[sdiy] problematic sh101

[harrybissell]

naw... you guys just are not willing to pay for mil-spec construction :^P

Buying QUALITY is like buying oats
If you want nice, fresh oats you must be willing to pay a fair price for them
if oats that have been through the horse will satisfy you, you CAN get a
bargain...  ;^P

seriously, wave solder is pretty good. Its more about the crappy paper-phenolic
single sided pcbs...

and anyway... what fun would diy be if sh!t never broke. We'd never take it apart
!

H^) harry



mark verbos wrote:

> Ruud,
>
> I did the very same song and dance with an MC-202 for about 10 years on
> and off until I finally fixed it for real a couple months ago. I would
> bet you it's a hairline crack in a solder joint ont he board somewhere.
> After soldering all the connectors and chips as well as probing between
> the processor and other places I found that there was a crack in the
> solder on one pin of the processor. When I put the meter probe onto it,
> it would reconnect, so I never noticed it when I was measuring. All it
> took was touching the iron to the pin for a second and now everything
> works as new again. F__king wave soldering!!!!! I guess when you make
> 20,000 of a product you have to make them fast. ;)
>
> Mark
>
> Rude 66 wrote:
>
> >hi everyone,
> >
> >i'm trying to troubleshoot an sh101 for a friend (yes senso, that one again!
> >;-) first i thought it was the sequencer board, since when you push on the
> >case there, all the lights for the sequencer, arpeggiator etc go on and off
> >at random. however, i disconnected this board and now i find that also when
> >the synth is powered up and the case is stretched or pressure is on it in
> >any way, it completely loses its power. bend or push around a little and it
> >comes on again.. when working, the synth is fully functional.
> >inside, i noticed the bottom board being a bit warped. i cleaned it up, and
> >resoldered some connections that were a bit shady.
> >
> >my big question is: is all this more likely to be caused by the
> >wiring/connectors, or by bad solder joints? before i start on resoldering
> >all connections, i'd like to ask some advice on that.. the wiring looks
> >solid, and i've taken most of the connectors off and cleaned the contacts.
> >i've also cleaned and bent the little metal contact points on top of some
> >boards that appear to make a gnd connection with the metal back plate.
> >
> >problem is that the plastic case makes it very 'flexible' in that if i play
> >around with anything, the whole case flexes and it's very difficult to
> >pinpoint the problem to one area..
> >
> >any tips? (apart from 'give the thing back, it's a waste of time') ;-)
> >
> >thanks!
> >
> >ruud
> >
> >
> >
> >
> >