Question about Bernina Sewing Machines
Typically, ther are two problems with locked up Bernina 730's:
1. Look for a split in the worm gear on the cam stack...(white Delrin systhetic gear attached to the steel cams.
2. Look for a crack in the vertical shaft gear...(Delrin synthetic gear as well)
These gears have given great performance for over 40 years and may need to be replaced...
Posted on Sep 06, 2009
By 'locking-up' do you mean a mechanical problem where the mechanism wont move, or is the machine just stopping any response to trying to change things on the touch-screen ? If the latter I would advise you try leaving the machine on overnight, without using it and see if it works OK the following day. If it does, turn it off, leave it off for a few days and re-try ... if the problem returns and responds similarly to leaving it on for a while, I have found that this can be an indicator of a potential impending problem with the main processor board ('S'-print). If your machine is still under warranty, I would ensure that the problem is demonstrated to a competent Bernina service agent who should change the 'S'-print, otherwise, if it finally fails (symptoms being that the screen will fail to have anything on it, but the backlight is on and the sewing light is off), you will end-up with an expensive replacement of the board.
Posted on Oct 17, 2011
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Posted on Jan 02, 2017
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