This amp was damaged due to strands getting inside of the board and 3 mosfets have burned
Your IC,S in it got fryed also.
SOURCE: on power up.......protect light comes on
what are the resistors connected to? mosfets?if so you need to identify which pin gate or source,these amps have dual so the other side would be the same.
SOURCE: P5002 Problem
The schematic is available from Rockford.
It's possible that the outputs have blown. They generally short from the center leg to the third leg when they fail.
Unless you have experience working with the MEHSA insulators, you may want to buy the entire MEHSA strip from Rockford. You can replace the transistors on the insulators but you have to use a torch to heat the strips.
SOURCE: not powering up
If the lights on the outside of the amp were dim, I'd expect the voltage at the amplifier's terminals to be low. Did you check the voltage at the amp with a multimeter?
As far as I know, replacement boards are not available. If there's something defective on the board, you'd have to replace the defective component.
SOURCE: when i hook up power sparks mosfets get hot real
i removed the output transistors then powerd up the amp they dident get hot
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SOURCE: My jcpower car amplifier is not sound come out
you are probably getting a high voltage jump when you turn it up which will throw the amp into protect mode the only thing I can think of is trying a voltage regulator for your stereo
It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers.Now that you have found the damaged components you can change them.
These items can be pruchased from any electronic spares parts shop.
After the job is done before you power please check the following:
Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.
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