LGE Internal Use Only
3. TROUBLE SHOOTING
3.7 Power
Checking Power signal(Battery connector, PMU, Clock)
Power on voltage check list
Power domain
Configurable Voltage
Signal Name
Measurment Location
TP
VRTC
2.8 V
VRTC
C417
TP1
VPROC
0.75 ~ 1.3V (25mV/step)
VPROC_PMU
L401
TP2
VIO18
1.8 V
VIO18 _PMU
C416
TP3
VIO28
2.8 V
VIO28_PMU
C424
TP4
VM
1.2 V
DVDD12_EMI
C605
TP5
VCORE
1.15 V
VCORE__PMU
L403
TP6
VUSB
3.3V
VUSB33_PMU
C157
TP7
VTCXO
2.8V
VTCXO_0
C1304
TP8
VMC
3V
VMC_PMU
C153
TP9
VEMC_3V3
3 V
VEMC_3V3
C612
TP10
Check Output Voltage of U401 (PMU)
TP1
TP2
TP3
TP8
TP7
TP6
TP9
TP5
TP10
TP4
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ⓒ
2017 LG Electronics. Inc. All right rese
rved. Only training and service purposes
Oscillate frequency measurement
Signal name
Description
Frequency MHz
Measurment Location
Check Clock Result
X401 32.768 KHz crystal
32.74kHz
C419
X1201 26MHz Crystal(WCN)
26.03MHz
R1207
X1301 26MHz Crystal(Transceiver)
26.1MHz
C1309
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