LG 501C Service Manual page 91

LG501C
1
Is the voltage of TP1_U4303's pin #1&2
Is the voltage of TP2_U4303's pin #8&7
2
3
CHG_CNT_N & BAT_FET_N = 0V?
LG Electronics Inc.
START
Is the CN4303 soldered well?
YES
5V?
YES
5V?
YES
Check TP3
Is the battery voltage >2.6V?
YES
check CN4403, is it OK?
YES
Check TP4
YES
Change the main board
Checking Flow
NO
NO
NO
NO
NO
NO
91
Re-solder CON4303
TA or data cable may be out of order
So change the TA or data cable
Change the U4303
Change the battery
change CN4403
Change the main board