3. TECHNICAL BRIEF
- 43 -
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.
CLOSE TO MIC
2.2K
R204
R200
1K
0
R207
39p
C215
10u
C204
VA202
EVL5M02200
C210
39p
0.1u
C213
EVL5M02200
VA200
C216
39p
39p
C203
2.2K
1
2
R214
SOB-413S44-RC3310
MIC200
100
R231
100
R210
2V5_VMIC
C233
39p
VINNORP
VINNORN
Figure 3-28. Connection between Microphone and AD6537B
Summary of Contents for S5000
Page 1: ...Date November 2005 Issue 1 0 Service Manual S5000 Service Manual Model S5000 ...
Page 3: ... 4 ...
Page 82: ...4 TROUBLE SHOOTING 83 4 12 KEY backlight Trouble Test Points Figure 4 21 ...
Page 101: ...5 DOWNLOAD AND CALIBRATION 102 9 Phone test Finish is shown in below screen ...
Page 103: ... 104 ...
Page 111: ... 112 8 PCB LAYOUT ...
Page 112: ... 113 8 PCB LAYOUT ...
Page 113: ... 114 ...
Page 121: ...10 STAND ALONE TEST 122 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 125: ... 126 ...
Page 126: ... 127 ...
Page 128: ... 129 12 EXPLODED VIEW REPLACEMENT PART LIST ...
Page 129: ... 130 ...