| previous by date | index | next by date |
| previous in topic | topic list | next in topic |
It is normal for the Polysix to beextremely out of tune for the first few seconds after it is powered on. Iworked on one that seemed reasonably in tune after about 5 seconds, and anotherthat took almost 30 seconds before it sounded decent. I believe that would becaused by the thermistors warming up, not an optocoupler problem. Do the LEDsbehave any differently if the keyboard is unplugged from the 366 board?
Don B.
From:PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of Frank Carvalho
Sent: Tuesday, November 19, 20136:27 PM
To: PolySix@yahoogroups.com
Subject: Re: [PolySix] Weirdassigner issue
No, something is wrong. It freaked while opening it up. After Iunscrewed the keyboard it got better, and seemed to act normal, with all6 Leds coming on. But suddenly it jumps back into freak mode, where only Leds1-4 light up. Here the missing keys are F1, F1#, C2#, D2 etc.
I can get it out of freak mode by switching it off and on, but it willfall back into failure.
Btw, the optocoupler struggles initially to get the synth into tune.Could it be straining something?
(Maybe I should get a VTL5C9 instead)?
Frank
Sendt fra Samsung mobil
-------- Oprindelig meddelelse --------
Fra: Frank Carvalho <dko4342@vip.cybercity.dk>
Dato:
Til: PolySix@yahoogroups.com
Emne: Re: [PolySix] Weird assigner issue
Hi Johannes
Ok, so I turned it on to do the checks you mentioned, and everything nowsounded normal again! But after a few notes, it started to get weird again, andthen went back to normal. Tapping lightly on the left side of the panel revealsthat I have a bad connection somewhere.
I have to open the synth again, and check for bad connections. Maybe a badsoldering, as I recently replaced the optocoupler. Fortunately, I have to say.That means that there is probably nothing fundamentally wrong with it. I'll seeif I can find the culprit.
Thanks so far
Frank On 11/18/2013 11:16 PM, Johannes Hausensteiner wrote:
OK, sothe keys that do not work are F#1, G1, D2, D#2, A#2, B2, F#3, G3,
D4, D#4, A#4, B4, F#5, and G5, correct?
When starting the arpeggiator (besides playing wrong notes) does it
light the small voice-LEDs on KLM-366?
When connecting a footswitch to the CHORD MEM footswitch jack, does the
CHORD MEM button LED work as expected (can be switched on and off by
footswitch)? Note: if you do not have a footswitch you can you a normal
phone cable and short the tip to the sleeve on the far end connector
with a paperclip or similar for a test.
And the HOLD button works?
From the noworking keys I would say the lines P16 and P17 are not
working correctly. But the buttons and the VCO control voltage should
work OK...
Try: disconnect CN12 from KLM-366 (this goes to KLM-371). Are the notes
in tune?
Johannes
On 18.11.2013 19:15, Frank Carvalho wrote:
>
>
> Poly/Chord/Uni do not seem to have any effect, and the LEDs don't come on.
> Hold is on when the synth is turned on, but can be turned off and on.
> Hold now lights up.
> If the keys are numbered repeatedly with 1 to 8, beginning with the
> lowest key, then it is every number 6 and 7 that is off.
> The arpeggiator sends repeated trig signals, but as the same note sounds
> every time, I cannot hear anything but the repetition. Actually the
> sound is much like a detuned unison mode.
>
> And, yes, I have an ancient Philips oscilloscope, if necessary.
>
> I certainly hope I can fix it. I love this synth.
>
> Oh, before anyone asks, I did the battery mod long ago, before any leaks
> occurred.
>
> Thanks
>
> /Frank
>
> On 11/18/2013 09:09 AM, Johannes Hausensteiner wrote:
>>
>> The issue is related to the KLM-366 Key Assigner CPU circuitry.Probably
>> two of the I/O lines are dead (remember, it is an 8bit CPU).
>> Which keys do work and which don't?
>> Do the key assigner buttons (POLY/UNI/CHORD/HOLD/ARP) work?
>> Does the arpeggiator don anything?
>>
>> Do you have access to an oscilloscope?
>>
>> This surely can be fixed!
>>
>> Johannes
>>
>
>
>