Daewoo DSC-30W60N Service Manual page 42

DTV Channel Trouble
When NO Signal Searching is not display
Select Input Select on the Setup Menu, and Check
Check Signal Strength.
Check tuner power to pins 6, 11, and 15 of U101.
Check IF signal to pin 19 of U101.
YES
Check TS stream signal to pins 122,
123, 124, 125 of IC100.
END
NO
Check AGC to pin 3 of U101.
NO
NO
Check B+, Clock and IIC Bus to
pins 94, 104, and 105 of IC100.
YES
Check Please Back-end A/V function.
41
Troubleshooting charts
YES
Change Tuner
U101.
NO
Change IC100