Nokia 6020b Service Manual
Issue 1 03/2005
COMPANY CONFIDENTIAL
21
Copyright © 2005 Nokia. All Rights Reserved.
RM-31
7 - System Module
7 - System Module
Nokia Customer Care
Function Groups
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Battery
A battery of the type BL-5B is used. It is a Li Ion based standard cell. The battery capacity is
760mAh.
760mAh.
The battery has a three-pin connector. In order to get temperature information of the battery,
the NTC mounted on the PWB within the BB area is used.
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.
Figure 4:Battery BL-5B
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Audio
Internal microphone
The internal microphone capsule is mounted to in the PopPort
TM
system connector. The micro-
phone 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 voltage. The micro-
phone input on the UEMEK is ESD protected. Spring contacts are used to connect the micro-
phone to the PWB.
microphone input is symmetric and the UEMEK (MICB1) provides bias voltage. The micro-
phone input on the UEMEK is ESD protected. Spring contacts are used to connect the micro-
phone to the PWB.