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Repair Dr. Böhm Digital Drum Machine Reparatur Service

4. April 2016
Categories
  • Reparatur
Tags
  • Digital Drums
  • Dr. Böhm
  • Drum Machine
  • Düsseldorf
  • Hohner
  • refurbished
  • Repair
  • Reparatur
  • Service
  • Vintage
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair

Dr. Böhm Digital Drums

Dr. Böhm (Hohner) Digital Drum Machine restoration / repair. This one was is a beast. Great machine, but also a great damage that was done by the leaky battery. I recommand. If you have such Dr. Böhm Digital Drum Machine (or Hohner) please check and/or replace the (rechargable) battery NOW! Time is running... On the 1st picture you may think, it looks ok.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
But I can easily spot the green substance on the pcb around the battery. If you didn't spot it now I will give you another picture. You should see it in the 2nd picture.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
If you still don´t see the substance take a look after I removed the battery.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
The problem with this substance is, that it damages (eats away) your copper traces. As you can see here.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
First you have to determine what substance that is. If its base or acid. And then you take the opposite to neutralize that substance. In this case I used citric acid with a q-tip (and) toothbrush and then ipa. If you do this carefully you have a good chance to nearly stop the process. I cleaned it as good as I could and rebuild the traces. Maybe next time I use a replica pcb, since desolering and rebuild a lot of traces was a lot of work.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
I replaced all parts, incl. all ic sockets, resitors, capacitors etc... everything except cpu,ram and rom. The next common failure point on these machines are the switches.
Repair Dr. Böhm Digital Drum Machine Reparatur Service
I tried to clean and glue them back together which, ... works (quite well)... but I was lucky and found some nos parts. The Böhm is now rock solid. Dr. Jay got it resurrected.
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!
 
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Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair
Repair Dr. Böhm Digital Drum Machine I battery damage leakage repair

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My Clients

Marc Romboy
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Ian Pooley
Loco Dice
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Nikolai Kaeßmann
Ramon Zenker
Manuel Schleis (Vengeance Sound)
Markus Boehme
Martin Gerke
Marcus Worgull
Stefan Robbers
Stephan Römer
Stefan Teledgy
Ocsidance Pro Audio (NL)

...just to name a few ;)

I’m documenting repairs for my reference and yours. I do synth restorations and repair with a specialty in vintage synthesizers, drum computer and tapedelays, based in Düsseldorf, GER. Get in touch about your synth situation!

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Clients

Marc Romboy
Danilo Plessow (Motor City Drum Ensemble)
Wolfgang Voigt
Steve Baltes
Robert Babicz
Thomas P. Heckmann
Ian Pooley
Loco Dice
Kai Niggemann
Nikolai Kaeßmann
Ramon Zenker
Manuel Schleis (Vengeance Sound)
Maarwegstudio2
Markus Boehme
Martin Gerke
Marcus Worgull
Stefan Robbers
Stephan Römer
Stefan Teledgy
Ocsidance Pro Audio
…just to name a few 😉

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