3 fusing jam : When the fuser roller separation claws extended use , the tip blunt or small spring after fatigue failure will cause paper jams. For some models, the paper feed roller mouth severe wear after prolonged use , will frequently jams. As the fuser roller jam caused severe fouling , models are common in the general case .

 

Because the paper path sensor failure or other circuit failure caused a paper jam , belonging to another class of problems , you should control maintenance manual , with the instrument , do the appropriate checks.

 

Copy product has no image

 

Such failure occurs , you should first make routine checks to see Lord with electrical appliances and the transfer belt is obvious damage, such as the corona wire Bengduan , plastic parts breakdown , as well as the drum is rotating , scanning lamp brightness how . Meanwhile , also inquires the human operator model with the toner , so the time to add the carrier . Excluding the above factors , it should do the following: Open the front cover , switch plate to the door switch is turned on , so that the equipment is properly energized . Place the originals on the glass , start walking papers, when the paper fed to the bottom of the drum , turn off the machine , remove the drum , to check whether there is an image on the drum , if any image , indicating that the problem lies in the transfer section , such as no picture , explain the problem and developing parts of the electrical part of the main belt .

 

Failure on the part of the transfer belt and the main electrical parts , there is a corresponding set of check processing methods , not repeat them here . Developing part failure, mainly for two reasons : ( 1 ) developing roller drive clutch failure , the developing roller can not rotate , it may be due to improper adjustment , resulting in a gap between the blade and the developer roller is too small , causing the clutch can not be driven by developing roller. ( 2 ) copiers for some models , such as the np-270, developed by the locking lever is pressed against the sensitive ( to maintain a certain gap ) on drums , as the operator rotating the locking lever , the action too much too fast , resulting in distortion of the lock lever , the developer can not lock , the photosensitive drum and the developing roller gap is too large , the toner on the photosensitive drum can not skip , it appears blank copy .

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