Toner cartridge is a printer consumable, it is consumable, just like we use fountain pens, the nib and ink are consumable. As an important consumable in a printer, it determines the output quality and the number of prints. Therefore, users need to understand the basics of toner cartridges and master how to purchase and replacement techniques.
When do you need to replace the printer toner cartridge? I think most people will use the output paper when there is no word, which proves that the toner cartridge inside the toner cartridge is exhausted. Although this is a very intuitive way to identify, but wait until it is exhausted and then replaced, not only affect the life of the printer, but also affect the work progress.
When do I need to replace the toner cartridge? Generally speaking, the following are the main situations when the toner cartridge needs to be replaced:

1. Printed text or images appear unclear or gray background and other quality problems.

2. The printer indicates an error message that the toner cartridge or related parts need to be replaced.

3. the toner cartridge has reached the recommended replacement time or number of prints.
The first situation is very good to understand and distinguish, we compare the toner cartridge to a pen capsule, the inside of the toner cartridge is equipped with black toner, which we compare to pen water. When the print out of the paper on the text has a deep and light, and some places are not clear, and even the paper appeared on the gray background, this time you will take the toner cartridge out of the shake a few times, and then put it back into the printer, the print quality is better than before. At this point you have to consider replacing the toner cartridge.
The second situation is determined by the indicator light on top of the printer and the printer driver prompts on your computer. Printers have consumable indicator lights, if once the light has a color change, it is a signal to replace the toner cartridge. By the same token, the printer driver on the computer will monitor the amount of consumables, once the balance is insufficient, it will pop up to prompt the replacement.
The third situation can be based on the number of pages printed on the toner cartridge parameters to determine. Toner cartridges are labeled above the number of pages that can be printed, according to the amount of paper used to determine the estimated replacement time. There is a chip counter on the top of the toner cartridge that is designed to count the number of prints. Users can be based on the last time to replace the toner cartridge time, estimate how long it can be used and print a few packs of paper, so as to determine the approximate replacement time.