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)
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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
