Question about Orion 8004 Car Audio Amplifier

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Amplifier repair i have a rockford fosgate amplifier. it recently stopped working and i would like to fix it on my own. any suggestions.

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Re: amplifier repair

Change out the fan if cant find one specifically 4 that amp get a fan from a old amp or computer and use it there easy 2 switch out or even modify if it dont fit in the amp just mount it on the out side on the air fins the problem was probably caused by 2 small of a ground or in line fuse is 2 small check spec sheet or manual but the ground should b as short as posible and a bigger wire than the positive wire make shure your fuze in amp is the right size if 2 big it will over heat and fry the amp

Posted on Apr 26, 2009

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Re: amplifier repair

Unknown model not working could be a bunch of things!
does the unit have power?? fuse(s) ok?? turn on voltage present(12v)?? Any leds?? Unit ever get wet?? Any lites?? smoke get out?? was it, did it get real hot??
I have worked on a few with various problems, no common problems. Some of the things I have seen; Level adj pot was smashed in, Shorted fets , + burnt gate drive resistors in the ps section + blown runs, bad connections, shorted outputs, corrosion from beer leakage, bad electrolytic caps, leaking caps ate up the copper runs, metal bars used to hold down fets and outputs came loose, parts over heated and shorted.
Open up and look around, burnt resistors, leaking caps, puffed up caps, black marks, are all helpful signs.
These amps typically use FETs in the power supply(+/- 25-50v) and regular transistors for the outputs. Test all heatsinked parts for shorts. Carefully remove metal bars holding down heatsinked parts, keep track of where the heat sink insulators go, remove pcb and inspect runs. Repair and bench test with a power supply that has an amp meter. With out any input, unit should only use a few amps after initial 5-15amps to get the PS fired up. Then test across speaker outputs for any DC voltage. Anything over 1v, (should be very close to zero) amp needs some more work.
Good luck!

Posted on Nov 06, 2007

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