HP 8340B Manual page 523

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.
HP 8340B/41B
power Supplies/Fan Repair
Procedures
1-19