VSX-LX50
31
5
6
7
8
5
6
7
8
C
D
F
A
B
E
N
o
Replace
I
C903.
The output and G
ND
may be short-
circuited. Check the path bet
w
een
them.
Y
es
I
s
I
C903
abnormally hot?
A
B
Replace the XM antenna.
I
nstall a XM antenna
Remove the XM antenna
I
C502
(
Pin 5
)
I
s the
voltage more
than 5
V
?
N
o
Y
es
Replace the XM antenna.
C
N
501
(
Pin 1
)
I
s the
voltage more
than 5
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C901
(
Pins 7,8
)
D
C-
D
C Converter
L907
(
Stby
)
side
I
s the voltage
around 5.2
V
?
N
o
Y
es
I
s the voltage
3.3
V
?
N
o
Y
es
L906
Replace
I
C901
1st
D
SP 1.2
V
I
s the voltage
1.2
V
?
N
o
Y
es
I
C101
(
B7
(
L103
)
, etc.
)
Check the parts and patterns
in the path.
3.3
V
Regulator
I
s the voltage
1.2
V
?
N
o
Y
es
I
C903
(
Pins 3,4
)
Check the parts and patterns
in the path.
I
s the voltage
around 5.2
V
?
N
o
Y
es
I
C903
(
Pin 5
)
Check the parts and patterns
in the path.
I
C103
(
Pin 20
)
LATCH1
I
s the voltage
3.3
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C104
(
Pin 20
)
LATCH2
I
s the voltage
3.3
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C105
(
Pin 8
)
D
ecoder
I
s the voltage
3.3
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C106
(
Pin 37
)
F
LASH ROM
I
s the voltage
3.3
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C107
(
Pins 9,27
)
SRAM
I
s the voltage
3.3
V
?
N
o
Y
es
Check the parts and patterns
in the path.
I
C109
(
Pin 5
)
Logic
I
C
I
s the voltage
3.3
V
?
N
o
Y
es
•
:
KUXJ and KUXJ
/
CA types only
N
o
Replace
I
C502.
Check the po
w
er output
o
f
the main unit.
Y
es
C
N
501
(
Pin 1
)
XM Jack
I
s the voltage
around 5.2
V
?
N
o
Y
es
I
s the
voltage o
f
I
C502-pin 1
around 5.2
V
?