4. TROUBLE SHOOTING
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Only for training and service purposes
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͑
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ͑
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4.13.5. Microphone for headset
MIC for Headset path as below:
Insert Headset
Æ
Interrupt which are the signal of Headset detecting arise in EAR_SENSE
Æ
HS_MIC_BIAS:1.2~1.4V (MICBIAS)
Æ
MIC signal
Æ
TP1(FB605)
Æ
TP2( C317)
Æ
MSM7227
G
z
G
MGtGGjG
tpjiphzOj]W]PGGXUY¥XU[}f
G
tGGGGtpj
{GGGG
vGjGGq]WW
G
vGjGGtGi
’
G
{wXOmi]W\Pf
G
luk
G
lz
lz
lz
uv
{wYOjZX^PfG G
{GGGG G
yTGG{wX
G
uv
jGGx]WW
G
pGoG
vGjGGtGi
’
G
jGG{wY
G
uv
Make some sound to MIC
The signal appear at
TP1(FB600)?
No
Yes
The signal appear at
TP(C317)?
START
END
Re-solder at TP1
or Check the J600
No
Yes
MICBIAS(C606) is 1.~1.4V?
Yes
Insert Headset & Make a Call
No
Check the Q600 or Change the Main B’d
Check the TP
or Change the Main B’d