VSX-LX50
33
5
6
7
8
5
6
7
8
C
D
F
A
B
E
C
Check the parts and
patterns in the path.
Check the parts and patterns
in the path
f
rom the COAX terminal.
I
C301
(
Pin 42
)
COAX
(
Under side
)
(
1.65
V
center, amplitude more than 0.2
V
p-p
)
Can
observe digital
signal?
N
o
Y
es
N
o
Y
es
Check the parts and patterns
in the path
f
rom the COAX terminal.
I
C301
(
Pin 44
)
Replace
I
C552.
Replace
I
C551.
COAX
(
Upper side
)
(
1.65
V
center, amplitude more than 0.2
V
p-p
)
Can
observe digital
signal?
N
o
Y
es
Check the parts, patterns and
FF
C
in the path
f
rom the OPT
IN
terminal.
I
C301
(
Pins 1,3,5
)
R
E
AR OPT
IN
(
3 inputs
)
(
0
V
⇔
4
V)
Can
observe digital
signal?
N
o
Y
es
Check the parts and patterns
in the path
f
rom the
F
RO
N
T
IN
Assy.
I
C301
(
Pin 7
)
F
RO
N
T OPT
IN
(
0
V
⇔
4
V)
Can
observe digital
signal?
N
o
Y
es
Check the parts and patterns
in the path
f
rom the H
D
M
I
Assy.
I
C301
(
Pin 48
)
H
D
M
I
S
/
P
DIF
IN
(
0
V
⇔
3.3
V)
Can
observe digital
signal?
N
o
Y
es
(D
S
D)
When the source is SAC
D
.
→
Go to Step 4-3-3
•
When a sound is not out
w
ith the XM Radio.
→
Go to Step 4-4
•
When a sound is not out
w
ith the USB
(I
t is assumed that
the
f
ailure diagnosis o
f
USB Assy has been completed.
)
→
Go to Step 4-5
except KU models
I
C101 B4
(
R138
)
N
o
OSC1
N
o
Y
es
Y
es
I
C201
(
Pin 45
)
OSC2
I
C301
(
Pin 30
)
OSC3
S
tep
3:
O
perating
Master
C
lock
To Step 4
I
s there
an operating master
clock signal
(
24.576 MH
z)
?
I
s there
an operating master
clock signal
(
24.576 MH
z)
at
I
C552-pin 4?
Check the parts and
patterns in the path.
N
o
N
o
Y
es
Y
es
I
s there
an operating master
clock signal
(
24.576 MH
z)
?
I
s there
an operating master
clock signal
(
24.576 MH
z)
at
I
C551-pin 5?
I
s there
an operating master
clock signal
(
24.576 MH
z)
at
I
C551-pin 2?
Replace
I
C551
or X551.
Replace
I
C551.
Check the parts and
patterns in the path.
N
o
N
o
Y
es
Y
es
I
s there
an operating master
clock signal
(
24.576 MH
z)
?
I
s there
an operating master
clock signal
(
24.576 MH
z)
at
I
C551-pin 7?
•
When a sound is not out
w
ith the digital
(
COAX, OPT
IN)
signal
input.
→
Go to Step 4-1
•
When a sound is not out
w
ith the analog signal input.
→
Go to Step 4-2
•
When a sound is not out
w
ith the H
D
M
I
.
(I
t is assumed
that
f
ailure diagnosis o
f
H
D
M
I
Assy has been completed.
)
(I
2S path
)
When the source is “dts H
D
Master Audio”, “
D
olby True
H
D
”, “PCM or LPCM at or above the sampling rate o
f
88.2kH
z
” or “LPCM Multi ch”.
→
Go to Step 4-3-1
(
S
/
P
DIF
path
)
When the source is “dts H
D
High Resolution Audio”, “dts
H
D
LBR”, “
D
olby
D
igital Plus”, “2ch at or belo
w
the
sampling rate o
f
48kH
z)
, or “other compression streams”.
→
Go to Step 4-1
S
tep
4:
A
udio
C
lock
(U
ntil
S
witch
)
When the source in the digital
(
COAX, OPT
IN)
or the
H
D
M
I
path is “dts H
D
High Resolution Audio”, “dts H
D
LBR”, “
D
olby
D
igital Plus”, “2ch at or belo
w
the sampling
rate o
f
48kH
z
” or “other compression streams”.
Check that changes by pulling out and inserting the
digital input lines.
(F
unction is able to change the
assignment. There
f
ore it is not speci
f
ied.
)
S
tep
4-1:
When
a
sound
is
not
out
with
the
digital
(COA
X,
OPT IN)
signal
input
•
:
KUXJ and KUXJ
/
CA types only
