Power On Trouble - LG VX8560 Service Manual

VX8560
4.3 Logic Part Trouble
4.3.1 Power
4.3.1.1 Power-On Trouble
START
Check battery voltage ≥ 3.4V
YES
1
Push power-on key and
check the level change of U200
PWR_ON_SW/
YES
Check the voltage of
2
the following port at U200
+1.3V_MSMC
+1.8V_MSME1
+2.6V_MSMP
+2.1V_MSMA
+2.8V_TCXO
YES
3
Logic level at PS _ HOLD(CON200)_
of U200 High ?
YES
Does it work properly ?
YES
The Phone will power on
LG Electronics Inc.
Checking Flow
Checking Flow
Charge of Change Battery and try again
.
NO
NO
NO
NO
NO
Re-download software
and try again
Check the contact of power -key
Replace U200
Re-download software
and try again
YES
Does it work properly ?
NO
Re-download software
and try again
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