LG VX8610 Service Manual page 89

VX8610
START
Check battery voltage > 3.4V
Push power - on key and
check the level change of U400
PWR_ON_SW
Check the voltage of
the following port at U301
+1.4V_MSMC
+1.8V_MSMP
+2.6V_MSMP
+2.6V_MSMA
+2.8V_TCXO
Logic level at PS _ HOLD (R 409)
of U400=High ?
Does it work properly?
The Phone will power on
Copyright © 2007 LG Electronics. Inc. All right reserved
Only for training and service purposes
Checking Flow
Checking Flow
NO
YES
301
NO
YES
NO
YES
NO
YES
NO
YES
Re-download software
and try again
Charge of Change Battery and try again
Check the contact of power-key
Replace U400
Re-download software
and try again
YES
Does it work properly?
- 88 -
NO
Re-download software
and try again
LGE Internal Use Only