Hi guys, a new bd3201 ic arrived , swapped the faulty one with this new one and noise went away. Bad news is I can’t get any effect signal out of it regardless of k4a switch position. Dry signal works fine and now the amplifier is usable , but no reverb at all. Seems like no signal is passing through the bd3201. Any ideas on how to further troubleshoot this??
I grabbed a scope, and probed all pins of bd3201 hoping someone more experienced could shed some light on this.
Injected a 0,2v 500Hz sin signal through the amp's input, and this is what I got:
BD3201 Pin 01 Digital OUT: IMG_9277.jpg
BD3201 Pin 03 and Pin 04 XTAL IN and OUT: IMG_9280 and IMG_9281
BD3201 Pin 16 DIGITAL INPUT : IMG_9278
BD3201 Pin 14 VDD: IMG_9282
BD3201 Pin 13 GND: IMG_9283
BD3201 Pin 12 !Reset: IMG_9284
BD3201 Pin 11 Sysclock: IMG_9285
BD3201 Pin 10 Bitclock: IMG_9286
BD3201 Pin 09 Wordclock: IMG_9287
All signals but the Digital OUT look right to me. Can you spot something which does not look good??
Thank you!!
Injected a 0,2v 500Hz sin signal through the amp's input, and this is what I got:
BD3201 Pin 01 Digital OUT: IMG_9277.jpg
BD3201 Pin 03 and Pin 04 XTAL IN and OUT: IMG_9280 and IMG_9281
BD3201 Pin 16 DIGITAL INPUT : IMG_9278
BD3201 Pin 14 VDD: IMG_9282
BD3201 Pin 13 GND: IMG_9283
BD3201 Pin 12 !Reset: IMG_9284
BD3201 Pin 11 Sysclock: IMG_9285
BD3201 Pin 10 Bitclock: IMG_9286
BD3201 Pin 09 Wordclock: IMG_9287
All signals but the Digital OUT look right to me. Can you spot something which does not look good??
Thank you!!
Attachments
Thanks Mhelin.
Could you explain that? Multimeter reads 4.3v on reset pin.
V1000 looks more available than this ic, same pinout, thanks for that !!
Could you explain that? Multimeter reads 4.3v on reset pin.
V1000 looks more available than this ic, same pinout, thanks for that !!