Sony BDP-BX38 / BDP-S280 / BDP-S380 / BDP-S383 Service Manual ▷ View online
9-7
V
ide
o se
cti
on
fl
ow
cha
rt
R
epr
oduced vi
deo does not
appea
r r
ight
Ye
s
Is
the
FL d
isp
la
y/L
E
D d
isp
la
y co
rr
ect?
No
To M
ai
n f
low
cha
rt
Ye
s
Is the drive o
p
erating pro
perly?
No
T
o Driv
e f
lo
wc
ha
rt
Yes
Ch
eck t
he
in
pu
t p
owe
r
No
IC
1003 pi
n 13 :+
5V
Yes
A
re
vide
o sign
al
s inpu
t t
o I
C
10
03
No
Ch
ec
k t
he
writ
tin
g f
ro
m
IC1
01
Pi
n1 C
VBS s
ignal
Pi
n3 Y
s
ignal
Y
es
A
re
con
tr
ol sig
na
ls in
pu
t t
o I
C
10
03
?
No
C
hec
k the w
ritti
ng f
rom
IC
101
IC
100
3 p
in6
and pin7(
M
U
TE1 & MUTE2)
( +3
.3V)
Y
es
Is
a v
ideo s
ignal
output f
rom
IC
1003
?
No
Re
pla
ce
IC1
00
3
Y
es
Is
a s
ignal
output f
rom
eac
h Vi
deo output
conn
ec
to
r?
No
C
he
ck out
put
r
esi
stor
s
(
R1031
,R1030
,R102
9,R1032,R1033,R1034,R1035
and
R1
028,R1043,R1044,R1045,R1046)
C
he
ck t
he
p
in
ja
ck b
lo
ck
BDP-BX38/S280/S380/S383
T
o Power (System)
fl
ow
ch
ar
t
P
in
14 C
VBS
si
gnal
Pi
n1
2 Y
si
gn
al
FL-203 Board flow
chart
Pow
er button on the main unit does not w
ork
Key
1 does not o
perate
Does sy
mptom
impr
ov
e
when replacing
FL-203
board?
No
T
o IF
con section
Is there v
oltage of about 3.3V at pin
3
of
CN702
w
ithout
pressin
g the ke
ys?
No
T
o IF
con section
Yes
Yes
CN331
pin 1
to near 0V w
hen pressing
the pow
er button
No
Check pattern and S331
Check the potential voltage CN702
pin3 change from +3.3V to near 0V
when pressing the stop button.
Yes
If-170 IF board flow chart
Does sy
mptom
impr
ov
e w
hen replace
IF-170
board?
Yes
W
hich row
of key
s do not operate?
STOP
b
utto
ns ->
Key
1 does
not oper
ate
Reference: Relationship of Buttons and Voltages
OPEN
/C
LOSE button -
>
Key
2 does
not oper
ate
PLAY button ->
Key
3 does not operate
Input
2.90-3.30
0.00-0.40
KEY0
Ke
y_OFF
POWER
KEY1
Ke
y_OFF
STOP
KEY2
Ke
y_OFF
OP
EN/CLO
SE
KEY3
Ke
y_OFF
PL
AY
9-8
Disconnected harness or
FL-203
board
replace
BDP-BX38/S280/S380/S383
change from
3.3V
might be broken
flo
w
chart
Reconnec
t harness
, if symtoms
do not improve, replace
harness
Does harness disconnected
CN331
or broken
from
Yes
No
No
T
o IF
con section
flo
w
chart
Reconnec
t FFC, if symtoms
donot improve, replace
FFC
Does FFC disconnected
CN702
or broken
from
Yes
No
flow
chart
Disconnected FFC or
IF-170
board
replace
Reconnect FFC, if symtoms
do not improve, replace
FFC
Does FFC disconnected
CN702
or broken
from
Yes
Check pattern and S703
might be broken
Yes
Is there v
oltage of about 3.3V at pin
2
of
CN702
w
ithout
pressin
g the ke
ys?
T
o IF
con section
Yes
Check the potential voltage CN702
pin2 change from +3.3V to near 0V
when pressing the stop button.
flow
chart
Disconnected FFC or
IF170
board
replace
Reconnect FFC, if symtoms
do not improve, replace
FFC
Does FFC disconnected
CN702
or broken
from
Yes
No
Check pattern and S702
might be broken
Yes
Key
2 does not o
perate
Is there v
oltage of about 3.3V at pin
2
of
CN702
w
ithout
pressin
g the ke
ys?
T
o IF
con section
Yes
Check the potential voltage CN702
pin2 change from +3.3V to near 0V
when pressing the stop button.
flow
chart
Disconnected FFC or
IF -170
board
replace
Reconnect FFC, if symtoms
do not improve, replace
FFC
Does harness disconnected
CN702
or broken
from
Yes
No
Check pattern and S701
might be broken
Yes
Key
3 does not o
perate
No
No
No
IF-170 Board f
low
chart
(
FLD
does not
light
Is t
here v
ol
tage about
5.8V at
PS1201?(MB board)
No
Check the +5.8V at CN702 pin7
Is
there the FFC disconnected from CN702?
Is pin5 of I
C702 oscil
lati
ng?
Yes
Is t
here i
nput of pul
se t
o pins 7, 8 and 9 of
IC
702?
Yes
Repl
ac
e IC70
2
If the symptoms do not improve, re
pl
ac
e t
he
IF
bo
ard
Yes
Yes
Replace PS1201(MB Board) If the symptoms do not improve, replace IF Board
Check t
he
ci
rcuit
s surrou
ng
ing t
he FLD
D
D
CO
NVERT
ER.
Is there voltage at CN702 pin11
?
Repl
ace IC
702. I
f no eff
ect,
repl
ace t
he
IF B
oa
rd
No
No
9-9
BDP-BX38/S280/S380/S383
To IF con flowchart
No
No
Ch
ec
k
th
e
pa
tte
rn
a
ro
un
d CN1204(MB board)
If the symptoms do not improve, replace MB Board
No
Reconnect the FFC If the symptoms do not improve, replace FFC
Yes
Is
there voltage about -25V at JL701?
No
Y
es
Is t
he v
ol
tage of 3.3V at IC702 pin 43
and pin13?
No
Y
es
Check the pattern 3.3V line of IF board
Yes
To IF con flowchart
No
Is
the
re inp
ut pu
lse to CN702
pins 13, 15 and 16?
To IF con flowchart
Is t
he FFC disconnected
from CN702?
Re
pl
ac
e FFC
. If the symptoms do not
improves, replace IF board
Is
the
re inp
ut pu
lse to CN1204
pins 8, 9 and 11?
Reconnect the FFC If the symptoms do not improve, replace FFC
Yes
No
Yes
No
No
Check FFC bB connected from CN702 or broken
Reconnect the FFC If the symptoms do not improve, changed the IF board
Yes
ch
an
ge
IF board
No
9-10
BDP-BX38/S280/S380/S383
Rem
ote control does not o
perate
Check of +3.3V voltage at IC703 pin1?
No
(M
B board)
No
To Power supply flow chart
Y
es
No
Ch
ec
k FFC disconnected from
CN702 or broken?
Y
es
To IFcon section f
low
chart
Check of appearance waveform during pressing remote control at IC703 pin2
No
Y
es
Check of +3.3V voltage at CN1201 pin13?
Check of +3.3V voltage at CN701 pin11?
No
Replace FFC If symptoms do not improve, Change IF board
Check of appearance waveform during pressing remote control at CN1204 pin19(MB board)
Y
es
Y
es
Change IF Board
No
Ch
ec
k of appearance waveform
during pressing remote control at CN702 pin5
No
Replace IC701 If symptoms do not improve, Change IF board
Check pattern along SIRCS line If symptom do not improve, Change IF board
Ch
ec
k FFC disconnected from
CN702 or broken?
No
Reconnect
FFC
If symptoms do not improve, Change FFC
Y
es
Y
es
Change IF Board
Y
es
Check pattern around IC703 If symptom do not improve, Change IF board
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