[sdiy] Prophet 5 dead output after ship...anyone?

[Bob Weigel]

Thanks Tim. I'll forward this to him.  I tried to explain to the 
obnoxious guy who replied to me direct from the list (name omitted in 
hopes that the guy might GROW UP...ahem.) that sonic vibration (like 
from a cargo compartment) can wiggle things loose sometimes.  But he was 
CERTAIN somehow that my lack of putting bubble wrap all over the 
controls and letting them drag sideways everytime someone dropped it was 
for sure the problem :-)
  I  had all of the connectors apart a couple times and wouldn't think 
they'd spew at this time since I never saw any problem before but who 
knows. Doubt it's power supply related.  Things would have to get real 
off to not put any sound out; given that the digital stuff is all 
working ok it seems..but..who knows again.  I'd be a lot more troubled 
if there were problems in the digital realm. Or if distortions had 
arisen or the like.  This sounds definitely like a bad connection 
somewhere that didn't surface for me somehow in all the testing we gave 
it. -Bob

Tim Parkhurst wrote:

>>-----Original Message-----
>>From: Bob Weigel [mailto:sounddoctorin at imt.net]
>>Sent: Tuesday, June 14, 2005 12:00 AM
>>To: analogue list; synthdiy
>>Subject: [sdiy] Prophet 5 dead output after ship...anyone?
>>
>>I sent a P5 over to GB that had worked perfect here the whole way.  I
>>tested it one last time after doing a little touch up on the key
>>allignment or something as I recall, then boxed it up and shipped it
>>with a great box design that had it floating on white foam end blocks
>>pretty well isolated all the way there.
>>He said it seems to be responding to patch changes and when you
>>hit
>>keys the LED flickers a bit as it does when MIDI information comes in.
>>But no sound out.  I told him to verify that it's getting to the
>>master
>>volume with a headphone amp or such but..anybody have any thoughts on
>>what likely happened. He didn't see any wires falling off or anything.
>>He tried programming a patch with filter open etc. no go-Bob
>>
>>    
>>
>
>Hi Bob, 
>
>If you think the your customer is capable of doing it, I'd suggest having
>him open up the P5 and disconnecting/reseating every cable connection he can
>get to. Might also be worth it to press on any socketed ICs to make sure
>they're properly seated (after hooking up a wrist strap first, or at least
>always keeping one hand on a metal part of the chassis). I had two synths go
>belly up on me in the last month, and both were fixed by
>disconnecting/reseating everything. 
>
>Basically, I think no matter how well the P5 was packed, the internals still
>get shaken around during transport. I'd bet Harry's next paycheck that it's
>no more than a bad connection. MAYBE it's an 'iffy' solder joint that got
>wiggled a little too hard on the trip across the pond, but the
>socket/connector check would certainly be easier for the customer to do. And
>finally, though this is a bit 'out there', perhaps a PS trimmer got knocked
>around enough to put one of the supplies too far out of whack. Maybe have
>the customer check the supply voltages too. Maybe. 
>
>Anyway, just my $US0.02
>
>
>
>Tim (surely you didn't think I was going to bet my OWN paycheck) Servo
>
>"And don't call me 'Shirley'" - Leslie Nielsen
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