LG GW520 - Page 99

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. Trouble shooting
GW520 service manual
<CHECKING FLOW CHART>
1.8V 32K clock
BLUETOOTH + FM
11
8
UART_RTS
UART_RXD
9
UART_TXD
10
VAFL
16
VAFR
15
VBATT
36
VDDIO
13
VDDR3V
37
VDDRF
35
VDDTF
28 34
VREG_CTL
XTAL_N
18
XTAL_P
19
GPIO0 GPIO1
17 22
GPIO5
27
GPIO6
I2C_CLK
29
I2C_DATA
26
I2S_SCK
24 25
I2S_SDO I2S_WS
23
30
LPO_IN
PCM_CLK
3
PCM_IN
2
38
PCM_OUT
4
PCM_SYNC
33
RST_N
TM0
14
UART_CTS
BT_ANT
6
FM_ANT
32
GND1
1
42
GND10
5
GND2
GND3
7
GND4
12
20
GND5
31
GND6
GND7
39
40
GND8
GND9
41
21
U403
RBCA-B561A
SMZY0019501
100K
R448
100pC431
DNI
R438
2V62_VIO
2.2u
C421
TP402
0.5p
TP404
TP401
C430
1.5nH
0
C429
R441
R447
DNI
47K
100p
C435
C434
DNI
C433
DNI
C432
1R449
R446 0
FEED
NC1
NC2
TP405
ANT400
ACS2450HBACU5
SNGF0016101
R440
0
DNI
R443
TP403
NA
L400
VBAT
TP406
2V85_VBT 2V62_VIO
BT_INT
DBB_BT_INT
UART_BT_RX
UART_BT_TX
UART_BT_CTS
UART_BT_RTS
BT_PCM_SYNC
BT_PCM_RX
BT_PCM_TX
BT_PCM_CLK
BT_VCXO_EN
FM_ANT
BT_CLK
CLK32K_1V8
RADIO_OUT_R
RADIO_OUT_L
CLK32K_1V8CLK32K
BT_RESET_N