Fail To Charge - Blu Dash 4.5 Service Manual

3.2 Fail to charge

Check charging circuit related component, check below information in sequence:
First, checks whether boot normal use the battery, if not check battery connector solder ok
or not;
Second, check USB connector on board solder ok or not;
Third, check T1110 whether reverse, check C1321resistance is very big or not, check
B1110，B1111 solder ok or not;
Fourth, check U2 solder ok or not, re-hot U2 or change a new one.
No charge
Check battery
can power on
normal or not?
Y
Check J1702
solder OK or not?
Y
Check
T1110&C1321
Y
Check B1110,B1111
and Q601 ok or not?
Y
Check U2
Check battery
N
connector related
component
N
Change a new
one
N Change T1110
or C1321
N
Change related
component
N
Hot or change U2.