Samsung SGH-U900 Service Manual page 72

C119 C120 C121
RADIO_ANT
ANT100
R112
2 OUT
L112
VBT_1.5V
C116
L111
BT_TCXO
F104
C124
4
IN
GND GND
3 1
VMSMB_2.6V VBT_2.6V
C128 C127
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BCM2048SKUFBG
A5
VREGFM_DAC
D5
BT_PWDN
VREG_CTL
B5
VREG_BT
TP100
D6
BT_RST
RST_N
R109
H2
RES
B4
LPOIN
RTC_CLK L110
A3
FMVCO_LP
C117 A2
FMVCO_LN
D4
C118
FMPLLCAP
A1
FM_CVAR
C1
FMRF_INN
D1
FMRF_INP
F1
RFIOP
G1
RFION
C122 K3
XTALN
K2
XTALP
C123
K5
RADIO_L
AUDIOR
C125
K6
RADIO_R
AUDIOL
1000nF J5
AUDIOGND
K8
VDDO18
A8
VDDO18
F9
VDDO18
E2
VDDRF
E1
VDDRF
A6
VDDR5V
B6
VDDR3V
J1
VBT_1.5V
VDDLO
K1
VDDPLL
J3
VDDXO
E10
VDDOC1
J8
VDDOC1
C129 A9
VDDOC1
G5
VBT_1.5V
VDDC
D9
VDDC
G7
VDDC
L113 A7
VDDC
J10
VDDC
B1
VDDFM
B3
VDDFM
J4
VDDFM
K4
VDDFM
A4
VDDFM
C130
10-30
Flow Chart of Troubleshooting
U100
H10
BT_WAKE
GPIO0
H9
BT_HOST_WAKE
GPIO1
F10
GPIO2
G9
GPIO3
E6
GPIO4
G6
GPIO5
B8
GPIO6
D10
GPIO7
C131
B9
BT_PCM_CLK
A_GPIO0
C10
BT_PCM_SYNC
A_GPIO1
B10
BT_PCM_IN
A_GPIO2
A10
BT_PCM_OUT
A_GPIO3
E9
A_GPIO4
K9
A_GPIO5
B7
A_GPIO6
E7
A_GPIO7
R110
K10
UART_TXD
J9
UART_RXD
F7
BT_CTS
UART_CTS_N R111
C9
BT_RTS
UART_RTS_N
VMSMB_2.6V
K7
TM0
J7
TM1
F6
TM2
J6
TM3
B2
VSS
C2
VSS
D2
VSS
D7
VSS
E4
VSS
E5
VSS
F2
VSS
F4
VSS
F5
VSS
G2
VSS
G4
VSS
G10
VSS
H1
VSS
J2
VSS
1
NC
2
NC
BT_TCXO_EN
RXD
TXD