HP 8753D Option 011

If
the Red
LED on
A15
is
ON
If the
red LED
is
on
or
ashing,
the
p
o
w
er
supply
is
shutting
down.
Use the
following
pro
cedures
to
determine
whic
h
assembly
is causing
the problem.
Check
the A8
Post
Regulator
1.
Switc
h
o
the
analyzer.
2.
Disconnect the
cable A15W1
from the
A8
p
ost
regulator.
See
Figure
5-5
.
3.
Switc
h
on
the
analyzer
and
observ
e
the
red
LED
on
A15.
If
the
red
LED
go
es
out,
the
problem is
probably the
A8 p
ost
regulator.
Con
tin
ue
to
\V
erify the
A15 Preregulator"
to
rst
v
erify
that
the
inputs
to
A8
are
correct.
If
the
red
LED
is
still
on,
the
problem
is
probably
the
A15
preregulator,
or
one of
the
assem
blies
obtaining
p
o
w
er from
it. Con
tinue
with \Chec
k
for
a
F
ault
y
Assem
bly
."
Figure
PWR
CABL5 here.
Figure 5-5.
Po
w
er
Supply
Cable
Locations
DRAFT
3/21/106 15:12
Power Supply Troubleshooting 5-7
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