LG KE590 Service Manual page 43

4. TROUBLE SHOOTING
4.1.2 Part Description
4.1.2.1 Regulator
Supply 2.8 Voltage to RF part
REGEN
LGE Internal Use Only
U406
U405
VBAT
LDO Supplies
TPS79928DRVR
C433
6
0.1u
IN
5
NC
4
EN
PGND
U405
TPS79928DRVR
6
IN
5
NC
4
EN
PGND
U406
<Fig.1> Regulator Circuit Diagram
- 44 -
VCC_SYN
U405
1
OUT
2
NR
3
GND
7
C434 C435
0.01u 2.2u
C_VCCRF
U406
1
OUT
2
NR
3
GND
7
C436 C437
0.01u 2.2u
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