20 Most Recent Rockford Fosgate Punch 401S Car Audio Amplifier - Page 4 Questions & Answers

You may have a blown speaker. I would check for that.

IF you are looking for a schematic diagram on the amp, you wont find it. IF you need the connection information you can look on their site, There is a repair video on that unit attached . Rockford Fosgate Car Stereo Amp Repair

Internal short

Found an online owners manual for your Punch P500.2. This only covers installation and setting gains etc and doesn't have a circuit schematic repair diagram - Rockford Fosgate Punch P500 2 Manuals

The transistors will have the part number on them. Post a photo of the devices needed. Are they missing or exploded to the point they are not legible?

Pull the cover off of the amp, the model will be on the circuit board somewhere.

Does it try to power up and blow fuse? Does it power up and stay in protect? Is it completely dead and does nothing?

I would use a T500-1bdcp

Are you talking about the diagram on the unit itself? Are you trying to install without the factory harness or are you just wondering what wire are what?

Sounds like there may be a problem with the unit internally. The laser may be out of alignment or very dirty. Have you tried a cleaner disc?

What exact model of amplifier is this?

I would suspect the factory amplifier has failed, or possibly the factory sub is blown. Try unhooking the sub and then power the system.

Depending on what model of P3 you have, you'll need to order re-cone parts. The subwoofer will have to be stripped down to a bare basket and all glue sanded off and surface clean. Shims will be needed to get the coil in place properly around the pole. Clamps may be needed as well until the glue sets. There are many videos online to show you how.

Something is shorted on the output, or there is a leaking or shorted op-amp in the input section.

There is something shorted inside the amp causing it to shut down.

Decent amp, not my favorite line. These models were built a little cheaper and tend to suffer catastrophic failures.