Instruction Manual

Cautions
DN00204118 © Nokia Corporation 19 (22)
Issue 3- 0 en Nokia Proprietary and Confidential
The MU contains Electrostatic Sensitive Devices (ESD) label and stud, which
means that they may be permanently damaged by electrostatic discharges
encountered in routine handling, testing and transportation. The MU is labelled
with an electrostatic sensitive device symbol as shown in Figure 7.
Figure 7. Electrostatic sensitive device label
Electrostatic discharges are caused by direct contact or by an electrostatic field. If
a charged body approaches an electrically conducting surface, the acquired
potential is discharged. An equalizing current can then flow in the associated
circuitry and generate permanently damaging voltages by induction. The human
body should be grounded at the same potential as the component or equipment
being handled. A wrist strap creates an equipotential electrical connection
between the object and the human.
The MU has a grounding point (ESD stud) to which a wrist strap must be
connected, as seen in Figure 8.