Pioneer VSX-03TXH Service Manual page 38

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QQ
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A
Step 7-1: XM/DT
Check that the data and clock signals are output.
XMFD (Data)
IC103 (Pin 37)
Is there
No
Replace IC103.
a data
output?
(0 V ⇔ 3.3 V)
Yes
XMBK (Bit clock)
IC103 (Pin 39)
B
Is there
No
Replace IC103.
a bit clock
output?
(0 V ⇔ 3.3 V)
Yes
XMLR (LR clock)
IC103 (Pin 41)
Is there
No
Replace IC103.
a LR clock
output?
(0 V ⇔ 3.3 V)
Yes
C
IC103 (Pin 43) XMMK (Master clock)
Is there
No
Replace IC103.
a master clock
TE
output?
L 13942296513
(0 V ⇔ 3.3 V)
Yes
To Step 7-2
D
E
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Step 7-2: Switch
Check that the data and clock signals are output.
IC201 (Pin 4)
Is there
a data
output?
(0 V ⇔ 3.3 V)
Yes
IC201 (Pin 7)
Is there
a bit clock
output?
(0 V ⇔ 3.3 V)
Yes
IC201 (Pin 12)
Is there
a LR clock
output?
(0 V ⇔ 3.3 V)
Yes
IC201 (Pin 9)
Is there
a master clock
Q Q
3 6 7
output?
(0 V ⇔ 3.3 V)
Yes
To Step 7-3
u163
VSX-03TXH
3
4
2 9 9 4
S1DT (Data)
No
S1BC (Bit clock)
No
S1LR (LR clock)
No
S1MC (Master clock)
No
1 3 1 5 0 5 8 2 9
Is the
No
voltage Pin 1 of
IC201 at
5 V?
Check the path
Yes
between Pin 1 of IC201
and microcomputer.
Replace IC201.
m
co
.
4
2 8
9 9
9 4 2 8 9 9