HP 8340b User Manual

Reference
Loop
—
M/N
Loop
Repair
Procedures
A34
REFERENCE
LOOP
-
M/N
LOOP
MOTHERBOARD
REPLACEMENT
PROCEDURE
To
remove
the
A34
assembly
the hinged
RF
deck and
A19
capacitor
assemblies
must
first
be
removed.
Perform
the
following
steps:
Remove
the
Hinged
RF
deck
as
follows:
NOTE:
Use
of
Phillips
screwdrivers
instead of
pozidriv
screwdrivers
is
not
recommended.
1.
Remove
the
top,
bottom,
and
perforated
side
covers.
Place
the
instrument on
its
left side
(as
viewed
from
the
front).
Refer
to
Figure
B-35,
Internal
Assemblies,
Cables,
Mounting
Hardware
Location.
WW^WKW
(
CAUTION
1
JUM^MMiMiM
A10J1
A10J2
and
A10J3
are
precision
APC
3.5 mm
connectors.
The
cables
and
AH Band 1-4
detector
assembly
that
connect
to
them
use
SMA
connectors.
Extreme
care
should be
taken when
disconnecting
or
connecting
an
SMA
cable
from
a
mating
3.5
mm
connector.
The
SMA
cable
center
conductor
must
align
with
the
3.5
mm
connector
center
conductor.
If
there
is
any
axial
force
on
the
cable when
disconnecting
the
SMA
fitting,
the
3.5
mm connector center
conductor
may
be
damaged,
necessitating
the
replacement
of the
A10
directional
coupler.
Remove
any
axial
force on
the
cable
by
first
disconnecting
the
end
of
the
cable
that
does
not mate
with
a
3.5
mm connector or
by
removing
the
mounting
screws
of
the
device
having
3.5
mm
connectors.
Perform
both
safeguards
where
possible.
The
A10J2
—
A11J1
connection
is
not
as
critical
because
the
A11J1
connector
has
a
captured
nut.
This
nut
does
not
allow axial
force on
the
APC
3.5
mm
center
conductor
until
well
after
the
SMA
center conductor
is
disengaged.
BOTTOM
OF
INSTRUMENT
NOTE:
A
5/16
inch
open-end
wrench
will
remove any
semi-rigid cable
in
this
procedure.
In
the
following
text,
you
will
be
referred
to
VIEW
A,
VIEW
B,
etc.
All
such
occurrences
refer
to
Figure
B-25,
Internal
Assemblies,
Cables,
Mounting
Hardware
Locations.
2.
Refer
to
VIEW
B.
Remove
W14
from
the
A12
assembly.
Loosen
W16
where
it
connects
to
the
A13
SYTM.
Carefully
disconnect
the
other
side
of
W16
from
the
A10
assembly.
Use
extreme
care
to
avoid
axial
force
on
the
W16
to
A10J1
connection.
3.
Refer
to
VIEW
A.
Using
a
large
pozidriv
screwdriver,
remove
three
side
panel
screws
(item
4)
that
hold
the
A13
assembly
to the
side
rail.
4.
Refer
to
VIEW
A.
Using
a
large
pozidriv
screwdriver, remove
two
side
panel
screws
(item
5)
that
hold
the
RF
deck
to
the side
rail.
B-44 Reference Loop
-
M/N
Loop
Repair Procedures
HP
8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English