HP 8753D Option 011

Intermittent
Problems
PRESET
states
that
app
ear
sp
ontaneously
(without pressing
4
PRESET
5
)
t
ypically
signal
a
p
ow
er supply
or A9
CPU problem.
Since the
A9
CPU
assem
bly
is
the
easiest
to
substitute,
do so.
If
the
problem
ceases,
replace
the
A9.
If
the
problem
con
tinues,
replace the
A15
preregulator
assem
bly
.
5-20 Power Supply Troubleshooting DRAFT
3/21/106 15:12
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