LG GS290 Service Manual page 63

4. TROUBLE SHOOTING
GS290 Operational Description
FM_SPK_INN
FM_SPK_INP
USB_OEN
USB_DAT_VP
USB_SE0_VM
TXON_PA
SD_1V8 VAUDB_2V5 VBAT
VBAT
VAUDA_2V5 VFM_2V9
USB_DP
USB_DM
PMRSTN
VCXO_EN
BT_CLK_REQ
C207 C205 C200
1u 1u 1u
C204
0.1u
C234 C239 C209 C227 C226
C222
22u 2.2u 2.2u 0.1u 2.2u
10u
LDO Net name
SD1 CORE_1V35
SD2 SD_1V8
VAUX VFM_2V9
VIO VIO_2V62
VSIM VSIM_2V9
VMME VMME_2V9
VUMTS CAM_2V85
VUSB VUSB
VLED VLED
VAUDIOa VAUDA_2V5
VAUDIOb VAUDB_2V5
VRF1 VRF_2V85
VRF2 VRF_1V5
VRF3 VBT_2V65
VPLL VPLL_1V35
VRTC VRTC_2V11
VAFC VAFC
VVIB CAM_A_2V8
LG Electronics
LGE Internal Use Only
VUSB VBAT
FM_SPK_OUTP
FM_SPK_OUTN
VBAT
VPLL_1V35 VIO_2V62
C236 C238
VBAT
1u 2.2u
B1
RCV
C2
VPIN
D3
VMIN
C1
D+
D2
D-
E3
RESET_N
D1
RESET2_N
E2
SLEEP1_N
E1
SLEEP2_N
F2
U202
VAUDIOA
F1
VDDAUDIOA
PMB6821
G2
VDDAUDIOB
G1
VAUDIOB
H2
VAUX
H1
VDDAUX
J1
SU1_GATE
J2
SU1_GND
H3
SU1_FB
J3
SU1_ISENSE
K1
VDDSD2
K2
SD2_FB
L2
SD2_FBL
Output Voltage
1.35V
1.8V
2.9V
2.62V
2.9V
2.9V
2.85V
3.1V
2.9V
2.5V
2.5V
2.85V
1,53V
2.7V
1.35V
2.11V
2.65V
2.8V
PMIC
RTC_OUT
VBAT
VBAT VBAT
C241
1u
VMME
VDDMME
VDDRF2
VRF2
VRF3
VDDRF13_AFC
VRF1
VVIB
VDDSIMVIB
VSIM
VAFC
VRTC
VDDUMTS
VUMTS
VDDSD1
SD1_FB
SD1_FBL
Output Current
600mA
300mA
100mA
100mA
70mA
150mA
110mA
40mA
10mA
200mA
50mA
150mA
100mA
150mA
30mA
4mA
5mA
140mA
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Copyright © 2010 LG Electronics. Inc. All right reserved.
Revision B
R214
ON_OFF2
27K
RPWRON_EN
C214
0.1u
CORE_1V35 CAM_A_2V8 VSIM_2V9 VBT_2V65
L201 VBAT CAM_2V85 RTC_2V11 VRF_2V85
10u
C11
C10
D10
D11
E10
E11
F10
F11
G11
G10
H11
H10
H9
J11
FB201
K11
J10
L10
C208
C240 C223 C237 C219 C230 C229
2.2u 1u 1u 1u 1u 2.2u
10u
Usage
Core & for LDO
Memory
Touch, LCD
Peripherals
SIM card
u-SD
Camera
USB
Not used
Stereo headset, Mono earpiece
Analog parts of S-Gold
2.85 V supply for SMARTi-PM
RF transceiver
1.5 V supply for SMARTi-PM
RF transceiver
BT/FM Radio
S-GOLD3 PLL
Real Time Clock
Not used
Camera
LGE Property
Only for training and service purposes
SD_1V8
VRF_1V5 VMME_2V9
C228 C231 C202 C235
1u 2.2u 2.2u 1u