LG -A258 Service Manual page 70

CIRCUIT
ANT300 ANT301
C303
2.7n
C309 1p
C311
100pF
C319 DNI
C352
100pF
10n
C353
SW300
CONTROL LOGIC
LGE Internal Use Only
ANT302
C304
L302
DNI
8.2n
GND13
23
GND12
24
GND11
L306
25
ANT
1.2n
26
GND10
C330 27
L307
GND9
DNI 28
100n
PGND
29
VBAT
C334 C335
33p 2.2u
Figure 4.3.5 SIM1 Mobile SW & FEM circuit
Figure 4.3.6 TP4 ~ TP6 Control Logic
- 70 -
FL300
1 I1 9
O1-1
8
O1-2
7
O2-1
4 6
I2
O2-2
2 3 5 10
L303
6.8n
TP1
TP
1
C321
33p
RSVD2
14
TO PART_NO SKY77550 RSVD1
13
BS
12
U301
VSW_EN
11
L308 47p
Tx_HB_IN
10
L313 47p
Tx_LB_IN
9
L310
1.5n
C333
1.2p
C350 C336
3p 10u
Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C300 3.3n
RX34
L300
L301
DNI
DNI
C307 3.3n
RX34X
C308 15n
RX12
L304
L305
DNI
DNI
C310 15n
RX12X
TP
RF_TX_EN
TP3 R303 1K
TP
RF_TX_RAMP
TP
BS2
2
C320 3
C322
33p
39p
C323
DNI
RF_VLOGIC
TP4
L309 22
DCS_PCS_OUT TP
L314 1n
GSM_OUT
4
L315
DNI
C346
DNI
Only for training and service purposes