Pioneer VSX-03TXH Service Manual page 34

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A
Step 8: DSP output (digital)
Digital output of each CH when inputting the digital
signal with audio.
IC401 (Pin 123) Center/LFE data
No
Is there
a data output?
(0 V ⇔ 3.3 V)
Yes
Surround L/R data
IC401 (Pin 124)
B
Is there No
a data output?
(0 V ⇔ 3.3 V)
Yes
IC401 (Pin 125) Front L/R data
No
Is there
a data output?
(0 V ⇔ 3.3 V)
Yes
C
IC401 (Pin 122) Surround Back L/R data
No
Is there
TE
a data output?
L 13942296513
(0 V ⇔ 3.3 V)
Yes
D
Replace IC401.
Digital output of each CH when inputting the digital
signal (-∞ dB (no audio)).
IC401 (Pin 123) Center/LFE data
E
No
Is the output
Replace IC401.
0 V fixing?
Yes
IC401 (Pin 124) Surround L/R data
www
No
Is the output
Replace IC401.
0 V fixing?
Yes
F
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2
Is the
voltage of
No
DS0RST at 3.3 V?
(Does it drop to 0V
periodically?)
There is a possibility
of the Boot error.
Yes
(Identification of the
defective part near
DSP is extremely
difficult.)
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2
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3
8
IC401 (Pin 125)
Is the output
0 V fixing?
Yes
IC401 (Pin 122)
Is the output
0 V fixing?
Yes
Check that the clock signal is output.
IC501 (Pin 3)
Is there
a master clock
output?
(0 V ⇔ 3.3 V)
Yes
IC501 (Pin 6)
Q Q
3 6 7
Is there
a bit clock
output?
(0 V ⇔ 3.3 V)
Yes
IC501 (Pin 11)
Is there
a LR clock
output?
(0 V ⇔ 3.3 V)
Yes
To Step 9
u163
VSX-03TXH
3
4
2 9 9 4
Front L/R data
No
Replace IC401.
Surround Back L/R data
No
Replace IC401.
DAMC (Master clock)
No
Replace IC501.
DABC (Bit clock)
1 3 1 5 0 5 8 2 9
No
Replace IC501.
DALR (LR clock)
No
Replace IC501.
m
co
.
4
2 8
9 9
9 4 2 8 9 9