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7. AUDIO TROUBLESHOOTING
(1) NO ATSC AUDIO
1) CHECK IC400 AND SURROUNDINGS
Is FPGA Part OK?
YES
1.8V & 3.3V are supplied to IC400?
YES
Data is input from TU300 to IC400(A11,
E19, A20)?
YES
Data is output from R424? Fig.01
YES
3.072MHz clock is output from FB401?
Fig.02
YES
48kHz clock is output from R421?
Fig.03
NO
Go to FPGA Troubleshooting Flow(1)
NO
NO
NO
NO
NO
3-29
Check the Power Supply Part.
Check Tuner Part.
Check the surroundings of IC401.
Check the surroundings of IC401.
Check the surroundings of IC401.
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