External Earpiece And Microphone; Ahj Connector - Nokia Lumia 1320 Service Manual

RM-994/ RM-995/ RM-996
System Module

External earpiece and microphone

The AHJ headset earpiece is connected to WCD9304 (U2100) which is used for high quality audio output
and to guarantee long playback time for accessory use.

AHJ connector

The AHJ connector handles both audio and video signals output. It has audio left and right signals
separately
(Pins 5 and 3) and the microphone signal wired to pin 1.
Figure 52 AHJ connector pole positions
Figure 53 AHJ connector diagram
The plug detection signal handles the AHJ connector plug detection with HSJ_DET signal from MSM8930/
8230 at GPIO_37.
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