Ricoh Aficio SP C440DN Field Service Manual page 598

6. Troubleshooting
No.
624 D
No.
669
SC672-11
No.
SC681
596
Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
4th Paper Bank (option) communication error
This SC is not issued for this machine.
When a communication error signal between the 3rd paper bank and 4th paper
bank is received.
• Loose or disconnected connector
Check the connection between the main machine and paper feed unit.
Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
D NVRAM error
Retry of NVRAM communication fails three times after the machine has detected
the NVRAM error.
Caused by noise
Turn the main power switch off and on.
Type Details (Symptom, Possible Cause, Troubleshooting
D RFID: Communication error
• Communication error occurs at communication with the RFID receptor.
• Retry of RFID communication failed
• Defective RFID reader and writer
• Disconnected ASAP I/F
• No memory chip on the toner cartridge
• Noise
1. Remove and then re-insert each toner bottle.
2. Replace the toner bottle.
3. Confirm that RFID connectors and harnesses are connected correctly.
4. If the connectors and harnesses are damaged, replace the RFID_CPU
board and Harness: ANTENNA: Toner Supply.
5. Replace the affected RFID_AFE board (KMCY). (See table below.)
6. Replace the BCU.