9-3
Pow
er
(Sy
st
em
) F
low
AC
IN
C
hec
k
the
out
put
v
olt
ages
from
the
pow
er
supply
bloc
k.
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
(F
E_U
N
SW
12V)
-
-
N
o
Yes
C
hec
k
the
fus
es
H
av
e
any
of
the
below
fus
es
blow
n?
N
o
M
B
board:
PS301,
PS302
PS1201
-
Yes
C
hec
k
the
follow
ing
pow
er
cont
rol
signals
while
the
pow
er
is
ON
PC
ON
T_C
OR
E:
M
B
board
R
327
PC
ON
T
2
: M
B
board
R1236
PC
ON
T3:
M
B
board
R
305,
R
307,
R
309,
R
343
AT
A_PC
ON
T:
M
B
board
R
376
N
o
Yes
C
hec
k
the
volt
ages
bas
ed
on
the
sc
hem
at
ic
diagram
N
o
Volt
age
lines
that
are
not
out
put
are
short
ed
to
GN
D
N
o
Failure
of
pow
er
supply
IC
->
R
eplac
e
the
IC
R
eplac
e
the
M
B
board
if
there
is
no improvement
C
he
ck
that
the
harness
has
been
ins
ert
ed
properly.
If
there
is
no
problem
, replac
e
the
pow
er
supply
bloc
k.
Re
pl
ac
e
blo
w
n
fu
se
s
Re
pl
ac
e
th
e
MB
bo
ard
if
the
re
is
n
o
impr
ov
em
en
t
To
IF
con
sec
tion
Flow
BDP-BX58/S480/S483/S580