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4.17.4 Microphone for Main MIC
Main Microphone path as below:
MIC
→
C527,C528
→
MSM6250A
→
MIC feedback gain logic
→
MSM internal CODEC
MIC
C534
NA
R522
0
C526
47p
EVLC14S02050
VA520
NA
C535
22n
C527
C528
22n
3
G2
5
G3
1
OUT
PWR
4
SP0102BE3
U502
G1
2
10u
C519
MIC1N
MIC1P
MICBIAS
Near to MSM
Near to MSM
AUDIO
22n
C221
0.1u
C222
10p
C202
HPH_R
W15
HPH_L
W17
MICOUTN
W18
MIC1N
AF20
MICINP
AF22
AF24
CCOMP
EAR1OP
AF18
AUXIN_AUXIR
AF19
AUXIP_AUXIL
AE19
MIC1P
AE20
MICINN
AE22
MICBIAS
AE23
AUXON_AUXOR
AC18
AC19
MIC2P
MICFBP
AC20
MICFBN
AC21
AC17
EAR1ON
HKADC[5]
AUXOP_AUXOL
AA17
MIC2N
AA18
MICOUTP
AA19
C201
10p
C220
22n
MIC2N
MIC2P
RCV+
MID_SPK-
RCV-
HPL_L
HPL_R
VBAT_TEMP
MICFBN
MICFBP
MICOUTP
MICINP
MIC1N
MICINN
MIC1P
MICOUTN
GND_RET
MICBIAS
Start
MIC_BIAS(C519) is 1.8V
Change the Main Bíd
NO
Make a call
Can you scoping some
sound signal at C527,C528
Change the MIC
NO
YES
YES
Change the Main B'd
make some sound or
voice to MIC
Work well?
END
YES
NO
Z3X-BOX.COM
Summary of Contents for U300
Page 3: ... 4 Z 3 X B O X C O M ...
Page 24: ...3 TECHNICAL BRIEF 25 Figure 3 3 1 1 RFR6250 IC functional block diagram Z 3 X B O X C O M ...
Page 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram Z 3 X B O X C O M ...
Page 76: ...4 TROUBLE SHOOTING 77 4 5 Checking WCDMA Block Z 3 X B O X C O M ...
Page 77: ...4 TROUBLE SHOOTING 78 4 3 5 1 2 Z 3 X B O X C O M ...
Page 82: ...4 TROUBLE SHOOTING 83 4 5 5 Check RF Rx Level Test Point RF Rx Level Z 3 X B O X C O M ...
Page 85: ...4 6 Checking GSM Block 4 TROUBLE SHOOTING 86 Z 3 X B O X C O M ...
Page 87: ...4 TROUBLE SHOOTING 88 Z 3 X B O X C O M ...
Page 89: ...4 TROUBLE SHOOTING 90 Z 3 X B O X C O M ...
Page 92: ...4 TROUBLE SHOOTING 93 Z 3 X B O X C O M ...
Page 95: ...4 TROUBLE SHOOTING 96 Z 3 X B O X C O M ...
Page 110: ...4 TROUBLE SHOOTING 111 C515 C516 CN501 Z 3 X B O X C O M ...
Page 116: ...4 TROUBLE SHOOTING 117 C201 C202 for MIC capacitor Z 3 X B O X C O M ...
Page 119: ...4 TROUBLE SHOOTING 120 Q400 Q401 Q402 VBATT GND Z 3 X B O X C O M ...
Page 140: ...6 BLOCK DIAGRAM 141 Z 3 X B O X C O M ...
Page 141: ...6 2 Interface Diagram U300 Interface Diagram 6 BLOCK DIAGRAM 142 Z 3 X B O X C O M ...
Page 149: ... 150 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 150: ... 151 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 151: ... 152 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 152: ... 153 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 153: ... 154 Z 3 X B O X C O M ...
Page 156: ...9 Calibration 157 Check testing object Click Start for Calibration Z 3 X B O X C O M ...
Page 157: ...9 Calibration 158 Show result of calibration Show result Z 3 X B O X C O M ...
Page 159: ... 160 Z 3 X B O X C O M ...
Page 183: ...Note Z 3 X B O X C O M ...
Page 184: ...Note Z 3 X B O X C O M ...