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9-3
Pow
er (Sy
s
tem) F
low
AC
I
N
C
h
eck
the
output
v
olt
ages f
ro
m t
he pow
er
s
upply
bloc
k
at main board.
C
N
301
pin
1:
+12V (U
N
SW
12V)
C
N
301 pin 2:
+12V (U
N
SW
12V)
C
N
301 pin
3:
+12V (FE_U
N
SW12V)
-
-
No
Yes
Ch
e
ck t
he
fu
se
s
Ha
v
e any
of
t
he
below
f
u
se
s
blow
n?
No
M
B board:
PS301,
PS302
Yes
Ch
e
ck
th
e
f
o
llow
ing
p
ow
er cont
rol signal
s
w
hile
the
pow
er is ON
PCONT1#
: M
B board
R
396, R397
Yes
C
he
c
k
t
he v
olt
ages
based on
the
s
che
m
at
ic
diagram
No
Vol
tage lines
that
are not
out
put
are short
ed
to
G
N
D
No
Failure o
f pow
er s
upply
I
C
->
R
eplac
e
th
e
I
C
R
eplac
e t
he MB board if
t
here is no
improvement
C
he
ck th
a
t th
e
harness
has
been
ins
ert
ed
properly.
I
f
there
is
no
problem
, replac
e t
he
pow
er s
upply
block
.
Re
plac
e bl
ow
n f
us
es
Re
place the
MB b
oard if the
re
is n
o
impr
ove
me
nt
BDP-BX59/S590/S490
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