Kustom KPS PM300 mixer amp , 2005, owner lent to a church for some do and came back intermittant failure on both channels , now dead. There is some distinctive greyish chopped strand fibre laying about inside, not heaps of it but noticeable on otherwise new looking amp. Too coarse for asbestos and too fine for glass fibre and putting a clump lazily between DVM probes easily gives 10 to 30 ohms. Does carbon fibre look greyish rather than black ?
Only initial tryout and internal visual checks so far but ps , prea seem to be ok , but no o/p L or R. As no relay click over , I suspect uPC1237 SIL protector IC at the moment rather than failed 2x 150W Sanyo STK412-170 Hybrid module as both ch down, no burning etc. Not powered up exposed yet, tomorrow job. I'm a bit surprised no fan in this amp. I have relevant pinouts and PS DC on overlay, but any ideas on what the conductive stuff is / source? Don't spooksville use something like that to get taken into ventillation systems to knock out electronics?
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