I had problems with my glissando/portamento, but resolved after replacing all the CMOS. The chip is a simple oscillator with square wave output. A 555 or other type of oscillator comprised of comparators could be made to work in exactly the same way. It would of course be a small separate board of multiple components and not as neat as the original BA617.
So not the end of the world if your truly have a bad BA617 and cannot locate a replacement.
ModuleMaster/Circuit Solutions Inc.
2006 S Main
Moscow, ID 83843, USA
www.modulemaster.com
Tel: 208-892-0764/888-892-0764
--- On Fri, 7/9/10, Max Fazio <faxiomas@...> wrote:
From: Max Fazio <faxiomas@...>
Subject: Re: [yamahacs80] Re: BA617
To: yamahacs80@yahoogroups.com
Date: Friday, July 9, 2010, 1:49 PM
Thx Gavin but I couldn't locate the chip on the site you mentioned!
Is the chip's ID the one you wrote, as a whole?
M
----- Original Message -----
From: gavin curtis
To: yamahacs80@yahoogroups.com
Sent: Friday, July 09, 2010 3:51 AM
Subject: Re: [yamahacs80] Re: BA617
If this IC is bad, it wouldn't be too difficult to find an alternative solution.
ModuleMaster/Circuit Solutions Inc.
2006 S Main
Moscow, ID 83843, USA
www.modulemaster.com
Tel: 208-892-0764/888-892-0764
--- On Thu, 7/8/10, zenithaudio2003 <zenithaudio2003@...> wrote:
From: zenithaudio2003 <zenithaudio2003@...>
Subject: [yamahacs80] Re: BA617
To: yamahacs80@yahoogroups.com
Date: Thursday, July 8, 2010, 5:08 PM
hi , i thinks this is all we got
http://www.flickr.com/photos/31603983@N05/
--- In yamahacs80@yahoogroups.com, "Max Fazio" <faxiomas@...> wrote:
>
> Hi all
> As on object: anybody has the datasheet? The one from Yamaha IC chips is poorly detailed and ther is no diagram...
> Thx for any help
> ;-)
> M
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
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[Non-text portions of this message have been removed]Message
Re: [yamahacs80] Re: BA617
2010-07-09 by gavin curtis