External Earpiece - Nokia RM-132 Service Manual & Parts Manual

RM-132; RM-133
System Module Nokia Customer Care
Figure 89 Internal speaker circuitry

External earpiece

All galvanic accessories are connected to the system connector.
The accessory audio mode is automatically enabled/disabled during connection/disconnection of dedicated
phone accessories.
N2200 provides two output channels in either single-ended or differential format. N2200 outputs XearL and
XearLC for the left channel audio output, and XearR and XearRC the right channel audio output. XearLC and
XearRC are the ground pins if using single-ended mode. On the system connector side, HSEAR_P and HSEAR_N
form the left channel output, and HSEAR_R_P and HSEAR_R_N the right channel output. HSEAR_N and HSEAR_R_N
are the ground pins in single-ended mode.
Issue 1 COMPANY CONFIDENTIAL Page 9 –23
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