Page 13 of 24
2.2.3.2
MIC& Receiver Loop
MIC
Audio path
is shown below
：
MIC must have a bias voltage in order to operate normally
——
2.0
±
0.1V. When MIC is in good condition but loop MIC has no echo, then you need to check the basic bias
voltage signal of the MICBIASP and MICBIASSP, the language signals of the RECEIVER and MIC also
need to be checked.
Receiver loop is simple. The output of BB drive Receiver directly through Filter and ESD protected
network, as shown below:
Summary of Contents for VIVO 4.8
Page 1: ...Page 1 of 24 BLU VIVO 4 8 Service Manual ...
Page 20: ...Page 20 of 24 2 2 4 9 M sensor Circuit 2 2 4 10 Gyroscope Circuit ...
Page 21: ...Page 21 of 24 3 Service tools equipment list ...
Page 22: ...Page 22 of 24 ...
Page 23: ...Page 23 of 24 4 Disassembly Instruction 5 ...
Page 24: ...Page 24 of 24 ...
