HP 8340B Manual page 386

Transformer Installation
1.
Reverse the above procedure.
NOTES: When you reverse step 4a, do not allow the transformer secondary wires to touch
adjacent
A62 motherboard
lugs.
Ensure that the white transformer secondary wire pair is
reattached
to the A62 motherboard lug
labeled (9).
DO NOT attach it
to
the
taller,
unmarked
lug.
When reversing step 4a, ensure the blue
transformer secondary
wires are completely inside the
plastic clamp.
If
the plastic clamp
hardware is mounted
in
the wrong side panel hole, the
A19 assembly
will not
go back in
place.
Reinstall the A19 capacitor assembly as follows:
1.
Lift
the
two grey cables out of the way.
2.
Lower
the A19 assembly flange-end first
until the finger contact end drops
in place.
3.
Lift up slightly on
the flange-end, and push
down on
the finger connector side until
the fingers
are
fully seated.
LINE MODULE REPLACEMENT
Read the entire procedure before
you start!
Line Module Removal
Refer to Figure
1-6.
1.
Ensure that the main line fuse and the selected line
voltage are
correct.
2.
Disconnect
line
power,
and
remove the instrument top and bottom covers.
3.
Wait
for the A19
power-on safety
indicator
to go
out.
4.
Remove the portion of the
rear panel
that holds the line module:
a.
Remove two screws
(item
12).
b.
Invert the instrument and remove three rear
panel
screws (item
7).
c.
Remove the A35 assembly
protective cover
d.
Remove three rear panel screws
(item 13).
e.
Remove the fan.
f.
Remove three rear panel screws (item 8).
g.
From
inside the instrument, push the rear
panel out.
5.
Desolder all wires from the line
module.
HP8340B/41B
Change
4
Power
Supplies/Fan Repair
Procedures
1-19