Sequential circuits samplers

Recently I have taken apart my P2002 for cleaning (some front panel 
buttons were sticky, and replaced a broken Disk drive), but now when I 
have re-assembled everything I noticed that the PSU unit make 'strange' 
noise and the p2002 does not turn on. I belive that the PSU has taken 
some damage when I cleaned the sampler. Does anyone know where to get a 
new PSU? I would be greatful for an answer.

Thanks in advance

Marko

Hi Marko,

I am in a similar predicament to you; I left my P2002 out 
and plugged in, and my 20-month old daughter came to visit 
me in the office/studio; after a while I thought "what's 
that click-click-click-click noise?" and looked down to see 
Sasha toggling the power switch. And now the P2002 either 
won't power on, or if it does it just says "1+".

So, my own silly fault obviously, but from peering in at the 
PSU it looks pretty standard, so it should be 
straightforward to troubleshoot and repair. I have the 
service manual, 'scope and decent multimeter but 
unfortunately I don't have any time ATM to get to the synth.

Anyway, my point is, you'd be much better off repairing the 
PSU yourself (or finding someone who can) than trying to 
source a replacement. Usually it's just a case of replacing 
whichever bits have blown up. And hoping that the digital 
electronics haven't been damaged.

Cheers,

John :^P

markolaukka wrote:
> Recently I have taken apart my P2002 for cleaning (some front panel 
> buttons were sticky, and replaced a broken Disk drive), but now when I 
> have re-assembled everything I noticed that the PSU unit make 'strange' 
> noise and the p2002 does not turn on. I belive that the PSU has taken 
> some damage when I cleaned the sampler. Does anyone know where to get a 
> new PSU? I would be greatful for an answer.
> 
> Thanks in advance
> 
> Marko

-- 
John Pallister
john@...

john's right- you, or a competent tech, should check the 12s & 5s
inside the beast... the power supply is extremely rudimentary compared
to the switched-mode supplies used in later samplers & synth modules.
hopefully you will have fried a regulator at worst, though there's
always a chance of worse damage if a conector has been reversed by
accident. I killed a disc drive this way in a cheetah sx16, but that's
another story... :-)

duncan

(ps I'm still looking for a keyboard controller IC if anyone has a
terminally ill 2000)

Thank you guys for your answers!
I also checked the fuse, and though it was not 'broken' it didn't quiet 
look ideal either, kind of 'burned', but that may been caused by me 
turning on the power. Anyway, I'll check if the voltage is correct from 
the chords. 
Thanks again.

/Marko