Agilent Technologies 4395A Service Manual

FIND
OUT WHY
THE A50
SHUTDO
WN
LED
IS
OFF
Use this
pro cedure
when
the
fan
is
rotating.
If
the
fan
is
not
rotating,
see the
FIND OUT
WHY
THE
F
AN
IS
NOT
ROT
ATING
.
If
the
fan
is
rotating
and the
A50 SHUTDO
WN LED
is o,
the problem
may
be
in
the
A50
DC-DC Con
verter
and an
yof
assem
blies
obtaining
the
p
o
w
er
from
+5
VD
supply
and
the
higher
p
o
w
er
supplies.
1.
Disconnect
the
Cable
from
the
A1J10
T
urn
the
analyzer
p
o
wer
o. Disconnect
the cable
from A1J10.
T
urn
the
analyzer
p
o
w
er
on.
If
the A50
SHUTDOWN
LED
go
es
on,
replace
the
A1
CPU.
If
the
A50
SHUTDO
WN
LED
is
still
o,
the
A1
CPU
is
v
eried.
Turn
the analyzer
po
w
er
o
and
reconnect
the
cable
to
the A1J10.
Contin
ue with
the
next
R
emove
Assemblies
.
2.
Remo
v
e
Assemblies
a.
T
urn
the
analyzer
p
o
w
er
o.
b.
Remo
v
e
the
assem
blies,
A2,
A3,
A5,
A7,
A8 and
A51.
c.
T
urn
the
analyzer
p
o
w
er
on.
If
the
A50 SHUTDO
WN LED
is
still
o,
insp
ect
the
A20
motherb
oard
for
soldering
bridges
and
shorted
traces
on
the
F
AN
PO
WER
and
the F
AN
LOCK
signal
paths.
If
the
A50
SHUTDO
WN
LED
go
es
on,
the
A20
motherb
oard
are
v
eried.
Con
tin
ue with
the
next step.
d.
Reinstall
eac
h
assem
bly
one
at
a
time. T
urn
the
analyzer
p
o
w
er
on
after
eac
h
is
installed.
The
assem
bly
that
causes
the
A50
SHUTDO
WN
LED
to
go
o
is
the
most
probable fault
y
assembly
.
Replace
the
assem
bly
.
If
no
assem
bly
mak
es
the
A50
SHUTDO
WN
LED
o,
con
tin
ue
with
the
next Disc
onnect
the
Cable
fr
om
the
A9J2
.
3.
Disconnect
the
Cable
from
the
A9J2
T
urn
the
analyzer
p
o
w
er
o
and
reinstall all
of assem
blies. Disconnect
the cable
from
the
A9J2
and
turn
the
analyzer
p
o
w
er
on.
The
lo
cation
of
the
A9J2
is
shown
in the
Figure 7-5
.
If
the
A50
SHUTDO
WN
LED
go
es
o,
the A9
is
fault
y
.
Replace
the
A9
assem
bly
.
Power Supply Troubleshooting 7-7

Agilent Technologies 4395A Specifications

General

Brand	Agilent Technologies
Model	4395A
Category	Measuring Instruments
Language	English