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4.6 Microphone Trouble
•
Microphone Signal Flow
•
Check Points
- MIC is enable by MICBIAS
- Microphone bias
- MICBIAS, MICP, MICN signals from AD6555(ABB)
- Audio signal level of the microphone
- Soldering of components
- Trouble Shooting Procedure
- Check the bias of the microphone.
- Check the audio signal path.
- Check the soldering.
- Check the microphone.
C109
39p
NC_R12
R12
R16
AIN1N
P16
AIN1P
AIN2N
R15
AIN2P
P15
R13
AIN3L
R14
AIN3R
39p
C113
C114
39p
39p
C110
C115
39p
AUX_MICN
AUX_MICP
MICN
MICP
(1608)
CLOSE TO MIC
CLOSE TO MIC
MIC
R250
0
2V5_VMIC
27p
C232
C228
4.7u
R221
100
R237
2.2K
VA204
ECVAS1005-14A30-120NBT
C226
0.1u
R236
2.2K
27p
C231
39p
C229
1K
R238
100
R220
C230
27p
ECVAS1005-14A30-120NBT
VA205
MIC201
OBG-410L44-C153
1
2
MICN
MICP
ABB(AD6555XBC)
Go to
ABB(AD6555XBC)
Circuit Diagram
R238
R236
Microphone
R221:MIC_P
R220:MIC_N
C215
Test Point
Z3X-BOX.COM
Содержание CE500
Страница 1: ...Service Manual Model CE500 Service Manual CE500 Date September 2005 Issue 1 0 Z 3 X B O X C O M ...
Страница 3: ... 4 Z 3 X B O X C O M ...
Страница 14: ...3 Technical Brief 15 3 1 4 Digital Baseband DBB Processor Block diagram of the AD6532 Z 3 X B O X C O M ...
Страница 36: ...4 TROUBLE SHOOTING 37 Test Point VEXT VRTC VMEM VINT VSIM VPLL VUSB VABB VTCXO VCORE VMIC Z 3 X B O X C O M ...
Страница 77: ...4 TROUBLE SHOOTING 78 5 Check Tx I Q TXQP TXQN TXIN TXIP U704 Test Point Z 3 X B O X C O M ...
Страница 85: ...Note 86 Z 3 X B O X C O M ...
Страница 93: ... 94 8 PCB LAYOUT Z 3 X B O X C O M ...
Страница 94: ... 95 8 PCB LAYOUT Z 3 X B O X C O M ...
Страница 95: ... 96 Z 3 X B O X C O M ...
Страница 103: ...9 CALIBRATION 104 L Standalone Test Equipment Setup Oscilloscope Z 3 X B O X C O M ...
Страница 105: ... 106 Z 3 X B O X C O M ...
Страница 127: ...Note 128 Z 3 X B O X C O M ...