Ricoh MP C307 Field Service Manual page 463

SC6xx: Communication
No. Type
SC670-02 D

When SC670 is Displayed
No. Type
SC672-10 D
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Engine is down when machine starts up (SC reboot can not be performed) (* See "When
SC670 Is Displayed" below)
Machine-down was detected after the /ENGRDY signal was not asserted.
The engine board was reset at an unexpected time
Check the connection between the engine board and the controller board.
•
If it is always reproduced, replace the engine board. If the problem persists, consider
replacing the controller board or other boards between them.
•
If reproducibility is low, multiple causes are to be considered, such as software, engine
board, controller board, and PSU.
•
Check the status of ID chip in each toner cartridge (clean or correct the position).
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Controller start up error
After the machine was powered on, communication between the controller and the operation
panel was not established.
•
Controller stalled
•
Board installed incorrectly
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