How can i reset my DC's internal memory?

I looked in several sites and it didn't work ,can someone explain me in detail how to reset the DC's internal memory please?

There is prolly a lithium battery somewhere in the DC housing...

I don't advise doing this, but i would suspect that removing and then replacing this battery would clear any internal memory, just like the CMOS battery in a computer.

Resetting the enternal memory will delete your PSO pass codes and Browser settings. Dissconecting the battery will only reset the clock.
To reset the memory plug a controler into port 2 hold x y a b and press start. [may be the other way round]
If you do this you may not be able to register PSO with the server again.