iv)
If
you use the PX-8 while charging it
at
the same time, you will
not
be
able
to
use it for as long as you might expect.
If
you intend
to
use the PX-8
from the battery alone, the adapter should be removed from the PX-8 and
then reinserted in order to ensure it will fully charge. You should then en-
sure
that
it
is
left for
at
least 8 hours before use in order to achieve the
maximum length
of
use.
v) The maximum length
of
use
on
battery power
is
15
hours without In-
put/Output
operation.
vi) There are special circuits
to
prevent overcharging
of
the battery.
/I\.
WARNING:
W Never use any
AC
adapter other than that provided.
2.1.2 Before switching
on
Your PX-8 cannot be used immediately after unpacking. The following proce-
dures must be carried
out
before turning
on
the power switch.
Your dealer will probably have carried
out
the procedures in this section when
you receive the computer, in which case you can go
to
section 2.2
to
see how
to
operate the computer.
a) Inserting and charging the battery
The PX-8 has been designed as a portable computer powered by rechargeable
internal batteries. There are two battery units, main and backup. When the main
batteries have insufficient power remaining
to
allow continuous operation, a
message appears
on
the screen for 20 seconds:
CHARGE
BATTERY
then the power
is
automatically turned
off
and the backup
ba~tery
takes over
so
that
the program
or
work in progress
is
retained until the batteries can be
re-charged.
If
the computer
is
not switched
on
the batteries are used to retain
the contents
of
the memory.
It
is
possible, therefore, for the batteries to be-
come discharged.
In
order to prevent this the computer will normally be shipped
with no main batteries. You should therefore proceed as follows:
i) Insert the batteries as described in the addition sheet,
or
as described in
Appendix C.
2-2
ii) Plug the
AC
adaptor
power cable into
an
AC
outlet.
iii)
Plug the
AC
adaptor
output
cable into the PX-8 adaptor jack.
-'"
fFIg.2.1
iv)
About
8 hours (or
11
hours
if
the power switch
is
left on) are required to
fully charge the battery units.
If
when you come to switch
on
the computer
the'
'CHARGE
BATTERY" mes-
sage comes
up
on
the screen, it
is
still possible to use the computer while it
is
charging.
IF
NO DISPLAY IS VISIBLE
WHEN
YOU FIRST SWITCH
ON
THE
COM-
PUTER
the batteries may be discharged. This can occur
at
any time. Simply
plug in the charger, wait 10 seconds and then switch
on
again.
IF
NO DISPLAY IS VISIBLE
AT
THIS STAGE, the batteries are so low
that
all the power
is
being used to charge them and there
is
no additional power
available to perform the normal functions
of
the computer. Switch the power
switch off, wait a few minutes and try again.
b)
DIP
Switch settings
As mentioned in Chapter
1,
all
of
the layouts
of
character keys shown in table
2.1 are available with your PX-8 regardless
of
the markings
on
the key tops.
The keyboard layout can be altered by means
of
the
DIP
switch (SW
4)
which
lies under a cover beneath the PX-8 near the keyboard (see fig 2.2).
It
is
also
possible to alter the character set by means
of
software. This
is
described in
Appendix A 'ESC codes' using ESC
"c"
and Chapter 3 under the CONFIG.
Open the
DIP
switch cover underneath the PX-8 (fig 1.1c) and check
that
the
DIP
switch settings correspond to the characters for the country you require,
2-3
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