Audio Concept; Audio Interface - Nokia 301 Service Manual

RM-839; RM-840; RM-841
System Module
Figure 52 vibrator interface

Audio concept

Audio interface

The functional core of the audio hardware is built around two ASICs; PMUIC (Power management unit) N2210
and main engine chipset ASIC D2800.
D2800 provides an interface for the transducers and the AV connector. There are three audio transducers:
• one earpiece
• one IHF speaker
• one microphone
N2210 provides an output for the vibra motor.
All external audio accessories are connected to the specific 3.5 mm AV connector. The following block diagram
illustrates the audio interface of the phone:
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