Crumar Musical Instruments User Group.

Hi,

sorry to bother with this again. But if anyone of you would know anything that might help in this topic i would be extremely grateful.

Like where to get schematics for Bit-01 or any idea about what capacitors to replace from which circuit board?

.ja



--- In crumar@yahoogroups.com, "a33e" <dr.3.tri@...> wrote:
>
> 
> 
> --- In crumar@yahoogroups.com, Justin Maxwell <soc@> wrote:
> >
> > Thanks, Michael!  Can anyone share the schematics that were floating  
> > around here last month?
> > 
> > On Mar 16, 2007, at 8:52 AM, Michael Ashton wrote:
> > 
> > > Almost certainly a decoupling cap -- I forget exactly where they  
> > > are but I replaced all six on my Bit 01. Recommend you do the same  
> > > --mpa
> >
> 
> 
> Hi. I would be interested to hear that sound example ( http://code404.com/CrumarProblems.mp3 ) but it's not there anymore..
> 
> I have Crumar Bit-01 with one dead or more like very silent voice. It's also third one so if that Justins Bit-01 ever got repaired i would be gratefull of any advice what to do with it.
> 
> What i have done so far is that i tried to swap filter chips to different slots to see if it has any effect -it did not. Nothing changed.
> 
> I made many tests like one as example when i removed all filter chips except first. Then of course it had only one working sound.
> After that i replaced that 1st. chip with the one from slot 3. It worked perfectly again as one voice synth like it should of course. I found out that way that all chips were working a OK.
> 
> I still did not trust my self and bought one from EBAY. It also worked but did not fix 3rd. voice problem.
> 
> Then i bought few LM13700N chips (they were cheap at least) and replaced all three -again with no anykind of effect on problem.
> 
> I have TL082 chips too but somehow i suspect that replacing those is useless as well.
> 
> Could you or anyone give a clue what capacitors could have this effect or if it is wise to replace them all?
> 
> Someone on another forum suggested that idea. Said that it removed doubts that some other cap would fry also soon after replacing faulty one -and that replacing them all would also made soundquality better.. .  .
> 
> Before i start to randomly replace those caps i thought that i ask from this forum if somebody would know exactly what this all about.
> 
> .a33e
>