VSX-LX50
53
5
6
7
8
5
6
7
8
C
D
F
A
B
E
B
Step
2-2:
R
eset
IC501
(Pin
22)
RXRST
B-1
Is
the
voltage
"H"
(3.3
V)?
Check
the
parts
and
patterns
in
the
path.
If
IC501
or
IC502
is
failure,
replace
IC501
or
IC502.
Yes
A
L105
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
R
x
)
Check
the
L105.
If
L105
is
failure,
replace
L105.
Yes
3.3V
_R
X1
3.3V
_R
X2
L106
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
R
x
)
Check
the
L106.
If
L106
is
failure,
replace
L106.
Check
the
IC902
or
Q901
or
L902
or
D901.
If
IC902
or
Q901
or
L902
or
D901
is
failure,
replace
IC902
or
Q901
or
L902
or
D901.
Yes
C912,
C913
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI)
Yes
L104
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI
R
x
)
Check
the
L104.
If
L104
is
failure,
replace
L104.
Yes
V+1
R
8
L301
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
T
x
)
Check
the
L301.
If
L301
is
failure,
replace
L301.
Yes
1.8V
_R
X1
V+1
R
8
R
X
L303
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
T
x
)
Check
the
L303.
If
L303
is
failure,
replace
L303.
Yes
V+3
T
X
L302
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI
T
x
)
Check
the
L302.
If
L302
is
failure,
replace
L302.
Yes
Yes
V+1
R
8
T
X
3.3V
_T
X1
L304
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI
T
x
)
Check
the
L304.
If
L304
is
failure,
replace
L304.
1.8V
_T
X1
Step
2-3:
Source
5V
*
When
connected
the
source
e
q
uipment
to
IN1.
IC501
(Pin
25)
TXRST
B-2
Is
the
voltage
"H"
(3.3
V)?
Check
the
parts
and
patterns
in
the
path.
If
IC501
or
IC502
is
failure,
replace
IC501
or
IC502.
Yes
L305
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI
T
x
)
Check
the
L305.
If
L305
is
failure,
replace
L305.
Yes
1.8V
_ T
X2
No
No
L101
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
R
x
)
Check
the
L101.
If
L101
is
failure,
replace
L101.
Yes
V+3
R
X
L103
Is
the
voltage
3.3
V?
No
3.3
V
(HDMI
R
x
)
Check
the
L103.
If
L103
is
failure,
replace
L103.
Yes
V+3
R
A
L102
Is
the
voltage
1.8
V?
No
1.8
V
(HDMI
R
x
)
Check
the
L102.
If
L102
is
failure,
replace
L102.
Yes
Check
the
patterns,
JA101
in
the
path.
If
JA101
is
failure,
replace
JA101.
JA101
(Pin
18)
Is
the
voltage
"H"
(5
V)?
No
V5R0
(HDMI
IN1)
Yes
C-1