HP 8753D Option 011

Refer to
Figure 5-7
and carefully
measure the
po
w
er
supply
v
oltages
at
the
fron
t
panel
RF
prob
e
connectors.
Figure PR
OBE5 here.
Figure
5-7.
Front
P
anel
Probe
P
o
w
er
Connector
V
oltages
1.
If
the
correct
v
oltages
are
presen
t,
troublesho
ot
the
prob
e.
2.
If
the
voltages
are
not
presen
t,
c
hec
k
the
+15
V
and
0
12.6
V
green
LEDs
on
A8.
If
the
LEDs
are on,
there
is
an
op
en
b
et
w
een
the
A8
assem
bly
and
the
fron
t
panel
prob
e
p
o
w
er
connectors.
Put
A8
on
to
an
extender
board
and
measure
the
v
oltages
at
the
follo
wing
pins:
A8P2
pins
6
and
36
0
12.6
V
A8P2
pins
4and
34 +15
V
If
the
LEDs
are
o,
con
tin
ue with
\Check
the F
uses
and
Isolate
A8."
DRAFT
3/21/106 15:12
Power Supply Troubleshooting 5-17
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