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3.10.11.2. Audio Signal Processing & Interface
Audio signal processing is divided Uplink path and downlink path. The uplink path amplifies the audio
signal from MIC and converts this analog signal to digital signal and then transmit it to DBB Chip
(MSM6250A).
This transmitted signal is reformed to fit in GSM & WCDMA Frame format and delivered to RF Chip.
The downlink path amplifies the signal from DBB chip (MSM6250A) and outputs it to Receiver (or
Speaker).
The receive path can be directed to either one of two earphone amplifiers or the auxiliary output. The
outputs earphone1 (EAR1OP, EAR1ON) and Auxiliary out (AUXOP, AUXON) are differential outputs.
Earphone2 (HPH_L,EAR2O) is a single-ended output stage. The microphone interface consists of two
differential microphone inputs, one differential auxiliary input and a two-stage audio amplifier.
Figure Audio Interface Detailed Diagram(MSM6250A)
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Summary of Contents for L601i
Page 1: ...Date October 2006 Issue 1 0 Service Manual Model L601i Service Manual L601i Z 3 X B O X C O M ...
Page 3: ... 4 Z 3 X B O X C O M ...
Page 45: ...3 TECHNICAL BRIEF 46 Figure PM6650 2 Functional Block Diagram Z 3 X B O X C O M ...
Page 105: ...4 TROUBLE SHOOTING 106 Audio AMP 22 and 23 pin of CN501 Z 3 X B O X C O M ...
Page 109: ...4 TROUBLE SHOOTING 110 Ear_sense_n pin R506 R507 R505 Z 3 X B O X C O M ...
Page 112: ...4 TROUBLE SHOOTING 113 Q400 Q401 VBAT T GND Z 3 X B O X C O M ...
Page 125: ...5 DOWNLOAD 126 Click on X button to use another function Z 3 X B O X C O M ...
Page 130: ...6 BLOCK DIAGRAM 131 6 2 Interface Diagram L601i Interface Diagram Z 3 X B O X C O M ...
Page 132: ...6 BLOCK DIAGRAM 133 Top Side Z 3 X B O X C O M ...
Page 133: ... Bottom Side 6 BLOCK DIAGRAM 134 Z 3 X B O X C O M ...
Page 141: ... 142 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 142: ... 143 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 143: ... 144 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 144: ... 145 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 145: ... 146 Z 3 X B O X C O M ...
Page 151: ... 152 Z 3 X B O X C O M ...
Page 153: ... 154 Z 3 X B O X C O M ...
Page 176: ...Note Z 3 X B O X C O M ...
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