LG -D100F Service Manual page 63

3. TROUBLE SHOOTING
3.4.1.3 Checking RF signal path (PAM)
START
No
Check TP1 at U1100
Check anything point
Check if there is any major difference referring
To Figure 3.2.1.4 Is it similar ?
Yes
Yes
Check TP2 at U1100
Check if there is any major difference referring
PAM circuits OK See next page.
To Figure 3.2.1.4 Is it similar ?
No
Replace U1100
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