3. H/W Circuit Description
- 28 -
3) Acoustic Function
The voice link is composed of two part. One is Up-link. The other is Down-link.
i. Up-link path.
A voice signal is converted to electrical signal with Microphone. The converted electrical voice signal is
amplified and converted to digital signal in ABB(TWL3016, TI). The converted digital data is encoded
to GSM voice standard in DBB(C).
The audio signal from main microphone goes to MICP of ABB and the voice signal from head-set to
HSMIC of ABB. The bias voltage for microphone is 2V for main mic. and 2.5V for head-set mic, which
bias voltage is generated in ABB(MICBIAS, HSBIAS)
Figure 13. Voice circuits of ABB(TWL3014)
Figure 14. Main Mic. Circuits.
NA
C110
100p
C109
C114
0.1u
0.1u
C113
100p
C117
SPKN1
A7
SPKN2
B7
A6
SPKP1
B6
SPKP2
HSMIC
A11
HSMICBIAS
B10
HSOL
A9
A10
HSOR
HSOVMID
B9
C9
MICBIAS
MICIN
A12
MICIP
B12
B8
EARN
A8
EARP
B11
AUXI
C8
AUXO
C112
NA
C116
100p
L102
100nH
0
R129
100nH
L101
L105
100nH
R130
0
L104
100nH
L103
100nH
C118
100p
C115
4.7u
C111
NA
HSOL
MICN
HSMIC
HSOR
HSBIAS
MICBIAS
MICP
MAIN_MIC_CKTs
C126
2
G1
3
G2
G3
5
OUT
1
4
PWR
10u
MIC101
SP0102BE3
C313
100p
C125
100p
EVLC14S02050
VA307
0.1u
C322
100p
C124
100nH
L107
C120
0.1u
100p
C312
VA306
EVLC14S02050
L106
100nH
100nH
L104
MICBIAS
MICP
MICN
Summary of Contents for MG810c
Page 1: ...Date May 2006 Issue 1 0 Service Manual MG810c MG810d Service Manual Model MG810c MG810d ...
Page 3: ... 2 ...
Page 5: ......
Page 46: ...4 TROUBLE SHOOTING 45 WR CS ADSSSSS CS ADSSSSS WR ...
Page 52: ...4 TROUBLE SHOOTING 51 G 1 Speaker Receiver Trouble Shooting Common Path ...
Page 53: ...4 TROUBLE SHOOTING 52 G 2 Speaker Receiver Trouble Shooting Acoustic Path ...
Page 54: ...4 TROUBLE SHOOTING 53 G 3 Speaker Receiver Trouble Shooting MP3 AAC Path ...
Page 55: ...4 TROUBLE SHOOTING 54 G 4 Speaker Receiver Trouble Shooting FM Radio Path ...
Page 56: ...4 TROUBLE SHOOTING 55 G 5 Main Mic Path Trouble Shooting ...
Page 57: ...4 TROUBLE SHOOTING 56 G 6 Ear Mic Receiver Path Trouble Shooting ...
Page 58: ...4 TROUBLE SHOOTING 57 G 7 Ear Mic Mic Path Trouble Shooting ...
Page 59: ...4 TROUBLE SHOOTING 58 G 8 Vibrator Trouble Shooting ...
Page 60: ...4 TROUBLE SHOOTING 59 4 2 RF Part Troubleshooting A RF Receiving Path Trouble Shooting ...
Page 64: ...4 TROUBLE SHOOTING 63 E RF Receiving Path Trouble Shooting FEM 1 ...
Page 65: ...4 TROUBLE SHOOTING 64 F RF Receiving Path Trouble Shooting FEM 2 ...
Page 67: ...4 TROUBLE SHOOTING 66 H RF Transmitter Path Trouble Shooting ...
Page 73: ...4 TROUBLE SHOOTING 72 N RF Transmitter Path Trouble Shooting FEM 1 ...
Page 74: ...4 TROUBLE SHOOTING 73 O RF Transmitter Path Trouble Shooting FEM 2 ...
Page 84: ...6 Block Diagram 83 6 Block Diagram ...
Page 85: ... 84 ...
Page 96: ... 95 8 PCB LAYOUT ...
Page 97: ... 96 8 PCB LAYOUT ...
Page 98: ... 97 8 PCB LAYOUT ...
Page 99: ... 98 8 PCB LAYOUT ...
Page 100: ... 99 8 PCB LAYOUT ...
Page 101: ... 100 8 PCB LAYOUT ...
Page 111: ... 110 ...
Page 113: ... 112 ...
Page 133: ...Note ...
Page 134: ...Note ...