LG D686 - Page 72

3. TROUBLE SHOOTING
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3.4.1.3 Checking RF signal path (PAM)
START
No
No
No
Replace U102
Yes
Yes
Yes
Check TP1(L104) at U102
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
Check TP2 at U102
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
Check TP3(R103),TP4(R104),TP5(R105),
at U102. Is any DC signal detected
at that points?
Check anything point
PAM circuits OK See next page.
The Problem may be Logic part
Refer to Logic troubleshoot