HP 8753D Option 011

P
ow
er Supply
Check
the Rear
Panel
LEDs
Switch
on the
analyzer. Notice
the condition
of the
t
w
o
LEDs
on
the
A15
preregulator
at
rear
of
the
analyzer.
See
Figure
4-4
.
The
upp
er
(red) LED
should b
e o.
The lo
w
er
(green)
LED
should
b
e
on.
Figure
REARLED4
here.
Figure 4-4.
A15
Preregulator
LEDs
Check
the A8
Post
Regulator LEDs
Remo
ve
the analyzer's
top co
v
er.
Switc
h
on
the
p
o
w
er.
Insp
ect
the
green
LEDs
along
the
top
edge
of
the
A8
p
ost-regulator
assem
bly
.
All
green
LEDs
should
b
e
on.
The
fan
should
b
e
audible.
In case of dicult
y, refer to Chapter 5,
\Power Supply T
roublesho oting."
DRAFT
3/21/106 15:12
Start Troubleshooting Here 4-9
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