HP 8340B Manual 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