[sdiy] Akai AX80 weird PWM behaviour on Voice 8 when Saw wave enabled

[Veronica Merryfield]

Welcome to the list James!

On 2012-07-08, at 12:23 AM, james meagher wrote:

> looking most suspiciously at IC704 (a 14 pin TC4011BP) and somewhat
> less suspiciously at IC802 (an 8 pin NJM4558D). I'm suspicious of

4011 is a quad two input nand chip. TC is the manufacturers code and BP is the type family. 
The NJM4558D is a high current output op-amp.
Mouser should have both but from memory DigiKey don't carry the NJM4558 part.

> Again, if anyone wants a PDF copy of the AX80 Service Manual feel free
> to give me a shout. It's not the best PDF of an old service manual,
> but it's quite legible.

Send it over.

Veronica