On the KLM 367 between some specific chips? I started checking resistance
from the 14051s on the panel boards to the processor on the 367 board to
verify A,B,C,INH1,INH2 getting through CN11 okay. It looks good.
Don B.
_____
From:
PolySix@yahoogroups.com [mailto:
PolySix@yahoogroups.com] On Behalf Of
Andrew Jury
Sent: Sunday, January 17, 2010 8:10 AM
To:
PolySix@yahoogroups.comSubject: Re: [PolySix] Wrong functions controlled by knobs?
Ah, sorry Don, I misread that in a hurry, I thought you were setting up the
a/d converter. If only Leds 1-5 light then pay special attention to bits DO5
thru DO7!
Let us know how you get on.
Andy
On 17/01/2010 12:57, "backshall1 (dsl)" <backshall1@bellsout
<mailto:backshall1%40bellsouth.net> h.net> wrote:
> Hi Andy,
> I'll check out the data bus and inhibits. No, the calibration did not go
> well. LEDs 1 and 8 are supposed to light up, and I could only get 1 and 5.
> Thanks,
> Don B.
>
> _____
>
> From: PolySix@yahoogroups <mailto:PolySix%40yahoogroups.com> .com
[mailto:PolySix@yahoogroups <mailto:PolySix%40yahoogroups.com> .com] On
Behalf Of
> Andrew Jury
> Sent: Sunday, January 17, 2010 7:35 AM
> To: PolySix@yahoogroups <mailto:PolySix%40yahoogroups.com> .com
> Subject: Re: [PolySix] Wrong functions controlled by knobs?
>
>
>
>
> Hi Don,
>
> You almost certainly have track disconnections. Try and focus in on two
> places of the �367. First the data bus DO0-DO7 and the multiplex address
bus
> INH1-3. Using your scope scope ensure that you have at least what look
like
> �trains� of data pulse when you operate the controls. I find when dealing
> with multiple problems like this it pays to select one of the problems and
> focus in on it. Usually everything else will start to become apparent as
you
> make progress. Before you start, however, are you able to perform the
reset
> calibration procedure correctly? If you can verify this then we can
proceed!
>
> Cheers,
> Andy
>
> On 16/01/2010 13:56, "longenough2002" <backshall1@bellsout
> <mailto:backshall1%40bellsouth.net> h.net> wrote:
>
>>
>>
>>
>>
>>
>> Just got a Polysix in with some bizarre symptoms. It had an old battery
>> in it that looked like it had just started to leak. Only a couple of
>> traces had some black spots and still checked out okay with an ohmmeter.
>> I put in a cr2032 and diode and it is saving patches okay. It's not
>> until I twiddle some knobs that things start to get weird. Here is what
>> works: Output, Bend, Tune, VCO, VCA, Arpeggiator, Key Assign, Programmer
>> sections all OK. Problem sections: MG, VCF, EG, Effects. By Section: MG
>> - Frequency, Delay and Mod work, but Level seems to be controlling VCF
>> Cutoff, not modulation intensity. VCF - Cutoff does nothing, Resonance
>> works when set between 5 and 10, but seems to control Attack when set
>> between 0 and 5, EG Intensity does nothing, KBD Track works. EG - Attack
>> does nothing, Decay works, but in reverse, as if EG Intensity is in the
>> negative range. Release works between 5 and 10 but seems to do nothing
>> between 0 and 5. Effects - switch works, but Intensity does nothing.
>> It would seem the D/A is having serious problems, and I can't get LEDs 1
>> and 8 to light up during the reset procedure. I get 1 and 5. I wish the
>> service manual had some voltages to measure, instead of just watching
>> lights. The +/-15 and +/-5v supplies look good. Anybody have ideas where
>> to start debugging this? I have a scope and multimeter, but no logic
>> analyzer. Thanks for any assistance you can provide. Don B.
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>>
>>
>
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>
>
>
>
>
>
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>
> ------------------------------------
>
> PolySix "Digiest" Page: http://www.acc
<
http://www.acc.umu.se/~amber/Poly6Yahoo> umu.se/~amber/Poly6Yahoo! Groups
Links
>
>
>
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