Filter
Top Products
4. TROUBLE SHOOTING
- 87 -
4.7.1 Checking RF Tx level
4.7.2 Schematic of RF Tx level
TP1
TP2
TP3
Rev.D
Rev.D
Rev.C
R1011K
10nH
L116
R1001K
100p
C438
C124
100p
5.6p
C441
L108
15nH
1.5nH
L403
L115
18nH
100ohm
R107
C123
0.01u
C117
10p
56p
C101
68p
C139C137
NA
ANT
G1
G2
RF
SW100
KMS-507
C134
0.01u
GND3
9
GND4
10
GND5
GND6
12
GND7
13
GND8
14
GND9
16
21
P_GND
19
RSVD_GND
VAPC
20
17
VBATT
2
VCC1A
6
VCC1B
BS
1
DCS_PCS_IN
315
DCS_PCS_OUT
EGSM_IN
4
EGSM_OUT
11
ENABLE
18
GND1
5
GND2
7
8
SKY77318
U101
100nH
L102
C121
33u
C110
C138
33p
NA
21
14
GSM18001900_TX
GSM1800_RX1
1
GSM1800_RX2
2
GSM1900_RX1
3
4
GSM1900_RX2
GSM900_RX1
5
6
GSM900_RX2
16
GSM900_TX
VDD
19
WCDMA2100
9
ANT
11
CTRL1
18
CTRL2
22
7
GND1
GND10
23
GND2
8
GND3
10
GND4
12
GND5
13
15
GND6
17
GND7
GND8
20
GND9
U500
D5011
C102
NA
33p
C109
GSM_PA_RAMP
ANT_SEL1
ANT_SEL
0
TP1
TP2
TP3