Hi.
I've checked tha traces and seemed to be ok, but accidentaly I found
something that I didn't understand.
The D00 (CN06-3) seems to be connected to the +3.6 pin of the battery
(and to the new diode which replaced the resistor there), and also to
the D15 anode (which is really close to that trace). I removed the new
diode and soldered it to the battery old soldering point which was not
used and goes through the other side of the board. I cut the trace
which connected the battery to the old resistor just for checking, but
the connection was still there.
Does it make any sense to you? The tracks and the board seem to be in
good condition and the battery didn't almost leak when I replaced it,
but it sounds to me that the board could be conductive or something
like that.
I just wanted to ask you before cutting all the traces on the board...
Maybe tomorrow I will try to remove all the D00 traces and make cable
connections.
Thank you!
--- In PolySix@yahoogroups.com, klosmon <klosmon@...> wrote:
>
> Most likely cause is another bad trace.
> Check all the traces to CN06 (D00 - D03; P10 - P13).
> Also keep in mind that these signals each have to connect to several
> points on the board (for example, D00 connects to IC31-6, IC26-4,
> CN06-3, IC28-4, IC34-4, etc etc).
>
> ~G
>
> choco wrote:
> >
> > 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 <mailto:PolySix%40yahoogroups.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 <mailto:PolySix%40yahoogroups.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]
> > > >
> > >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>