LG KF350 Service Manual page 115

7. CIRCUIT DIAGRAM
1 2 3
PMIC VUSB
VBAT
A
C203
2.2u
USB_OEn
USB_DAT_VP
USB_SE0_VM
TXON_PA
1V8_SD 2V5_VAUDB VBAT
B
VBAT
2V5_VAUDA 2V9_VFM
B1
U_RCV RCV
C2
U_PMIN VPIN
D3
U_VMIN VMIN
C1
USB_DP D+
D2
USB_DM D-
PMRSTn
E3
PMRSTn RESET_N
D1
RESET2_N
E2
VCXO_EN SLEEP1_N
E1
BT_VCXO_EN SLEEP2_N
F2
VAUDIOA
F1
VDDAUDIOA
G2
VDDAUDIOB
G1
C
VAUDIOB
H2
VAUX
H1
VDDAUX
C223 C224 C225
J1
2.2u 2.2u 1u SU1_GATE
J2
SU1_GND
H3
SU1_FB
J3
SU1_ISENSE
K1
VDDSD2
K2
SD2_FB
L2
SD2_FBL
C233
C234 C235 0.1u 10u C236 C237 C238
22u 2.2u C231 2.2u 0.1u 2.2u
D
Remote Power On
2V11_RTC
E
R214
Q201
RPWRON_EN
2SC5663
3.3M
R216
3.3M
C249
2.2u
F END_KEY_IN
EXTERNAL RESET
G
2V62_VIO 2V11_RTC
7 8
EXTRSTn A1 VCC
6 1
SPOWER_INT B1 Y1 PM_INT
5 2
_RESET Y2 B2 PMRSTn
4 GND A2 3
C255
U203 0.1u
NC7WZ08L8X
H
1 2 3
LGE Internal Use Only
4 5 6
R201
RTC_OUT ON_OFF2
KDR331V
27K
VBAT
R202
DNI 2V62_VIO 2
3
C202
1
2.2u
D201
1V35_VPLL
C201
VBAT
0.1u
VBAT 2V62_VIO VBAT
VBAT
C205
1u
TP201
10uH
L201
C11
VMME
C10
VDDMME
D10
VDDRF2
D11
VRF2
E10
VRF3
E11
VDDRF13_AFC
F10
VRF1
F11
VVIB
U202
G11
VDDSIMVIB
PMB6821
G10
VSIM
H11
VAFC
H10
VRTC
H9
VDDUMTS
J11
VUMTS
K11
VDDSD1
J10
SD1_FB
L10
SD1_FBL
10u
C232
R213
100K
PWRON
END_KEY
ICVN0505X150FR
Q203
2SC5663
2V62_VIO 2V62_VIO
_EOC
CHG_EN
R222
100K
_PPR
4 5 6
7 8
OVP_VCHG
OVP_VUSB
AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR
1V35_CORE 2V8_CAM_A 2V85_VRF 1V5_VRF 2V9_VMME
VBAT 2V85_CAM 2V11_RTC 2V9_SIM 2V65_VBT 1V8_SD
AUDIO_IN
BB_SND_R
BB_SND_L
FM_SND_R
FM_SND_L
FB202
C239 C240 C241 C242 C243 C244 C245 C246 C247 C248
2.2u 1u 1u 1u 2.2u 2.2u 2.2u 2.2u 2.2u 2.2u
END KEY
END_KEY_IN
KEY_ROW0
3
R215
2 Q202
KTC4075E
10K
1
(1%)
KEY_COL2
VA201
Charging IC
VUSB_USB
VCHG VBAT
U204 ISL9221
13
PGND
1
VDC
12
VDC_BYP OVP_VCHG
2
VUSB
11
BAT
3
_PPR
10
USB_BYP OVP_VUSB
4
_CHG
9
IVDC
5
_EN
8
GND
6
IMIN
7
IUSB
R225 R224 C256
C257 R223
1u 10K
(1%) 18K 16K
1u
(1%) (1%)
7 8
- 116 -
9 10 11
VBAT
VBAT
C212 2.2u
C213 1u C214 2.2u
C216
A4
1000p C1N
C215 1u
A5 A1
HSO_R
C1P HPR
A2
HSO_L
HPL
C217 1u D1
INA2
C218 1u
D2
INA1
U201
C219 1u C1
INB2 MAX9877AEWP_TG45
C220 1u C2 D5
INB1 OUT+ SPK_RCV_P
B2 B5
C222 BIAS OUT- SPK_RCV_N
1u
B3
SDA SDA
C3
SCL SCL
C221 1u
D4
R210 20K
RXIN+
B4
RXIN- C226 C227
27p 27p
R211 8.2
EAR_P
R212 8.2
EAR_N
Battery Connector & Current Monitor
VBAT
CN201
BAT_ID
1 R218 1K
G1
100p
2
C250
G2
3
C252 C253 C254 C251
10p 27p 47p 2.2u
9 10 11
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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