LG -A290 Service Manual page 72

CN201
U203
MINI_ABB For AGR Without Audio
VUSB_LDO_4V9
VIO
R226
47K
USB_DM
USB_DP
UART_RX
UART_TX
HOOK_DET
VIO
TP4
MUIC_INT
LGE Internal Use Only
VUSB_CHG_IN (TP3)
VBAT(TP2)
VUSB_LDO_4V9 (TP1)
VIO(TP4)
No CCDS
VBAT
TP2
TP1
C244 C245
1u
1u
3
VIN
25
VBAT1
26
VBAT2
27
EXPDET
R247 0 11
USB1DM
12
R248 0
USB1DP
13
USB2DM
14
USB2DP
15
AUDL
16
AUDR
R250
17
MIC
32
470
DSS
VUSB_LDO_4V9
R232
47K
DSS : High--> Default UART
I2C_SDA1
I2C_SCL1
Figure 4.5.1
VHP_MIC_2V0
VCAMD
TORCH_3V3 VIB_3V3
C240 C241 C242
1u 1u 1u
VUSB_CHG_IN
23
VBUS1
24
VBUS2
22
D-
21
U203
D+
20 FB209
ID
19
R2_2K
18
CLDO
C252
10n
Figure 4.5.2
- 7 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C243
1u
TP3
C250
1u
MUIC_IO_M
MUIC_IO_P
120
MUIC_ACC_ID
R227
2.2K
Only for training and service purposes