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So what have I tried now: I tried the reset adjust of the KLM-367 with plugging in a 56K ohm resistor and turning VR1 on KLM-367. It made some constant hissing noise when I turned VR1 counter-clockwise. But otherwise it made no change. I then replaced IC's: IC30, IC26, IC34 (IC31 was already...

Thanks!

Hi Fanwander, no I am only discussing it here. But would like to see the other issue? And I just realized that you are the one behind http://www.florian-anwander.de - great site and projects you have! Thanks for helping me out!

I agree I am in the process of exchanging the bad ones and some potential bad IC's. My approach is not random but not highly scientific either :) I am replacing IC's: IC30, IC26, IC34 (IC31 was already changed in relation to batteryrepair) and suspicius ceramic capacitors. I have chosen these...

Hi MacroDX and Sequencer.de Thanks for the trust you put in me :) Yeah, not what I had hoped for :) The battery damage on my Polysix was very light. I have cleaned it with vinegar and demineralized water and alcohol. But yes, I agree the sensible thing to do would be to grab a new replacement...

But dont you think that it is more likely that I either messed something up - or the fix of the memory-chip exposed a new error? I had it functioning with the exception of long-time-memory (it lost patches after some hours). New PCB is tempting, but I am considering changing the 4000-series IC's...

No, it boots up into the same state no matter what I do...

An update from me: I finally got a new replacement memory-chip and replaced it in the Polysix (and put in a socket). I then turned on the synth and it made sound and I was able to alter the sounds and so on. I then went on to test the memory by loading in patches from TAPE, so I put the synth in...

It's a fairly easy thing to try so I have ordered a new one :-)

Hi Binary Tubes and MacroDX, yes MacroDX is correct my only remaining issue is the synth not being able to persist patches for a longer period of time. I do not know yet how long, but more than 1 hour and less than a 24 hours. The voltage on the memory chip is 2.9Volts. The coincell battery is...

Hi MacroDX, well no, I am not done yet :/ The voltage on the memory chip is still 2.9V but now after about 7 hours idle the sounds are reset... I am inclined to buy a new memory-chip and see if that will fix it. But I should probably go through the traces again and see if there is a loose...

Yes, I would think so, but I will do some additional cleaning and I haven't fully checked everything...

Well, I checked my battery replacement and reinserted the battery and it actually measures 2.9V over IC32/18 (VDD) to IC32/9 (GND). I have reloaded the presets sounds to the (through tape) and after turning the synth off and on they are still there. Will check if they are still there when I get...

Hi MacroDX, hmm no... I have absolutely zero volts when I meassure from IC32/18 (VDD) to IC32/9 (GND). Thanks! Better check my battery replacement as you suggest!

Yesterday I started to wonder what it might be that start the arpeggiator constantly and I then I thought of the keyboard. I new that it had a few bad keys but had postponed that to the thorough cleaning when everything worked. I tried unplugging the keyboard and the synth started without the...

Hallo, danke für ihren hilfe! Ich bin der Däne mit Polysix probleme :) Ich will im english schreiben als mein deutsch ist schlecht :/ I bought the Polysix knowing that it had a battery-problem. I regard the battery-problem rather mild. The corrosion hadn't travelled through the connectors and...