4 CONFIDENTIALCopyright © 2007 NOKIA. All rights reserved.620c RM-243/RM-30 / 62c RM-309/RM-309Page (3) ISSUE 2Service Manual Level &2Warnings and CautionsPlease refer to the phone’s user guide for instructions relating to operation, care and maintenance including impor-tant safety information. Note also the following:Warnings:CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED WITH ELECTRONIC ENGINE MANAGEMENT SYSTEMSAND ANTI–SKID BRAKING SYSTEMS. UNDER CERTAIN FAULT CONDITIONS, EMITTED RF ENERGY CAN AFFECT THEIROPERATION. IF NECESSARY, CONSULT THE VEHICLE DEALER/MANUFACTURER TO DETERMINE THE IMMUNITY OF VEHI-CLE ELECTRONIC SYSTEMS TO RF ENERGY.THE HANDPORTABLE TELEPHONE MUST NOT BE OPERATED IN AREAS LIKELY TO CONTAIN POTENTIALLY EXPLOSIVEATMOSPHERES, EG PETROL STATIONS (SERVICE STATIONS), BLASTING AREAS ETC.OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT, INCLUDING CELLULAR TELEPHONES, MAY INTERFERE WITHTHE FUNCTIONALITY OF INADEQUATELY PROTECTED MEDICAL DEVICES. CONSULT A PHYSICIAN OR THE MANUFACTUR-ER OF THE MEDICAL DEVICE IF YOU HAVE ANY QUESTIONS. OTHER ELECTRONIC EQUIPMENT MAY ALSO BE SUBJECT TOINTERFERENCE.Cautions:1. Servicing and alignment must be undertaken by qualified personnel only.2. Ensure all work is carried out at an anti–static workstation and that an anti–static wrist strap is worn.3. Use only approved components as specified in the parts list.4. Ensure all components, modules screws and insulators are correctly re–fitted after servicing and alignment.5. Ensure all cables and wires are repositioned correctly.1.2.3.Nokia requires that service points have sufficient ESD protection (against static electricity) whenservicing the phone.Any product of which the covers are removed must be handled with ESD protection. The SIM cardcan be replaced without ESD protection if the product is otherwise ready for use.To replace the covers ESD protection must be applied.All electronic parts of the product are susceptible to ESD. Resistors, too, can be damaged by staticelectricity discharge.All ESD sensitive parts must be packed in metallized protective bags during shipping and handlingoutside any ESD Protected Area (EPA).Every repair action involving opening the product or handling the product components must bedone under ESD protection.ESD protected spare part packages MUST NOT be opened/closed out of an ESD Protected Area.For more information and local requirements about ESD protection and ESD Protected Area, contactyour local Nokia After Market Services representative.WARNINGS AND CAUTIONS3.ESD PROTECTION4.