Analysis of maintenance: Open the front cover and found a short cut recording paper only, not completely cut off the hand push forward the cutter (stainless steel discs) cutting along the original direction until the end of the recording paper cut, installed records paper, cover the front cover, when copying the fault persists. Remove the cutter assembly, found that as the blade is too thin, there was a certain twist the knife. On plates straighten the blade and blade grinding oil stone (including movable and fixed knives), making it sharp, then wipe clean the cutter assembly with a soft cloth, and put on the test machine, copying normal troubleshooting.Jktservice manual download site