Agilent Technologies 4395A - Page 229

8.
Check the
A33 EXT
I/O Interface
The A33
EXT I/O
interface
is used
to con
trol the
external instrumen
t
lik
e
the
prin
ter/scanner/handler.
If the
external instrumen
t
is
not
w
orking,
p
erform
the
follo
wing
pro
cedure to
verify
the EXT
I/O
in
terface.
Press
4
PRESET
5
,
4
SYSTEM
5
,
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
SERVICE
MENU
,
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
TESTS
,
4
5
5
,
4
2
5
,
4
x1
5
,
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EXECUTE
TEST
to
run
the
in
ternal
test
52:
24
BIT
I/O
POR
T.
If
the
in
ternal
test
52
passes, the
A33 EXT
I/O in
terface b
oard
is
probably
w
orking.
Insp
ect cables
bet
w
een
the
A1
CPU
and
the
A33
EXT
I/O
in
terface.
If
the
cable
is
go
od,
c
hec
k
the
external
instrumen
t.
If
the
in
ternal
test
52
fails, replace
the A33
EXT I/O
in
terface
b
oard.
Digital Control Troubleshooting 8-11