HP 8340B Manual page 362

6.
Remove
W53 and W52 from the
isolator.
7.
Note the orientation of the isolator
(the out
port is
to the left
when viewed from the top). Remove
the two screws holding the isolator mounting plate.
8.
To Install
a
new assembly, reverse the above procedure.
A14/A14A1 High Band Power Amplifier Replacement Procedure
Refer to Figure H-23 for related assemblies, cables, and mounting hardware
locations.
1.
Remove the ribbon cable
going to A14A1, and completely remove W7.
2.
Disconnect W6 from
A14.
3.
To
disconnect W6 from A16,
first
disconnect A8W1. Remove W6.
4.
Remove the
eight screws that hold the A14/A14A1 assembly together.
5.
To install
a
new A14/A14A1 assembly, reverse
the above procedure. When reconnecting
the
ribbon connector, be extremely careful not to bend the pins.
A15
Low Band Low Pass Filter Replacement Procedure
Refer to Figure H-23 for related assemblies, cables, and mounting hardware locations.
1.
Remove W10
and
W52 from the A15 assembly and remove the A15
assembly.
2.
To
install
a
new assembly, reverse step
1.
NOTE:
When
tightening W10
and
W52 to the A15 assembly, do not
tighten so hard that W10 or W52
is
stressed.
A16 High Band
Modulator/Splitter Replacement Procedure
Refer
to Figure
H-23, view
B
for related assemblies, cables, and mounting hardware
locations.
1.
Disconnect
the ribbon
connector from A16A1.
2.
Remove
the A8W1 and A18A1W1 connectors from the A20 assembly.
3.
Disconnect W5,
W6,
and
W29 from the A16 assembly.
4.
Remove the
five A16
mounting screws (item
11).
5.
Pull the A16 assembly out
far enough to
access cables W28
and
W29. Remove these cables by
gently and carefully
prying them up with
a
small, flat tool.
6.
the entire A16/A16A1 assembly
is
now free.
Transfer the
cable (W30)
that
interconnects A16 and
A16A1 to the
new
A16/A16A1 assembly.
7.
Remove the
5
countersunk screws that
hold the A16 mounting plate to the A16 assembly, and
attach the mounting plate to the
new
A16/A16A1 assembly.
8.
To install the new assembly, reverse the above procedure (steps
1
through 5).
H-42
RF
Section Repair Procedures
HP 8340B/41B