Sony BDP-BX58, Service Manual, Page: 100 / 117

9-10
Rem
ote control does not o
perat
e
Check of +3.3V voltage at IC703 pin1?
No
(M
B board)
No
To Power supply flow chart
Y
es
No
Ch
eck
F
FC
d
isc
on
ne
ct
ed
fr
om
CN702 or broken?
Y
es
To I
Fcon section f
low
chart
Check
of
appearance
wavef
orm
during
pressing remote control at IC703 pin2
No
Y
es
Check of +3.3V voltage at CN1201 pin13? Check of +3.3V voltage at CN702 pin11?
No
Replace F
FC
If
sy
m
pt
om
s
do
n
ot
im
pr
ov
e,
Change IF board
Check
of
appearanc
e
wavef
orm
during
pressing remote control at CN1204 pin19(MB board)
Y
es
Y
es
Change IF Board
No
Ch
eck
o
f a
pp
ea
ra
nc
e
wa
ve
fo
am
during pressing remote control at CN702 pin5
No
Replace I
C7
01
If
sy
m
pt
om
s
do
n
ot
im
pr
ov
e,
Change IF board
Ch
ec
k
pa
tte
rn
a
lo
ng
S
IR
CS
lin
e
If
sy
m
pt
om
d
o
no
t i
m
pr
ov
e,
Change IF board
Ch
eck
F
FC
d
isc
on
ne
ct
ed
fr
om
CN702 or broken?
No
Reconnect
FF
C
If
sy
m
pt
om
s
do
n
ot
im
pr
ov
e,
Change FFC
Y
es
Y
es
Change IF Board
Y
es
Ch
ec
k
pa
tte
rn
a
ro
un
d
IC
70
3
If
sy
m
pt
om
d
o
no
t i
m
pr
ov
e,
Change IF board
BDP-BX58/S480/S483/S580