Table of Contents
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PHONE_ON
C223
1
R223
C225
2
OSC201
VBAT
TA201
C234
VR201
+VDD_RX_TX
C235
+VCC_SYN
C249
C237
+AVDD
C239
+AVDD_HFA
C244
+VDD_IO_HIGH
C245
+VDD_IO_LOW
C247
U102
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C222
C224
TP214
25
26
27
28
29
30
31
32
33
34
35
24
RF2VDD
23
RF12VBAT
22
RF1VDD
21
D1VDD
20
LPD1VBAT
19
U204
LPVDD
18
HCVBAT
17
HCVDD
16
D2VDD
15
IOD2VBAT
14
IOVDD
13
_REC2
12
11
10
9
8
7
6
5
4
3
PMU_RSTON
IT_PMU
SIMIO
+VCC_SYN
R104
C119
CLKFDBX
REFVCC
CLKOUT
PGMDIV
VDDL
GNDL
EN
7-7
Flow Chart of Troubleshooting
DC/DC Down Conveter(1.875Volt)
VBAT
U203
1 VIN
2
GND
C228
3 EN
+VDD_IO_LOW
VDD_SLEEP
C236
36
37
SCP
38
SCN
39
D3VDD
R235
40
+VDD_IO_LOW
SIMD3VBAT
41
SIMVCC
42
SIMIOCD
43
SIMCKCD
44
_SIMRSCD
45
SIMEN
46
GPO3
C240
C241
C242
C243
47
GPO2
48
GPO1
49
GND
GND 50
51
GND
GND 52
53
NC
NC 54
2
1
REC1n
SCL
SDA
32KHz_DIGIT
PON_TX
REF_ON
SIMRST
SIMCLK
C112
TCX101
C115
3
OUT
C152
4
VCC
R107
C123
C127
L202
5
SW
+VDD_GSM_CORE
4
FB
C229
C248
SIM_VCC
SIM_IO
SIM_CLK
SIM_RST
PON_3587_SYNTH
2
GND
C116
R105
R106
R108
AFC
D_REF_CLK
+VDD_IO_LOW
RF_EN
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