Ricoh D009 Service Manual page 273

TPM system authentication error
The system firmware is not authenticated by TPM (security chip).
878 D
Incorrect updating for the system firmware
Defective flash ROM on the controller board
Replace the controller board.
File Format Converter (MLB) error
880 B
A request to get access to the MLB is not answered within the specified time.
MLB defective, replace the MLB
SM 4-47
SC Tables: SC8xx -2
D009/D011/D012/D013