Pioneer VSX-52TX Service Manual - Page 127

Step 9: Codec output analog, there is no sound input.

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5 6 • Each channel output in the digital signal (-∞ dB (there is no sound) ) input. IC801 SurroundBack L/R data (pin 4) Is the output 0V fixing? No Replace IC801 Yes Center/LFE data (pin 5) Is the output 0V fixing? No Replace IC801 Yes Surround L/R data (pin 6) Is the output 0V fixing? Yes No Replace IC801 Front L/R data (pin 7) Is the output 0V fixing? Yes End No Replace IC801 7 8 Step 9: Codec output (analog) • Analog output of each channel in the digital signal (there is a sound) input. A IC701 SurroundBack L out (pin 21) Is pin 21 outputting it? No Replace IC701 Yes SurroundBack R out (pin 22) Is pin 22 outputting it? No Replace IC701 B Yes Center out (pin 23) Is pin 23 outputting it? No Replace IC701 Yes LFE out (pin 24) C Is pin 24 outputting it? No Replace IC701 Yes Surround L out (pin 25) Is pin 25 outputting it? No Replace IC701 Yes Surround R out (pin 26) D Is pin 26 outputting it? No Replace IC701 Yes Front L out (pin 27) Is pin 27 outputting it? No Replace IC701 E Yes Front R out (pin 28) Is pin 28 outputting it? Yes End No Replace IC701 F VSX-52TX 127 5 6 7 8

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VSX-52TX
127
5
6
7
8
5
6
7
8
C
D
F
A
B
E
Replace IC801
Is the output
0V fixing?
Is the output
0V fixing?
Is the output
0V fixing?
Is the output
0V fixing?
SurroundBack L/R data (pin 4)
No
Yes
Replace IC801
Center/LFE data (pin 5)
No
Yes
Replace IC801
Surround L/R data (pin 6)
No
Yes
Replace IC801
Front L/R data (pin 7)
No
Yes
End
End
IC801
• Each channel output in the digital signal (–
∞
dB
(there is no sound) ) input.
Step 9: Codec output (analog)
• Analog output of each channel in the digital signal
(there is a sound) input.
Replace IC701
Is pin 21
outputting it?
SurroundBack L out (pin 21)
No
Yes
Replace IC701
Is pin 22
outputting it?
SurroundBack R out (pin 22)
No
Yes
Replace IC701
Is pin 23
outputting it?
Center out (pin 23)
No
Yes
Replace IC701
Is pin 24
outputting it?
LFE out (pin 24)
Surround L out (pin 25)
No
Yes
Replace IC701
Is pin 25
outputting it?
No
Yes
Replace IC701
Is pin 26
outputting it?
Surround R out (pin 26)
No
Yes
Replace IC701
Is pin 27
outputting it?
Front L out (pin 27)
No
Yes
Replace IC701
Is pin 28
outputting it?
Front R out (pin 28)
No
Yes
IC701