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Bernina 1130 power supply

Our Bernina 1130 stopped working from one second to another. Fuses are all ok, voltages at the transformer's secondary windings seem to be present. The machine is dead, even the little work lights are not working, so I assume a problem on the power supply board. I am an electronic engineer, but without schematics I can't even check voltages. Does anybody know where to get schematics or at least know voltage test points on the power supply pcb?

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Posted on Jan 02, 2017

RickE1
  • 202 Answers

SOURCE: My wife has a Bernina

Possibly a fuse blew. To get to the fuse is a bit of a job as you will have to remove the handwheel, handwheel side cover and back cover to see it. The screws you can see are self evident though there are screws etc. under the cover in the center of the handwheel and holding the covers benieth the machine. When you do have the covers removed be sure you have grounded yourself so as not to send a static charge through the circuitboard while checking out the fuse. The side handwheel cover needs to come off before the back cover.

Posted on Jan 08, 2009

RickE1
  • 202 Answers

SOURCE: Bernina 180 sewing machine 'died'. Was sewing -

Hi, sorry to say but very rarely is it the fuse when this happens. You can unscrew the one screw on the ouside and pop the cover open. (carefull as there are wires attached and make sure you are grounded or have discharged any static from yourself).
The fuse will be self-evident but I suspect you will need a visit to your Bernina dealership for a new circuitboard.
Rick
Certified Bernina tech

Posted on Dec 07, 2009

  • 89 Answers

SOURCE: My Pfaff 1471 lights up,

Were the base plate pugs into the power leads, you should read about 6-18 is ohms. Open and short is a bad transformer.

Also there are fuses, 2-3 right next to the transformer, small blueish and round are the shapes. They go bad often.

Posted on Nov 25, 2011

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