hi list,

 

so, i found a bought a USA model Xpander.

 

works and sounds great...  ...apart from voice 5, which, after its shipping to me, does not pass the auto tune test.

 

sometimes the 'PW' ('pulse width', not 'parallel worlds'... ok, silly joke...) section of it fails, sometimes the Res section fails, sometimes all the section of voice 5 fail (except the vca section of voice 5 that never fails).

 

clearly seems there is something wrong with voice 5.   :D

 

even if i activate the problematic voice, after its been automaticaly 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 resitted chip U106 which is responsible for the panning output section of voice 5 (after studying the service manual).

 

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, after re-sitting the CEM 3374 Dual vco, of voice 5, the vco tuning of voice 5 almost always fails... it did not do that before.

but i am very very certain i removed and resitted the chip without making any damage to it or its socket.

(i have replaced chips in other analogue modules before without any problems...)

 

btw, the seller is very honest and he insisted that the machine worked fine (all 6 vooices) before shipping, and i believe him...

 

thanks in advance for your help!

 

best regards,

Bakis.

 

Bakis Sirros

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