Argox X Series - Manual (Page 100)

100
RTC Battery Replacement
1. Turn off the printer; disconnect the AC power cord.
2. Open the left cover of printer.
3. Loose the lock for RTC Battery on main board and then replace
with a known good RTC battery.
CAUTION:
Risk of explosion if battery is replaced by an incorrect type. Dispose
of used batteries according to the instructions.