Servicemanual_aurora_435_450_english_V3_032530.50.04_Korrektur.doc 5
1.4 Note on Electrostatic Discharge (ESD)
Protection of electrical and electronic components against electrostatic
discharges
Be sure to follow these important guidelines:
1. Always work at a stationary, ESD-compliant workstation equipped with the appropriate protective
devices including conductive table and floor mat, earth connection box and earthing wristband when
doing service work.
The cable of the earthing wristband must have a built-in resistance of 1 M ohm to ensure protection.
2. Always put on an earthing wristband before starting to work. Always remove any synthetic parts like
plastic bags, covers etc. from your workstation.
3. Only open ESD protective packaging at your ESD-proof workstation while wearing an earthing
wristband. Electronic components must be placed on conductive table mats only. Packing is carried
out under the same conditions.
4. Only use conductive plastic/foil pouches and ESD transport boxes for dispatching electronic
components – even if the components might be faulty.
5. Treat faulty PCBs the same as good ones to prevent addition harm.
Electrostatic charges are caused by:
• a person's walking (influence) over synthetic tilled or carpeted floor
• friction between and separation of two insulating materials (triboelectricity)
If this static electricity discharges through electronic components, these may
be partially or irreparably damaged. Electrostatically charged persons
represent the greatest danger for components. This can be dissipated by
controlled electrostatic discharge.
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