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  1. Replies
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    Just use a dmm in resistance mode and put the...

    Just use a dmm in resistance mode and put the probes across the terminals, you'll see the shorted ones immediately.
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    Unfortunately no, when these big ballast...

    Unfortunately no, when these big ballast resistors become unsoldered the fans stop and *ONLY* spin when the protection circuits kick in. I almost always put 15 or 20 watt units in (they are...
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    Try disconnecting the two main capacitors and see...

    Try disconnecting the two main capacitors and see if either one of them is shorted also. The SCR's are common 4010's, although you can replace them with 4020 or 4025's for higher current...
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    I attached a couple to get you started. The...

    I attached a couple to get you started.

    The biggest thing to watch for is the large 10W resistor on the power supply board, make sure it hasn't desoldered itsself and that the fan spins on low...
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    Yes! What do you need to know? (or need done..)...

    Yes! What do you need to know? (or need done..)

    -Matt
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    Yes you can upgrade the caps, but some of the...

    Yes you can upgrade the caps, but some of the high capacitance versions are pricey. I re-capped all of my 900x2 amps over winter and ended up with 10,000's on the big 4 (same as originals) and...
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    Bill, Here's a power supply schematic that...

    Bill,


    Here's a power supply schematic that will most likely match your amp. The one I sent before was for a PP10 which has some extra stuff. Disregard the writing on it as I don't know who...
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    Holy cow! How many do you have? I rarely...

    Holy cow! How many do you have? I rarely see any of the Axxx series on ebay nor craigslist, where do you find them hiding?

    -Matt
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    Soundcraftsmen schematics: I have schematics for...

    Soundcraftsmen schematics: I have schematics for a bunch of Soundcraftsmen schematics (not the mtx soundcraftsmen stuff though, but I doubt things are much different). so if anyone needs something,...
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    I guess I should introduce myself! I'm a...

    I guess I should introduce myself! I'm a Soundcraftsmen nut just as much as a bunch of you are! I have 3 900x2's, a Pro-Power 10, Pro-Power 4, PM860, PM840, PCR800 amps as well as a...
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    PM me with your email address, I'll shoot ya a...

    PM me with your email address, I'll shoot ya a copy. rickedd46 - I PM'd you about schematics you may have for the newer mtx Soundcraftsmen stuff as I don't have any of those.
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