
Simplified
Block
Diagram
Figure
5-1
sho
ws
the
p o
w
er
supply
group
in
simplied
blo
c
k
diagram
form.
Refer
to
the
detailed
blo
c
k
diagram
of
the
p o
w
er
supply
( Figure
5-8)
lo
cated
at
the
end
of
this
c
hapter
to
see
v
oltage
lines
and
sp ecic
connector
pin
n
um
b ers.
Figure
BLOCK5
here.
Figure
5-1.
P
o
w
er
Supply
Group
Simplified
Block
Diagram
Start
Here
Check
the
Green
LED
and
Red
LED
on
A15
Switch
on
the
analyzer
and
lo
ok
at
the
rear
panel
of
the
analyzer.
Chec
k
th
e
t
w
o
p o
w
er
supply
diagnostic
LEDs
on
the
A15
preregulator
casting
b
y
lo
oking
through
the
holes
lo
cated
to
the
left
of
the
line
v
oltage
selector
switch.
See
Figure
5-2 .
During
normal
op eration,
the
b ottom
(green)
LED
is
on
and
the
top
(red)
LED
is
o.
If
these
LEDs
are
normal,
then
A15
is
95%
v
eried.
Con
tin
ue
to
\Chec
k
the
Green
LEDs
on
A8."
If
the
green
LED
is
not
on
steadily
,
refer
to
\If
the
Green
LED
on
A15
is
not
ON
Steadily"
in
this
pro cedure.
If
the
red
LED
is
on
or
ashing,
refer
to
\If
the
Red
LED
on
A15
is
ON"
in
this
pro cedure.
DRAFT
3/21/106
15:12
P
o
w
er
Supply
Troubleshooting
5-3
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