The serial number can be an unexpected hero when you need to restore your Korg M1 to its original factory state.

Counterfeit Korg M1s do not exist. The custom PCM chips and physical keybed components were too complex and expensive to replicate in the late '80s.

The primary silver or black product sticker is located on the rear chassis, usually near the power socket, MIDI ports, or the main output jacks.

of the unit, usually near the power input or the MIDI ports. Production Context: Korg produced approximately 250,000 units between 1988 and 1995. Serial number was famously reached in November 1990. Diagnostic Check:

The serial number is located in two places on the physical hardware. The Rear Panel Sticker

Units with higher serial numbers were produced later in the production run. Korg M1 Firmware Version

Some later units simply include the year in the first two digits (e.g., 90XXXX would imply 1990).

Regardless of the serial number, any M1 bought today will likely need a new CR2032 battery soldered or slotted into the mainboard to retain user presets. If you want to verify a specific unit, tell me: What are the first three digits of the serial number? What ** firmware version** does it display on startup?

Press and hold the button and the CARD button simultaneously. Turn the power switch ON .

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Serial numbers also help collectors distinguish between units originally destined for the Japanese domestic market versus international exports, which occasionally featured different power supply configurations. Maintenance and Modern Value

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