In addition to cleaning the nozzle, cleaning the front filter filter, but should learn to proceed from the circuit part of the initial diagnosis and testing, to avoid typing or calibration problems because of the circuit caused by unclear typing, scattered or ink line is not Stable problem. Details of the circuit part, including charge calibration calibration, pressure calibration, high voltage measurement, ground detection, etc., this time we need a multimeter to assist work, the use of multimeter and operating learning is also essential, want to be a Pen Maji maintenance experts, we must understand the part of the circuit knowledge, starting from the circuit ink step by step, is our faster and more stable solution to the problem. In addition, Pen Maji have to do a regular maintenance work, this is the majority of operators or users of the jet printer a blind spot, a user from the cost considerations, said without maintenance and cleaning can save some costs, Everyone knows that such neglect, not only the higher loss of late maintenance costs, while the loss is the life of Pen Maji will lead to the loss of value of the equipment earlier. Regular maintenance, not only to avoid some unnecessary fault development, but also allows us to always maintain the best printing quality, good working condition, will let us do more with less.