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3
8
G
11
1
E
4
F
10
6
D
B
A
D
10
7
11
E
5
B
H
7
12
F
G
1
9
2
9
5
4
H
A
6
3
12
C
2
8
C605
L606
R603
C609
L605
VEXT_5V
TP601
ZD604
C611
L600
NOA
NOB
3
NOC
7
11
NOD
2
SAB
SCD 10
VCC
14
4
COMB
COMC
8
COMD 12
6
GND
1
NCA
5
NCB
9
NCC
13
NCD
15
6
7
S2
U600
COMA
16
4
5
5
NC 8
9
NC
NC 10
11
NC
NC 12
13
NC
S1
IFC600
1
1
2 2
3
3
4
D603
VEXT_5V
L603
C618
VAP_SYS_3.0V
ZD605
VCAM_28IO
R618
VAP_SYS_3.0V
R617
L601
R605
R604
VMOT_3.0V
VEXT_FET_5V
R613
R614
C614
VMOT_3.0V
C617
1
3
2
V_BAT
VCAM_18D
Q600
NC
NC 5
USB_ID
3
6
VBUS
C603
U608
DM
1
2 DP
GND
7
4
C616
C626
C625
V_BAT
2
7
GND
VIN
1
6
VOUT1
5
VOUT2
V_BAT
U604
EN1 4
3 EN2
GND
TP600
D604
MODE
9
NC
NC
10 11
NC
PWM
2
VDD 6
5
VDN
VDP 8
U605
1 EN
GAIN
4
7
GND
3
C615
GND
2 VIN VOUT1 5
VOUT2
6
VSS
4
VCAM_28AF
U606
3
EN1
EN2
1
7
C623
VTF_3.0V
VMOT_3.0V
C604
C610
R607
R616
R602
C622
V_BAT
C606
V_BAT
L602
COMP
2
CTRL 5
1
FB
GND
3
7
GND
4
SW
VIN 6
E3
BOOT
E4
JIG
E5
GND
U607
C5
DP_CON
D1
VBAT
D2
ID_BYPASS
D3
V_AUDIO_R
D4
VIDEO
D5
ID_CON
E1
RXD
E2
TXD
B2
I2C_SDA
B3
AUDIO_L
B4
MIC
B5
DM_CON
C1
DM_HOST
C2
I2C_SCL
C3
V_AUDIO_L
C4
AUDIO_R
NC
1
NC
2
A1
INTB
A2
VDDI
O
A3
CHG_DET
A4
VBUS_OUT
A5
VBUS_IN
B1
DP_HOST
U601
R615
C620
C621
8
VOUT1
6
VOUT2
VEXT_SAFE_5V
V_BAT
L604
CE1
1
3
CE2
GND
2
GND
9
NC
4
5
NC
7
VDD
U603
C601
VUSB_OVP_5V
C607
C624
D600
VCAM_28A
D602
V_BAT
EAR_MIC_P
C613
AP_TXD
CP_RXD
USB_DM
EARSPK_R
EARSPK_L
AP_FLM_TXD
AP_FLM_RXD
SIM_RST
SIM_IO
CP_RXD_SIMRST
CP_BOOT_SEL
UART_SEL
UART_RX
UART_TX
AP_RXD
CP_TXD
T_FLASH_EN
JTAG_ID
JTAG_IF_CON_SENSE
JIG_ON
CP_TXD_SIMIO
CHG_SEL
BOOT
UART_TX
JTAG_RXD
JTAG_TXD
UART_RX
VIB_EN_OUT
USB_DP
USB_ID
CAM_EN
LCD_PWM_OUT
CATHODE
ANODE_18V
CP_USB_D-
USB_DP
C
USB_ID
FM_ANT
CAM_EN
MOT_P
MOT_N
VIB_EN_OUT
VIB_PWM
INTB
A
AP_SDA_3.0V
USB_DM
AP_USB_D-
AP_SCL_3.0V
GT-B7300 Service schematic diagram
P O W E R
R C V
S P E A K E R
M I C
S I M
M O T O R
F M R A D I O