Often the most clumsy method, but unintended。
In the maintenance process, the exclusion is one of those things that doesn't work。
What are the circumstances under which the exclusion is used? When our spare parts are limited, even without them, they cannot be located at once to the failure itself, at which point they can be further reduced by the application of the exclusion method。
Let us give a few examples of how the exclusion is used。
Example one, colour laser, one color problem。
The colour laser has four selenium drums, one of which is problematic, and it is difficult to judge whether it is a problem of the colour or a problem of contact at the point where it is. What do we do when there's no replacement of the selenium drum on hand
This is when we use exclusion。
First, we know that the four selenium drums of laser printers are the same, but they're not the same chips, and we have a problem with which color chip we switch with another normal selenium chip, and then we put the americium drums in the same position, and then we test them。
And then it comes out, like black positions, red positions, black positions. If the normal black selenium drums are placed in the red position, which is abnormal, it means that there is a problem in this position, and if there is an anomaly in the black position, it is the selenium drum itself. Isn't it eccentric..
Example two, photocopies are not working well。
The client said the photocopying was not working well and the color was low。
At this point, the client can be advised to try printing to see if the printing is normal. Why
Because copying is a more scanned unit than printing. The print is the computer that sends the data directly to the machine, and the copy is the data scanned from the scanning unit to the machine。
If the print works properly, can you judge the problem in the scanning unit? For example, reflecting lenses are dirty, scan lights are dirty, ageing, etc。
If printing is also light, can it focus on their common parts, such as lasers, selenium drums, graphics, reprints, high-pressure plates, ink powder? Generally clean lasers, change carriers, drum cores, ink powder, this is an operation。
Example three, cardboard
The client said that the copy machine was carded more frequently and was unclear。
There may be many people who encounter cardboard, and the first thing that comes to mind is paper grinding wheels, and, yes, paper grinding wheels are old, they can't rub paper, and they don't have paper in place, and indeed they are one of the reasons for the cardboard. So is there any way to judge if it's a paper-sweeping component
We use exclusion。
We all know that printers and photocopiers have two base paper boxes, one master paper box and one hand delivery. It's time we put it in paper. If the hand-in-hand paper is normal and uncalculated, can it be explained that there is a problem from the box to the point where the hand-in-hand piece is unserviceable, with the probability that the wheel will be swung or that the path will be taken。
If the hand-in-hand paper is stuck, then the box is excluded and the focus is on two parts of paper for public use, from the opposite to the fixed, which in practice results in more cardboard。
These examples are only common in the maintenance process and are frequently used, and there are many other cases, combined with the cardboard method that was said the day before yesterday, which can be used in conjunction with many surprises。
