Agilent Technologies 4263B LCR - A1 Main Board Removal; A2 CPU Board Assembly Removal; A5 AC Inlet Board Assembly Removal

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
and
wire
assemblies
from
the
A1
assembly
.
a.
The
four
cable
assemblies
marked
\A",
\B",
\C",
and
\D"
which
are
connected
to
the
UNKNOWN
connectors
on
the
Front
P
anel
b.
The
wire
assembly
which
is
connected
to
the
transformer
c.
The
two
wire
assemblies
which
are
connected
to
the
DC-DC
Converter
d.
The
wire
assembly
which
is
connected
to
the
Ext
DC
Bias
Connector
3.
Remove
the
nut
which
fasten
the
Ext
Trigger
connector
to
the
rear
panel.
4.
Remove
the
four
studs
,
that
secure
the
A1
assembly
to
the chassis
,by
rotating them
with
a
at
bladed
screwdriver
.
5.
Remove
the
three
screws
that
secure
the
A1
assembly
to
the
chassis
.
6.
Remove
the
A1
assembly
from
the
chassis
by
sliding
the
assembly
toward
forward
before
lifting.
A2
CPU
Board
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
assembly
.
3.
Disconnect
the
atcable
assembly
,
which
is
connected
to
the
GPIB
connector
on
the
rear
panel,
from
the
rear
right
side
of
the
A2
assembly
.
4.
Remove
the
four
screws
that
secure
the
A2
assembly
to
the
stud.
5.
Remove the
at
cable
assembly
which
is
connected
to
the
A1
main
board
assembly
on
the
bottom,
while
sliding
the
A2
assembly
toward
front.
6.
Remove
the
A2
assembly
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 assembly
.
2. Disconnect the cable assembly with the 3 pin connector from the A5 assembly.
3. Remove the screw which xes the green and yellow wire connected to the neutral terminal
of the power cable connector to the chassis bottom.
4. Remove the ve screws which secure the A5 assembly to the chassis, from the side.
3-10 Assembly Replacement