Nokia 7650 Service Manual
System Module LG4 and Grip Module LS4
CCS Technical Documentation
Page 62
¤Nokia Corporation
Issue 2 11/02
Hall Sensor and Magnet
NHL-2NA uses the Infineon Hall sensor TLE 4917 (NMP code 4341087) and magnet to
find out the open/close position of the grip. The hall sensor component is in the trans-
ceiver unit and the magnet is in the grip module. See figure 9 for more information.
find out the open/close position of the grip. The hall sensor component is in the trans-
ceiver unit and the magnet is in the grip module. See figure 9 for more information.
Magnet
NHL-2NA magnet (NMP code 6490201) locates on grip module.
Figure 39: Basic principle of the hall-sensor implementation
Note: Hall sensor is independent on magnet flow direction, i.e. the magnet can be
assembled in two ways; North-pole up or down.
Hall-Sensor
N
S
GRIP
LS4
Transceiver
LG4