[sdiy] problematic sh101

[Oveloe]

I had a similar problem once with a Roland JX-8P, I couldn¹t move it too
much or bring it to play live because It would go bezerk. It had to stay in
my studio nicely layed on its synth stand. I didn¹t know how to fix the
synth in these days and I brought it to a tech, it turned out the circuit
board was very slightly cracked at one place (which wasn¹t even visible to
me) and every time the synth was moved, the contact would go out of wack.

You might want to check something like that...

Charles





> 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
> 
> 


http://www.oveloe.com
Voltage-Controlled Brain Waves

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