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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.2.1 Checking GSM PAM block
HIGH
GSM850
MODE
ON
GSM_PA_BAND
GSM900
GSM
HIGH
DCS/PCS
GSM_PA_EN
MODE
LOW
GSM_SAW_SW_MODE
OFF
HIGH
PA STATE
LOW
LOW
1000p
C1062
4.7u
C1059
3.9nH
L1011
+VPWR
2.2K
R1016
1p
L1009
100p
C1061
GND1
2
3
GND2
GND3
4
6
GND4
GND5
8
1
RFIN
RFOUT
5
7
VC
LMSM32AA-533 FL1001
R1014
100ohm
VBATT
4
VRAMP
5
TQM7M5012
U1001
BAND_SELECT
2
DCS_PCS_IN
1
11
DCS_PCS_OUT
GND1
7
GND2
12
8
GSM_IN
9
GSM_OUT
6
NC1
NC2
10
TX_EN
3
56p
L1010
39p
C1069
L1008
6.8nH
15p
C1060
GSM_PA_BAND
GSM_PA_RAMP
GSM_SAW_SW_MODE
TX_DCS_PCS
TX_GSM
GSM_PA_EN
[Fig.] the schematic of PAM Block
[Fig.] Test Point of GSM PAM Blcok
TP1
TP2
TP3
Test Point
Net Name
Description
TP1
+VPWR
PAM Power Supply
TP2
GSM_PA_EN
PAM Enable
TP3
GSM_PA_RAMP
PAM Gain Control.
TP1
TP2
TP3
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