Checking Gsm Pam Block - LG -P698 Service Manual

4.4 Checking GSM PAM Block

4.4 Checking GSM PAM Block
L1107
1.5n
C1150
C1149
DNI
DNI
C1152
5.6p
L1109 C1153
12n DNI
IF GSM is not working, check the VBAT level.
LGE Internal Use Only
Schematic of the Antenna Switch Block
TP
2mm
VBAT
0603
1608
L1152
C1133
C1132
22n
8.2p
10u
U1101
16 1
DCS_PCS_OUT DCS_PCS_IN
15 2
GND6 BS
14 3
GND5 TX_EN
13 4
VCC_OUT VBATT
12 5
GND4 VAPC
11 6
GND3 NC
10 7
GND2 GND1
9 8
GSM_OUT GSM_IN
28 17
PGND12 PGND1
27 18
PGND11 PGND2
26 19
PGND10 PGND3
25 20
PGND9 PGND4
24 21
PGND8 PGND5
23 22
PGND7 PGND6
TP
(VBAT)
GSM_PA_BAND
GSM_PA_EN
R1111
GSM_TX
51
8dB
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4. TROUBLE SHOOTING
R1107
DCS_PCS_TX
30
5dB
0603
R1110 2.2K
GSM_PA_RAMP
C1154
39p
0603
Only for training and service purposes