Hi!
Finnaly I managed to repair it! It was just a track that I cut
accedentally and was under a printed number on the board (it was
almost impossible to see it)
Now I've got another problem. The synth sounds ok, it stores the
presets and so on, but it seems to be a problem with the modulation
section that it doesn't had before I managed to change the battery.
What happens is: when i switch the P6 on the LFO led starts flashing
faster and faster and every change of the pots doesn't affect to it.
Did you encounter this problem before? I've tried to do the Modulation
adjustment but the VR changes doesn't seem to affect to the signal
that is delivered to CN03-5. Well, I'm doing it with a digital
voltimeter which stands to measure Hz, but maybe that's not a good way...
any idea?
Thank you in advance.
--- In PolySix@yahoogroups.com, "choco" <ignaciojimenez@...> wrote:
>
> Hi-
>
> Thank you for your fast and kind reply.
>
> I have visited your website several times when doing research for my
> P6 and I had you in mind as an option if I couldn't work it out. My
> synth comes from the states and I was bothered about sending it back,
> but I've never thought before about sending just the board. It's a
> great option.
>
> I'll check one more time that traces and maybe I will re-solder them
> and the socket more accurately just for testing.
>
> Probably I will contact you in a week if I can't arrange to repair it.
>
> And maybe I'll think about getting a scope.
>
> Thank you!
>
> --- In PolySix@yahoogroups.com, klosmon <klosmon@> wrote:
> >
> > Hello-
> > Having repaired many of these, I would suggest that the most likely
> > cause is damaged traces due to the battery leak.
> > Even if the board looks good, the traces around IC31 (which you
> > replaced) are VERY delicate, and carry data lines that, if damaged,
> > effect all of the functions of the synth.
> >
> > If you have any experience with electronics, get hold of the
schematic
> > and use a continuity tester to test all traces from that IC; if you
> > have a scope, that's even faster.
> >
> > If not, you can send me the CPU board & I can look it over for you.
> >
> > ~GMM
> > analogsynthervice.com
> >
> >
> > choco wrote:
> > >
> > > Hi!
> > >
> > > After digging within the messages I haven't found any similar
> > > situation, so I decided to post.
> > >
> > > I bought a year ago and old polysix and it sounded fine to me (maybe
> > > lower than expected, I use it with an old guitar tube amp and I have
> > > to select the high output with master at 12 o'clock to get it at
> > > almost the same level as the guitar is)
> > >
> > > A mounth ago I noticed that I had lost all my patches (although
it was
> > > sounding great and every pot worked fine). I did know about the
> > > battery issues, but it hadn't worried me until that moment. I opened
> > > the polysix and noticed that the battery mounting clamps were broken
> > > and the batery was not feeding the klm367A anymore.
> > >
> > > Well, it had leaked a little bit, but the circuit was almost perfect
> > > and there were no signs of corrosion elsewhere. I cleaned all the
> > > board with alcohol and care, replaced the battery and the 74LS08N
> > > which is next to it just for security and then I made a mistake.
> > >
> > > I broke a trace and shorted accidentaly 5V and ground.
> > >
> > > After testing and noticing what the matter was, I removed that
mistake
> > > and everything seemed to work fine (the leds and so on), but when I
> > > pluged the P6 to an amp (to the earphones too), I noticed that it
> > > sounded weak and something like distorted. almost every pot didn't
> > > affect as expected.
> > >
> > > Do you have any idea of what can happen to my beloved P6?Any measure
> > > that I could take from it to get deeper into? Unfortunately I don't
> > > have an osciloscope to take accurate measures...
> > >
> > > I also had a problem with 15Volt line, all the LEDs were ON when
> > > starting up the P6, but never went OFF. In addition to it, the
> > > Modulation LFO LED started blinking every time faster and faster
until
> > > it seemed to be just static ON. I solved it regulating the 15V
pot to
> > > get over 15.05 on my meter.
> > >
> > > I will continue testing it, but it seems that I have reached my best
> > > effort in front of it, and here in Spain it's almost impossible
> > > finding a qualified vintage synth tech.
> > >
> > > Thank you in advance.
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>