1303 Board Fl Owchart - Sony BDP-S1200 Service Manual

6-5. FR-1301 Board fl owchart
No
Does symptom improve when replace
FR-1303 board?
Yes
Which row of keys do not operate?
Key3 does not operate
OPEN/CLOSE button ->
POWER button -> Key0 does not operate
Reference: Relationship of Buttons and Voltages
Input KEY0
(S700) (S703)
Key_OFF Key_OFF
2.90-3.30
0.00-0.40
POWER OPEN/CLOSE
Key0 does not operate
Is there voltage of about 3.3V at pin 6 No
of CN701 without pressing the keys?
Yes
Check the potential voltage CN701
No
pin6 change from +3.3V to near 0V
when pressing the stop button.
Yes
Replace MB board
No
Does FFC disconnected
Replace MB board
from
CN701 or broken
Yes
Reconnect FFC, if symtoms
donot improve,
FFC NG
No
Does harness disconnected
from Replace MB board
CN701 or broken
Yes
Reconnect FFC, if symtoms
do not improve, replace
FFC
FR-1303 board NG
BDP-S1200/BX120/S3200/BX320/S4200/S5200/BX520
Key3 does not operate
Is there voltage of about 3.3V at pin 5
of CN701 without pressing the keys?
Yes
Check the potential voltage CN701
pin5 change from +3.3V to near 0V
when pressing the stop button.
Yes
Replace MB board
6-6
No
Does harness disconnected No
from Replace MB board
CN701 or broken
Yes
Reconnect FFC, if symtoms
do not improve,
FFC NG
No
FR-1303 board NG