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Fault 3: plug in your headphones, there are tips, but no sound headphones;
Repair process: first rule headset monomer problem, then plug in your headphones and
play the ring tone and other audio signals with an oscilloscope measurement HPLP \
HPRP out from the baseband chip signal, and then followed by measurement of C802,
C803,
R801,
R802 side, then B801, B802-side, then turn the
problem。
2013-10-18
YU220 service manualV1.0
First plug in your
headphones and then
Yes
Replace
earphone
connector
OK
Huawei secrets, no dispersion without permission
unplug
Is
EINT _HP
lower
Earphone
connecto
Pin4 and
r
conne
Pin5
ct
No
Short
Yes
curre
D808
nt
Rep;a
No
D808
ce
Replace or
U501
plug weld
investigation where
the
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