Checking Tx Signal Path - LG -H815 Service Manual

3.6.3 WCDMA PART
Checking Tx signal path (B1/B2/B5/B8 Tx)
Checking Flow
START
Check TP1/2/3/4
Signal is over 23dBm?
NO
Check TP5/6
Signal is over 3.5dBm
NO
Check Transceiver
physical damage
or soldering condition
OK?
Check next step
LGE Internal Use Only
Check component
above RF signal
YES
path
Check U1300
Soldering
YES
NOT GOOD
Replace U1500
TP4
TP3
TP2
TP1
24
3. TROUBLE SHOOTING
Image
U1300
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TP6
TP5