LG G5300 Service Manual page 57

4. TROUBLE SHOOTING
VC1
VC2
Graph 4-4. ANT SW Control
RX_EN
Graph 4-5. Dual Control Signal
ANT SW
EGSM TX
DCS TX
EGSM RX
DCS RX
Table 4-2. ANT SW control
GSM. DCS RX Mode
DCSSEL
GSMSEL
TXPA
for GSM RX Mode
GSMSEL DCSSEL TXPA
1 0
0 1
1 0
0 1
Logic
Low
Low
Low
High
Low
RX_EN
1
1
0
0
Graph 4-6. Dual Control Signal
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CN 401
KMS-502
AHT
FF
DCSSEL
GSMSEL
TXPA
for Des Rx Mode
High
Low
Low