Pioneer VSX-LX70 Service Manual page 56

1
DAC B
IC601(Pin 33)
A
No
Is there a
Y signal?
Yes
SY OUT
CN1002(Pin 16)
No
Is there a
Y signal?
B
Yes
Diagnose the INTERFACE Assy
or S-VIDEO Assy.
DAC C
IC601(Pin 29)
No
Is there a
C signal?
C
Yes
SC OUT
CN1002(Pin 14)
No
Is there a
C signal?
Yes
Diagnose the INTERFACE Assy
or S-VIDEO Assy
D
DAC D
IC601(Pin 28)
No
Is there a
Y signal?
Yes
Y OUT
CN1002(Pin 6)
E
No
Is there a
Y signal?
Yes
Diagnose the INTERFACE Assy
or COMPONENT & VOL Assy
F
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1
2
*Only 480i/576i input
L2
Check IC601.
No
Replace IC601.
A2
Check the parts and patterns in
the path(IC601 - CN1002).
No
Replace L641, Q641 or the
peripheries of L641 or Q641.
*Only 480i/576i input
L2
Check IC601.
No
Replace IC601.
A2
Check the parts and patterns in
the path(IC601 - CN1002).
No
Replace L651, Q651 or the
peripheries of L651 or Q651.
*Only 480i,576i input
L2
Check IC601.
No
Replace IC601.
A2
Check the parts and patterns in
the path(IC601 - CN1002).
No
Replace L661,Q661 or the
peripheries of L661 or
Q661.
2
3
IC601(Pin 25)
Is there a
Pb signal?
Yes
CN1002(Pin 4)
Is there a
Pb signal?
Yes
Diagnose the INTERFACE Assy
or COMPONENT & VOL Assy
IC601(Pin 24)
Is there a
Pr signal?
Yes
CN1002(Pin 2)
Is there a
Pr signal?
Yes
Diagnose the INTERFACE Assy
or COMPONENT & VOL Assy
VSX-LX70
3
4
DAC E *Only 480i,576i input
L2
No
Check IC601.
No
Replace IC601.
Pb OUT
A2
No
Check the parts and patterns in
the path(IC601 - CN1002).
No
Replace L671,Q671 or the
peripheries of L671 or Q671.
DAC F *Only 480i,576i input
L2
No
Check IC601.
No
Replace IC601.
Pr OUT
A2
No
Check the parts and patterns in
the path(IC601 - CN1002).
No
Replace L681,Q681 or the
peripheries of L681 or Q681.
4