Sequential circuits samplers

OK P2000 fans, here is a quick update of my repairs so far.  First, I
dissassembled the entire unit(all pcbs removed).  I cleaned all the
insides of the P2000 including the inside of the case and the tops and
bottoms of all pcbs.  My P2000 has a 512K memory pcb. After
resoldering some connections around the keyboard multiplexer IC, (the
large 40pin near the left edge; it's labeled "keyboard"), I now have
every key working now!!  But, unfortunately, the 12 patches are not
working corectly.  Before, the keys were intermittant, but the 12
patch buttons/LEDs worked OK.  Now, all the keys work OK, but the
patch buttons/LEDs jump around when pressed or when some keys are
pressed. There is still a multiplexer problem.  My instincts say it's
on the front panel multiplexer pcb. I will order some new ICs soon.
Another note:  the filter was not "working" before; now, I can get
the frequency and resonance changes on certain patches.  This, again,
points to multiplexer problems.  More when I get time...   T

--- In prophet2000@yahoogroups.com, "TonyB" <tbarros@...> wrote:
>
> Ok P2000 fans, I got my P2000 opened.  Surprisingly easy to service
> with the built-in hinge in the back!!  OK, I have a Q for any of you
> that have a fully functional P2000:  With no diskette, after booting
> up, are all keys working??  That is, i select built-in sample #4,
> which is a great, IMHO, hammond sample, does every key play a note?
> What about the L/R knob??  For sample #4, is the sound ONLY on the
> Left? PLMK, so I can continue troubleshooting my P2000.  thanx. T
> 
> --- In prophet2000@yahoogroups.com, "Charles Lee" <crlee311@> wrote:
> >
> > Yes, but my built in sounds don't work!  I spent $250 for this on
> Ebay and I'm to the point where I would GIVE it to someone (other than
> Winecountry) if they came and picked it up...
> > What did Ripley say?  Well... it's me...
> > 
> > 
> > From: TonyB 
> > Sent: Friday, May 16, 2008 5:17 PM
> > To: prophet2000@yahoogroups.com 
> > Subject: [Norton AntiSpam] [prophet2000] Re: What's special in the
> Prophet 2000
> > 
> > 
> > Hi Gil, Let me pull out the manual and review the startup proceedures.
> > I have my P2000 down from the attic and have been meaning to pull it
> > out of the box and check out all functions. IIRC, there was a way to
> > check the amount of memory in the unit(?) Different mem configs meant
> > different sound storage, in that, if the mems were not the same on 2
> > P2000's, the samples on one would not work(or work wierdly)on the
> > other. Give me a week or so.... I'll post back to your thread..afn T
> > 
> > --- In prophet2000@yahoogroups.com, "gil_we" <gilwe@> wrote:
> > >
> > > I'm in a kind of dilemma. I have that P2K which is in a very good
> > > shape but doesn't boot up. How practical is the instrument to use if
> > > at all ?
> > > I'm thinking about parting it out but not sure if that's a good
move.
> > > I already have a P5 Rev3.2 in a perfect condition (I restored it) so
> > > I'm not sure dealing with tons of floopy disk just to get "that" SCI
> > > sound will interest me. Is it easy to use ? Can you make sounds with
> > > not much hassle ? How much does it sell on ebay ?
> > > 
> > > Thanks !
> > >
> >
>