LG TracFone LG840G Service Manual page 53

4.3.3 Checking GSM Rx part
Re-download & Calibration
LGE Internal Use Only
START
Check TP1~3
Signal exist?
Yes
Rx Still has problem?
Yes
TP2
TP3
No
Check FEM &
Soldering of TPs
No
GSM/DCS/PCS Rx is OK.
TP1
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4. TROUBLE SHOOTING
Only for training and service purposes