First, the use time of the printer can be seen from the color. From the appearance, the printer with newer color will not be used for a long time, indicating that the original owner is also very caring and generally there will be no major problems; On the other hand, if the color is old and worn, it means that it has been used for a long time and there may be various problems when it is bought back.

Second, test the printing effect and test the printing yourself. If there is a paper jam and the font is not clear, you can't take it.

Third, pay attention to the consumables used by the printer. Some printers are very cheap, but the consumables are more expensive than the fuselage. If you buy such a printer, you should consider whether you can afford consumables.

Extended data:

Precautions for printer use:

1. If the printer has fever, smoke, peculiar smell and abnormal sound, please cut off the power immediately and contact the maintenance personnel.

2. It is forbidden to place other items on the printer. Please unplug the printer from the power outlet when it is not used for a long time.

In case of thunder nearby, unplug the power plug from the socket. If the power supply is plugged in, the machine may be damaged.

4. Printing is prohibited when printing paper and ribbon box are not set. The print head and print roller will be damaged.

5. The temperature of the print head is very high. Don't touch it until the temperature drops. Prevent burns and injuries.

6. Do not touch the metal parts of the print cable connector and the print head. Do not touch the print head while it is working.

7. When the printer is working, it is forbidden to cut off the power supply.

8. Do not disassemble, move or drag at will. If there is any trouble, please contact the information officer.

9. Foreign objects (staples, metal sheets, liquids, etc.). ) Do not enter the machine, otherwise it will cause electric shock or machine failure.

10, the printer can only be turned on when the power supply is normal and the data cable is connected to the computer.

1 1. Please do not move, drag or turn off the printer when printing.

12. When the printing quantity is too large, control the printing quantity within 30 copies and let the printer rest for 5- 10 minutes to avoid overheating and damage to the printer.

13. When printing documents, it is not allowed to use paper with too high thickness (above 80g) or wrinkled and folded paper.

14. If the printer is damaged due to serious physical damage, man-made damage or non-compliance with the above operating specifications, the relevant responsible person will be investigated.

References:

Baidu encyclopedia-printer