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W
hit
e LED
does
not
lig
ht
Is
there
vol
tag
e of
about
58V
at
PS1201?
Ye
s
Is
there
vol
tag
e of
about
3.3V
voltage at
Base Q709?
No
Ye
s
No
Check +5
8V voltage at CN1204 pin16?
No
Ye
s
Check if FFC broken or disconnected from CN702
No
Ye
s
Reconnect FFC. If symptoms do not improve, replace FFC
Check of +3.3V voltage at CN702 pin10?
No
Ye
s
Ye
s
Ye
s
Replace
IF
Board.
No
To IFCon flowchart
Check
pattern around C
N1
20
4 of
M
B
Board.
If symptoms do not improve, replace MB board.
9-11
(MB board)
Replace PS1201(MB board) If symptoms to not improve replace IF board If symptoms still do not improve, replace MB board
Check +5.8V voltage at CN702 pin7?
Ye
s
Check if FFC broken or disconnected from CN702
Ye
s
Reconnect FFC. If symptoms do not improve, replace FFC
Check of +3.3V voltage at R718?
No
Replace R718. If symptoms do not improve, replace FR board
Check polarity of D709(LED) Is reverse polarity occurs?
No
Check
pattern around D
70
9(L
ED
),
If symptoms do not improve, change IF board.
Replace D709. If symptoms do not improve, replace IF board
Check pattern around D709(LED),If symptoms do not improves, change
F board
Replace Q709. If symptoms do not improve, replace
F board
Is
there
vol
tag
e of
about
3.3V
voltage at
Collector Q709?
Check polarity of D709(LED) Is reverse polarity occurs?
Replace D709 If symptoms do not improve, change IF board
Ye
s
Ye
s
No
No
No
BDP-BX58/S480/S483/S580