Ricoh D131 Service Manual page 544

EEPROM access error
A read error occurred during I/O processing. The failure of the 3rd
attempt to read caused this error.
SC840 D

Defective EEPROM

Replace the EEPROM.
EEPROM read error
Mirrored data of the EEPROM is different from the original data in
EEPROM.
SC841 D

Data in the EEPROM was overwritten for some reason.

Cycle the machine off/on
Nand-Flash updating verification error
A write error for the module written in Nand-Flash occurred while the
remote ROM and ROM were being updated.
SC842 C

Damaged Nand-Flash

Cycle the machine off/on
Network I/F error

SC850 B Network not operating.

Cycle the machine off/on
SM Appendix 2-77
SC800: Overall System
GW
GW
GW
GW
D131/D132/D133