Epson PX-8 User Manual page 137

The batteries will take about 8 hours to charge if the PX-8 is not in use. To
prevent overcharging the batteries will trickle charge after 8 hours.
If
the bat-
teries are being charged while the computer is in use, the batteries may not be-
come fully charged. Thus charging should be repeated for at least 8 hours after
a session in which the PX-8 has been used with the AC adapter attached. This
charging should be carried out as follows:
1) Switch the main power switch to the OFF position.
2) Remove the AC adapter plug.
3) Replace the AC adapter plug.
4) Charge for 8 hours.
C-2 Problems with Recharging.
If.
the
P~-8
has been left for an extended period of time, the backup batteries
wIll contmue to be charged from the main batteries. At some stage the voltage
of the backup batteries will reach a level below which it is not possible to restart
normal operation of the PX-8. In this case proceed as follows:
1) Charge the batteries with the AC adapter for 10-15 seconds.
2) Turn the main power switch on the side of the PX-8 to the ON position.
3) If normal operation does not occur, open the cover to expose the DIP switch
and 7508 sub-CPU reset switch.
4) Press the sub-CPU reset switch, and the initialization message should ap-
pear on the screen as described in section 2.1.3.
5)
If
nothing happens at this stage, consult your EPSON dealer.
C-3 Switching off the Batteries during Extended Storage.
If
the PX-8 is not used for an extended period of time the battery charge will
gradually be reduced as the power is used to charge the backup batteries. If
this continues for too long, the battery will become overdischarged. This can
cause deterioration of the battery. In extreme cases, after a very long time, it
can result in the batteries leaking and damaging the computer.
C-2
If
the PX-8 is to be left unused for a period of sixth months or more, the bat-
teries should be switched off and disconnected as follows:
1) SA VB ALL PROGRAMS AND DATA ON TAPE OR DISK. All programs
and data in memory, including the RAM disk and Intelligent RAM Disk
will be lost when the batteries are switched off.
2) Switch the backup battery switch to off.
3) Open the battery cover (Fig. C.l) and unplug the main battery lead.
4) Replace the cover.
Underside of the PX-8
Fig. C.1
Backup battery switch
Fig. C.2
C-3