Pioneer VSX-52TX Service Manual page 126

1
B
QQ
3 7 63 1515 0
IN4 (CD) (pin 42)
A
Is pin 42
inputting it?
Yes
Front IN (VIDEO2) (pin 7)
Is pin 7
inputting it?
Yes
B
MCKO1 (pin 23)
Is master
clock outputting
it?
PDN (pin 31)
Yes
signal 5V?
C
XTO (pin 29)
oscillation
TE
L 13942296513
D
LRCK (pin 24)
Is LR
clock outputting
it?
Yes
SDTO (pin 25)
Is data
outputting
E
it?
Yes
BCK (pin 26)
Is bit
clock outputting
it?
www
Yes
End
F
126
1
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2
No
Replace IC501
No
Check the FRONT-IN Assy
and related path.
No
Check the other Assy
No
Is input
(the periphery of
microcomputer)
Yes
X601 is oscillated only
at analog input.
Does
No
stop?
INT0 (pin 36)
Yes
Is output
signal 0V?
Yes
Replace IC601
No
Replace IC601
No
Replace IC601
No
Replace IC601
x ao
y
. i
2
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3
Step 7: X'tal
8
IC802
Is
pin 2 20MHz
outputting
it ?
End
Step 8: DSP output (digital)
• Digital output of each channel in the digital signal
(there is a sound) input.
IC801
SurroundBack L/R data (pin 4)
Is pin 4
outputting it?
Center/LFE data (pin 5)
Is pin 5
outputting it?
Q Q
3 6 7
Surround L/R data (pin 6)
No
Is pin 6
outputting it?
Front L/R data (pin 7)
Is pin 7
outputting it?
End
u163
VSX-52TX
3
4
2 9 9 4
No
Replace IC802 or X801
Yes
No
Replace IC801
Yes
No
Replace IC801
Yes
1 3 1 5 0 5 8 2 9
No
Replace IC801
Yes
No
Replace IC801
Yes
m
co
.
4
2 8
9 9
9 4 2 8 9 9