33
SC-LX81
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 4: Audio Signal
Check the signal path.
IC2
8
01 (Pin 73)
N
o
Y
Check the signal path.
Check the signal path.
Check the signal path.
Check the signal path.
IC2701 (Pins
8
9,134) MCLK
MCLK
BCK
LRCK
DATA
N
o
Yes
Yes
IC2701 (Pin 93)
N
o
Z
Yes
IC2701 (Pin 97)
N
o
Yes
IC2701 (Pin 94)
N
o
Yes
X
To Step 5
Is there
master clock input
to 1st DSP?
Is there
bit clock input
to 1st DSP?
Is there
LIR clock input
to 1st DSP?
Is there
data input
to 1st DSP?
Is there
master clock input
to 2nd DSP?
Step 3: Master Clock
Check the output of Pin 67 of
IC2201 (DSP uCOM) on the path.
X2701 (Pin 1)
24O
N
Master Clock
Is the logic
gate "H"?
N
o
Yes
S
Check the path.
Check the path.
IC2701 (Pin
8
0)
1st DSP EXTAL
N
o
Yes
V
X2701 (Pin 3)
T
IC2
8
01 (Pin 45)
2nd DSP EXTAL
N
o
Yes
W
To Step 4
Is oscillation of
24.576 MHz ?
N
o
Yes
Check the path.
Replace IC2709.
Replace X2701.
IC2709 (Pins 3,
8
)
BUFFER
N
o
Yes
U
Is there
master clock output
(24.576 MHz)?
Is there
master clock input
(24.576 MHz)?
Is there
master clock input
(24.576 MHz)?
AA
AB
