fuse we cans assue the a short has not occured. Now I would chect to see if the voltage regulator in the amp has voltage coming from it. It may not in that case you may have to remover the old regulator and put in a new one just to get to the point of properly troubleshooting this amp. I would suggest that you get a schematic for this unit and use a multimeter to look at the voltages in the power supply section and see which sections have no rail voltage (12v supply voltage). I would also advise checking the remote to for regulator failure.

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