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4.18.4 Microphone for Main MIC
Main Microphone path as below:
MIC -> C534,C535 -> MSM6250 -> MIC feed back gain logic -> MSM internal CODEC
4. TROUBLE SHOOTING
- 116 -
MIC
0.022u
C535
47p
U505
SP0102BE3
2
G1
G2
3
G3
5
OUT
1
4
PWR
C537
C1120
33p
C533
NA
R529
NA
0
R528
C534
0.022u
C1119
10p
C536
NA
10u
C538
R527
NA
MIC1N
MIC1P
MICBIAS
Near to MSM
0.1u
C239
W15
HPH_R
W17
HPH_L
W18
MICOUTN
AF18
EAR1OP
AF19
AUXIN_AUXIR
AF20
MIC1N
AF22
MICINP
AF24
CCOMP
AE19
AUXIP_AUXIL
AE20
MIC1P
AE22
MICINN
AE23
MICBIAS
AC17
EAR1ON
AC18
AUXON_AUXOR
MIC2P
AC19
AC20
MICFBP
AC21
MICFBN
AB23
HKADC[5]
MIC2N
AA19
MICOUTP
AA17
AUXOP_AUXOL
AA18
0.022u
C200
0.022u
C201
MIC2N
MIC2P
RCV-
RCV+
HPL_L
HPL_R
VBAT_TEMP
MICOUTP
MICINP
MIC1N
MICINN
MIC1P
MICFBN
MICFBP
MICOUTN
GND_RET
MICBIAS
Start
MIC_BIAS(C537) is 1.8V
Change the Main B'd
NO
Make a call
Can you scoping some
sound signal at C534,C535
Change the MIC
NO
YES
YES
Change the Main B'd
make some sound or
voice to MIC
Work well?
END
YES
NO
Summary of Contents for U880
Page 1: ...Date November 2005 Issue 1 0 Service Manual Model U880 Service Manual U880 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 32: ...3 TECHNICAL BRIEF 33 Figure 3 5 6 1 GSM PA functional block diagram ...
Page 35: ...3 TECHNICAL BRIEF 36 Figure 3 5 10 1 Bluetooth system architecture ...
Page 50: ...3 TECHNICAL BRIEF 51 Figure 3 10 3 2 1 PM6650 Functional Block Diagram ...
Page 114: ...4 TROUBLE SHOOTING 115 Loud Speaker U502 U503 Amp ...
Page 118: ...4 TROUBLE SHOOTING 119 C200 C201 for MIC serial capacitor ...
Page 121: ...4 TROUBLE SHOOTING 122 Q404 Q403 Q402 VBATT GND ...
Page 128: ...5 DOWNLOAD 129 5 Choose a Module Image file after clicking on the Browse button ...
Page 143: ...6 BLOCK DIAGRAM 144 6 3 Interface Diagram U880 Interface Diagram ...
Page 145: ... 146 ...
Page 154: ... 155 8 PCB LAYOUT ...
Page 155: ... 156 8 PCB LAYOUT ...
Page 156: ... 157 8 PCB LAYOUT ...
Page 157: ... 158 8 PCB LAYOUT ...
Page 158: ... 159 8 PCB LAYOUT ...
Page 159: ... 160 8 PCB LAYOUT ...
Page 166: ...9 CALIBRATION 167 Click START button U880 U880_ver1 1 U880 U880 Click U880 ...
Page 167: ... 168 ...
Page 168: ... 169 ...
Page 170: ... 171 ...
Page 171: ... 172 ...
Page 196: ...Note ...
Page 197: ...Note ...