[sdiy] SAJ110 issue resolved
Bob Weigel
sounddoctorin at imt.net
Sun Jun 20 04:51:32 CEST 2010
On 6/19/2010 12:27 AM, Bob Weigel wrote:
> It's actually where some of the chips will only work consistently
> under 7.5V and others refuse to work below 7.7 V. It's seriously that
> bad! In my Solina diagram it had said resistors were adjusted to get
> the voltage optimized so that's what I did before but it didn't last
> somehow. I've never seen such a stupid finicky bunch of parts as I
> somehow got here but..then again they seemed to be like I say more
> tolerent..the several I checked..in the Organizer 2. Wow. Well I
> may have to bring the voltage down there and sub in chips that will
> work that low since I absolutely can't seem to find any more that will
> work above that. I briefly had them all working then one warmed up
> and cracked up again.
>>
>
>
Well...I scrapped out an orchestrator that had a lot of rust and I was
thinking of scrapping anyway. First chip..dead. Second chip..worked.
Third chip..worked. So both of the flaky locations are replaced with
SAA1004 chips which are rated for these voltages but possibly have a
lower fail rate from what I've seen. Is this just HORRIBLE luck with
SAJ110's or has anyone else seen them having an unusually high fail
rate. MAN! That's something!! .1 V from working. LOL!
--
Check out sounddoctorin.com for songs, a studio tour, help
repairing old synthesizers and parts or thought provoking
articles that could help make your eternity!
More information about the Synth-diy
mailing list