Ricoh SP 8400DN Field Service Manual page 1354

6.Troubleshooting
[D]: Replacing the Memory
1.
Turn the machine power OFF.
2. Attach the memory on the controller board as shown (in a vertical orientation).
3. Lock the hook.
[E]: CMOS clear
1. Turn the machine power OFF.
2.
Turn switch 5 ON for 10 seconds.
3. Turn switch 5 OFF.
4.
Turn the machine power ON.
Location of Switch 5 [A] (Controller Board)
616