LG -A290 Service Manual page 123

BT & FM
LGE Internal Use Only
RF Part
GND400 ANT400
RF_TX_RAMP
PA_EN
C405
100p
SW400
C411
2
ANT COMMON
1
100p
G3 G4
C413
3 4
L411
DNI 27n
CON ANT FEED
TP400
C428 100p
C432 C430 C431
DNI DNI 1.5p
VLOGIC
C400
DNI
RF_ANT_SW1
C402
DNI
GND8
15
R407
10K
VRAMP GND6
16 8
GND5
7
TxEN GND4
17 6
GND3
U400
C407 5
R409 RSVD
C406
18
VBATT2
24K 220p
4
DNI Rx1 VBATT1
19 3
RSVD3 GND2
20 2
GND1
1
Rx2
21
GND7
22
(10V,2125) (50V,C,NPO)
C412 L400
2.4n
100p
C415
C416
0.5p
DNI
C417
B9512
FL400
1 IN 9
O1_1
C418
8 C419
O1_2
7
O2_1
L402
9.1n GND O2_2
4 6
2 3 5 10
C420
C421
B9513
FL401
1 IN 9
O1_1
8 C422
O1_2
7
O2_1
C423
L405 G1 O2_2
4 6
4.3n
2 3 5 10
C424 6.8p
R410
SFCY0000901
47
GND2 GND1
C436
OUT IN
FL402
18p
C437
C438
DNI
DNI
C6
AVDD28_FM
C426 1u B7
AUROUT LDO28EN
FM_AUDIO_R
C425 1u C7
FM_AUDIO_L AULOUT
B5
AVSS28_FM2 AVDD28_SX
U401
F2
TP401 VDD28 AVSS28_RF1
BT_HOST_WAKEUP D7
GPIO0 VCC28OUT_FM
TP402 E7
BT_CLK_REQUEST SRCLKENA
D4
TESTMODE AVSS28_RF3
TP403 E5
EXT32K AVSS28_RF2
BT_32K
F7
BT_UART_RX UTXD1
TP404 C427 C429
1u 1u
- 123 -
R402 C401 33p
HB_TX
51
C403 33p
LB_TX
VBAT
C410 C408 C409
1u
10u
56p
(50V,C,NP0)
18p
GSM850_RxP
L401
22n
18p
GSM850_RxN
18p
EGSM_RxP
L403
22n
18p
EGSM_RxN
5.6p
DCS_RxN
L404
4.7n
5.6p
DCS_RxP
PCS_RxN
6.8p
L406
5.6n
PCS_RxP
VBAT
R415
C433
1u
R413 100K
E1
VBAT
E2
BT_POWER_EN
D1 C434 1n
OSC_IN
BT_CLK_26M
C1
B2
D2 C435 1u
C3
T1P
B3
C2
B1
REXT
R412
15K
Copyright © 2012 LG Electronics. Inc. All right reserved.
7. CIRCUIT DIAGRAM
Only for training and service purposes