Vintage Simmons Drums (UK) Users Group

Hi guys,

an update. I pulled the hihat from the rack yesterday (after completing 
the recording I was working on). The first I found was a neatly placed 
business card with my name and the date 2003-05-08 on it. Back then IC2 
was the rogue. I had no memory of this and I clearly was in my early 
soldering days 'cause I was stupid enough to exclude an IC socket... :-/

-- 
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se


philmurr skrev 2013-03-05 14:44:
> As the LED's are driven by IC2 and IC3, I'd definitely suspect one of
> them. IC3 is just inverting the outputs from IC2 so I think you're going
> to be correct with IC2.
>
> First of all I'd check that the solder connections for power to both
> chips are ok (14556 - pins 8/16 & 4011 - pins 7/14)
>
> --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, jesper wrote:
>  >
>  > philmurr skrev 2013-03-03 20:11:
>  > > I'm very happy my IV is working, next up is the SDS-V...
>  >
>  > Speaking of which...
>  >
>  > Can the tech guys here enlighten me regarding the program selector
>  > switches? I _guess_ the four switches end up at the same IC which opens
>  > the selected path... My hihat card works great upon startup if I stay
>  > with the factory preset. If I choose anything else it turns weird.
>  > Sometimes it plays some odd form of mix of all the presets but mostly
>  > it's just a lame and dull sound coming out. The LEDs either light up all
>  > or none. After fiften minutes or so it works as it should. It might be a
>  > bad soldering joint since heat might help...
>  >
>  > I dug out the schematics and looking at that crappy copy it looks as if
>  > the IC2 (14556) might be the culprit. IC1 is a 4013 btw. Any input from
>  > you soldering guys?
>  >
>  > --
>  > electronically yours, jesper
>  >
>  > - -- --- ---- ----- ---- --- -- -
>  > www.electronic-obsession.se
>  >