Quasimidi Sirius Repair

Quasimidi Sirius Repair

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Description

Quasimidi Sirius Repair:

Quasimidi sirius repair:

  • A broken keystop
  • Non functioning keys,
  • Sequencer issues,
  • Sticky buttons.

It needed a complete overhaul. We found gaffa tape that had dried out and left a mess over the battery and ribbon cables, many minor issues that needed sorting out as shown below.

The unit had been working off a 9V 1A power brick which seemed rather odd as the internal 5V regulator should see at least 10V to operate correctly. Anyhow this was replaced after bench power testing had it running on less than 9V ?

Work done:

  • The snapped keystop was solved so the key actually worked again.
  • Key contact strips cleaned.
  • All potentiometers replaced.
  • Repaired broken EPROM leg to socket.
  • Buttons cleaned.
  • Keys cleaned.
  • Rust treated.

This thing is a small beast monster of a synth.

quasimidi sirius bent eprom leg
The EPROM had a bent leg
quasimidi sirius key removal to access contacts
Keys removed to access contact strip
quasimidi sirius internal rust needing treatment
Internal chassis rust needing treatment
quasimidi sirius gaffa tape mess
dried out gaffa tape over battery and around ribbon cables
quasimidi sirius broken key guide
broken key guide
quasimidi-sirius-tact-switches
tact switches in Quasimidi sirius
quasimidi sirius dirty key contact strip
Quasimidi sirius dirty key contact strip
quasimidi sirius new potentiometers being installed
Quasimidi sirius new potentiometers being installed
quasimidi sirius broken key
quasimidi sirius Before
quasimidi sirius finished
quasimidi sirius after