HP 8340b - Page 524

6.
The
line
module
is
held
in
by
four
plastic
retainers
and
two
metal
clips.
The
metal
clips
are
NOT
^&
part
of
the
line
module
and
must
be
removed
before
the
line
module
can
be
removed:
^^
a.
To
release
the
metal
clips,
using
wire
cutters,
cut
the
plastic
retainers
away
at
the
base,
flush
with
the
body
of
the
line
module,
well
away
from
the
tops
of the
metal
clips.
The metal
clips
do
not
come
off
if
any
plastic
remains.
b.
With a flat
head
screwdriver, pry
the
metal
clips
away
from
the
line
module;
lay
them
down
as
far
as
possible.
c.
Remove
and discard the
metal
clips;
remove
the
line
module.
Line Module Installation
1.
Select
and
install
the
proper fuse
in
the
fuse
holder.
2.
Set the
line
voltage
selection
cam
to
the
proper
line
voltage.
NOTE: The
cam
does
not
turn.
To
change
the
line
voltage selection,
remove
the
cam
from
the
power
line
module and
replace
it
in
the
proper
position.
3.
Place
the
metal
retainers
(HP
part
number
02932-00038)
on
the
line
module,
the
portion
of
the
clip
that
is
bent
90°
(at
each end
of
the
clip)
should
fit
under
the
plastic
retainers
on
the
line
module.
4.
When
you
insert
the
line
module
in
the
rear panel, ensure
the
line
cord receptacle
is
on
the
side
farthest from
the
instrument
fan.
5.
Push
the line
module
in
firmly
until
all
clips
engage on
the inside of the
rear
panel.
6.
Wire the
new
line
module
as
shown
in
Figure
1-4.
Reinstall
the
rear
panel
by
reversing step
4
of
the
line
module
removal
procedure.
FAN
REPLACEMENT
Fan
Removal
Refer
to Figure
1-6.
1.
Disconnect
line
power,
and
remove
the
instrument
top
and
bottom
covers.
2.
Wait
for
the
A19
power-on
safety
indicator
to
go
out.
3.
Remove
two
screws
(item
12)
from
the
rear
panel frame
(top).
4.
Remove
three
screws
(item
13)
from
the
rear
panel
frame
(bottom).
5.
Remove
the
A35
assembly protective
cover
(item
10),
the
A35
assembly,
and the
nearby
capacitor
cover
(item
11).
6.
Disconnect
the
fan cable
from J30.
1-20
Power
Supplies/Fan
Repair Procedures
HP 8340B/41B