Ricoh A250 Service Manual page 293

Rev. 02/2000
SC921: MSU Hardware Error
Definition: [B]
The hardware of the MSU is defective.
Possible Causes:
• MSU defective
• BICU defective
SC980: Program Loading Error
Definition: [A]
The program cannot load properly.
Possible Causes:
• The connection between the BICU and the ROM board is poor.
• BICU board defective
• ROM board or the program defective
NOTE: This SC should be cleared by trying to download again from an IC
Card.
⇒
SC981: NV-RAM Error
Definition: [B]
The NV-RAM is defective.
Possible Causes:
• The NV-RAM is defective.
• BICU board is defective
SC990: Communication Error between BICU and Input Output Board
Definition: [B]
The BICU board cannot communicate with the input/output board.
Possible Causes:
• The connection between the BICU board and the input/output board is poor.
• BICU board defective
• Input/output board defective
SC999: Program Version Error
Definition: [B]
The incorrect type of main software was downloaded.
Possible Causes:
• The main software for another machine was downloaded to this machine.
SM
SERVICE CALL CONDITIONS
7-9 A250