LG KP175 - Page 47

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4. TROUBLE SHOOTING
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(2) Checking Mobile SW & FEM
TEST POINT
VBAT
56p
C503
20
GND9GSM_RX
7
4
TX_EN
VBATT
1
2
VLOGIC
VRAMP
3
U501
BS
5
19
DCS_RX
6
8
C508
10u
56p
C500
68p
C501
C510
0.01u
68
R503
56p
C502
PA_BAND
PA_EN
ANT_SW
TX_RAMP
WAVEFORM
CIRCUIT
Graph 4.2.2 ASM Control Signal
EGSM RX
V_LOGIC
Tx_EN
BS
C503
ASM+PAM
C502
C500