I have a good calibrated fluke multimeter but I don't have a scope. What
problem do you think the offsets on the TKS board are causing? The tuning
differences when using the transpose buttons or the portamento?
I'm thinking of replacing all the 4000 cmos chips on the tks and sh board
and then seeing what's up but I feel the transpose tuning is a calibration
issue (vr5-9 on tks board). I really have no.clue on the portamento.
Sent via DROID X on Verizon Wireless
-----Original message-----
From:
kirkbyte@...To:
yamahacs80@yahoogroups.comSent: Sun, Apr 17, 2011 07:35:14 GMT+00:00
Subject: Re: Re: [yamahacs80] Making Progress but need HELP
Sounds like some of the TKS offsets are not right. Re-check with a good
quality multimeter
Do you have a scope? I can tell you what might be wrong, but you will
probably need to trace it.
AK
> dzlvs8@... <dzlvs8@...> wrote:
>
> I love you Andy! I've only got a few more issues before everything is
>
> fixed now. I'm still only able to get the other three oscillators in
> tune
> on one of the four octave setting. I'm thinking ai just need to tweak
> some
> stuff on the TKS board or I need to mess with VR1 on the voice card for
> the
> note that doesn't sound good.
>
> The other problem is that portamento doesn't work. but its stuck on
> fast
> for one note and.is annoying. I can't turn it off or change ramp speed.
>
> Once in a great while I can mess with it and get it to do a long
> portamento
> slide but only once. and only on that one note.
>
> Any ideas on where to start looking?
>
> Sent via DROID X on Verizon Wireless
>
> -----Original message-----
> From: Andrew Kirkby <kirkbyte@...>
> To: yamahacs80@yahoogroups.com
> Sent: Sat, Apr 16, 2011 23:39:28 GMT+00:00
> Subject: Re: [yamahacs80] Making Progress but need HELP
>
> I buy everything from Digikey (www.digikey.com) - the part number is
> 296-2036-5-ND
>
> AK
> On 17/04/2011, at 8:45 AM, dzlvs8 wrote:
>
> > Well I have a stuck note and rooted it down to my 4016 IC. Luckily
> > online info helped me focus in that area and I verified that the
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