Pioneer VSX-1020-K Service Manual page 28

1
QQ
3 7 63 1515 0
A
Step 6: DSP output (digital)
Digital output of each CH when inputting the digital
signal with audio.
IC301 (Pin 123) (or R348)
No
Is there
a data output?
(0 V ⇔ 3.3 V)
27
Yes
IC301 (Pin 124) (or R348)
B
No
Is there
a data output?
(0 V ⇔ 3.3 V)
27
Yes
IC301 (Pin 125) (or R348)
No
Is there
a data output?
(0 V ⇔ 3.3 V)
27
Yes
C
IC301 (Pin 122) (or R348)
No
Is there
TE
L 13942296513
a data output?
(0 V ⇔ 3.3 V)
27
Yes
XDSP1RST at 3.3 V?
D
Digital output of each CH when inputting the digital signal
(-∞ dB (no audio)).
IC301 (Pin 123) (or R348)
E
No
Is the output
0 V fixing?
27
Yes
IC301 (Pin 124) (or R348)
www
No
Is the output
0 V fixing?
27
F
Yes
28
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2
Center/LFE data
Surround L/R data
Front L/R data
Surround Back L/R data
Is the
voltage of
No
(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.)
Replace IC301.
Center/LFE data
Replace IC301.
Surround L/R data
x ao
y
Replace IC301.
. i
2
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8
IC301 (Pin 125) (or R348)
Is the output
0 V fixing?
27
Yes
IC301 (Pin 122) (or R348)
Is the output
0 V fixing?
27
Yes
DAC Buffer
Check that the clock signal is output.
IC452 (Pin 16) (or R459)
Is there
a master clock
output?
28
Yes
Q Q
3 6 7
IC452 (Pin 13) (or R458)
Is there
a bit clock
output?
29
Yes
IC452 (Pin 11) (or R458)
Is there
a LR clock
output?
29
Yes
To Step 7
u163
VSX-1020-K
3
4
2 9 9 4
Front L/R data
No
Replace IC301.
Surround Back L/R data
No
Replace IC301.
DA2MCLK (Master clock)
No
Replace IC452.
(0 V ⇔ 3.3 V)
1 3 1 5 0 5 8 2 9
DA2BCK (Bit clock)
No
Replace IC452.
(0 V ⇔ 3.3 V)
DA2LRCK (LR clock)
No
Replace IC452.
(0 V ⇔ 3.3 V)
m
co
.
4
2 8
9 9
9 4 2 8 9 9