Synthfind

“The Korg PolySix is an amazing early synth dating to 1981. I obtained this model in the 90s from its original owner. It’s a six-note polyphonic analog beast with built-in chorus, phaser and “ensemble” effects. It’s got 32 memory slots for voices, which can be backed up to old-fashioned cassette tape. I believe this is the model they used for “The Final Countdown,” so you KNOW it’s awesome. Tears for Fears also used a PolySix, and so did Keith Emerson (who I’m pretty sure used every synth). This machine has never been on the road, it’s original owner used it for home recording and I used it for taking up space in my basement. Somewhere along the line, it simply stopped working.

This keyboard has some chipping to the woodgrain finish on the edges and corners, and is missing a few of the little buttons on the top. The buttons themselves appear to work, but they’re all sticky.

PolySix keyboards have had some reliability issues in the past, and this one needs to be serviced. It currently does not play. The PolySix has a NiCd batter that needed replacement, and it is unlikely that the one inside this model has ever been replaced, so that might be the issue – it powers up just fine, but no sound comes out. This is being sold “as is” with no returns.

Reverb dot com shows past sales of these ranging between $800 and $2000, with POOR condition examples selling in the $800 range. This one definitely qualifies as POOR; it’s yours for $700 plus shipping, which is a great price if you know how to service these (or know someone who does). This is a truly monster synth, one of the earliest affordable synthesizers.”
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“Here for Sale, I present the Fabulous Korg Poly Six! This is a 6 Oscillator Keyboard that along with the Equally Fabulous Roland Juno 60 (Which I also own) was released in 1981 and turned the world Upside Down!
Sadly, as anyone who is familiar with this Awesome Synth is aware of, it may suddenly just Stop working and No sound comes out of Output jack! And ALL of the LEDs across the Front Panel light up and stay lit (see pics). This is Exactly the case with this one. So, it needs to be serviced. For this reason I am selling “AS IS” with no returns. But, my outstanding Seller Rating (100%) on OVER 327 Sales! With a TOP SELLER Purple Star should alleviate any concerns on duplicity here.

Some of these keyboards have had an issue in the past where the little Blue battery needs to be replaced before it gives out and Damages or completely destroys the PC Board it is mounted on. This is NOT the case with this one. I have owned it for many years and NEVER had an issue with the Battery! Please, observe all pictures that show the boards and everything else to be spotlessly clean with no trace of any battery leakage. I suspect this infamous ‘battery Issue’ only applied to certain Serial Numbers?

Many of these ‘sick’ Poly 6 Keyboards have had sales in the past (and recently!) between $600 and $800, as they are Very sought after Even in POOR condition to replace Boards, Parts, Chassis, etc…on Working or semi-working ones…This one should NOT qualify as a Poor Condition Unit since apart from it suddenly, mysteriously having stopped working it still appears to be in Very GOOD Condition! It should be a Bargain for any ‘Home Techs’ out there who know how to service these. Thus, I am setting the Opening Price accordingly.

Please, note that being a ‘Go Getter’ / ‘Do it Yourselfer’ I first tried replacing the Battery with a Battery of Same brand and Voltage but a little more capacity but, that did NOT resolve the issue (I will be providing this battery as well as original battery). Then I noticed one of the 8 pin ICs seemed to be in poor shape (blackened legs?) So, I ordered a pair of replacements (sn74ls75n) But, only changed one since that also did not alleviate the issue. (I will provide the original chip plus the other 2 New ones) Then I tried replacing the CPU with a New one but, that also did not help (I will also be providing the New CPU as well as the original CPU). The CPU replacement was by far the easiest since the poly six originally came from the factory with the CPU already mounted on a Blue Plastic Socket. 🙂
I am providing all of these details to help anyone who purchases this in his/her repair work.

Please, note, there is Nothing Missing on Keyboard : All Knobs, Pots, Switches, PC Boards etc, are present.
Note also that I am a Home Musician and so have Never Gigged with this keyboards thus, it has No Road Wear such as Dents, Scratches, Dings, Cigarette Burns, Whiskey Spills, etc… ( 🙂 ) I also do Not smoke, Drink or own any pets, etc… ”
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“Korg Polysix Synthesizer. This is the one you’ve been waiting for! Excellent cosmetic condition, excellent functionality. All functions work as they should, all knobs turn smoothly, all buttons respond easily, all keys trigger as they should. The battery has been replaced with a CR2032 socket type battery and holder so that in the future, probably way out into the future, the battery will be very easy to change without having to solder. There are a few tiny scratches here and there and there is slight damage to the very corner of the wood sides. The circuit boards are clean. This keyboard was fully serviced recently and it shows in how it plays, sounds and responds.”
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