Service Manuals, User Guides, Schematic Diagrams or docs for : NOKIA Mobile Phone Nokia_8850 NSM2-020

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>> Download NSM2-020 documenatation <<

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                                                    CONFIDENTIAL                     1 (3)




Nokia Mobile Phones                                 Service Bulletin No. SB-020/16.03.00
Technical Support, Europe & Africa

                                                    NSM-2


RTC-BATTERY MODIFICATION

               If there are complaints that date and time have to be set again after removing
               the battery for a short period of time and RTC-battery is properly in its place,
               it is possible that spring contacts does not work in exactly right way. In this
               cases please follow the procedure described on page 2 and 3, also when
               replacing RTC-battery with a new one.




NSM-2 SB-020
                                             CONFIDENTIAL                       2 (3)




Plus (short) Spring Bending


                                                    Using tweezers take a grip of
                                                    short spring.

                                                    During all following operations
                                                    (also Minus spring bending)
                                                    use your thump to push backup
                                                    battery cell toward the keymat
                                                    to prevent it get loose.




                                                    Bend spring upwards.

                                                    Make sure bending will
                                                    happen at the area which
                                                    has the original bending.




                                   Angle between bent spring and
                                   keymat backside is approximately
                                   45 degrees.
                              45




NSM-2 SB-020
                              CONFIDENTIAL                 3 (3)




Minus (long) Spring Bending


                                 Take a grip of long spring
                                 with tweezers.
                                 Parallel to keymat side pull
                                 spring toward the backup
                                 battery cell.

                                 While pulling use linear motion.

                                 Supporting tweezers to keymat
                                 and using rolling motion is
                                 forbidden!




                                 As a end result long spring
                                 contact point will be at the
                                 same line (normal to keymat
                                 centerline) as previously bent
                                 short spring (A).

                                 Contact point shall be
                                 at the same height from
                                 keymat backside as the short
                                 spring contact point (B).




                    A                              B




NSM-2 SB-020

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