LG -A100 Service Manual page 60

(2) Checking Mobile SW &FEM
TEST POINT
SW301
TP1
CIRCUIT
1 I1
942.5 MHz,35 MHz
4
TX module
U301
RSVD2
GND13 RSVD1
23
GND12
24
GND11 BS
25
ANT VSW_EN
26
GND10 Tx_HB_IN
27
GND9
28
PGND Tx_LB_IN
29
VBAT
GND
(10V,1608)
C321
C347 C322 C323 C329
4.7u 4.7u
3.9p 4.7p
DNI
LGE Internal Use Only
TP4N VLOGIC
RF_HB_RXP
C301 9p
L301
L313
3n
TP2
DNI
FL301
9
O1_1
TP2
RF_HB_RXN
8 C304 9p
O1_2
7
O2_1
RF_LB_RXP
L315 9p
6
I2 O2_2
L305
2 3 5 10
L314
15n
TP3
DNI
TP6
L316 9p
TP3
TP6
RF_TX_EN
C344
4.7p
R304
TP5
RF_TX_RAMP
TP5 100 TP7
C312 TP7
DNI
C345
4.7p
TP4
14 C346 TP4
13
4.7p
12
11
C302 22p
R315 75
RF_HB_TX
10
C318 33p
9
R316
DNI
C319
DNI
TP5 (V_Ramp)
TP7 (BS)
TP6 (TX
TP3
EN)
TP2
CONTROL LOGIC
EGSM Rx
RF_LB_RXN
TP4 VLOGIC
TP6 Tx_EN
RF_2G_BS
TP7 BS
RF_VLOGIC
RF_LB_TX
- 60 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Only for training and service purposes