Pioneer VSX-52TX Service Manual - Page 126

there is a sound input., SurroundBack L/R data pin 4

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

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