Simplified
Block Diagram
Figure 5-1
shows
the
p
o
w
er
supply
group
in
simplied
blo
c
k diagram
form. Refer
to the
detailed
blo
c
k
diagram
of
the p
ow
er supply
(Figure
5-8)
lo cated
at the
end
of
this
c
hapter
to
see
voltage
lines and
specic
connector pin
num
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
kthet
wopo
wer
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 switc
h. See Figure 5-2. During normal op eration, the
bottom (green) LED is on and the top (red) LED is o. If these LEDs are normal, then
A15
is 95% v
eried. Con
tinue 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
Power Supply Troubleshooting 5-3
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
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