- 31 -
3. TECHNICAL BRIEF
(2) Key Backlight Illumination
There are 6 blue LEDs for key backlight illumination which are driven by KEY_BACKLIGHT
signal from AD6525.
Figure 3-16. Circuit Diagram of Key backlight illumination
3.11 Microphone
The microphone is placed to the front cover and is connected to main PCB. The audio signal is
passed to VINNORP and VINNORN pins of AD6521. The voltage supply 2V55_VAN is output
from ADP3522, and is a bias voltage for the VINNORP.
The VINNORP and VINNORN signals are A/D converted by the Voiceband ADC part of
AD6521. The digitized speech is then passed to the DSP section of AD6525 for processing
(coding, interleaving etc).
Figure 3-17. Circuit Diagram of Microphone.
(1608)
R211
100
VA202
R210
2K
C221
39p
10u
C217
VA203
C250
10u
1
2
39p
C222
MIC200
OB4-15L42-C33L
R215
2K
1K
R208
R240
0
C219
39p
SP203
C216
39p
100
R214
SP202
C220
VINNORN
VINNORP
KEY BACKLIGHT
R316
0
100K
R315
C319
27p
R310
47
C322
27p
C323
C317
27p
0.1u
15
R317
R312
0
R314
4.7K
LD300
LEBB-S14H
27p
C320
R308
47
27p
C321
R306
47
47
R309
10K
R311
LEBB-S14H
LD305
C318
0.1u
LEBB-S14H
LD303
LEBB-S14H
LD301
1.5K
R313
47
R305
IMX9T110
Q301
2
56
3
1
4
LEBB-S14H
LD304
LD302
LEBB-S14H
27p
C324
47
R307
COM
5
3
GND
IN
1
4
NC
NO 6
VCC
2
MAX4599EXT-T
U302
KEY_BACKLIGHT
RPWRON
Содержание C3100
Страница 1: ...Service Manual Model C3100 Service Manual C3100 P N MMBD0033001 Date June 2004 Issue 1 0 ...
Страница 51: ...Graph 4 15 EGSM TX 50 VCX VC2 VCX VC2 4 TROUBLE SHOOTING Graph 4 14 DCS TX ...
Страница 67: ...5 DISASSEMBLY INSTRUCTION Figure 5 1 Figure 5 2 66 5 DISASSEMBLY INSTRUCTION ...
Страница 68: ... 67 5 DISASSEMBLY INSTRUCTION Figure 5 3 Figure 5 4 ...
Страница 69: ... 68 Figure 5 5 5 DISASSEMBLY INSTRUCTION ...
Страница 70: ... 69 5 DISASSEMBLY INSTRUCTION Figure 5 6 Figure 5 7 1 3 2 4 1 2 3 ...
Страница 71: ... 70 Figure 5 8 Figure 5 9 5 DISASSEMBLY INSTRUCTION 4 2 3 1 2 1 ...
Страница 72: ... 71 5 DISASSEMBLY INSTRUCTION Figure 5 10 ...
Страница 83: ... 82 7 BLOCK DIAGRAM 7 BLOCK DIAGRAM Power supply ...
Страница 90: ... 89 9 PCB LAYOUT 9 PCB LAYOUT ...
Страница 91: ... 90 9 PCB LAYOUT ...
Страница 98: ... 97 11 3 HW Test Software for Standalone Test Setup 11 STAND ALONE TEST ...
Страница 100: ... 99 Tx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 102: ... 101 Rx Stand alone Test Setting 11 STAND ALONE TEST ...
Страница 104: ... 103 12 3 Equipment Setup Figure 12 1 Equipment Setup 12 AUTO CALIBRATION ...
Страница 107: ... 106 12 AUTO CALIBRATION ...
Страница 108: ... 107 13 EXPLODED VIEW REPLACEMENT PART LIST 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...
Страница 109: ... 108 13 EXPLODED VIEW REPLACEMENT PART LIST ...