Ricoh M281 Series Service Manual page 557

Rev. 02/09/2017
SC672 (Controller start up error) is displayed
Symptom:
The following occur:
Communication error between operation panel and controller after machine is
SC672-00
powered on.
Communication error (receive) between operation panel and controller after
SC672-10
machine is powered on.
Communication error (send) between operation panel and controller after
SC672-11
machine is powered on.
Communication error between operation panel and controller after normal
SC672-12
start-up.
Communication error between operation panel and controller after normal
SC672-13
start-up; Operation panel not detected.

SC672 does not appear on the SMC report, as it is not logged.

The Smart Operation Panel communicates with the controller via a USB cable and IPU.

SC672 is triggered when the panel cannot communicate with the controller.
Cause:
Possible causes of SC672 include:

USB communication path failure (USB cable, IPU).

Controller boot up errors and/or operation panel boot up errors due to an abnormal break
in operations of the controller.
Possible causes of operation panel cannot light include:

USB communication path failure (USB cable, IPU).

Operation panel cannot communicate with controller due to controller boot-up error.
Solution:
Do the following.
1. Turn the machine power OFF/ON.
2. Do the action in the flowchart below to determine the cause and best course of action when
SC672 occurs.

If the SC recurs after you do the action in this flowchart, do the following:

If SC819 (cache error) appears in the SC history, replace the controller board.

If SC991 (SCS: scs time count level c') appears in the SC history, replace the
controller board and USB cable.
SM 6-119
Troubleshooting Guide
D255/D256/M281/M282