@Remote Service Id2 Mismatch Error 2; Engine Startup Error; Engine Board Mismatch Error - Ricoh D093 Service Manual

Service Call Tables
653 D

@Remote Service ID2 Mismatch Error 2

One of the following problems exist with the ID2 stored in NVRAM:
ID2 has less than 17 digits
A non-printable character exists in ID2
ID2 is all spaces
ID2 is NULL
Replace NVRAM.
Clear the Cumin setting, set the common authentication, then try again.
670 D

Engine startup error

The MCU failed to respond within the prescribed time when the machine was
turned on.
Connections between MCU and controller board are loose,
disconnected, or damaged
MCU defective
Controller board defective
671 D

Engine board mismatch error

Engine board and controller mismatch detected.
Wrong engine board installed.
Wrong controller board installed.
Check the type of engine board and controller board.
Replace BICU
Replace controller board
D093/D094 7-30
CTL
CTL
CTL
SM