Repair Chroma Polaris Reparatur Service22. Juli 2017
Repair Electro Harmonix DRM16 Vintage Analog Drum Machine Reparatur Service5. August 2017
Today on my bench is a Korg MS20 vintage analog synthesizer from Robert Babicz. When he says, his Korg has a tuning problem then the synth has a tuning problem! Which again is very common. The issue here are the dirty rotary switches. The plastic sides are cracked in some places. I will fix that with some glue. Some screw heads are damaged. I took off all knobs and disconnected all pcbs to get them out. Now I have access to the rotary switches and potentiometers. I am going to desolder them all, open them up and clean them properly. On the pictures you can easily see how dirty and corroded these switches are. While I am in here I will change the electrolytics since they measure a bit leaky. All tantals have to go. I clean all jacks and refresh the nuts. Finally I do a full calibration on this unit. Roberts Korg MS20 is now in perfect technical and good cosmectic condition and waiting to create some phat techno waves. Like always I share my repair pictures with you.
There are lethal voltage exposed in electronic devices. Unless you know what you are doing, don’t try this. If you following along, you doing so at your own risk.
I’m documenting repairs for my reference and yours.
I do synth restorations and repair with a specialty in vintage synthesizers, drum computer and other vintage gear, based in Düsseldorf, GER. Get in touch about your synth situation!