J2108B Machine Feeder's automatic lift system failed, causing the paper table to not rise automatically, and Feida could not properly feed the paper.
After a series of inspections, it was found that there was a problem with the paper-lift electromagnet. Use a multimeter to measure the solenoid coil and the multimeter is in an open circuit condition. Therefore, it was suspected that the coil was burned out. However, with the horn touch coil, it does not feel hot, and there is no burning smell. So, is there any problem with the core of the coil? As a result, the outer insulation layer of the wire was stripped and the copper wire was exposed, and the copper wire in the coil was found to be broken at the solder joint. Analysis of the reasons can be due to the fact that the copper wire was not firmly welded at the joints, and the magnets were continuously sucked and released, and finally the small copper wire was shaken off.
To eliminate this fault, simply reconnect the copper wire to the joint. Then, piling up a little solder on the surface, reapply a few layers of insulating tape, and the paper-lifting electromagnet can be reused.
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