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
three
cable
assemblies
marked
\A",
\B",
and
\C"
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
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
.
5.
Slide
the
A5
assembly
toward
the
right
to
remove
the
switch
on
the
A5
assembly
from
the
line
switch
plate
slot.
3-10
Assembly
Replacement
