LG LG-D855 - Unlock Pattern Creation and Management

3. TROUBLE SHOOTING
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3.7.3 LTE B1/B3/B7/B8/B20/B28A/B28B/B40 TX
3.7.3.1 Checking LTE PAM DC Power Circuit (B7/B28/B40)
Refer to 3.6.2.1
3.7.3.2 Checking LTE PAM DC Power Circuit (B7)
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TP2
TP1
U1500
U1601