Agilent Technologies 339B Service Manual

A1
Main
Board
Removal
Removal
Procedure
1.
Remove the
A2
CPU
Board
Assembly
referring
to
\A2
CPU
Board
Assembly
Removal".
2.
Disconnect the
following cable
assemblies
from
the
A1
board.
a.
F
our
(or
two
for
Option
001)
cables
connected
to
the
Unknown
connectors
b.
The
cable
assembly
from
the
transformer
c.
Two
cable
assemblies
from
the
DC-DC
Converter
3.
Remove
the
nut
which
fasten
the
Ext
Trigger
connector
on
the
rear
panel.
4.
Remove
the
four
studs
,
that
secure
the
A1
board
to
the
chassis
,
by
rotating them
with a
at
bladed
screwdriver
.
5.
Remove
six
screws
that
secure
the
A1
to
the
chassis
.
6.
Remove
the
A1
assembly
from
the
chassis
.
A2
CPU
Board
Assembly
Removal
Removal
Procedure
1.
Remove
the
cover
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.
A5
A
C Inlet
Board Assembly
Removal
Removal
Procedure
1.
Disconnect
the
cable
assembly
with
the
4
pin
connector
from the
A5 board.
2.
Remove
the
screw
which
xes
the
green and
yellow
wire
connected
to
the
neutral
terminal
of the power cable connector to the bottom of the
chassis.
3. Remove four screws that secure the A5 board to the chassis
.
4. Remove the A5 board from the chassis
.
Keyboard Assembly Removal
Removal Procedure
1. Remove the cover referring to \Cover Removal".
2. Disconnect the two atcable assemblies and the wire assembly from the front side of the A2
board.
3. Remove the two at head screws that secure the front panel from the bottom.
3-10 Assembly Replacement

Agilent Technologies 339B Specifications

General

Brand	Agilent Technologies
Model	339B
Category	Measuring Instruments
Language	English