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3. TECHNICAL BRIEF
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3.10 Microphone
The microphone is placed to the front cover and contacted to main PCB. The audio signal is passed to AIN1P
and AIN1N pins of AD6537B. The voltage supply VMIC is output from AD6537B, and is a biased voltage for
the AIN1P. The AIN1P and AIN1N signals are then A/D converted by the voiceband ADC part of
AD6537B.The digitized speech (PCM 8KHz ,16KHz) is then passed to the DSP section of AD6527 for
processing (coding, interleaving etc).
3.11 Main Speaker
In the case of G692 , there are 3 different speakers. One is main speaker for the received voice, another are
loud speaker for playback of ring tone , key tone and other MIDI sounds and the other is headset speaker.
The main speaker is driven directly from AD6537B AOUT1P and AOUT1N pins and the gain is controlled by
the PGA in an AD6537B. The receiver is placed in the folder cover and connected to AOUT1x terminal via
FPCB.
(BSE, -42dB, FPCB Type)
CLOSE TO MIC
MIC
39p
C217
39p
C212
10u
C204
0.1u
C215
39p
R210
100
C208
100
R217
R202
1K
C211
39p
EVL5M02200
VA202
R206
2.2K
39p
C218
VA201
EVL5M02200
2V5_VMIC
R221
2.2K
VINNORN
VINNORP
Figure 3-25. Connection between Microphone and AD6537B
Содержание KG240
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model KG245 Service Manual KG245 ...
Страница 3: ... 4 ...
Страница 81: ...4 TROUBLE SHOOTING 82 4 13 KEY backlight Trouble TEST POINT Figure 4 20 a KEY Backlight Trouble ...
Страница 90: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Download Procedure 5 2 1 Computer Program file MultiGSM exe Click ...
Страница 92: ...5 DOWNLOAD AND CALIBRATION 93 5 2 3 Configuration Setting C GSMULTI Model MG210 dll ...
Страница 93: ...5 DOWNLOAD AND CALIBRATION 94 5 2 4 Press Start Button KG245 ...
Страница 94: ...5 DOWNLOAD AND CALIBRATION 95 5 2 5 After Start Button Which Stand by condition KG245 ...
Страница 95: ...5 DOWNLOAD AND CALIBRATION 96 5 2 6 SW downloading Condition KG245 ...
Страница 96: ...5 DOWNLOAD AND CALIBRATION 97 5 2 7 SW downloading END Condition KG245 ...
Страница 99: ...5 DOWNLOAD AND CALIBRATION 100 4 Click on CALIBRATION START button KG245 KG245 ...
Страница 100: ...5 DOWNLOAD AND CALIBRATION 101 6 BLOCK DIAGRAM ...
Страница 101: ... 102 ...
Страница 110: ... 111 8 PCB LAYOUT ...
Страница 111: ... 112 8 PCB LAYOUT ...
Страница 112: ... 113 KG245 8 PCB LAYOUT ...
Страница 113: ... 114 KG245 8 PCB LAYOUT ...
Страница 121: ...10 STAND ALONE TEST 122 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 125: ... 126 ...
Страница 127: ... 128 ...
Страница 145: ...Note ...
Страница 146: ...Note ...