6-7
L0370TS
2. VIDEO SIGNAL SECTION
Are the video signals inputted to the specific
input terminal?
Are the luminance signals inputted to the
Pin(1) of IC781?
Check the line between Pin(1) of IC781 and JK721,
and service it if defective.
Check the line between Pin(13) of IC781 and JK721,
and service it if defective.
Check the line between Pin(5) of IC781 and JK722,
and service it if defective.
Check the line between Pin(3) of IC781 and TU1,
and service it if defective.
Check the line between each pin of IC781 and input
terminal and service it if defective.
Check IC781 and the periphery circuit,
and service it if defective.
No
No
No
No
Yes
No
No
No
Yes
Are the chrominance signals inputted to the
Pin(13) of IC781?
Are the component video signals inputted to the
Pin(5) of IC781?
Are the component video signals inputted to the
Pin(3) of IC781?
Replace LCD MAIN CBA UNIT or LCD MODULE.
Are the luminance signals outputted to the
Pin(15) of IC781?
Are the chrominance signals outputted to the
Pin(14) of IC781?
Are the component video signals inputted to the
Pin(4) of IC781?
Are the video signals outputted to the specific
output terminal?
Yes
Replace LCD MAIN CBA UNIT or LCD MODULE.
Yes
Are the luminance signals outputted to the
Pin(9) of CN103A?
Are the chrominance signals outputted to the
Pin(7 of CN103A?
Are the component video signals inputted to the
Pin(11) of CN103A?
Are the video signals outputted to the specific
output terminal?
Check the line between Pin(15) of IC781 and Pin(9)
of CN103A, and service it if defective.
Check the line between Pin(14) of IC781 and Pin(7)
of CN103A, and service it if defective.
Check the line between Pin(4) of IC781 and Pin(11)
of CN103A, and service it if defective.
Check the line between each pin of IC781 and CN103A
and service it if defective.
No
No
No
No
No
No
Check the line between JK726 and Pin(5)
of CN103A, and service it if defective.
Check the line between JK727 and Pin(3)
of CN103A, and service it if defective.
Check the line between JK728 and Pin(1)
of CN103A, and service it if defective.
Check the line between each input terminal and CN103A
and service it if defective.
Are the Y signals outputted to the Pin(5) of
CN103A?
Are the Pb signals outputted to the Pin(3) of
CN103A?
Are the Pr signals outputted to the Pin(1) of
CN103A?
Are the video signals outputted to the specific
input terminal?
Picture does not appear normally. (Tuner input / Video input/S-Video input.)
FLOW CHART NO.23
Picture does not appear normally. (Y / Pb / Pr input.)
FLOW CHART NO.24
