Agilent Technologies 4339B Service Manual

A1
Main
Board
Removal
Removal
Procedure
1.
Remove the
A2
CPU
Board
Assembly
while
referring
to
\A2
CPU
Board
Assembly
Removal".
2.
Disconnect
the
following
cable
assemblies
from
the
A1
assembly
.
a.
F
our
cable
assemblies
from
the
front
panel
b.
The
cable
assembly
from
the
transformer
c.
Two
cable
assemblies
from
the
DC-DC
Converter
3.
Disconnect
the
four
optical
ber
cables
which
are
connected
to
the
A3
Ammeter
Board
Assembly
4.
Disconnect
the
four
optical
ber
cables
from
the
A3
Ammeter
Board
Assembly
Caution
To
avoid damaging
on the
optical ber
cable
caused
by
bending
or
other
mechanical
stress
, remove
all the
ber
cables
from
the
4339B
when
replacing
either
the
A1
board
or
the
A3
board.
5. Remove
the cable
clamp on
the shield
case
which
surrounds
the
A3
board.
6.
Remove
the nut
which fastens
the
Ext
Trigger
connector
on
the
rear
panel.
7.
Remove
the
screw
which
secures
the
A1
board
to
the
chassis
side
.
8.
Remove
the
four
studs
,
that
secure
the
A1
assembly
to
the
chassis
,
by
rotating
the
studs
with
a
at
bladed
screwdriver
.
9.
Remove
the
three
screws
that
secure
the
A1
assembly
to
the
chassis
.
10.
Remove
the
A1
assembly
from
the
chassis
.
A2
CPU
Board
Assembly
Removal
Removal
Procedure
1.
Remove
the
cover
while
referring to
\Cover Removal".
2.
Disconnect
the
four
atcable
assemblies and
the wire
assembly from
the A2
board.
3.
Remove the
four screws
that secure
the A2
board
to
the
stud.
4. Remove the A2 board from the chassis
.
Note
The
ROM and EEPROM on the A2 assembly may be transferred to the new
assembly to minimize the repair time and parts cost. Refer
to \Replacing the
A2 CPU Board Assembly" for more information.
3-12 Assembly Replacement

Agilent Technologies 4339B Specifications

General

Brand	Agilent Technologies
Model	4339B
Category	Measuring Instruments
Language	English