Magnavox NB500MG9 Service Manual page 22

FLOW CHART NO.17
Picture does not appear normally.
Set the disc on the disc tray, and playback.
Are the video signals outputted to each pin of
CN2000?
CN2000 9PIN VIDEO
CN2000 1PIN VIDEO-Y(I/P)
CN2000 3PIN VIDEO-Pb/Cb
CN2000 5PIN VIDEO-Pr/Cr
Are the video signals shown above inputted into
each pin of IC2300 or IC2301?
IC2301 3PIN VIDEO
IC2300 1PIN VIDEO-Y(I/P)
IC2300 3PIN VIDEO-Pb/Cb
IC2300 5PIN VIDEO-Pr/Cr
Are the video signals outputted to each pin
of IC2300 or IC2301?
IC2300 20PIN VIDEO-Y(I/P)
IC2300 17PIN VIDEO-Pb/Cb
IC2300 15PIN VIDEO-Pr/Cr
IC2301 6PIN VIDEO-CVBS
Are the video signals outputted to the specific
output terminal?
Are the component video signals outputted to the
VIDEO OUT terminal (JK2300)?
Are the composite video signals outputted to
the VIDEO OUT terminal (JK2300)?
No
Yes
No
Yes
No
Yes
No
No
Replace the BE Main CBA Unit or FE Main CBA &
BD Mechanism Assembly.
Check the line between each pin of CN2000 and
each pin of IC2300 or IC2301 on the ,and service
it if detective.
9PIN → IC2301
CN2000
1PIN → IC2300
CN2000
3PIN → IC2300
CN2000
5PIN → IC2300
CN2000
Is 5V voltage supplied to the Pin(4,18) of IC2300
and Pin(4) of IC2301?
Yes
Replace IC2300
or IC2301.
Check the periphery of JK2300 from Pin(15,17,20)
of IC2300 and service it if detective.
Check the periphery of JK2300 from Pin(6) of
IC2301 and service it if detective.
1-8-5
3PIN VIDEO
1PIN VIDEO-Y(I/P)
3PIN VIDEO-Pb/Cb
5PIN VIDEO-Pr/Cr
No
Check P-ON+5V(2) line and
service it if detective.
E5E20TR