Speaker No Sound - Blu Dash 4.5 Service Manual

3.5 Speaker no sound

First, check speaker ok or not, change a new one;
Second, check B1330、B1333、C1780、C1781、C1782, solder ok or not;
Third, check U2, re-hot or change a new one.
No sound
Is speaker OK?
Y
Are B1910, B1911
NC or not?
N
Check T1912,
T1913, C1929,
C1930, and C2001
ok or not?
Y
Check U1001
N
Replace
Speaker
Y
ADD B1910,B1911
N
Re-solder uncorrected
component
N
Hot or change U1001