Samsung SGH-P520 Service Manual page 70

BT_EN
C142
C136
BT_ANT
L111
3
UNBAL
G G G
R111
4
V _ B A T T
R108
VBT_1.8V
R106
C137 C138
C139
C140
C144
PCM_CLK
PCM_OUT
PCM_IN
PCM_SYNC
5
L109
BAL
BAL 7
6 8 1 2
F103
L110
C147
V B T
U103
1 STBY 5
NC
2
GND
3 4
VIN VOUT
GND
6
BH18FB1WHFV
U102
A4 C4
VDD_ANA UART_CTS
C6 A7
VDD_CORE UART_RTS
B2 D4
VDD_LO UART_RX
D6 C5
VDD_PADS UART_TX
G4
VDD_PIO
C2 G5
VDD_RADIO SPI_CLK
G6
A5
VDD_USB SPI_CSB
F7
SPI_MISO
F3 F6
PIO[0] SPI_MOSI
F4
PIO[1]
G1 A6
PIO[2] USB_DN
G2 B5
PIO[3] USB_DP
E6
PIO[4]
F5 A3
PIO[5] XTAL_IN
D7 B3
PIO[6] XTAL_OUT
E5
PIO[7]
E3 D2
PIO[8] AUX_DAC
F1 E7
PIO[9] RESETB
F2 A2
PIO[10] VREG_IN
G7
TEST_EN
D3
AIO[0]
C3 B4
AIO[2] VSS_ANA
C7
VSS_DIG
B6 B1
PCM_CLK VSS_LO
B7 G3
PCM_IN VSS_PADS
E4 C1
PCM_OUT VSS_RADIO
D5
PCM_SYNC
1
NC
E2 2
RF_A NC
E1
RF_B
VBT_1.8V
10-35
Flow Chart of Troubleshooting
_ 1 8 . V
C143
VBT_1.8V
BT_TXD
BT_RXD
C141
R107
OSC101
C145