Juno 106 – Restoration project

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Juno 106 - Restoration project

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I bought this in 2014 as a restoration project but if I couldn’t find time during 14 weeks off work I never will so I am selling it. 
It is being sold as a box of spare parts, I have no way of checking if anything in it works, I don’t want people messing it about, breaking it and then trying to send it back, so I have marked this no returns.
The previous owner claims to have bought it from “Ian, of Dream Frequency” who left it in storage for many years before selling it.  He took it to “Synth Repair Services” who wanted 440 to sort it out which he didn’t have so he sold it to me. NOTE: The quote included a new set of voice chips, but I was assured that this was purely precautionary.  Even if they worked then, I can’t guarantee they will work now. 
I have put the PCBs back in place for transport but they are not connected together.My original plan was to cut it down into a MIDI operated keyboard-less unit, and re-house the chorus in an external rack, so the state of some parts was not an issue. I completely dismantled it, had the main panel was soda blasted and powder coated white.  The bottom, front edge, brackets and sides were cleaned right down and sprayed with “tough black” car spray.The mains connector and switch were both very old and the wiring sticky so I replaced them all all. The fuse board left exposed mains terminals so I fitted a plastic cover. Unfortunately I had to slightly file the hole for the mains socket and slipped scratching the case (see photo) I tried to disguise it but it wasn’t 100%. My next plan was to get a label made saying “230VAC” to cover it.I replaced the main power supply capacitors as a precaution and refitted it. The voltage seemed to be fine without a load. The main voice module, CPU module and MIDI Module do not seem to have been exposed to the foam. There are some marks and occasional spots of rust on the tracks, but this is not uncommon for a synth this age. They have not been tested and have been refitted with new screws for transportationThe front panel PCB has some damage from the foam. I have cleaned some with Isopropyl alcohol and a fibre glass brush, but it was not quick work. The rubber gaskets on the sliders was perished and missing. Some of these have surface rust and will need to be cleaned or possibly replaced. The tactile switches will probably need replacing. I don’t know about the HPF switch. I haven’t touched the Chorus board, which will need cleaning and its mounting bracket has surface rust, but this could probably be treated and repainted. The bender board was not going to be needed and has not been cleaned. The bender itself is broken, two slider knobs are missing and one rotary knob is damaged. These can all be replaced. I have not done anything with the keyboard and was going to break it down and sell the keys individually eBay. The chassis is rusty but the keys seem to move well enough.  I was following this series of videos https://www.youtube.com/watch?v=KfbCUfTy9uE , which covers the complete restoration of a 106, including trying to rejuvenate voice chips and slider controls.On request I will send the buyer (and only the buyer!) an electronic copy of the service manual which I found on line, and a copy of the photographs I took during disassembly, showing the state of the PCBs before I started.  

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Category: Musical Instruments:Keyboards and Pianos:Electronic Keyboards
Location: Gillingham