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P
ower
Su
pp
ly Boar
d
Figure 4-4 gives α general view
o
f the
P
ower Supply Board, showing
voltage test
p
oints at the
l
ower
l
eft corner .
In the diagram t he double dashed line across the
b
oard divides the
the
P
rimary
a
nd Secondary Sections of the
P
ower Supply .
Η
P
OW ER
CO NNE
OR
χ
F
Η4
1
R
AND
LINE
Ο
F
I L TER
GROUNDING
σ -5 .2V
Ο
0407[
ο +5ν
σ-12V
o+12V
ο-32V
σ+32 V
FN326-6 1
SC
R
EW
CΤ1 F
Έ
r 407
CR
401
0411
ΟAGND
J401
F
igu
r
e 4-4. T
h
e
P
owe
r
S
u
p
p
ly
B
oard
HP 811 OA Service G
u
i
d
e
DS401 TEMP . Ο
F
AIL LED
DS402
F
AN DOWN / Ο ,%
OVERLQAD LED
,,
P
O
WER
S
UPPL
Y
B
OA
R
D
ΝΟ:081 10
66504
T
r
o
ub
les
h
ooting 4-7
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