Sc620: Communication Error Between Iob And Adf - Ricoh Aficio 220 Service Manual

SERVICE CALL CONDITIONS
SC590: Exhaust fan motor error
-Definition- [B]
The CPU detects an exhaust fan lock signal for more than 3.5 seconds.
- Possible causes -
• Poor connection of the exhaust fan motor
• Too much load on the motor drive
SC610: Communication error between IOB and duplex unit
-Definition- [B']
The IOB cannot communicate with the duplex unit properly.
- Possible causes -
• Poor connection between the IOB and duplex unit
• IOB defective
• Duplex control board defective

SC620: Communication error between IOB and ADF

Definition: [B]
The IOB cannot receive a response from the ADF main board for 4 seconds or
more.
Possible Causes:
• Poor connection between the IOB and ADF main board (DF connector)
• ADF main board defective
• IOB defective
SC691: Communication error between BICU and fax controller
-Definition- [B]
The BICU board cannot communicate with the fax controller properly.
- Possible causes -
• Poor connection between the BICU board and the fax controller
• BICU board defective
• Fax controller defective
7-10
20 September 1999