VSX-LX50
60
1
2
3
4
1
2
3
4
C
D
F
A
B
E
Yes
DACC
Check the parts and patterns in
the path (IC701 to R751, Q751).
If IC701 or R751 or R752 or Q751
is failure, replace it.
IC701 (Pin 29)
Is there a
C signal?
No
j-3
Yes
SC OUT
Check the parts and patterns in
the path (Q751 to CN1002).
If Q751 or R753 is failure,
replace Q751 or R753.
CN1002 (Pin 11)
Is there a
C signal?
No
a
Diagnose the MAIN CONTROL
Assy or S-VIDEO Assy.
Yes
DACF
Check the parts and patterns in
the path (IC701 to R781, Q781).
If IC701 or R781 or R782 or Q781
is failure, replace it.
IC701 (Pin 24)
Is there a
Pr signal?
No
j-
6
Yes
Pr OUT
Check the parts and patterns in
the path (Q781 to CN1002).
If Q781 or R783 is failure,
replace Q781 or R783.
CN1002 (Pin 23)
Is there a
Pr signal?
No
a
Diagnose the MAIN CONTROL
Assy or COMPONENT Assy.
Yes
DACD
Check the parts and patterns in
the path (IC701 to R761, Q761).
If IC701 or R761 or R762 or Q761
is failure, replace it.
IC701 (Pin 28)
Is there a
C signal?
Is there a
Y signal?
No
j-4
Yes
Y OUT
Check the parts and patterns in
the path (Q761 to CN1002).
If Q761 or R763 is failure,
replace Q761 or R763.
CN1002 (Pin 19)
No
a
Diagnose the MAIN CONTROL
Assy or COMPONENT Assy.
Yes
DACE
Check the parts and patterns in
the path (IC701 to R771, Q771).
If IC701 or R771 or R772 or Q771
is failure, replace it.
IC701 (Pin 25)
Is there a
Pb signal?
Is there a
Pb signal?
No
j-5
Yes
Pb OUT
Check the parts and patterns in
the path (Q771 to CN1002).
If Q771 or R773 is failure,
replace Q771 or R773.
CN1002 (Pin 21)
No
a
Diagnose the MAIN CONTROL
Assy or COMPONENT Assy.
G
Yes
DACA
Check the parts and patterns in
the path (IC701 to R731, Q731).
If IC701 or R731 or R732 or Q731
is failure, replace it.
IC701 (Pin 35)
Is there a
composite
signal?
No
j-1
Yes
CVBS OUT
Check the parts and patterns in
the path (Q731 to CN1002).
If Q731 or R733 is failure,
replace Q731 or R733.
CN1002 (Pin 3)
Is there a
composite
signal?
No
a
Step 3-
6
: Video
O
utput
(
480i
/
57
6
i only
)
Diagnose the MAIN CONTROL
Assy or COMPOSITE Assy.
Yes
DACB
Check the parts and patterns in
the path (IC701 to R741, Q741).
If IC701 or R741 or R742 or Q741
is failure, replace it.
IC701 (Pin 33)
Is there a
Y signal?
Is there a
Y signal?
No
j-2
Yes
SY OUT
Check the parts and patterns in
the path (Q741 to CN1002).
If Q741 or R743 is failure,
replace Q741 or R743.
CN1002 (Pin 9)
No
a
Diagnose the MAIN CONTROL
Assy or S-VIDEO Assy.