FUNAI LT8-M40BB - Troubleshooting Flowchart 15: No Digital Tuner Picture; Troubleshooting Flowchart 16: No Digital Tuner Audio; Troubleshooting Flowchart 17: No Audio Input

8-5 A03P0TR
Are the DIF signals outputted to Pin(16,18) of CN403?
No
Ye s
Check the line between Pin(16, 18) of CN403 and
Pin(4, 5) of TU1, and TU1(Tuner Unit), and service it
if defective.
Audio is not outputted normally. (Tuner input (Digital))
FLOW CHART NO.16
No
Are the audio(L/R) signals inputted to the Pin(1,44)
of IC803?
No
Ye s
Are the audio(L/R) signals outputted to Pin(8,10) of
CN403?
Ye s
Check the line between Pin(8,10) of CN403 and
Pin(1,44) of IC803, and service it if defective.
Are the audio(L/R) signals outputted to CN801 and
CN802?
No
Ye s
Check SP801,SP802 and their periphery circuit, and
service it if defective.
Check IC803 and the periphery circuit, and service it
if defective.
Replace Digital Main CBA Unit.
Audio is not outputted normally. (Audio input terminals)
FLOW CHART NO.17
Check the line between Pin(16, 18) of CN403 and
Pin(4, 5) of TU1, and TU1(Tuner Unit), and service it
if defective.
Are the DIF signals outputted to Pin(16, 18) of CN403?
No
FLOW CHART NO.15
Replace Digital Main CBA Unit or LCD Module
Assembly.
Are the audio(L/R) signals outputted to the specific
terminal?
Check the audio(L/R) signal line, and service it if
defective.
Check the component audio(L/R) signal line, and
service it if defective.
Check the PC audio(L/R) signal line, and service it if
defective.
Check the line between each pin of CN401 and input
terminal and service it if defective.
No
No
No
Ye s
Are the audio(L/R) signals outputted to Pin(21,22) of
CN401?
Are the component audio(L/R) signals outputted to
Pin(18,19) of CN401?
Are the PC audio(L/R) signals outputted to Pin(24,25)
of CN401?
Replace Digital Main CBA Unit.
Ye s
Picture does not appear normally. (Tuner input (Digital))