Internal Earpiece; Internal Handsfree (Ihf) Speaker - Nokia RM-779 Service Manual

RM-779
System Module

Internal earpiece

The internal earpiece used is Petra (8X12) and is connected to EM ASIC EARP and EARN lines.
Figure 59 Internal earpiece diagram

Internal handsfree (IHF) speaker

IHF speaker used is Mean and is connected to BoostMono Vallu N2150. Vallu is a mono D-class speaker
amplifier with an integrated inductive boost converter. Vallu's differential audio inputs are connected to EM
ASIC Gazoo/Pearl XEarL, XEarLC and it can be enabled/disabled by Genout105 from Rapu.
Figure 60 Internal handsfree (IHF) speaker diagram
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