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1. Replace the hp ink cartridges must be in accordance with the steps in the operating manual, with particular attention to the power to open the state to operate. Because the ink cartridge is reused after the cartridge is replaced again, the printer will not be able to detect the ink cartridge in the shutdown state, so that the printer can not detect the ink cartridge on the reinstallation. In addition, some printers measure the ink capacity using the electronic counter inside the printer to count (especially in the use of color ink on the statistics), when the counter reaches a pre-set value, the printer to determine the ink has been used To do so. In the process of cartridge replacement, the printer will reset the internal electronic counter to confirm that a new cartridge is installed. In particular, to prevent the replacement of the old ink cartridges in the off state, replace the new cartridge. This operation is not valid for the printer.
2. When inserting and removing the printer power cord and printing cable, be sure to turn off the printer.
3. hp 201x toner cartridge should be used at room temperature during long periods of inactivity and avoid direct sunlight.
4. Before turning off, let the print head return to the initial position (the printer is in the paused state, the print head automatically returns to the initial position). Some printers must automatically move the print head to the initial position before turning off. Some printers must be in a paused state before the shutdown (that is, the pause or PAUSE lights) before turning off. This is to avoid the next time the printer to re-clean the print head operation to waste ink; the second is because the print head in the initial position can be sealed by the protective cover.
5. Part of the printer is in the initial position is in a mechanical lock state. If you move the printhead by hand at this time, you can not leave the initial position. Be careful not to force the printing cart, otherwise it will cause damage to the mechanical part of the printer. In the initial position when the print head is locked, then do not manually move the print head to replace the cartridge, so as to avoid failure. This article come from: https://v4toner.wordpress.com/2017/09/29/how-to-replace-the-ink-cartridges
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