Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone Nokia_3310 NHM5-028

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>> Download NHM5-028 documenatation <<

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                                                   CONFIDENTIAL                     1 (2)




Nokia Mobile Phones                                Service Bulletin No. SB-028/24.04.01
Technical Support, Europe & Africa

                                                   NHM-5


AUTO TURN OFF

               Some transceivers are observed to suffer from intermittent 'Auto turn off'.
               Symptoms of this can be following:

               Phone switches off by itself
               - Even with 3 or 4 battery bars and after turn on again it is possible to make
                 a call for a longer period
               - Typically it fails repeatedly with intervals of anything from minutes to one
                 or two days
               - This should not be mixed up with the normal Battery Low turn off

               The following component should be changed in phones suffering from that
               'Auto turn off' symptom:

                         ITEM    CODE         DESCRIPTION
               DEL       R301    1620105      RES NETWORK 0W06 2X2K2 J 0404
               ADD       R301    1620017      RES NETWORK 0W06 2X100R J 0404

               Above mentioned change has been done in production since following
               HWIDs:

               MODULE                                HWID
               UP4IV (0201741)                       0813
               UD4 (0201476)                         0814
               UG4 (0201677)                         0815

               Above mentioned component change is primary correction. As secondary
               correction it can be checked, which Flash IC has been used.

               In few cases the 'Auto turn off' symptom can be caused also by old ST flash
               i.e. from before week 05/2001, and therefore it is recommended that only
               ST flashes from week 05/2001 or later are used. INTEL flashes can be also
               used, as those are not seen to cause any that kind of symptoms.

               Instructions how to check the weekcode from ST flash can be found in
               APPENDIX I.




NHM-5 SB-028
                                                  CONFIDENTIAL                    2 (2)




      APPENDIX I

               For 0.25

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