Vintage Simmons Drums (UK) Users Group

--- In Simmons_Drums@yahoogroups.com, "Jesper" <jesper@b...> wrote:
> alex:
> > > read slots yet when the unit powers up the trigger lights come 
on
> > dull and
> > > stay on and there is no reposne to midi in trigger in 
wahtsoever,
> 
> jesper:
> > > Sounds like a broken PSU! I thought that about my second SDS-V 
but
> > that was
> > > just a broken powerswitch. Where do you live? You haven't 
plugged a
> > 220 (or
> > > 240) volt SDS into a 110 wall outlet have you? (or the other way
> > around for
> > > that matter)
> 
> alex:
> > Reply: There is a red sticker on the back of it says 115V AC  so i
> > would assume that it is not one of the heavier models.  It is a 
rack
> > mont unit as opposed ot being in the black case however. but its 
stil
> > the standard 5 piece unit labled at 115 V AC.  I am using a 
standard
> > three prong power cord.  I live in Maryland. Annpolis baltimore
> > area.  Broken psu broken power swtich, transformer, what do i test
> > how what do i need to get to fix it and where.  I can install any
> > parts my self i just need to know exactly what to buy.
> 
> OK, US=110-120 volts so that doesn't seem to be the problem. The 
reason for
> me to ask is that Simmons was UK-based and the UK runs on 240, rest 
of
> Europe 220-230, Japan 110 etc.
> If the LED lights up (though dull) some electricity passes through, 
but
> basically not enough. To the right, behind the mixer "card", the 
PSU is
> located. If you are slightly experienced to looking on the inside of
> electronic machines a lot of testing can be done with basic 
equipment. I
> bought a electric current prober/tester at less than 10 USD. That 
fixed my
> SDS-V.
> 
> 1.    Check the wall outlet - should be 110-120 volts in the US.
> 2.    Check the SDS after the power switch - should still be 110-
120 in on
> mode and 0 in off mode. (mine was 0 in both)
> 3.    Check the output of the PSU - should be 15 volts.
> 
> My guess is that your PSU is broken and gives a lot less. A new PSU 
should
> cost something like 20-30 USD (fair guess).
> 
> If you're unexperienced with electronics or doesn't dare to try - 
check if
> you can find someone who knows the basics... I'll gladly help 
across the net
> if I can. Take it apart and finding the right places to check the 
power is
> not hard - finding the guts to do it is harder! ;)
> 
> Good luck!
> 
> electronically yours, jesper

I am expericened in electronics and i already have that side panel 
open and have the thing acessable i have a voltage tester too.  I 
woul like to note however that the leds that are coming are dull 
shouldn't be on at all because they are the triger signal lights.  
they should only light up as the elctor pulse comes in the input for 
each card.  Is there possibly a dc current problem i should test 
for..where?  
> 
> http://www.bolina.hsb.se/hsidor/jesper
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