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Flow Chart of Troubleshooting
7-2
SIM_VCC
VDD_IO_HIGH
2.9V
not use
DCDC- 1.875V
AVDD_HFA
1.9V
VCC_RX_TX
VDD_IMAGE
VDD_IO_LOW
VCC_SYN
VDD_GSM_CORE
VDD_4V
2.7V
MIC_BIAS
SIM_CLK
2.7V
2.6V
VDD_VIB_2.9
AVDD
SIM_IO
VDD_SLEEP
2.9V
3.3V LDO
VDD_VIB
2.1V
SIM_RST
2.6V
2.9V
BT_NOT_USE
not use
2.9V
C411
C414
C417
C422
3
4
5
6
G
7
8
G
G
9
10
G
SIM400
1
2
C423
R402
R405
C416
V400
R404
BAT400
C426
T400
C415
C418
27
_ONKEY
1
_REC1
13
_REC2
11
_RSTHC
44
_SIMRSCD
7
_SIMRSHC
SIMIOCD
9
SIMIOHC
41
SIMVCC
31
VBAT
32
VCHG
29
VINT
30
VSAVE
10
_IRQ
2
SCL
38
SCN
37
SCP
3
SDA
43
SIMCKCD
8
SIMCKHC
40
SIMD3VBAT
45
SIMEN
42
OSCI
25
OSCO
6
PWREN1
5
PWREN2
28
REFC
23
RF12VBAT
RF1VDD
22
24
RF2VDD
17
HCVDD
15
IOD2VBAT
IOVDD
14
LPD1VBAT
20
19
LPVDD
12
MICBIAS
53
NC
NC
54
26
49
GND
GND
50
51
GND
GND
52
48
GPO1
47
GPO2
46
GPO3
HCVBAT
18
CHGCUR/BATMAX
33
CHGDRV
4
CLK32K
36
CPVBAT
35
CPVDD
21
D1VDD
D2VDD
16
39
D3VDD
U400
34
OSC400
R407
C420
C424
C421
R403
+VDD_IO_LOW_2.9V
R408
C407
C410
C406
C419
R406
C408
C413
C409
U704
C425
C412
BACKLIGHT
+VCC_SYN_2.8V
+VDD_SLEEP_2.9V
+AVDD_HFA_2.6V
+AVDD_2.6V
+VDD_IMAGE_2.9V
VBAT
BU_RST
IT_PMU
ONKEYN
AUX_ON
RSTON
SIMRST
32KHz_DIGIT
REF_ON
PON_TX
SCL
SDA
SIMCLK
SIMIO
+VDD_RX_TX_2.8V
+VDD_IO_HIGH_2.9V
+VDD_IO_LOW_1.9V
MIC_BIAS