Pioneer VSX-84TXSi Service Manual page 262

1
Step 4-2
A
d
IC401 (pin 36) CLK, DATA
No
Is there a
clock?
Yes
e
IC454 (pin 4)
B
No
Is there a
clock?
Yes
d
IC401 (pins 7-10, 91-94)
No
Is there a
data?
Yes
C
f
IC452 (pins 11-18)
No
Is there a
data?
Yes
To Steps 4-3, 3-3
D
Step 4-3
Step 4-3-1
g
COMPOSITE OUT
IC701 (pin 35)
No
Is there a
signal?
E
Yes
B
CN1002 (pin 22)
No
Is there a
signal?
Yes
Check the INTERFACE Assy
and COMPOSITE V Assy.
F
216
1
2
Check the soldering of IC401.
If soldering has not been done
correctly, replace IC401.
Check the soldering of IC454.
If soldering has not been done
correctly, replace IC454.
Check the soldering of IC401.
If soldering has not been done
correctly, replace IC401.
Check the soldering of IC452.
If soldering has not been done
correctly, replace IC452.
Check the soldering of IC701.
If soldering has not been done
correctly, replace IC701.
Check the soldering of IC801.
If soldering has not been done
correctly, replace IC801.
2
3
Step 4-3-2
g
IC701 (pins 29, 33)
Is there a
signal?
Yes
B
CN1002 (pins 14, 16)
Is there a
signal?
Yes
Check the INTERFACE Assy
and S VIDEO Assy.
Step 4-3-3
g
IC701 (pins 24, 25, 28) COMPONENT OUT
Is there a
signal?
Yes
B
CN1002 (pins 2, 4, 6)
Is there a
signal?
Yes
Check the INTERFACE Assy
and COMPONENT & VOL Assy.
VSX-74TXVi
3
4
S-VIDEO OUT
Check the soldering of IC701.
No
If soldering has not been done
correctly, replace IC701.
Check the soldering of IC801.
No
If soldering has not been done
correctly, replace IC801.
Check the soldering of IC701.
No
If soldering has not been done
correctly, replace IC701.
Check the soldering of IC801.
No
If soldering has not been done
correctly, replace IC801.
4