LG D686 Service Manual page 33

3.1.1.4 Checking RF signal path (FEM)
Check if there is any major difference referring
To Figure 3.1.1(b) Is any signal detected at that
All WCDMA_B1/B2/B5/B8 Rx check is complete.
If the phone sill do not work ,replace main board
LGE Internal Use Only
START
Check TP1 at DPX
point?
Yes
Is any signal detected at
that point?
Yes
No
Check anything point
No
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3. TROUBLE SHOOTING
Replace FL103
Only for training and service purposes