Ricoh B230 Service Manual page 321

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
CTL Self-diagnostic error: ROM
828
D [XXXX]: Detailed error code
Check sum error 1
The boot monitor and OS program stored in the ROM DIMM is
[0101]
checked. If the check sum of the program is incorrect, this SC code
is displayed.
Check sum error 2
All areas of the ROM DIMM are checked. If the check sum of all
[0104]
programs stored in the ROM DIMM is incorrect, this SC code is
displayed.
Defective ROM DIMM
Defective controller
1. Turn the main switch on and off.
2. Replace the ROM DIMM
3. Replace the controller.
SM 4-81 B230/B237