Repair Roland CR-78 Vintage Analog Drum Machine CompuRhythm Reparatur Service

28. Februar 2021

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Repair Roland CR-78 Vintage Analog Drum Machine CompuRhyth Reparatur Service

Roland CR-78 restoration. Output was working but none of the pattern was playing any instrument. The CR-78 smelled like leaky electrolytic capacitors. Customer also wanted to have MIDI installed.

I found a lot of these badly leaking Matsushita electrolytic caps. You can see that the substance thats usually in such a part comes out their legs. This substance will damage your gear. Trust me. You better have these caps removed and replaced as soon as possible.

This Roland CR-78 has now a CHD MIDI kit installed. The new pcb is mounted to the back.

I also replaced the battery and modified the charging circuit.

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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