Ricoh Aficio SP C440DN Field Service Manual page 602

6. Troubleshooting
No. Type
841-00
No. Type
842-00
842-01
842-02
600
Details (Symptom, Possible Cause, Troubleshooting)
B EEPROM error 2: EEPROM read/write error
Mirrored data of the EEPROM is different from the original data in EEPROM.
• Data in EEPROM was overwritten for some reason.
Details (Symptom, Possible Cause, Troubleshooting)
C NAND-Flash Update Verify Error Detected.
SCS write error (verify error) occurred at the Nand-Flash module when
remote ROM or main ROM was updated.
Nand-Flash failed
• Cycle the machine off/on.
• Replace controller board
B Insufficient Nand-Flash blocks (threshold exceeded)
At startup, or when machine returned from low power mode, the Nand-
Flash status was read and judged that the number of unusable blocks had
exceeded threshold, and then SCS generated the SC code.
Number of unusable blocks exceeded threshold for Nand-Flash
• Replace controller board
B Number of Nand-Flash block deletions exceeded
At startup, or when the machined returned from low power mode, the
Nand-Flash was read and judged that the number of deleted blocks had
exceeded threshold, and then SCS generated this SC code.
Number of blocks deleted exceeded threshold for Nand-Flash
• Replace controller board
CTL
CTL
CTL
CTL