LG TracFone LG840G Service Manual page 57

L102
15n
L104
DNI
TP1
SW102
VREG_MSMP_2.6V
TP2
L131 1.2n
TX_HB
L135 L132
DNI DNI
C161 4.7p
TX_LB
L133
L134
12n DNI
TP3
Table.1
V ramp MIN
V ramp(TP4)
V ramp Input Current
Operating Case Temperature
Supply Voltage, V (TP5)
BATT
LGE Internal Use Only
C158
100p
C103
4.7p
C157
100p
GND
C107 C108
1u 33p
R101
ANT_SEL[2]
R102
ANT_SEL[1]
R103
ANT_SEL[0]
C109
1n
U101
17
PGND
16 1
HB_RFOUT HB_RFIN
15 2
GND6 BAND_SEL
14 3
GND5 TXEN
13 4
GND7 VBATT
12 5
GND4 VRAMP
11 6
GND3 NC
10 7
GND2 GND1
9 8
LB_RFOUT LB_RFIN
C120
EAN62188401
100p
RF3194
V ramp = 0.2V, 1.6V
C105 33p
L107
100n
12
ANT
13
L108
GND4
14
VDD
15
15n
VC3
16
VC2
17
VC1
1K
1K
1K
TP5
+VPWR
C110
C111
12p 22u
C115
GSM_PA_BAND
100p
C166
GSM_PA_EN
DNI
R107
GSM_PA_RAMP
2.2K
C117
33p
TP4
C121
100p
C104
C122
100p 100p
R109 R110
DNI DNI
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4. TROUBLE SHOOTING
WCDMA_1900
WCDMA_850
FL101
5
GSM850RX1
4
GSM900RX2
3
GSM900RX1
2
GSM1800/1900RX2
1
GSM1800/1900RX1
LMSP33QJ-C65TEMP
EAT61533501
About 2dB
C116
R104
GSM_HB_TX
12
100p
R106
R105 430 430
C123 L111
8.2n
3.9p
L112
L113
C125
8.2n
5.6n 8.2p
0 0.25
0 1.6
10
-25 +90
3.0 3.5 4.8
Only for training and service purposes
C124
GSM_LB_TX
100p
V
V
µA
℃
V
dc