HP 8340b User Manual

How
to
Replace
the
Battery
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CAUTION
1
f^MM^^i
This
assembly contains
static
sensitive
components.
Work
at
a
bench
equipped
with
an
anti-static
surface,
and
wear
a
grounding
strap
that
provides
a
path to
earth
ground
of
between
1
and
2.5
MQ.
Always handle
a
printed circuit board
by the
edges;
never
touch the
finger
contacts.
Do
not
set
the
A60
assembly
on bare
metal;
this
can
short
out
and
cause
damage
to
a
good battery.
1.
Turn
the
line
switch
off
and
disconnect
the
instrument
power cord.
Wait
3
minutes.
2.
Remove
the
A60
processor assembly.
3.
Remove
the
battery and
dispose
of
it
properly (see
WARNING,
above).
4.
Check
the
new
battery
before
installing
it;
place
a
10K
ohm
resistor
across
the
battery
and
mea¬
sure
the
voltage
across
the
resistor.
The
voltage
should be
at
least
3.4V
(typically
3.6V).
5.
If
the
voltage
is
correct,
install
the
new
battery
in
the
processor assembly.
6.
Reinstall
the
processor
assembly
in
the
instrument.
Reconnect
the
power
cord,
and
turn
the
instrument
on.
The
front
panel
ENTRY display
reads
CALIBRATION RESTORED.
7.
Verify that
TP26 (IBATT)
is
less
than
3
mV.
A
larger voltage
indicates
excessive
battery
drain.
8.
Replace
the
top
cover.
HP
8340B/41B
Controller
Section
Repair
Procedure
F-27

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English