- 66 -
LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
ʹΠΡΪΣΚΘΙΥ͑ι ͣͨ͑͡͡ͽ͑ͶΝΖΔΥΣΠΟΚΔΤ͑͟ͺΟΔ͑͑͟ͲΝΝ͑ΣΚΘΙΥ͑ΣΖΤΖΣΧΖΕ͑͟
ΟΝΪ͑ΗΠΣ͑ΥΣΒΚΟΚΟΘ͑ΒΟΕ͑ΤΖΣΧΚΔΖ͑ΡΦΣΡΠΤΖΤ
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
69/140
4. TROUBLE SHOOTING
CHECKING FLOW
START
Check Battery Voltage
> 3.30V
Push power-on key
And check the level change
into high of POWERKEY
Check the voltage of
The LDO outputs at U102
Logic level at RPWRON of R101
=
HIGH(above 1.2V)?
Is the phone power on?
The phone will
Properly operating.
Charge or Change Battery
Check the contact of power key
Or dome-switch
Replace U102 (MT6253)
VCORE_PMU = 1.2V, VTCXO = 2.8V. VRF = 2.8V, VA = 2.8V
VM = 2.8V,VIO = 2.8V, VCAMA = 2.8V, VUSB = 3.3V,
VSIM1 = 3.0V, VSIM2 = 3.0V
Re-download software
Does it work properly?
Replace the main board
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Replace U102 and
Re-download software
Содержание LG-A155
Страница 1: ...Service Manual Model LG A155 Internal Use Only Service Manual LG A155 Date October 2010 Issue 1 0 ...
Страница 121: ... 122 LGE Internal Use Only Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 129: ... 130 LGE Internal Use Only Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes ...