synth guts

synth guts

The unstoppable Wersimatic

Published on Sep 18, 2017 organfairy

"Normally 'unstoppable' is a positive word. But when it is used in the same sentence as "drum machine" it tends to be annoying.
My Wersimatic II was literally unstoppable so I had to do something about it. It turned out to be a defective logic gate. Quite and easy fix but still something I had to do.

The music is 'Knuden' which was a minor hit for the

Synthchaser #079 - Oberheim OB-8 Dead & Intermittent Key Repair

Published on Sep 11, 2017 Synth Chaser

"This OB-8 is for sale at:

Most OB-8's use a different style of keybed than found on other OB's. These keybeds often have problems with dead or intermittent key contacts. In this video I show you how to access the key contacts, and how to repair them for reliable long-term operation.

Parts for DIY repair and restoration of

Oberheim OB-Xa 8 Voice 120 Program Analog Synthesizer Keyboard w/MIDI

Uploaded on Sep 10, 2017 Synth Chaser

via this auction

Note this one is via Synthchaser and also listed on his site for quite a bit less. He is a reputable synth tech. You might remember synthchaser from his videos here on MATRIXSYNTH.

"The flagship of the OB series, this is an 8 voice, 120 Program Oberheim OB-Xa, with Numera MIDI adapter! One of the most awesome, fattest sounding analog

Synthchaser #078 - Oberheim OB-8 Voice Board Repair

Published on Sep 9, 2017 xSynth Chaser

"A customer sent a broken OB-8 voice board in for repair. We locate and repair a damaged trace, replace an incorrect capacitor and test it out in one of my OB-8's.

Parts for DIY repair and restoration of Oberheims are available at my website. I also repair and restore Oberheims and other vintage synths for customers around the

How to replace the battery on an Ensoniq ESQ-1 synthesizer

Published on Sep 3, 2017 Mike Sisk

"In this video I show how to properly replace the battery on an Ensoniq ESQ-1 Digital Wave Synthesizer. Make sure to backup all info before attemping this battery swap as this process will wipe everything as soon as the old battery is removed.

The correct battery for this synth is a 3V Lithium 1200 ma, 2/3A cell and it can be purchased at Digikey at the link

How to repair faders on a vintage synthesizer

Published on Sep 1, 2017 Mike Sisk

"In this video I show how to repair faders (or slide potentiometers) that are used on many vintage analog synthesizers. The faders I am repairing are from a Roland SH-1 synthesizer but this same process will work on other types of faders from other manufactures as well. To do properly do this the faders must be individually desoldered from the board and opened

KORG EX-8000 SN 003610

via this auction

More pics of the inside below.

"New backup battery mod installed. Now when you need to change the battery it will be so easy. Just take the top cover off and its right there, see the picks.. New battery installed today. CR2032 3.32 volts
Power supply has been updated with all new regulators, 3 x LM7805, 1 x LM7809,
Main filter capacitors are new 1-4700uf ,1-6800UF, 1-1000UF


via this auction

"This is the Rev A model with the sought after CEM 3389 analog filters. It comes from a smoke free home. This is how I bought it, I don't know what is wrong with it but I would start by installing a new power supply."

Some nice shots of the inside below.

Synthchaser #077 - ARP Omni 2 Phaser Repair

Published on Aug 25, 2017 Synth Chaser

"In wrapping up the restoration of an ARP Omni 2, I noticed the sound was ever so slightly off. Together we track down the problem and repair the culprit delay line on the phaser board of the synthesizer.

Parts used in this video are available at my website. I also repair and restore ARPs and other vintage synths for customers

Treat Yourself :)