Pioneer VSX-03TXH Service Manual page 31

5
QQ
3 7 63 1515 0
A
Check that the data and clock signals are output.
IC101 (Pin 23)
Is there
a master clock
output?
(0 V ⇔ 3.3 V)
Yes
IC101 (Pin 24)
Is there
a LR clock
output?
Yes
IC101 (Pin 25)
Is there
a data
output?
Yes
TE
IC101 (Pin 26)
L 13942296513
Is there
a bit clock
output?
Yes
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5
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DIRM (Master clock)
Is the
voltage Pin 31
No
No
(PDN input signal)
of IC101 at
5 V?
Check the other assy.
(peripheral circuit of
the microcomputer)
Replace IC101.
DIRL (LR clock)
No
Replace IC101.
(0 V ⇔ 3.3 V)
DIRD (Data)
No
Replace IC101.
(0 V ⇔ 3.3 V)
DIRB (Bit clock)
No
Replace IC101.
(0 V ⇔ 3.3 V)
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6
8
Step 7-1-2: Switch
Check that the data and clock signals are output.
IC201 (Pin 4)
Is there
a data
output?
No IC201 (Pin 7)
Is there
a bit clock
output?
IC201 (Pin 12)
Is there
a LR clock
output?
IC201 (Pin 9)
Q Q
3 6 7 1 3
Is there
a master clock
output?
To Step 7-2
u163
.
VSX-03TXH
6
7
2 9 9 4 2 8
S1DT (Data)
No
(0 V ⇔ 3.3 V)
Yes
S1BC (Bit clock)
No
(0 V ⇔ 3.3 V)
Yes
S1LR (LR clock)
No
(0 V ⇔ 3.3 V)
Yes
S1MC (Master clock)
1 5 0 5 8 2 9 9 4
No
(0 V ⇔ 3.3 V)
Yes
Is the
voltage Pin 1
of IC201 at
0 V?
Check the path
Yes
between Pin 1 of IC201
and microcomputer.
Replace IC201.
m
co
7
8
9 9
A
B
C
2 8 9 9
No
D
E
F
31
8