This type of failure should be taken to regular inspection, see if the main belt appliance and transfer belt appliance are obviously damaged, such as electroacosia, the plastic breakdown, etc., there is also a photosensitive drum to rotate, how is the brightness of the scanning light. At the same time, we must ask the operator's toner model to add a carrier, and so on. After the above factors are excluded, you should do the following: Open the front cover, turn the door switch with the switch plate, so that the copier is in normal power-on state. Put the original on the glass plate, turn it on, when the paper is delivered to the photosensitive drum, turn off the machine, remove the drum, check if there is an image on the drum, if there is an image, explain the problem in the transfer section, such as No image, illustrates the problem in the main belt appliance portion and the developing portion. There is a corresponding check processing method for the failure of the transfer section and the main belt appliance portion, which is no longer awkward. The developing portion has failed, mainly two reasons: (1) The developing roller drive clutch failure, the developing roller cannot rotate, or may be due to improper adjustment, causing the gap between the scraper and the developing roller, causing the clutch unable to exploit the development Roller rotates. (2) For some models, such as NP-270, the developer is pressed against the locking rod (maintaining a gap), because the operator rotates the locking rod, the action is overflow, resulting in The locking rod is distorted, and it cannot lock the developer. The gap between the developing roller and the photosensitive drum is too large, and the toner cannot be adsorbed to the photosensitive drum, and there is a blank copy. The above is only two cases in the copier failure. In fact, the fault of the copier has a variety of faults, and some faults are determined according to the self-diagnosis function of the copier itself. Some faults must be observed and analyzed before it can be determined. In the face of a faultful copier, how can I make the correct diagnosis and fix it as soon as possible? The following practices are appropriate. 1. Ask: After the interrogation of the operator machine, others have been caught, which are not moving, according to the operator's tips, carefully check these parts, there is no misundry. 2. Follow the principle that is easy and difficult: First exclude more obvious, more common factors, do not blindly dismantle, according to the theory and experience, carefully observe, carefully analyze, go to falsifying, and finally determine the source of the fault. 3, the parts that are removed should be properly placed to prevent themselves or others damage the parts in a busy. In a sense, this also reflects the quality of a maintenance personnel. 4. For bandaginal components, it is necessary to check whether a small metal such as a head, a track needle is taken before reinstalling. Due to the case of entering foreign matter, it is uncommon. 5. For models that have never been touched, you must read random data before you do it, although most copier structural structures are similar, but the models are different. For repairs with large demolition, if there is no detailed information, it is best to draw a local mash, or make a simple sign on the component to prevent misunderstandings. To become an excellent maintenance person, the key is to have the ability to diagnose faults. To have this ability, there must be certain theory and experience, diligent study, and practice in a hurry.
