7/1/2023 0 Comments Rockford fosgate amp![]() ![]() Since you seem to have a problem with the amp output circuit, an AC ripple would be the least of your current problem(s). That is, unless you can positively identify the ground traces with screw holes, in which case you need only to replace those screws.ī+ leveling is just another term for "smoothing" the DC, or removing any AC ripple (in this case, from the alternator) from the DC line feeding the amp and possibly finding its way into the audio amp circuits. Most times I'm a big fan of NOT putting back tie-down screws when I expect to have to "go back in" to a device for further (or additional) repairs - it just saves time.īut in this case, not knowing what screws are involved in the overall situation of the grounding traces on the PCB, I'd recommend replacing them all before testing the board. The other cap is in the power supply too tied to ground, but I dont have that on the schematic to show you The one cap that blew is tied to ground right off of B+ 12 volts, the cap is rated for 25 volts how could it blow with a bad ground? Could it be from the switching powersupply? ![]() ![]() The board has like 20 ground screws to the chassis, and my friend said that could have blew the caps. The two caps that blew are in the power supply though, and when I tested the amp when they blew, I only had two ground screws installed on the board. Did the caps blow because the drivers were bad before and replaced them and they were trying to drive the output mosfets that aren't installed? I checked the drivers nothing heated up, and I didn't mix anything up. The output drivers I replaced them all, and then turned the amp on and two small capacitors blew. The output mosfets were bad but not shorted, I removed them completely from the amp and it still worked fine idling with 1.7amps of current. I'm working on a RF amp, the power supply is working fine I replaced all the power supply mosfets and drivers, and it idles with 1.7amps of current and doesn't go into protect mode anymore. ![]()
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