Ricoh P C300W Field Service Manual page 200

5.System Maintenance
For a USB connection, click [Eng. F/W Update (USB)].
7.
For a network connection, enter the machine's IP address in [Machine IP address], and then click
[Eng. F/W Update (LAN)].
Do not use the [F/W Update (USB)] and [F/W Update (LAN)].
The firmware update starts.
The message "Eng Firmware is updating..." appears.
8.
Wait until the update completion message appears on the machine's operation panel.
9.
Printer model:
MF model:
188