Internal Speakers; Vibra Circuitry; Accessory Av Connector - Nokia RM-506 Service Manual

RM-505; RM-506
System Module and User Interface
Figure 83 Internal earpiece circuitry

Internal speakers

Internal speakers are used for Internal HandsFree (IHF) call mode, video call, ringing tones, FM radio and
music listening.
Two dynamic 8x12mm speakers are connected to Avilma ASIC's outputs XearR/XearL via stereo D-class IHF
amplifier TPA2012D2. The amplifier has 12 dB fixed gain and it is put to shutdown mode when not in use.
Figure 84 Internal speakers

Vibra circuitry

Vibra is used for the vibra alarm function.
The vibra motor is connected to the Avilma ASIC VibraP and VibraN Pulse Width Modulated (PWM) outputs.
Figure 85 Vibra circuitry

Accessory AV connector

The features that are supported by Ivalo accessory interface are the following:
• Audio output (stereo headset/headphones having the impedance >16ohm)
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