Agilent Technologies 4395A Service Manual

TROUBLESHOOT
THE A51
GSP and
A52
L
CD
Use
this
pro cedure
when the
LCD(Liquid Crystal
Display)
is unacceptable,
or not
being
brigh
t.
1.
Run
the
Internal
T
est
3:
A51
GSP
.
The
A51 GSP
can
b
e
c
hec
k
ed
using
the
in
ternal
test
3:
A51
GSP
,
if
the test
fails, the
4
Ch
1
5
and
4
Ch
2
5
LEDs
blink
sev
eral
time
and
a
few
b
eeps
sound at
the end
of the
test. Then
the
analyzer
returns
the con
trol settings
to the
po
w
er-on
default
setting
v
alues.
a.
Press
4
PRESET
5
, 4
SYSTEM
5
,
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
N
NN
NN
NN
SERVICE
MENU ,
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
TESTS
, 4
3
5
, 4
x1
5
,
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
N
NN
NN
NN
EXECUTE
TEST to
run the
in
ternal
test
3.
When
this
test
starts,
4
Ch
1
5
LED
and
4
Ch
2
5
LED
are
turned
o.
b.
Chec
k
the
4
Ch
1
5
and
4
Ch
2
5
LEDs
and
the
b
eeps
at
the
end
of the
test.
If no
beep
sound and
the
LEDs
don't
blink,
the
A51
GSP
is
probably
w
orking.
Con
tin
ue
with
the
next
Che
ck
the
Two
LEDs
on
A51
GSP.
If
a
b
eep
sounds
and
the
LEDs
blink
one
time,
the
A51
GSP
chip
is
fault
y
.
Replace
the
A51
GSP
.
If t
w
o
b
eep
sound
and
the
LED
blinks
t
w
o
time,
the
A51
GSP's
DRAM
is
fault
y.
Replace
the
A51
GSP.
If
three
b
eep
sound
and
the
LED
blinks
three
time,
the
A51 GSP's
VRAM is
fault
y
.
Replace
the
A51
GSP
.
2.
Check
the
A52 L
CD(Liquid
Crystal
Displa
y)
The
A52
LCD can
b
e
tested
using
the
in
ternal
test
70
to
74.
a.
Press
4
PRESET
5
,
4
SYSTEM
5
,
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
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
N
N
N
TESTS
,
4
7
5
,
4
0
5
,
4
x1
5
,
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EXECUTE
TEST
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
CONTINUE
to
run
the
in
ternal
test
70,
and
run the
other tests
with
the
same
manner.
b.
If
an
y
defects
on
the
LCD,
replace
the
LCD.
c. If
no
correct
patterns
are
displa
y
ed,
c
hec
k
the
A54
In
v
erter.
8-12 Digital Control Troubleshooting

Agilent Technologies 4395A Specifications

General

Brand	Agilent Technologies
Model	4395A
Category	Measuring Instruments
Language	English