Sony BDP-S186 - Page 92

White LED does not light
Yes
Is there voltage of about 3.3V voltage at
Base Q720?
No
Yes
Check +5V voltage at CN1002 pin9?
No
Yes
Check if FFC broken or disconnected from CN701
No
Yes
Reconnect FFC. If symptoms do not improve, replace FFC
Check of +3.3V voltage at CN701 pin1?
No
Yes
Yes
Yes
Replace IF Board.
No
Chech IC101 AA5
Check pattern around CN1002 of MB Board.
If symptoms do not improve, replace MB board.
9-8
BDP-BX18/S185/S186
Check +5V voltage at CN701 pin9?
Check if FFC broken or disconnected from CN701
Yes
Reconnect FFC. If symptoms do not improve, replace FFC
Check of +3.3V voltage at R720?
No
Replace R720. If symptoms do not improve, replace FR board
Check polarity of D720(LED) Is reverse polarity occurs?
No
Check pattern around D720(LED),
If symptoms do not improve, change IF board.
Replace D720. If symptoms do not improve, replace IF board
Check pattern around D720(LED),If symptoms do not improves, change IF board
Replace Q720. If symptoms do not improve, replace IF board
Is there voltage of about 3.3V voltage at
Collector Q720?
Check polarity of D720(LED) Is reverse polarity occurs?
Replace D720 If symptoms do not improve, change IF board
Yes
Yes
No
No
No