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4. TROUBLESHOOTING
4.7 BT Trouble
TEST POINT
CIRCUIT DIAGRAM
BLUETOOTH
( 903015 )
M101
16
_BT_RST
RESETB
C103
1
PIO0
NA
2
PIO1
7
PIO2
8
PIO3
9
PIO4
10
PIO5
28
NC
SPI101
13
SPI_CLK
SPI102
14
SPI_CSB
SPI103
12
SPI_MOSI
SPI104
15
SPI_MISO
VBAT
U102
VIN
VOUT
3
4
GND
BGND
2
6
BT_EN
STBY
NC
1
5
BH28FB1WHFV
C109
1u
BT_EN
(BT ANT -> TRANSFER TO FETCH ANT)
R101
3.3nH
C101
C102
NA
NA
2V8_VBT
LBMA-2C67B2
22
VDD_1_8V
CLOSED TO BT MODULE
21
L101
22nH
VDD_DIG
3
VDD_VREGIN
C104
4
C105
C106
GND1
1u
6
GND2
15p
1u
11
GND3
25
GND4
27
UART_TX
DEBUG_RX
24
UART_RX
DEBUG_TX
23
UART_RTS
26
UART_CTS
19
PCM_IN
PCM_TX
17
PCM_OUT
PCM_RX
18
PCM_SYNC
20
PCM_CLK
USC0
2V8_VBT
R110
R104
100K
47K
4
U101
TC7SH08FS
2V8_VBT
C107
C108
1u
15p
_BT_RST
ANT1
GND1
PCM_RX
PCM_TX
USC1
USC2
5
1
VCC
USC3
3
PCM_TX
GND
2
- 78 -
2V8_VMEM
C334
0.1u
U306
MAX4717EBC-T
C4
C2
PCM_EN
NO1
IN1
A4
A2
NO2
IN2
USC_300
C1
C3
USC_1
NC1
COM1
USC_301
A1
A3
USC_2
NC2
COM2
R314
10K
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