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Discussion about the Korg PolySix synthesizer

Archive for polysix.

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Polysix frying mixer channels

2018-08-30 by Peter Foley

I have a Polysix that seemed to fry a few channels on an old mixer. I know that this synth works (for the most part) - it boots up fine and produces sound,

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Re: [PolySix] checking connections

2018-07-16 by <backshall1@bellsouth.net>

I absolutely agree with this. A lot of the bad traces on the board just look like they go to a “via” that goes through the board to the other side. Unless

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checking connections

2018-07-16 by Bob Grieb

When checking for continuity of questionable traces, IMO it s best to figure out which pins of which IC s are being connected by the suspect trace. Then use

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Tuning oscillator

2018-06-30 by mpe1969@tpg.com.au

HI there, I tuned my poly after leaving it on for about ten minutes. When I now turn the unit on I have one oscillator that is always sharp in pitch for about

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Filter cutoff not working. Thermistor?

2018-06-24 by anthony.putzier@gmail.com

I am in the middle of restoring a p6 I aquired recently and have been unable to troubleshoot the cutoff not working. Nothing effects the cutoff (EG, KBD trk,

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Re: [PolySix] Tuning issue

2018-06-14 by jamiepaterson@hotmail.com

Thanks for the quick reply Don! That was my initial thought so I double checked the position of both the pitch wheel and the master tune knob, and both were

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Distortion on voice 5?

2018-06-12 by Peter Foley

For some reason, I am experiencing what sounds like distortion on voice 5 of a Polysix. I tried swapping the SSM chips with the adjacent channel and the

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Re: [PolySix] Tuning issue

2018-06-10 by <backshall1@bellsouth.net>

I hate to state the obvious, but don’t forget that the Polysix has a mod wheel without a spring. You need to make sure it is centered. Also make sure the

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Tuning issue

2018-06-10 by jamiepaterson@hotmail.com

Hi guys, new to the group and still trying to navigate my way around... I ve done a search, but couldn t find an answer to my problem, so apologies if it s

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fixing pc board cracks

2018-06-06 by Bob Grieb

I would say that depends on the situation. If the board holds switches, flexible jumpers won t provide any rigidity as the switches are pressed or moved. If

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Re: [PolySix] Re: Dead Keys are Stuck in Arp

2018-06-06 by <backshall1@bellsouth.net>

Just solder alone over a broken trace is not sturdy or stable. Follow Bob’s suggestion and lay a piece of bare wire over the break and solder it on. Don B

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Re: polysix effect issue

2018-06-05 by mpe1969@tpg.com.au

Super, thanks Bob I will check it out. I ve tested the synth again tonight and all is good. Once again thanks.

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Re: [PolySix] Re: polysix effect issue

2018-06-04 by <backshall1@bellsouth.net>

I don’t know whether the coupling between traces on the board is conductive or inductive/capacitive after battery damage, but it certainly is real and can be

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Re: polysix effect issue

2018-06-04 by mpe1969@tpg.com.au

Thanks for the advice. Firstly I tested this board again in a working polysix and the volume was still an issue (therefore it had to be on the elm 368 effects

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Re: [PolySix] Re: polysix effect issue

2018-06-03 by Florian Anwander

To be honest: I don t like this blind guessing (Its like I have an ache in the breast - yeah, my gradfather was wounded in worldwar two; the wound made him

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[PolySix] Re: polysix effect issue

2018-06-03 by Malte Rogacki

First thing is to check to effects board for acid damage. I ve seen this several times. Since the connector is located close to the battery on the KLM367 any

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Re: polysix effect issue

2018-06-03 by mpe1969@tpg.com.au

I ve done some tests today, but still haven t figured it out. I have traced the audio signal to pin 9 of ic15. At this point the speed potentiometer does not

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Re: polysix effect issue

2018-06-03 by mpe1969@tpg.com.au

I ve just tested the effect board in another polysix. It does the same thing (volume drop). So the problem must be on the effect board.

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Re: [PolySix] polysix effect issue

2018-06-02 by <backshall1@bellsouth.net>

If you have access to another Polysix, have you tried testing your effects board KLM-368 in the other Polysix? Don Backshall From: mpe1969@tpg.com.au [PolySix]

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polysix effect issue

2018-06-02 by mpe1969@tpg.com.au

Hi there, I have an issue with my polysix. The effect speed intensity potentiometer also seems to alter the volume of the synth. I have tested my klm367 board

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Re: [PolySix] LFO bleed KLM-367a

2018-05-27 by Nekoma

Hi , Try to check the strange Transistor with 4 pin ( it is a double transistor ) Or try to well Check the board connectors that get signal to and from the

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LFO bleed KLM-367a

2018-05-23 by Peter Foley

Hi all, I put in a new KLM-367a from Jed Jorgensen and for some reason I get a very slight LFO bleed (otherwise, everything else seems to work). Any ideas?

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Re: [PolySix] Tuning problem

2018-05-16 by moogchild synthdrome

I have for sale direct replacements for the Polysix optocoupler, price is 36€ worldwide shipping included buying it directly outside ebay. You can contact me

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Re: [PolySix] Tuning problem

2018-05-16 by Peter Foley

I think that some tuning weirdness can happen if the optocoupler is bad - I would check that. The KiwiSix manual describes how a bad optocoupler would behave.

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Re: [PolySix] Tuning problem

2018-05-08 by Malte Rogacki

Just to make sure before thinking further: You re holding a note and then turn off the Chorus: The pitch of the held note changes. You re holding a note and

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Re: "Bleed" and grounding

2018-04-26 by jw_dewdney@yahoo.com

if a direct induced current into the output - but it can also dump AC into other circuits and create all manner of unintended effects depending on where it

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Re: Tunning

2018-04-26 by daviddemontis@btinternet.com

Hi Florian Thanks for the suggestion. ICs 31 and 24 both have sockets on them so someone changed them in the past. I fitted new 4051s into the sockets but I`m

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Re: Dead Keys are Stuck in Arp

2018-04-20 by jhatzia@gmail.com

Thank you everyone for all the input. I will be addressing the dead keys that have no relation to the stuck notes in the arp last. The screws are missing

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Re: Dead Keys are Stuck in Arp

2018-04-20 by backshall1@bellsouth.net

The delays in these messages are hilarious. My first reply by email was sent at 8:37 pm EDT. It showed up on the web page maybe an hour later. Even the message

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Re: Dead Keys are Stuck in Arp

2018-04-20 by jhatzia@gmail.com

And sure enough it s back in a stuck state and those same keys aren t responding.. So odd. So here s what I ve discovered. -When I first got the synth some

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Re: Dead Keys are Stuck in Arp

2018-04-20 by jhatzia@gmail.com

Thank you Don- you really nailed describing my situation. I m working on it again now. And was trying to reply to your comment to get a new description on the

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