Table of Contents
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7. CIRCUIT DIAGRAM
+5V_PWR
ICHARGE
CHG_CNT_N
1u
C415
ICHARGEOUT
0.1u
C427
BATT_FET_N
1005
RESET_IN_N
C412
1u
USB_OE_N
D401
USB_CNT_N
USB_VBUS
RB521S-30
4.7u
C450
VBAT_TEMP
KYBD_BACKLIGHT
PM_ON_SW_N
MOTOR_PWR-
USIM_P_DATA
VREG_PA
R403
PA_FET_N
0
Q400
SI8402DB
SI8407DB-T2-E1
VREG_PA
VREG_W_PA
+VPWR
C419
33u
1
ADC_BYP
REF_BYP
2
VCHG
REF_GND
3
ISNS_P
REF_ISET
4
CHG_CTL_N
5
ISNS_M
MSM_INT_N
6
VBATT
VBAT
TCXO_IN
7
BAT_FET_N
PS_HOLD
8
FLSH_DRV_N
VREG_MSMA
9
U402
PON_RESET_N
TCXO_EN
10
VREG_USB
VDD_ANA
11
USB_ID
PM6650
TCXO_OUT
12
VREG_5V
VDD_MSM
13
USB_OE_N
14
VSW_5V
VREG_MSMP
15
USB_CTL_N
16
USB_VBUS
VBACKUP
17
USB_DAT
USB_DAT
18
USB_D+
USB_D_P
XTAL_OUT
19
USB_SE0
USB_SE0
SLEEP_CLK
20
USB_D-
USB_D_M
XTAL_IN
21
GP1_DRV_N(MPP7)
RUIM_RST(MPP6)
R408
47K
C413
1u
R460
+VPWR
smd_2520h1_6_r
10K
4.7uH
L400
C432
2.2u
C411
C404
4.7u
1000p
1608
Q401
+VPWR
C400
10u
100K
R402
R400
PA_FET_N
1K
C403
0.1u
U411
BH28FB1WHFV
1
5
LCD_LDO_EN
STBY
NC
2
6
GND
BGND
3
4
0
R412
+VPWR
VIN
VOUT
VREG_LCD_2.8V
VREG_MSMP_2.7V
C431
63
0.1u
62
1u
C437
61
R414
121K
60
R416
470K
V_BACK_UP
VCOIN
TP400
59
PM_INT_N
58
RB521S-30
TCXO_PM
57
56
D400
55
0
R415
TCXO_EN
54
4.7u
C434
+VPWR
53
51
R413
smd_1608h_9_r
BUFF_TCXO
52
+VPWR
51
SBST
PM_SBST
50
49
SBCK
PM_SBCK
48
47
SBDT
PM_SBDT
3
46
4
TP401
45
X400
SLEEP_CLK
44
1
2
43
USIM_P_RST_N
MC-146_12.5pF
C435
C438
32.768KHz
27p
27p
+VPWR
USIM_RST_N
USIM_P_CLK
USIM_CLK
USIM_DATA
VREG_USIM_2.85V
VREG_MMC_3.0V
C401
C409
2.2u
1000p
R401
100K
VCC
C402
5
2
4
TCXO_BT_IN
1000p
3
U400
GND
TC7S04FU
U401
6
1
USB_D-
USB_D+
5
2
4
3
USB_VBUS
RCLAMP0504F
- 150 -
USB_VBUS
6
5
4
C1
C2
3
B
1
2
USB_CNT_N
+5V_PWR
JTAG_PS_HOLD
6
5
4
PS_HOLD
VREG_MSMA_2.6V
C1
C2
3 B
1
2
CHG_CNT_N
VREG_MSMP_2.7V
ICHARGE
ICHARGEOUT
+VPWR
VBATT
BATT_FET_N
VREG_BT_2.85V
TCXO_BT
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Troubleshooting
