Function Groups; Battery; Audio; Internal Microphone - Nokia RH-37 Series Manual

RH-37
System Module

Function Groups

Battery

A battery of the type BL-5B is used. It is a Li Ion based standard cell. The battery capacity
is 760mAh.
The battery has a three-pin connector (BTEMP is not used). The battery does not support
temperature measurement inside the battery pack. In order to get temperature informa-
tion of the battery, the NTC mounted on the PWB within the BB area is used.
Ni based batteries are not supported.
The BSI resistor has a nominal value of 75 kOhm.

Audio

Internal microphone

The internal microphone capsule is mounted to in the PopPort
microphone is omni directional and it's connected to the UEMEK microphone input
MIC1P/N. The microphone input is symmetric and the UEMEK (MICB1) provides bias volt-
age. The microphone input on the UEMEK is ESD protected. Spring contacts are used to
connect the microphone to the PWB.
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Figure 5: Battery BL-5B
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system connector. The
Issue 1 07/04