External Earpiece; Vibra; Av Connector - Nokia RM-721 Service Manual

RM-721; RM-722
System Module
Figure 35 AV connector

External earpiece

An external earpiece can be connected to the device via the 3.5 mm AV connector (X2100) located at the top
side of the phone.
The external earpiece is directly driven by the internal amplifier of PEARL_J. There are no external amplifiers.

Vibra

The vibra (M2100) is a mounted SMD located at the bottom side of the main board. It is supplied directly from
the PEARL_J vibra outputs.
Figure 36 Vibra

AV connector

The 3.5mm AV connector consists of mono or stereo audio output, mono audio input and optional features
like control data over microphone line.
A connected male connector is detected on pin 6 (PLUG_DET).
Accessories are detected as basic headset (no ECI) or as intelligent ECI communication devices.
Note: Only use an approved cable for connecting to the AV connector ( e.g. headset HS-47).
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