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K-S2 Aperture block failure repaired Locked

Started Nov 6, 2017 | Discussions thread
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Zshuterbug Forum Member • Posts: 53
Re: K-S2 Aperture block failure repaired

Reading the Pentax Forums site in detail, it appears that the analysis eventually leads to a buildup of residual magnetism causing additional friction in the armature. Opening up additional gaps on either the ends or the sides of the armature breaks up the loop and restores proper operation.This may be supported by the reports that AA fresh batteries with possibly more available power can temporarily restore operation (until the magnetism builds up even more).

Heck, from watching the video, maybe even using the metal file across the ends demagnetizes the coil partially. Now if anyone documents before and after the magnetic field of the armature we may have a data driven answer.

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