please redirect this question to properly forum, I don't know where to post this topic

So,
about a month ago, I became the owner of the vintage drum machine Korg DDD-5, but, don't had any instructions how to start playing rhythms.
If anybody has detailed user manual, tutorial, or good advice where to find it, please send me mail on
zmaraczmarac@gmail.com
This DDD-5 is in very good optical condition but don't know if all the controls worked properly. The display works, as well as pads (bass, snare, toms...), and sound was good. The problem is how to start custom, factory, presets (rock 1,2,3, bossa, disco...), or to create patterns or whole tracks.
Thanks anyone in advance!
Best regards,
Željko