Audio - Nokia RM-11 Series Troubleshooting Manual

CC Technical Documentation
100%. The maximum charging current is limited to 1.2 A.
UEM Pins
N10
.22 Ohms
M10

Audio

The audio control and processing is supported by the UEM, which contains the audio
codec, and by the UPP, which contains the MCU and DSP blocks that handle and process
the audio data signals.
The baseband supports three microphone inputs and two earpiece outputs. The
microphone inputs are MIC1, MIC2, and MIC3. MIC1 input is used for the mobile
terminal's internal microphone; MIC2 is used for headsets (HDB-4). MIC3 is used for the
Universal Headset. Every microphone input can have either a differential or a single-
ended AC connection to the UEM circuit. The internal microphone MIC1 and external
microphone MIC2 for Pop-port
Universal Headset interface is single-ended. The microphone signals from different
sources are connected to separate inputs at the UEM. Inputs for the microphone signals
are differential. Also, the MICB1 is used for MIC1 and the MICB2 is used for MIC2 and
MIC3 (Universal Headset).
Issue 2 09/2005
R200
Figure 13: Charging circuit at battery
accessory detection are both differential. However, the
TM
©2005 Nokia Corporation
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