Canon MF4600 Series Basic Operation Manual page 219

Message
USB/USB PORT ERROR
TURN POWER OFF → ON*
* MF4690PL Only
Description
A USB memory error or
USB memory port error has
occurred.
Action
Disconnect the USB memory
from the USB memory port,
turn off/on the main power
switch, and connect the USB
memory again. If the message
appears after connecting
the USB memory to the
USB memory port, the USB
memory may have problem.
If the message persists after
turning on the main power
switch, the USB memory port
may have problem. In this
case, turn off the main power
switch, disconnect the power
cord, and contact your local
authorized Canon dealer or the
Canon help line.
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