[amayausers.com] Re: false bobbin breaks (Amaya XT)
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- Date: Thu, 9 Jul 2009 15:38:29 UT
This message was posted by Rod or Sharon on AmayaUsers.com. PLEASE DO NOT REPLY
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Dee,
It sounds as if you do have a thread break sensor that is not working properly.
Here are a couple of items to check. Remove the needle case cover. On the front
face of the needlecase and toward the left side, you will see a small PC
electronic board. There are two very small wires soldered to this board. Check
them carefully to see if one or both of the solder joints have failed. if they
have failed..the thread break sensor needs replaced.
If the solder joints are ok.....you will also see where a cable is plugged into
the PC board. Make sure this is secure, unplug it and plug it back in a couple
of times. Sometimes a slight bit of corrosion can affect one of the plug-in
pins and cause it to not allow proper signal transmission to take place.
THE NEXT ITEM TO CHECK WILL BE DONE AT YOUR OWN RISK.
The same cable that attaches to the little PC board you just excersied by
plugging and unplugging, also is plugged into the Main PC or Motherboard. It
should also , for trouble shooting purposes, be plugged and unplugged a couple
of times. Do not pull on the wires, work the connector carefully to unplug it
and be careful not to bend the pins when pluging them back in.
TURN OFF THE MACHINE. BECAREFUL OF ANY STATIC DISCHARGE THAT YOU COULD IMPART
TO ANY OF THESE PC BOARDS. A static spark can damage sensitive elements in
these systems.
The cable that is plugged into the little PC board should be labled as a J79
cable. On the Main board a connector will also be labled J79 where it plugs
into. It is located on the right side and towards the front of the board. Find
it and unplug and plug it a couple of times to exersise the connecting pins.
As I said, you proceed into this area with caution and at your own risk.
Mistakes here can be costly, not so much with physical harm, but by damage to
equipment if not done properly....TECHS use a grounding wrist strap to insure
no static sparks occur while working around the PC boards.
Tackle these one at a time as a process of elimination.....
If none of these suggestions bring the thread break sensor back to life, a
replacement and/or tech call is in order which of the latter, may be something
to consider as this should fall into the warranty catagory, i.e...if your
machine is still under warranty......
Rod Springer
Amaya Tech & Trainer
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