I'm troubleshooting my friend's t.mix PM400 mixer amplifier (old Thomann device) which have strange distortion issue when applying delay/echo. It uses very common PT2399 digital delay IC.
I've been unable to find schematics for the mix-amplifier. Does anyone have any tip where I could get those?
<edit> Ok. Just after I posted this I noticed two cracked solder joints on the delay/echo area on the pcb.
Resoldered those and voilà, it freaking works!!
So, no need for schematics anymore.
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