Korg Poly 61 Project Machine

“Korg Poly 61 Programmable Polyphonic Synthesizer/Keyboard! For Parts! Once the Keyboard is plugged in it turns on however it is missing Joystick(see pictures for more details) it has some cosmetic wear on the cabinet dings and scratches! One of the key has a broken piece on the bottom. Made in Japan Vtg Korg Professional Keyboard! ”
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Korg Poly 61

“Korg Poly 61 Polyphonic Synthesizer Fully Working With MIDI & CPU Board Upgrade

This is a 1981 Korg Poly 61 Polyphonic analogue synthesizer. This item is fully working with some upgrades. The unit has a brand new CPU board known as the cKLM-509A. This is a brand new, high quality, exact clone board of the old CPU board which was prone to failure. The other upgrade is added MIDI-IN function. You can noticed the daughter board on the last image and the MIDI-IN socket on the back. This synthesizer didn’t come with MIDI when it was first made. All key contacts have been cleaned and recoated. All keys and functions work. The exterior does have some blemishes please see images.
The only fault is the joystick. The joystick function works but in the up-down direction gets kind of stuck. Not sure if it needs lubrication. Also comes with a printed owner’s manual.” Click here to visit listing on eBay

Korg Poly-61M

” I bought this Synthesizer on Estate Sale.Good cosmetic condition.Has some light damage on the corner(see photos).Over all looks great.When the power on has some light on(previous owner told me this unit needs new battery(around $25). But I am not professional.Sale As Is and final no return.”
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Korg Poly 61

“This is a fully functioning Korg Poly 61. I had it serviced by Belltone Synthworks in PA, so the battery and key contacts have been replaced. There is some wear on the end panels, but that is part of being 30+ years old sometimes.” Click here to visit listing on eBay

Korg Poly-61M

“Korg Poly-61M MIDI Synthesizer. Serviced and with NEW CPU board installed.

This is the original Korg Poly-61M, a great sounding polysynth with the factory MIDI. Poly61 are known for many developed defects, the most dangerous is a backup battery leak which destroys the CPU memory. The original battery was replaced, several years ago, however the acid leak continued to develop and destroy traces and joints until one day it stopped working completely. At that point, it became obvious it can be worse in the future, and the new CPU board was installed a month ago. This is newly manufactured board from Synthronics in Germany. So, the lesson here – never trust somebody who replaced the battery because original battery leaked already, with 99% chance it will fail anyway.

The second problem of all Poly61 is connectors. Connectors and cables get oxidized over a time and no longer can work reliably even after you clean them. They simply no longer hold the contact. This synth has all problematic connectors replaced (all cables in black on photo are new wires).

And finally power supply was serviced with premium Nichicon original audio grade caps.

Everything else is untouched. Original buttons, pots and keys work. The overall condition is very clean. It comes with the original case where it was stored the most of its life. It hasn’t been used much at all. The proof of all work is on photos. ” Click here to visit listing on eBay

Korg Poly 61-M

“Korg Poly-61M MIDI Synthesizer. Serviced and with NEW CPU board installed.

This is the original Korg Poly-61M, a great sounding polysynth with the factory MIDI. Poly61 are known for many developed defects, the most dangerous is a backup battery leak which destroys the CPU memory. The original battery was replaced, several years ago, however the acid leak continued to develop and destroy traces and joints until one day it stopped working completely. At that point, it became obvious it can be worse in the future, and the new CPU board was installed a month ago. This is newly manufactured board from Synthronics in Germany. So, the lesson here – never trust somebody who replaced the battery because original battery leaked already, with 99% chance it will fail anyway.

The second problem of all Poly61 is connectors. Connectors and cables get oxidized over a time and no longer can work reliably even after you clean them. They simply no longer hold the contact. This synth has all problematic connectors replaced (all cables in black on photo are new wires).

And finally power supply was serviced with premium Nichicon original audio grade caps.

Everything else is untouched. Original buttons, pots and keys work. The overall condition is very clean. It comes with the original case where it was stored the most of its life. It hasn’t been used much at all. The proof of all work is on photos.” Click here to visit listing on eBay

Korg Poly 61

“Korg Poly61 Vintage Analogue Synthesiser.

Working but has some issues which I’m told are an easy fix.

1. Bottom F key is sometimes sticking

2. Outout jack volume low but headphone socket to amp is fine

3. Number 1 section key needs a good jab. Needs a clean I think.

This synth just sounds so great. I think a good clean up and restore and it will be a beauty.”
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Korg Poly 61

” Korg Poly61 from 80’s.Great sounding synth,gaining more followers last year or two as most decent analogues these days are exorbitantly priced.
In pretty good condition for it’s age,just the odd scratch-otherwise good for it’s age,had a new battery put in a year ago,and all keys work too.
Would prefer collection as these boards are big.” Click here to visit listing on eBay

Korg Poly 61

“Collection only, I’m not risking this beauty getting smashed to bits in the post.
Korg Poly 61, works perfectly, in really nice cosmetic condition, all voices work, battery has been changed with new battery and moved away from circuit board, there has never been any battery acid corrosion etc, all buttons work fine, MIDI kit installed that has a MIDI in connection (The MIDI port is connected to a MIDI cable that you can plug into your DAW/MIDI out etc).

A Poly 61 with a MIDI in port is brilliant and makes it infinitely more fun than a standard Poly 61.

If you have lusted after a Poly 61 the this is the one – This model here looks great, sounds great and the MIDI in is the cherry on the cake.”

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Korg Poly 61

” Korg Poly-61 vintage analog synthesizer with EU voltage, 220V, so external stepup converter 110v to 220v required for use in the US (this is the one I use). The sound from the device is great but there is an issue with some sticking/dead keys (see video linked below). I believe this is a common issue with old Korg synths and from what I have read is fixable though I have not attempted to repair it myself.” Click here to visit listing on eBay

Korg Poly-61M

“This 61M has recently been serviced and comes in a beautiful, brand new walnut chassis. New battery, new switches, cleaned keyboard contacts. Plays and sounds great. Cosmetically the synth is near perfect with only a few very small, hardly noticeable scuffs. I would gladly make a video demonstrating that everything functions as it should, but I will not accept returns due to the sometimes unreliable nature of 40 year old synths.” Click here to visit listing on eBay

Korg Poly 61

” Korg Poly61 Midi for parts or repair.
Turns on,display shows some numbers and some scrambled
infos.
Makes sound,many function operates but does not trigger properly,
midi works.
Unit motherboard was damaged by the usual battery leak,
it has been repaired a few times throughout the years,it was working properly until
recently but it seems acid is still doing its job hence the current issues.
I don’t want to have to have it fixed again and again so I’m selling it for parts only.
PSU delivers correct +15 -15 5
No return
Please see the video showing the issue before buying.
Battery has been removed to stop leak but never replaced so sounds need to be reloaded
via tape input for someone willing to do the repair however currently sounds can partially be programmed has shown in
the video.
For parts or repair,not functionning item ,no return.” Click here to visit listing on eBay

Korg Poly 61 with MIDI

“Vintage Korg Poly 61 for sale. It has had MIDI installed.

Very good condition considering the age.

Just serviced this month to clean up a common issue for these units with leaky batteries. Cleaned up, tested, and in great condition, ready to go. Happy to furnish the $180 service invoice if desired.”
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Korg Poly-61M

” Korg Poly-61M completely refurbished, new oak chassis, new switches, Beautiful !

This synth was in very good condition, even before I refurbed it. I just wanted to create the best possible P-61M I could. It has never had a battery leakage, although I have updated the battery to a modern 3.6V lithium coin battery (2032) with an easy access battery holder. I refurbished the keyboard, cleaning it thoroughly piece by piece, and after polishing all the contacts, I applied the little carbon discs to each contact, as seen at sounddoctorin.com. It’s a brilliant fix, so now the keys play like new. Then I replaced all the program buttons’ switches with brand new ones, which fixes the annoying problem of not getting the buttons to work properly. Now, they are perfect. See the photo of the switch board with new (blue) switches. Then I built a brand new solid oak chassis for the synth, so as you can see, it is gorgeous, and now more solid than new. It was finished with a Satin Ebony polyurethane that goes very well with the gray panel. All pots lubricated, new knobs, all bolts and inserts for the chassis are new, and new rubber feet. Nothing is missing.” Click here to visit listing on eBay

Korg Poly 61

” This was Korg’s follow up to the now classic Polysix synthesizer and it if very similar. I just do not have time for anymore repairs / projects. It could possibly be an easy fix for someone that works on these. Notes are being held for some reason. Not sure of the battery works or not but I think it is a working replacement. It seems like everything else is working and it sure sounds great. Check out the little demo video.” Click here to visit listing on eBay

Korg Poly 61

“Korg Poly-61M completely refurbished, new oak chassis, new switches, Beautiful !

This synth was in very good condition, even before I refurbed it. I just wanted to create the best possible P-61M I could. It has never had a battery leakage, although I have updated the battery to a modern 3.6V lithium coin battery (2032) with an easy access battery holder. I refurbished the keyboard, cleaning it thoroughly piece by piece, and after polishing all the contacts, I applied the little carbon discs to each contact, as seen at sounddoctorin.com. It’s a brilliant fix, so now the keys play like new. Then I replaced all the program buttons’ switches with brand new ones, which fixes the annoying problem of not getting the buttons to work properly. Now, they are perfect. See the photo of the switch board with new (blue) switches. Then I built a brand new solid oak chassis for the synth, so as you can see, it is gorgeous, and now more solid than new. It was finished with a Satin Ebony polyurethane that goes very well with the gray panel. All pots lubricated, new knobs, all bolts and inserts for the chassis are new, and new rubber feet. Nothing is missing.” Click here to visit listing on eBay

Korg Poly 61

“Korg Poly-61, had the leaky battery problem. Battery board is pretty rotten. Has been cleaned up some, but still not working very well. Powers on and can play some strange sounding patches. Doesn’t let you edit the patches, doesn’t let you transfer in new ones from tape. Joystick is partially working. Very scratchy volume knob. Sold as is, no returns.” Click here to visit listing on eBay

Korg Poly 61

“Korg Poly-61 Good overall cosmetic condition – I tried to highlight any flaws in the pictures. Serviced April 2021 Sounds Great. A great first vintage synth. I am sad to see this go, but it just doesn’t get used enough. I will meet a buyer from San Francisco Bay Area or Sacramento for delivery. I do not accept returns.” Click here to visit listing on eBay

Korg Poly 61 Project Machine

“KORG POLY 61 Synthesizer Vintage analog. Needs care. Powers up but sound output is erratic. keys may be dirty. I don’t know.
Cosmetically in good shape. I think it could be brought back to life.

So. the sound output is erratic. In some patches you press a key and sound comes out, some you have to hit hard to make a sound. Some patches, when you hit a key the note holds. some keys and patches don’t produce a sound at all.”
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Korg Poly 61

“Works good. Some damage to bottom edges. Joystick is bent. Number 1 button sometimes re-triggers. See pictures.

This was Korg’s answer to the Roland Juno-60 and it looks like a Juno-106 but the Poly-61 is more interesting in many ways.” Click here to visit listing on eBay

Korg Poly-61M

” Korg Poly-61M completely refurbished, new oak chassis, new switches, Beautiful !

This synth was in very good condition, even before I refurbed it. I just wanted to create the best possible P-61M I could. It has never had a battery leakage, although I have updated the battery to a modern 3.6V cell battery. I refurbished the keyboard, cleaning it thoroughly piece by piece, and after polishing all the contacts, I applied the little carbon discs to each contact, as seen at sounddoctorin.com. It’s a brilliant fix, so now the keys play like new. Then I replaced all the program buttons’ switches with brand new ones, which fixes the annoying problem of not getting the buttons to work properly. Now, they are perfect. See the photo of the switch board with new switches. Then I built a brand new solid oak chassis for the synth, so as you can see, it is gorgeous, and now more solid than new. All pots lubricated, new knobs, all bolts and inserts for the chassis are new, and new feet. Nothing is missing.

This is a great analog synth, and all functions and features are working perfectly, and the sound is AMAZING. It is great having Midi on such a fabulous-sounding vintage synth, and this one has it straight from the factory. This is my finest work so far. Please read the feedback below from other buyers, to see how they have appreciated what I accomplished:” Click here to visit listing on eBay

Korg Poly-61M

“Korg Poly-61M completely refurbished, new oak chassis, new switches, Beautiful ! This synth was in very good condition, even before I refurbed it. I just wanted to create the best possible P-61M I could. It has never had a battery leakage, although I have updated the battery to a modern 3.6V cell battery. I refurbished the keyboard, cleaning it thoroughly piece by piece, and after polishing all the contacts, I applied the little carbon discs to each contact, as seen at sounddoctorin.com. It’s a brilliant fix, so now the keys play like new. Then I replaced all the program buttons’ switches with brand new ones, which fixes the annoying problem of not getting the buttons to work properly. Now, they are perfect. See the photo of the switch board with new switches. Then I built a brand new solid oak chassis for the synth, so as you can see, it is gorgeous, and more solid than new. All pots lubricated, new knobs, all bolts and inserts for the chassis are new, and new feet. Nothing is missing.” Click here to visit listing on eBay