IF
co
n
Secti
o
n
F
lo
w
Ch
art(2/
2)
C
h
ec
k of IFc
o
n res
et
in
p
ut
p
or
t
Is
th
e v
ol
tage of
IC
12
03
"H"(3.3V)?
No
Is
the
re
a
pr
ob
le
m w
ith
th
e mo
un
tin
g
co
nd
itio
n o
f
R1212
, C122
1 or R1208
?
Ye
s
Y
es
P
co
nt output por
t c
h
ec
k
Check
of each pow
er supp
ly
control
port
wh
en
th
e p
owe
r i
s O
N
* Co
rrespon
d
in
g
o
u
tp
u
t
IC120
3 pi
n15 PCONT
1
IC
1203 pi
n 17PCO
N
T2
IC
12
03 pi
n21 PCO
N
T3
IC
12
03
p
in
23
P
C
ON
T_
C
O
R
E
IC1203
pi
n24 AT
A_PCONT1
SW
3.
3V and SAT
A
_
1.
2VA
out
put
CORE_1.1V output
DDR2_1
.8V sy
stem output
D
C
SW
5V
FE_
S
W
5V
No
Check f
or shorts at each port
No
A
ll the
po
rt
s go
"
H
" w
ithi
n 2
to
10
ms, bu
t
soon go "L"
No
Do the sy
mptoms i
m
prov
e after checki
ng
the
sol
deri
ng and pat
tern of
IC
12
03
?
No
Pow
er supp
ly
ou
tpu
t check
Check t
he out
put
of
th
e correspondi
ng
vo
lta
ge
SW3.3V Short circui
t op
era
tion
check
No
To
Pow
er Suppl
y (Sy
stem) fl
ow
chart
No
Wh
en
IC
1203
pi
n15 PCO
N
T1
has gone
"H",
is
th
e S
W
3.
3V
v
olt
ag
e o
ut
pu
t?
Ye
s
Rep
lace
IC
12
03
or repl
ace the M
B
boar
d
Ye
s
Ch
eck SY
S_RST
sig
n
al
o
u
tp
u
t
Is
IC
12
03
p
in
51
"H"(3.3V)?
Th
e m
ount
ing condi
tio
n of
R1156
are OK?
No
Repl
ace
IC
12
03
and the M
B
boar
d
Ye
s
C
h
ec
k the
c
o
m
m
unic
at
ion w
ith the
hos
t
CPU (SY
S
CO
N_REQ
si
gn
al ch
eck)
Do cy
cl
ic
al
"H" and "L" communi
cat
io
n
w
av
eforms come to
IC
1203
pi
n30
?
No
Is
there
a prob
le
m w
ith the mounti
ng
condi
ton of
R126
2
?
No
Do the sy
mptoms i
m
prov
e after repl
aci
ng
IC
10
1?
No
Ye
s
Ch
eck th
e co
mmu
n
ic
ati
o
n
w
ith
th
e h
o
st
CPU
(Seri
al
co
mmu
n
ic
ati
o
n
si
g
na
l c
h
ec
k)
Do cy
cl
ic
al
"H" and "L" communi
cat
io
n
w
av
eforms come to
IC
1203 pi
n47,
p
in
48
and pin49
?
No
Is
th
ere a probl
em w
ith
th
e mount
ing
condi
ton of
RB124
0,
R1243 a
nd
R1246
No
Repl
ace I
C
1203 or repl
ace t
he M
B
board
Is
th
e v
olt
ag
e a
t t
he
"
H
" le
ve
l(3
.3
V
)?
SW3.3V and SW5V
1.
2VA and CORE_1.1V
DAC3.3V, 3.3VA
DCDC6V, DCDC4V
FE_SW
12V nad FE_SW5V
A
B
9-5
IC1203 pi
n2
AT
A_PCONT2
Ye
s
Ye
s
Ye
s
Ye
s
Replace IC1203 or replace MB board
BDP-BX38/S280/S380/S383
/
