LG GX300 Service Manual page 80

CIRCUIT
TP1
TP1
TP2
TP2
CONTROL LOGIC
Low Band Tx
BS2
BS1
Tx_EN
VLOGIC
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Only for training and service purposes
SIM 1
TP4
TP8 TP4
TP5
TP5
TP6
TP6
TP8
TP7
TP7
Figure 4.4.8 SIM1 Mobile SW & TX Module circuit
Figure 4.4.9 SIM 1 TP4 ~ TP8 scope waveform
4. TROUBLE SHOOTING
TP3
TP
1842.5MHz,75MHz
881.5MHz,25MHz
Tx_EN
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4. TROUBLE SHOOTING
Tx_Ramp
LGE Internal Use Only