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
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