Ensoniq SQ-80

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I own an Ensoniq SQ-80 synthesizer keyboard. This keyboard includes a sequencer and accepts floppy disks and cartridges.

Maintenance

One time I turned on the sequencer and it told me the battery was low. How nice of an electronic machine to let me know instead of just failing.


Upgrades

According to the technical manual, adding a ferrite bead to the wires between the transformer and the power supply prevents memory loss on shutdown, and should be checked on units with a serial number lower than 500890, when the factory started installing them.

References

http://www.buchty.net/ensoniq/
A huge resource-page, plenty of documents and links for repair, etc. for the SQ-80 and ESQ-1.