FUNAI LED22-T800M Service Manual page 25

FLOW CHART NO.16
Picture does not appear normally. (Video input/Y/Pb/Pr input/RGB input)
Are the video signals outputted to the specific
terminal?
Are the component video(Y/Pb/Pr) signals outputted
to Pin(4, 6, 8) of CN906?
Are the RGB video signals outputted to Pin(26, 28, 29)
of CN906?
Are the composite video signals outputted to
Pin(2,22) of CN906?
Yes
Replace Digital Main CBA Unit or LCD Module
Assembly.
FLOW CHART NO.17
Picture does not appear normally.
Are the DIF signals outputted to Pin(16, 18) of CN905?
Yes
Replace Digital Main CBA Unit or LCD Module
Assembly.
FLOW CHART NO.18
Audio is not outputted normally. (Tuner input (Digital))
Are the DIF signals outputted to Pin(16,18) of CN905?
Yes (Output to headphone)
Are the audio(L/R) signals outputted to Pin(8,10) of
CN905?
Are the audio(L/R) signals inputted to the Pin(19, 32)
of IC801?
Are the audio(L/R) signals outputted to CN503 and
CN801?
Check CL503, CL801 and their periphery circuit, and
service it if defective.
Are the audio(L/R) signals outputted to Pin(3, 4) of
CN907?
Check JK206 and their periphery circuit, and service it
if defective.
Yes (Output to speakers)
Yes
Yes
Yes
Yes
Check the line between each pin of CN906 and input
terminal and service it if defective.
No
Check the component video(Y/Pb/Pr) signal line,
and service it if defective.
No
Check the RGB video signal line, and service it if
defective.
No
Check the composite video signal line, and service it
if defective.
No
Check the line between Pin(16, 18) of CN905 and
Pin(9, 10) of TU10, and TU10(Tuner Unit), and service
it if defective.
No
Check the line between Pin(16, 18) of CN905 and
Pin(9, 10) of TU10, and TU10(Tuner Unit), and service
it if defective.
No
Replace Digital Main CBA Unit.
No
Check the line between Pin(8,10) of CN905 and
Pin(19, 32) of IC801, and service it if defective.
No
Check IC801 and the periphery circuit, and service it
if defective.
No
Replace Digital Main CBA Unit.
8-5 A0C76TR