Ricoh D025 Service Manual page 501

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
BICU control data transfer abnormal
A sampling of the control data sent from the BICU reveals an
abnormality.
Controller board defective
CTL
641
External noise
D
BICU board defective
1. Check the connection between the controller board and BICU.
2. Replace the controller board.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
CTL
650 Communication error of the remote service modem (Cumin-M)
B
Authentication error
The authentication for the Cumin-M fails at a dial up connection.
Incorrect SP settings
-001 -
Disconnected telephone line
Disconnected modem board
Check and set the correct user name (SP5816-156) and password
(SP5816-157).
Incorrect modem setting
Dial up fails due to the incorrect modem setting.
-004 -
Same as -001
Check and set the correct AT command (SP5819-160).
SM Appendix 3-49
SC Tables
D023/D025