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
