Ricoh SP 8400DN Field Service Manual page 1140

4.Replacement and Adjustment
BCU
•
The FFC connector has a lock mechanism. Do not use force to pull it out.
1. Remove the rear lower cover.
2.
Remove the BCU [A].
When installing the new BCU
Remove the NVRAM (EEPROM) from the old BCU. Then install it on the new BCU after you replace the BCU.
Replace the NVRAM (Replacing the NVRAM (EEPROM) on the
defective.
•
Make sure you print out the SMC reports ("SP Mode Data" and "Logging Data") before you replace the
NVRAM (EEPROM).
•
Keep NVRAMs (EEPROM) away from any objects that can cause static electricity. Static electricity can
damage NVRAM data.
•
Make sure the serial number is input in the machine for the NVRAM data with SP5-811-004, if not,
SC995-001 occurs
Replacing the NVRAM (EEPROM) on the BCU
1.
Make sure that you have the SMC report (factory settings). This report comes with the machine.
2. Output the SMC data ("ALL") using SP5-990-001/SP5-992-001.
3.
Turn off the main switch.
4. Insert a blank SD card in the SD slot #2, and then turn on the main switch.
5.
Use SP5-824-001 to upload the NVRAM data from the BCU.
6.
Turn off the main power switch and unplug the power cord.
Replace the NVRAM [A] on the BCU with a new one.
402
(Rear Lower Cover)
BCU) if the NVRAM on the old BCU is