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4. TROUBLE SHOOTING
4.7 BT Trouble
TEST POINT
CIRCUIT DIAGRAM
VBAT
R344
BT_EN
330
C312
4.7u
2V8_VBT
U304
TC7SH08FS
5
1
VCC
USC3
3
PCM_TX
GND
2
BT_EN
DUBUG_RX
DUBUG_TX
2V8_VBT
U303
VIN
VOUT
3
4
GND
BGND
2
6
STBY
NC
1
5
BH28FB1WHFV
C637
C313
C314
15p
0.1u
2.2u
C315
0.1u
2V8_VMEM
4
PCM_SYNC8
U305
MAX4717EBC-T
C2
C4
PCM_EN
IN1
NO1
A2
A4
IN2
NO2
USC_301
C3
C1
USC_1
COM1
NC1
USC_302
A3
A1
USC_2
COM2
NC2
R354
10K
_BT_RST
BLUETOOTH
M301
LBMA-2C67B
16
_BT_RST
RESETB
C316
VDD_VREGIN
1
NA
PIO0
2
PIO1
7
PIO2
8
C319
PIO3
9
0.1u
PIO4
10
PIO5
28
PCM_RX
NC
UART_RTS
UART_CTS
PCM_TX
13
SPI_CLK
14
USC1
SPI_CSB
12
SPI_MOSI
PCM_SYNC
15
USC2
SPI_MISO
- 80 -
ANT301
R345
FEEDING
0
NC
R346
R347
BT_ANT
NA
NA
2V8_VBT
22
VDD_1_8V
21
VDD_DIG
3
1608
1608
C317
C638
C318
4
GND1
2.2u
15p
2.2u
6
GND2
11
GND3
25
GND4
27
R348
47
UART_TX
DEBUG_RX
24
R349 47
UART_RX
DEBUG_TX
23
26
19
R350
47
PCM_IN
PCM_TX
17
R351
47
PCM_OUT
PCM_RX
R352
18
47
PCM_SYNC8
R353 47
20
PCM_CLK
USC0
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