1 Safety Precautions1.1. General Guidelines1. IMPORTANT SAFETY NOTICEThere are special components used in this equipmentwhich are important for safety. These parts are marked byin the Schematic Diagrams, Circuit Board Layout,Exploded Views and Replacement Parts List. It is essentialthat these critical parts should be replaced withmanufacturer’s specified parts to prevent shock, fire, orother hazards. Do not modify the original design withoutpermission of manufacturer.2. An Isolation Transformer should always be used during theservicing of AC Adaptor whose chassis is not isolated fromthe AC power line. Use a transformer of adequate powerrating as this protects the technician from accidentsresulting in personal injury from electrical shocks. It will alsoprotect AC Adaptor from being damaged by accidentalshorting that may occur during servicing.3. When servicing, observe the original lead dress. If a shortcircuit is found, replace all parts which have beenoverheated or damaged by the short circuit.4. After servicing, see to it that all the protective devices suchas insulation barriers, insulation papers shields are properlyinstalled.5. After servicing, make the following leakage current checksto prevent the customer from being exposed to shockhazards.3VDR-D210P / VDR-D220P / VDR-D230P / VDR-D210PC / VDR-D220PC / VDR-D230PC