Pioneer SX-LX70SW Service Manual page 29

5
QQ
3 7 63 1515 0
B
DAMP ASSY
IC3101 (Pin 15, etc.) MODULATOR
Is the voltage
3.3 V?
Yes
IC3191 (Pin 8)
Is the voltage
30.5 V?
Yes
IC3201-3501 (Pin 1, etc.) POWER STAGE VG
Is the voltage
12 V?
Yes
IC3201-3501 (Pin 21, etc.) POWER STAGE PVDD
TE
L 13942296513
Is the voltage
30.5 V?
Yes
To Step 3
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No
Check the parts and patterns
in the path.
P.CONFIG
No
Check the parts and patterns
in the path.
No
Check the parts and patterns
in the path.
No
Check the parts and patterns
in the path.
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Step 3: Operating Master Clock
IC101 B4 (R138)
Is there
an operating master
clock signal
(24.576 MHz)?
Yes
IC201 (Pin 45)
Is there
an operating master
clock signal
Q Q
(24.576 MHz)?
3 6 7 1 3 1 5
Yes
IC301 (Pin 30)
Is there
an operating master
clock signal
(24.576 MHz)?
Yes
To Step 4
co
.
SX-LX70SW
7
8
9 4 2 8
OSC1
Is there
No
an operating master No
clock signal(24.576 MHz)
at IC552-pin 4?
Yes
Check the parts and
patterns in the path.
Is there
No
an operating master
clock signal(24.576 MHz)
at IC551-pin 2?
Replace IC551
Yes
or X551.
Replace IC552.
OSC2
Is there
No
an operating master No
clock signal(24.576 MHz)
at IC551-pin 5?
0 5 8 2 9 9 4 2 8
Replace IC551.
Yes
Check the parts and
patterns in the path.
OSC3
Is there
No
an operating master No
clock signal(24.576 MHz)
at IC551-pin 7?
Replace IC551.
Yes
Check the parts and
patterns in the path.
m
9 9
A
B
C
9 9
D
E
F
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