LG KE770 Service Manual page 90

5.12.3 Regulator Circuit
Circuit Diagram
PMIC & Li-ion CHARGER
R201
RTC_OUT
220K
R205
470K
VBAT 1V8_MEM
FB203
PWRON
VUSB_PU
VBUS_USB
C223
22u
C222 C223
GND DIV GND DIV
Test Points
R202
PWRON VBACKUP
4.7K
VBAT
SPOWER_INT
_PMRST
3V1_USB
C205
100u
1V5_RF
1
VCHS
2
VBATS
3
VRFC
4
ON
5
VDDPW
L201
6
SW
10uH
7
VSSPW
8
VSSFB
9
FB
10
VUPU
11
VUSB
12
VBUS
C224 C225 C226 C227
22u 2.2u 2.2u 2.2u
Figure 4-8
VCHG 2V11_RTC 1V5_CORE
C206
2.2u
36
VCXOEN
35
VDDA
34
VANA
33
VSSR
R211
32
U203
IREF
31
BYP
C215
30
PMB6812
VDDAU
29
AUOP
28
AUON
27
VSSAU
26
AUIP
25
AUIN
R214
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5. Trouble shooting
1V5_DSP 2V85_RF VBAT 2V7_VCXO 2V65_BT
C207 C208 C209 C210 C211
2.2u 2.2u 2.2u 2.2u 2.2u
2V65_ANA VBAT
VCXO_EN
82K
C216
2.2u
0.1uF
2V72_IO
2 2K
C226
C209
C211
C212
2.2u
C217
2.2u