In the cannon laser jet SX series printers released as HP Laser Jet II, and other brands as well, there is a solenoid device which releases a clutch which then allows the paper pickup rollers to move paper through the printer. These devices have a felt pad between the armature and the pole piece which I once thought was only to keep down noise. Then one day I begin to see a lot of sticking solenoids and investigated the failure. The felt pad along with the glue that held them in place had changed to a mushy substance that was not releasing the armature and so it would continue to feed paper after all the printing was done. I said to my self, "Well I will just scrub that stuff away and let it make a little noise, so what". Well it turned out that with out the non magnetic material in between the armature and the pole piece the residual magnetism would not release the armature either. So I glued a little piece of thin plastic in place and all was well. It was a little noisier that the felt pad but not bad.
John, WA5BXO ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
