Action Yes No
Step 4
Replace the current controller board assembly with the original controller
board assembly. See “Controller board removal” on page 349.
Does the problem continue?
Go to step 6. The problem is solved.
Step 5
Replace the original control panel assembly with a new and not previously
installed control panel assembly.
Does the error continue?
Contact the next level
of support.
The problem is solved.
Step 6
Replace the original control panel assembly with a new and not previously
installed control panel door assembly.
Does the error continue?
Contact the next level
of support.
The problem is solved.
Input/output option hardware errors
3xx error messages (300‑399.99)
User attendance messages
Error code Description Action
321.51 No encoder feedback detected from the tray 2
pick/lift motor.
Go to “250/550-sheet media feeder failure service
check” on page 130.
321.52 Motor stop error—the tray 2 pick/lift motor kept on
running some time after the motor was commanded
to stop.
321.53 The tray 2 pick/lift motor went over the normal speed
322.54 No encoder feedback detected from the tray 2
transport motor.
Open the media tray, and make sure to remove all
obstructions.
If this doesn’t solve the issue, then go to “250/550-
sheet transport motor failure service check” on
page 128
322.55 Motor stop error—the tray 2 transport motor kept on
running some time after the motor was commanded
to stop.
322.56 The tray 2 transport motor went over the normal
speed
4063
Diagnostic information
123
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