Ricoh M281 Series Service Manual page 492

Service Call 622-691
6.7.2 SC600 (CONTROLLER)
SC No. Type
SC641-00 D
SC No. Type
SC670-01 D
D255/D256/M281/M282
Details (Symptom, Possible Cause, Troubleshooting
Communication error between BiCU and Controller board.
Controller board does not respond after BiCU tries to
communicate three times.

Controller board software error

Connect error between BiCU and Controller board

BiCU software error

Check connections between Controller board and BiCU.

Turn the main power OFF then ON.
Error Name/Error Condition/Major Cause/Solution
Engine does not start up during the staring up

/ENGRDY signal was not asserted when the machine was
turned on.

PCI I/F is not linked up when the machine returns from
energy saver mode.

EC/PC/SC response was not received within specified time
from power on.

Writing to Rapi driver failed (the other party not found
through PCI).

Connection defect between controller board and BiCU.

BiCU is down / unstable
Engine board does not start up.
Refer to page 6-118 "SC670 (engine start up error) is displayed".
6-54
Procedures)
SM