Pioneer VSX-52TX Service Manual - Page 130

Step 5: 5, 3V conversion, Step 6: X'tal, Replace IC802 or X801

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1 2 C Pin 9 A Does it convert 3V into 5V for 11 pin input? No Replace IC952 Yes Pin 12 Does it convert 3V into 5V for No Replace IC952 B 8 pin input? Yes Pin 14 Does it convert 3V into 5V for 6 pin input? No Replace IC952 Yes C Pin 16 Does it convert 3V into 5V for 4 pin input? Yes Pin 18 No Replace IC952 Does it convert No D 3V into 5V for Replace IC952 2 pin input? Yes End E 3 4 Step 5: 5 → 3V conversion IC951 Pin 2 Does it convert 5V into 3V for 6 pin input? Yes Pin 5 No Replace IC951 Does it convert 5V into 3V for 3 pin input? Yes Pin 7 No Replace IC951 Does it convert 5V into 3V for 1 pin input? Yes End No Replace IC951 Step 6: X'tal IC802 Is pin 2 20MHz outputting it ? Yes End No Replace IC802 or X801 F 130 VSX-52TX 1 2 3 4

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VSX-52TX
130
1
2
3
4
1
2
3
4
C
D
F
A
B
E
Step 5: 5
→
3V conversion
Replace IC952
C
Pin 9
Does
it convert
3V into 5V for
11 pin input?
No
Yes
Replace IC952
Pin 12
Does
it convert
3V into 5V for
8 pin input?
No
Yes
Replace IC952
Pin 14
Does
it convert
3V into 5V for
6 pin input?
No
Yes
Replace IC952
Pin 16
Does
it convert
3V into 5V for
4 pin input?
No
Yes
Replace IC952
Pin 18
Does
it convert
3V into 5V for
2 pin input?
No
Yes
End
End
Replace IC951
IC951
Pin 2
Does
it convert
5V into 3V for
6 pin input?
No
Yes
Replace IC951
Pin 5
Does
it convert
5V into 3V for
3 pin input?
No
Yes
Replace IC951
Pin 7
Does
it convert
5V into 3V for
1 pin input?
No
Yes
IC802
End
Is
pin 2 20MHz
outputting
it ?
Replace IC802 or X801
No
Yes
Step 6: X'tal