Sony BDP-S780 Service Manual ▷ View online
FL-205 Board flow
ch
a
rt
Pow
er button o
n
the main
unit do
es
not w
o
rk
Key
1
does not o
perate
Does
sy
mpt
o
m
imp
ro
v
e
when replacing
FL-
2
0
5
board?
No
T
o
IF
con section
Is there v
oltage of about 3.3V at pin
3
o
f
CN702
wi
th
out
p
ressin
g
the ke
ys?
No
To
I
F
c
o
n
s
e
ction
Ye
s
Yes
CN3
3
1
pin 1
to ne
ar 0V
wh
en p
ressing
the
pow
e
r button
N
o
Che
ck pa
tt
ern
and
S
331
Check the potential voltage CN702
pin3 change from +3.3V to near 0V
when pressing the stop button.
Ye
s
9-10
Disconnected harness or
FL-
205
boa
rd
replace
change fr
o
m 3.3V
migh
t be
b
roken
fl
o
w
chart
R
e
connect
harn
e
s
s
, if symtoms
do not improve, replace
harness
Does harness disconnected
CN3
31
o
r broken
from
Yes
No
flow
chart
Dis
connect
ed FFC or
FR-313
board
replace
Reco
nnect FFC, if symtoms
do not improve, replace
FFC
Does FFC disconnected
CN702
or broken
from
Yes
Check pattern and S701
might be broken
Yes
Is there v
oltage of about 3.3V at pin
1
of
CN702
wi
th
o
u
t
p
ressin
g
the ke
ys?
T
o
IF
con section
Yes
Check the potential voltage CN702
pin1 change from +3.3V to near 0V
when pressing the stop button.
flow
chart
Dis
connec
ted FFC or
board
replace
Reconnect FFC, if symtoms
do not improve, replace
FFC
Does FFC disconnected
CN702
or
br
o
ken
from
Yes
No
Check pattern and S702
might be broken
Yes
Key
2 does not o
p
e
rate
Is there v
oltage of about 3.3V at pin
2
of
CN702
wi
th
o
ut
p
ressin
g
the ke
ys?
T
o
IF
con section
Yes
Check t
h
e potential voltage CN702
pin2 change from +3.3V to near 0V
when pressing the stop button.
flow
chart
Di
sconnected FFC or
FR-313
board
replace
Re
c
o
n
nect FFC,
if sym
toms
do not improve, replace
FFC
Does harness disconnected
CN7
0
2
or
br
ok
e
n
from
Yes
No
Check pattern and S
703
migh
t be broken
Yes
Key
3
does not operate
N
o
No
No
BDP-S780
No
No
FR-313
FR-313 board flow chart
Does sy
mp
tom
imp
ro
v
e
w
hen
replace
board?
Y
e
s
W
hich
row
of ke
ys do not
op
er
ate?
S
TO
P bu
tt
on
s
->
Ke
y1 does
n
o
t
o
p
er
ate
Ref
erence
: Relation
shi
p of B
u
tt
on
s and
V
ol
tages
OPEN/CLOSE button ->
K
e
y2
does
not oper
ate
P
LA
Y
bu
tton ->
K
ey
3
doe
s not operat
e
Inp
ut
2.90-3
.30
0.00-0.40
KE
Y0
Key_OFF
PO
WER
KEY1
Ke
y_OFF
STOP
KEY2
Ke
y_OFF
O
PEN/CL
OSE
KEY3
Key
_O
FF
PL
AY
No
T
o I
F
co
n sec
tion
fl
ow
c
h
art
R
e
con
nec
t
F
F
C,
if
symptoms
donot improve, replace
FFC
Does FFC disconnected
CN702
or broken
from
Yes
No
FR-313
FR-313 Board Flowchart
V
FD
doe
s n
ot
lig
ht
Is t
here v
ol
tage about
5.8V
at
PS1201?(MB board)
No
Check the +5.8V at CN702 pin7
Is
there t
he FFC d
is
conne
ct
ed
fro
m C
N
70
2?
Is pin5 of I
C
70
2 oscil
lati
ng?
Yes
Is
ther
e i
npu
t of
pu
lse t
o p
ins
7,
8 and
9 of
IC702
?
Yes
Re
pl
ac
e
IC
702
If the symptoms do not improve, repl
ac
e t
he
FR
b
oard
Yes
Yes
Repl
ac
e P
S
120
1(M
B Boa
rd)
If the
sym
ptoms
do not improve
, repl
ac
e
FR
B
oar
d
C
heck
the c
ircuit
s
surro
ung
ing t
he
VF
D DC
D
C
ON
V
ERT
E
R.
Is
th
er
e
vo
lta
ge
a
t CN702 p
in
11?
Re
pl
ac
e
IC
702.
If n
o eff
ect,
re
pl
ac
e t
he
FR B
oa
rd
N
o
N
o
9-11
To IF
con
flowchart
No
No
Check t
he pattern
around
CN1204(MB board)
If the symptoms do not improve, replace MB Board
No
Reconnect the FF
C
If the symptoms do not improve, replace FFC
Y
es
Is
th
er
e v
ol
ta
ge about -25V at JL701?
No
Y
es
Is
the
vol
tage
of
3.3V at IC702 pin 43
and pin13?
No
Y
es
Ch
eck
th
e pa
tte
rn
3
.3
V
li
ne o
f
FR
b
oa
rd
Y
es
To IF
con flowchart
No
Is
th
er
e i
nput pu
ls
e t
o
CN70
2
pi
ns
13,
15
and
16?
To
IF con flow
ch
art
Is
the
FFC disconnect
ed
from CN702?
R
ep
la
ce
F
F
C
. If the symptoms do not
improves, replace FR board
Is
th
ere inp
ut pu
ls
e t
o
CN12
04
pins 13,15 & 16
Reconnect the FFC If the symptoms do not improve, replace FFC
Yes
No
Yes
No
No
Check FFC disconnected from CN702 or broken
Reco
nnect the
FFC
If the symptoms do not improve, change the FR board
Yes
ch
an
ge
FR board
No
BDP-S780
9-12
IR-076 Board Flow Chart
BDP-S780
CTRL-S/IR-IN does not operate
C
hec
k
o
f ap
p
ear
anc
e w
av
ef
o
rm
at
P
in 6,
I
C
1206
d
ur
ing
p
res
s
ing
R
em
o
te C
o
nt
ro
l at
t
he
so
u
rce
d
e
vi
ce
o
f C
T
R
L
-S
/I
R
-I
N
.
C
hec
k o
f
ap
p
ear
anc
e
w
av
ef
o
rm
at
P
in
1,
IC
1206
is
s
am
e as
P
in
6,
IC
1206
d
ur
ing
p
res
s
ing
R
em
o
te C
o
nt
ro
l at
th
e
so
u
rce
d
e
vi
ce
o
f C
T
R
L
-
S/I
R
-I
N
.
Ye
s
T
o
IF
-C
o
n
sect
io
n
f
lo
w
ch
ar
t
Ye
s
C
hec
k o
f
+
3.
3V
v
o
lt
ag
e
at
P
in 6,
IC
1206?
C
hec
k c
o
nnec
ti
o
n
b
et
w
een J
401 and
C
T
R
L
-S
/I
R
-In
s
o
u
rc
e
d
e
vi
ce
.
Ye
s
No
C
hec
k t
he C
o
nnec
to
r f
ro
m
IR
-067b
o
ar
d
, i
s
it
b
ro
ken?
C
hang
e t
he C
o
nnec
to
r.
If
s
y
m
pt
om
do n
ot
im
pr
ov
e
,
c
hang
e I
R
-067
b
o
ar
d
.
Ye
s
No
C
hang
e I
R
-067
B
o
ar
d
.
If
s
y
m
pt
om
do n
ot
im
pr
ov
e
,
c
hec
k c
o
nnec
ti
o
n b
et
w
een
J
401
a
n
d
C
T
R
L
-S
/I
R
-I
n
so
u
rce
d
e
vi
ce
.
No
9-13
Rem
ote control does not o
perate
Check of +3.3V voltage at IC701 pin1?
No
(M
B board)
No
To Power supply flow chart
Y
es
No
Ch
eck
FFC disconnected from
CN702 or broken?
Y
es
To IFcon section f
low
chart
Check of appearance waveform during
pressing remote control at IC701 pin2
No
Y
es
Check of +3.3V voltage at CN1204 pin11?
Check of +3.3V voltage at CN702 pin11?
No
Replace FFC
If symptoms do not improve,
Change FR board
Check of appearance waveform during
pressing remote control at CN1204
pin5(MB board)
Y
es
Y
es
Change FR Board
No
Ch
e
ck
of
appearance wavefoa
m
during pressing remote control
at CN702 pin5
No
Replace IC
70
1
If symptoms do not improve,
Change FR board
Check pattern along SIRCS line
If symptom do not improve,
Change FR board
C
h
e
ck
FFC disconnected from
CN702 or broken?
No
Reconnect
FFC
If symptoms do not improve,
Change FFC
Y
es
Y
es
Change FR Board
Y
es
Check pattern around IC701
If symptom do not improve,
Change FR board
BDP-S780
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