Batteries; Keyboard - Nokia 2650 Service Manual

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Batteries

Type:BL-4C battery
Technology:Li-Ion. 4.2V charging. 3.1V cut-off
Capacity:760 mA/h
The BSI values for the batteries:
Inside the battery, an over-voltage protection circuit are present.
The battery does not contain a temperature sensor. Since the battery is using the Li-Ion tech-
nology, care should be taken while charging. The material might be overheated when charged
above 60 degrees Celsius. Charging should be terminated when this temperature is reached.
An external temperature sensor (NTC resistor) is placed on the PWB close to the end of the
battery.

Keyboard

The keyboard PWB layout consists of a grounded outer ring and an inner pad see Figure 8.
The keyboard is not a matrix keyboard, but is connected direct to UPP. The following table
shows the keyboard connection.
UPP Pin RH-53 Key
GenIO1 0
GenIO2/ 7
P05
26
Figure 7:BL-4C battery
Figure 8:Keyboard PWB layout
Table 14:
Overview of keyboard configuration
In/ Internal Pull
Out Up/down
In Up
In Up
COMPANY CONFIDENTIAL
Copyright © 2005 Nokia. All Rights Reserved.
8-System Module
Interrupt
GenIOInt5 Falling edge interrupt
P0 int Falling edge interrupt
RH-53/54
Issue 2 06/2005