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SECTION
5
Maintenance
INTRODUCTION
This section
con
tains
information
on
replacing
and
hand-
ling the lithium battery,
return
for
repair
procedures,
and
warranty
information.
The
schematic
and
assembly
draw-
ings
can be found
at
the
back
of ibis
manual.
HANDLING THE
LITHIUM
BATTERY
The
battery
on
the
7706
is
a
Lithium
Bromide
battery,
a
particularly safe
form
of
lithium
battery.
For handling
and
disposing
the batteries in
small
quantities,
no
special
guide-
lines
need be
followed other than
those
given
below:
•
Do
not short the
battery.
•
Do
not
expose
the battery
to
fire.
•
Do
not
open
the battery
•
Do
riot
recharge
the
battery.
•
Do
not
expose
the battery
to
temperatures
greater
than
70°C
CHANGING THE BATTERY
When
Tie
battery
voltage
falls
to
approximately
2.4
V,
the
Replace
Battery
LED and
Replace
Battery* signal
will
go
active.
At
this
point,
approximately two
weeks
of
battery
lite
remain
To
change
the
battery,
first
read
the instructions
tor
hand-
ling the lithium
battery
given
in
the
"Handling
ot
Lithium
Battery"
section.
Then remove
the
nonconductive
protective
backing
from
the
7706.
'
'
N
Caution
Do
not
set
the
card
down
on
any
conductive
material
or in
any
way
short the
battery.
^
—
,
Next,
remove jumper W5, shown
in
Figure
2-5.
Desolder
and remove
the battery
and
replace
it
with
a
new
one.
Addi-
tional
batteries
can be purchased
from Pre
Log under
pari
number
902663.
Battery current
should be
checked
tc
ensure
that the
cir-
cuit
is
working
correct
ly.
This
maybe
done
by
cor-
necting
a
100
ohm
resistor
across the two
posts
of
W5.
Measuring
the
voltage across
I
he
resistor,
you
should read
no more
than
0.003V, although
it
may
be
considerably
less.
If
the read-
ing
is
greater than
this,
remove
the
resistor,
leave
the cattery
disconnected,
and
call
Pro-Log
Customer
Service.
if
the
reading
is
correct,
remove
the
resistor
and
replace
i
nrnper
W5.
Replace
the
nor conductive
protective
backing
with a
new
pad.
Spare pads can be purchased
from Pro-Log
under
part
number
I
07100.
5-1
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