assories Serv
ce
and
Ma
ntenance 105
If
you use your HP-25 extensively
in
field work
or
during travel,
you may
want
to
order
the optional
Reserve
Power
Pack
, con-
sisting
of
a
battery
charging
attachment
and a spare battery
pack
.
The
Reserve
Power
Pack
enables
you
to
charge
one
battery
pack while using the
other
in
the calculator. See the
Accessory
Brochure shipped with the calculator for details.
If
a
battery
pack will
not
hold a charge, and seems to discharge
very quickly
in
use, it may be defective.
The
battery
pack
is
warranted
for one year, and if the
warranty
is
in
effect, return
the defective pack along with
your
HP-25 and
battery
charger
/
ac
adapter
to
Hewlett-Packard
according to the shipping in-
structions.
If
the battery pack
is
out
of
warranty, see your
nearest
dealer
or
use the
Accessory
Order
Form
provided with
your HP-25 to
order
a replacement.
Service
Low Power
When
you are operating from battery
power
in
RUN
mode, all
decimal points
except
the true one light to warn you
that
you
have a minimum
of
1 minute
of
operating time left.
16
0.2.
. . .
..
23
1 Low Power Display
1
True Decimal Point
You
must
then either
operate
the calculator from the
battery
charger
/ac
adapter
as described under
AC
Line
Operation,
or
you
can
substitute a fully charged battery pack for the one
in
the
calculator.
Blank Display
If
the display blanks out, turn the HP-25
OFF,
then
ON
.
!fl
o.oo
l
does not appear
in
the display
in
RUN
mode, check the following;
1.
If
battery
charger
is
attached to the H P-25, make sure it
is
plugged into
an
ac outlet.
If
not, turn the calculator
OFF
before plugging the charger into the ac outlet.
2.
Examine
battery pack to see if the
contacts
are dirty.
3.
Substitute a fully charged battery pack,
if
available, for the
one that was
in
the calculator.
4.
If
display
is
still blank, try operating the HP-25 using the
charger
(with the batteries
in
the calculator).
5.
If,
after
step
4,
display
is
still blank, service
is
required.
(Refer
to
Warranty
paragraphs.)
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