LG LG-X230DS - Checking Power Signal(Battery Connector, PMU, Clock)

LGE Internal Use Only
3. TROUBLE SHOOTING
Checking Power signal(Battery connector, PMU, Clock)
3.7 Power
Image
Checking Flow
PMU
(U401)
26M(X1301)
START
Battery voltage
higher than 3.5V?
Change or charging
the Battery
Check TP
YES
YES
NO
NO
NO
Re-solder or change
X401，X1301，U101
Check Clock
Re-solder or change
U401
YES
Device can power on
NO
32K(X401)
BATTERY CONNECTOR (J501)
CPU(U101)
Copyright ⓒ 2017 LG Electronics. Inc. All right rese
rved. Only training and service purposes
45