Woah, I never knew solenoids could be this good at impersonating audio oscillators! — plus I had no idea copy machines had such advanced easter eggs. Dspdude explains -

This test fixture for a photocopier uses solenoids that are driven by a special song. Reminiscent of the Honda commercial for the early 80′s. The easter egg is initiated through the Diagnostic interface, and the solenoids are driven over the CAN bus.

FYI – Originally designed for use in vehicles, the CAN (controller–area network) bus allows onboard microcontroler to chit-chat with each other within system hardware (thanks Wikipedia). And when there’s no good gossip about toner levels and paper jams, I guess they have band practice?