Hey guys!
I'm working on a Kustom quad 200HD guitar amplifier which has a problem. The power amp has a relay that disconnects the output when there is something wrong. The protection IC (a C1237HA) keeps triggering the relay when a signal is put through the amplifier. First thoughts were that the power amp IC (a STK404-140s) was broken and might be outputting DC. But after checking that the amplifier seems to be in working order.
My guesses would be that either the relay is busted or the protection IC is. But I can't seem to verify that theory so it must be something I'm not thinking of (isn't it always?).
KPM7200-7250-T_schematics.pdf <--- Schematic of the board in question
Thanks in advance!
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