Xpantastic!

Yep,- recap the 2.2U 50V ones,- there are 70 on the voiceboard and 
Digikey has �em in a package of 100pc for cheap.
Think about replacing Schmitt-Trigger chips as well, there are 2.
Check also your tact switches, you�ll find new ones frm Marquardt, the 
manufacturer of the originals.
On my Xpander, double triggering of the switch under [ALL] in the tuning 
page caused the message of [FAIL] too.


Am 28.01.2012 02:29, schrieb William Cason:
> I was just going to say the same thing.  If you swapped all the chips, 
> a good idea BTW, there's not much left voice to voice on the board to 
> age or break down other than the electrolytic capacitors (can shaped 
> ones).  Luckily they're really cheap and really easy to un-solder and 
> re-solder.  Good luck.
>
> ------------------------------------------------------------------------
> *From:* "blchrr@..." <blchrr@...>
> *To:* xpantastic@yahoogroups.com
> *Sent:* Friday, January 27, 2012 6:40 PM
> *Subject:* [xpantastic] Re: hello everyone, Xpander problem, help is 
> needed...
>
> Hi Bakis, mine had similiar issues which turned out to be to due to old
> capacitors... its been fine since it was recapped (around 3(ish) years 
> ago)
>
> > hi everyone,
> >
> > new member here, my Name is Bakis.
> >
> > recently bought an Xpander and have the following problem:
> >
> > works and sounds great...  ...apart from voice 5,
> > which, after its shipping to me, does not pass the auto tune test.
> >
> > sometimes the 'PW' section of it fails, sometimes the Res section
> > fails, sometimes all the sections of voice 5 fail (except the vca 
> section of
> > voice 5 that never fails).
> >
> > even if i activate the problematic voice, after its
> > been automatically shut off by the Xpander OS, it sounds a bit 
> different from the
> > others in filter tone and tuning (of course, as it cannot be tuned,) 
> and very very low in volume.
> > another weird thing i noticed: when i direct voice
> > 5 in its 'direct' output 5, then, from this output, i can hear all 
> of the
> > xpander voices (together with voice 5) but very low in volume.
> > all the other direct outputs work as they should,
> > for all the other voices.
> >
> > i performed software reset, re-sitted all ribbon
> > cables and all of the chips in the voice 5 section of the xpander 
> voiceboard
> > without success,
> > i also performed all the tests for the xpander
> > (memory, vmemory, etc...) and all are ok, afaik.
> > plus i re-sitted chip U106 which is responsible for
> > the panning output section of voice 5 (after studying the service
> > manual).
> >
> > also, i swapped both CEM3374 and CEM3372 of voice 5 with another 
> working voice chips (voice 6) and
> > still the fault appears on voice 5. so, both the CEM chips are Not the
> > problem...
> >
> >
> > and i swapped ALL of the chips of voice 5 with
> > the chips of voice 6 and still the same problem appears on voice 5.
> >
> > so ALL the chips in the voice 5 section are ok for sure.
> >
> >
> > and, after hitting tuning many many times and hitting tuning
> > while the machine was at various different presets, i noticed that 
> thing:
> > when the machine was autotuning and it was in a preset
> > that was very complex with lots of modulations and vco modulation as 
> well,
> > then voice 5 failed in the vco tuning as well, (and, at one time, vco 1
> > failed!).
> > when the machine was autotuning, while it was in a simpler
> > sound preset (some brass or synthlead...), then the voice 5 only 
> failed in PWM
> > and maybe Res... but it passed vco tuning....!!
> > so maybe its a problem in another board of the machine
> > (like the CPU) and not in the voice 5 board ?
> >
> > maybe this indicates that i should re-sit the chips in the
> > main CPU /memory board as well?? do you think i should take the time 
> and re-sit
> > all the chips in the CPU board? would it make sense?
> >
> > (do you think a 'HARD Reset' may fix the problem? how do i do
> > this?)
> >
> > is there anything specific i should check?
> > everything seems connected.... i cannot resit ALL the chips in all 
> boards
> > obviously... but maybe i should resit a specific chip from another 
> section of
> > the xpander boards....? any ideas / help?
> >
> > i really do not want to break anything inside the
> > Xpander (i do not want to use a soldering iron, after all, 
> everything seems in
> > place), but i can remove and easily re-sit a specific chip or two, 
> if needed of
> > course....
> >
> > btw, the seller is very honest and he insisted that
> > the machine worked fine (all 6 voices) before shipping, and i believe
> > him..
> >
> > thanks for all your help in advance!
> >
> > best regards,      :-)
> > Bakis.
> >
> >
> > Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
> >
> > [Doepfer_a100] group owner
> >
> > www. parallel - worlds - music. com
> >
> > www. facebook. com/ pages/Parallel-Worlds/192093934136476
> >
> > www. myspace. com/ parallelworldsmusic
> >
> > www. myspace. com/ interconnectedmusic
> >
> > www. myspace. com/ memorygeist
> > www. DiN. org. uk
> > www. musicamaximamagnetica. com
> > www. vu-us. com
>
>
>
>
>