Pioneer VSX-LX70 Service Manual page 34

1
Step 5
W
A
SCK
R121
No
Is there
a bit clock?
Yes
u
IC201 (Pins 63, 76)
No
Is there
a bit clock?
B
Yes
X
R122 LCK
No
Is there
an L/R clock?
Yes
v
IC201 (Pins 61, 78)
C
Is there No
an L/R clock?
Yes
Y
R123
DATA
Are there
No
data coming
in?
D
Yes
Y
IC201 (Pin 1)
Are there No
data coming
in?
Yes
To Step 6
E
F
34
1
2
The 1st DSP Block is in failure.
Proceed to Step 7.
Check the resistors and patterns
in the path.
The 1st DSP Block is in failure.
Proceed to Step 7.
Check the resistors and patterns
in the path.
The 1st DSP Block is in failure.
Proceed to Step 7.
Check the resistors and patterns
in the path.
2
3
Step 6
Z
R206
Is there
a bit clock?
Yes
a
CN402 (Pin 10)
Is there
a bit clock?
Yes
b
R208
Is there
an L/R clock?
Yes
c
CN402 (Pin 8)
Is there
an L/R clock?
Yes
d
R221
Are there
data coming
in?
Yes
e
CN402 (Pin 12)
Are there
data coming
in?
Yes
Check the paths in the DIGITAL MOTHER Assy.
VSX-LX70
3
4
SCK
No
The 2nd DSP Block is in failure.
Proceed to Step 8.
No
Check the resistors and patterns
in the path.
LCK
No
The 2nd DSP Block is in failure.
Proceed to Step 8.
No
Check the resistors and patterns
in the path.
DATA
No
The 2nd DSP Block is in failure.
Proceed to Step 8.
No
Check the resistors and patterns
in the path.
4