External Audio Connector; External Signals And Connections - Nokia RH-64 Service Manual

RH-64
System module

External audio connector

The system connector, containing a 4-pole Jack plug, gains the access to the external audio interface. The Jack
plug, which is integrated in the system connector, contains a mechanical switch, which is used to detect the
connection of the accessories. The configuration for the 4-pole Jack-plug is shown in the following figure.
Line symbol
XMICP
XMICN
XEARP
XEARN
INT
GND

External signals and connections

Signal From
XMICP HS/HF Mic
XMICN
9243363 (Issue 1)
Figure 147 4-pole jack plug for audio accessory
Table 13 Connector for External Audio Accessories
Table 14 System connector
To Min Nom
UEMC 2/60mV
Lite diff
2/60mV
diff
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Function
External microphone signal input
External microphone signal input
External earphone signal output
External earphone signal output
Accessory detection
Ground (Only used by PPH-1)
Max Condi-tion
Analog
audio in
DC bias
2V2kohm
Ana in / 1k to
GND
Nokia Customer Care
Note
Headset Mic bias and audio
signal 2mV nominal. HF Mic
signal 60mV nominal.
Differential symmetric
input.
Accessory detection by
bias loading
Hook interrupt by heavy
bias loading
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