LG G5300 Service Manual page 74

• Test) U301 (ADP3408) Check!!
POWER-ON KEY
signal input
VCHARGE
C333 10uF
(2012)
R347
VBAT
0.33
D302
Q301
CUS02
S G
5 4
D4 D3
6 3
D5 D2
7 2
D6 D1
8 1
TPCF8102
Pin 25 (2V7_VTCXO)
Pin 22 (2V8_VMEM)
Pin 2 (POWERKEY)
Pin 1 (RYWRON)
VBAT
2
POWERKEY PWRONKEY
4
SIM_EN SIMEN
10
CHRIN
14
ISENSE
12
GATEDR
C334
7
U301
1000p BATSNS
ADP3408
17
RESCAP
C335
0.1u
GATEIN
EOC
CHG_EN
CHRDET
CLKON
RPWRON
This signal should go HIGH when the power-on
R348
200K
procedure is completed.
Pin 21 (2V45_VTCRE)
Pin 6 (2V45_VRTC)
C329
C330
0.1u 10uF
(2012)
3
ROWX KEYROW0
8 2V85_VSIM
MVBAT MVBAT
18
RESET
19
VSIM
21
VMEM
22
VCORE
24
VAN
25
VTCXO
6
VRTC
26
REFOUT
(2012)
C348 C349
NC 0.1u
- 73 -
4. TROUBLE SHOOTING
R340
100
_RESET
C331 C332
100p 100p
These powers should be
necessary to power on.
2V8_VMEM
2V45_VCORE
2V45_VAN
2V7_VTCXO
2V45_VRTC
C341 C342 C343 C344 C345 C346
4.7u
0.22u 2.2u 2.2u 0.1u 0.22u
(2012) (2012) (2012) (2012)
C347
0.1u