Ricoh B039 Service Manual page 133

No.
Definition
925 B IMB non-connected error
IMB is not connected. This SC only
appears with B040 and B043 version
machines.
926 B Memory capacity error
The machine detects a discrepancy
between the memory capacity detected
during the memory check at power on
and the check at recovery from low
power or night/off mode.
981 B NVRAM error
The machine detects a discrepancy in
the NVRAM write/read data when
attempting to save actual data to the
NVRAM (i.e. during actual use).
990 B Communication error between BICU and IOB
The BiCU board cannot communicate
with the IOB.
999 B Program version error
An incorrect type of main software was
downloaded.
SM
Symptom
4-7
SERVICE CALL CONDITIONS
Possible Cause
• IMB is not connected
• Poor connection between BiCU and
IMB
• IMB defective
• BiCU defective
• Poor connection between optional
DRAM and IMB
• Optional DRAM defective
• IMB defective
• BiCU defective
• NVRAM defective
• Poor connection between BiCU and
NVRAM
• NVRAM is not connected
• BiCU defective
• The connection between the BiCU
board and the IOB is poor.
• BiCU board defective
• IOB defective
• The main software for another
machine was downloaded to this
machine. Switch the machine off.
Connect an IC card that has the
correct firmware to the machine.
Switch the machine on, and download
the firmware. (☛ 5.1.9)
B039/B040/B043