Many products have graphic characters including LOGO on the back of the fuselage. This type of text is usually printed on it with special technology, so it is not one with the back. After using the product, the surface of these pictures and graphics will show different degrees of wear and tear. The most typical one is that the color will be darkened, or it will be different from other products of the same type. In the renovation process, because of the replacement of the grinding tools, many black heart merchants have adopted the polishing method. As a result, many of the worn logos appear to have a relatively uncoordinated sheen on the surface.
The interface part we usually mainly see the application of more USB interface and headphone jack. The TF extension interface and HDMI interface are less frequently used and less sensitive. With the user's need for more interface definition, including fingerprint identification,NFC,RFD and other functions.
First we'll look at the edge of the headset and the USB port. These two interfaces have high insertion frequency, so the edge of the interface can easily leave the marks of wear. Especially the USB interface, because the interface is sharp and sharp, so the refurbished product will have obvious processing marks. Also, the inner metal parts of the two interfaces can be observed with the eyes. Because of the refurbishment of these products, the metal parts will be weakened due to wear, and the slight discoloration will be easily observed.
The shell screw
Early tablet products were not designed with a free screw design. Even today, many small brands still use this old-fashioned look because of cost considerations. And the product of this design, we can check the condition of the screw to carry on the product old and new judgment. Because the surface of the screw will use some anti-rust treatment. The used product's rust protection layer will be damaged by all kinds of damage. In particular, some of the black shell products, the screws are also treated with the black, even if not removed, there will be some traces left.
The shell edge
In addition to some low - cost products, many of the product's housing shards are designed without screws. In the process of repairing the shell, it is necessary to use tools to move the joints. So there may be some obvious signs of a refurbished product. In addition, many tablets are made of plastic, even if they are not repaired. This kind of shell technology is not very mature, so the use of products more or less will appear some "warping" situation. This is due to the hot nature of android. In addition, I would like to remind you that some scratches may appear on the edge of the product, but they do not represent the product being refurbished. Since the products are mass production lines, some tools will be used to arrange and fix the products in the process of batch placement. Some scratches are created during placement and fixation. So, we compared to pay attention to pry marks and scratches, by contrast with two of the same machine, if more than two machines all have the same Nick, that means the scratch is derived from the production of this machine, the opposite to refurbish.
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