LG GS290 Service Manual page 47

3. TECHNICAL BRIEF
GS290 Operational Description
FM_ANT
ANT302 ANT301
C302
1.5p
GS290_C-CLIP
FEED
1
ANT303
Figure 18. Bluetooth / FM Radio Circuit Diagram
LGE Internal Use Only
VBAT
C379
2.2u
L319
100n
L318 C376
27p
100n
E1
FM_RX
E2
VSS_FM_AUDIO
F1
FM_TX_P
FL300
G1
FM_TX_N
LFB212G45SG8A166
R302
C382 15p B1
BT_RF
IN OUT
0
GND1 GND2
C1
VSS_BT_RADIO_BAL
R304 R309
C366 330p
1
2
270n 100n
C384
D300 2
VA308
22p
EVLC18S02015
EDTY0008606
1
C375 C308
C312
2.2u
2.2u
0.1u
C309 C377 C304
2.2u 470n 2.2u
PCM2_OUT
PCM2_SYNC
PCM2_CLK
PCM1_IN_SPI_MOSI
PCM1_OUT_SPI_MISO
PCM1_SYNC_SPI_CS
PCM1_CLK_SPI_CLK
U301
UART_RTS
UART_CTS
BC7820
AUDIO_OUT_L
AUDIO_OUT_R
PIO_2_CLK_REQ_OUT
SPI_PCM_SEL
PIO_3_CLK_REQ_IN
C305 100p
R343 470
VBT_2V65
U305
BGB707L7ESD
1 6
VCC C_A
C371 47n
2 5
L313
BIAS_OUT ON_OFF
270n
3 4
RF_IN RF_OUT
C368
R342
680
330p
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Copyright © 2010 LG Electronics. Inc. All right reserved.
Revision B
VBT_2V65
C378
0.1u
D4
PCM2_IN
B5
I2S2_SDO
B6
I2S2_WS
C5
I2S2_CLK
F5
BT_PCM_OUT
G6
BT_PCM_IN
G5
BT_PCM_SYNC
F4
BT_PCM_CLK
TP308
D6
UART_TX
BT_UART_RX
D5
BT_UART_CTS
E6
BT_UART_RTS
C6 TP311
UART_RX
BT_UART_TX
C301 1u
D3
FM_AUDIO_L
C303 1u
D2
FM_AUDIO_R
TP312
E3
BT_CLK_REQ
100K
E4
R301
F3
C3
PIO_4
BT_HOST_WAKEUP
R305
100K
CLK26M
CLK32K
C370
47n
TP313
FM_LNA_CTRL
330p
C369
FM_ANT
Only for training and service purposes