Nokia 301 Service Manual page 168

Hook key detection
The hook key detection circuit is placed near ASIC, XAudio[1] is connected to PLUG_DET in the figure "Headset
interface".
Vibrator
The Vibrator is SMD and place on PWB, and driven by external PMU (MAX8939).
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Figure 61 Hook detect
Figure 62 Vibrator driver side
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RM-839; RM-840; RM-841
System Module
Issue 1