Sony BDP-BX2 - Page 97

9-8
BDP-BX2/S360
FL/FR Board flowchart (1/3) Power button on the main unit does not wor
k
Ke
y
1 does not o
p
erat
e
Does symptom improve when replacing the FL board?
No
To IFcon section flowchart
Is there voltage of about 3.3V at pi
n
13 of CN701 without pressing the ke
y
s?
No
To IFcon section flowchart
Yes Yes
The potential of pin 1 of CN331 doe
s
not change from 3.3V to near 0V when
p
ressin
g
the
p
ower butto
n
No
Check pattern and S331 might be broken.
Check the resistance of resistors o
f
Key1 line. Also check the surrounding
p
attern.
Yes
Disconnected harness or replace F
L
board. Ke
y
o
p
erations cannot be made o
n
Ke
y
2 does not o
p
erat
e
Does symptom improve when replacing the FR board?
No
To IFcon section flowchart
Is there voltage of about 3.3V at pi
n
14 of CN701 without pressing the ke
y
s?
No
To IFcon section flowchart
Yes Yes
Which row of keys do not operate?
Reference: Relationship of Buttons and Voltages
Check the resistance of resistors o
f
Key2 line. Also check the surrounding
p
attern.
STOP buttons -> To Ke
y
1 does not o
p
erat
e
OPEN/CLOSE button -> To Ke
y
2 does not o
p
erat
e
PLAY button -> To Ke
y
3 does not o
p
erat
e
Ke
y
3 does not o
p
erat
e
Is there voltage of about 3.3V at pi
n
15 of CN701 without pressing the ke
y
s?
No
To IFcon section flowchart
Yes
Check the resistance of resistors o
f
Key3 line. Also check the surrounding
p
attern.
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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