To determine whether the printer uses an original chip or a serial number chip, you can start from the following aspects:

1. Appearance:

• Printing font: The font of the original chip is usually clear and regular, with moderate color depth and is not easy to erase; if the serial number chip is produced by a third party, its font may be relatively fuzzy, irregular, or even have obvious signs of modification.

• Chip surface: The surface of the original chip is smooth and has no polishing marks; some non-original serial number chips may be polished to cover up the use marks or improve the appearance quality, resulting in wear or unevenness on the surface.

• Chip pins: The pins of the original chip are bright and regular, without obvious oxidation or scratches; if the serial number chip is a product of poor quality, the pins may have scratches, oxidation or bends.

• Chip thickness and edges: The original chip has strict standards for thickness and edges, and the overall appearance is regular; the thickness and edges of non-original serial number chips may vary, and there may even be obvious signs of modification.

2. Packaging and labeling:

• Outer packaging: Original chips usually come with complete outer packaging, including shockproof materials, labels, and instructions, etc.; while the outer packaging of some third-party serial number chips may be simple or lack some accessories.

• Labeling information: The packaging of original chips will have clear brand logos, models, production dates, and other information, and the labels are clear and standardized; if the serial number chip is from an irregular source, the label on its packaging may be unclear or inconsistent with the genuine product.

3. Performance:

• Print quality: Printers with original chips installed usually have stable print quality, accurate colors, clear images, and print speeds that are in line with the normal level of the printer; if an irregular serial number chip is used, problems such as print color deviation, blurred handwriting, and slow print speed may occur.

• Compatibility: Original chips have the best adaptability and compatibility with printers, which can ensure the normal operation of the printer; and some serial number chips may have problems in communication and interaction with the printer, such as the printer cannot correctly identify consumables, frequent errors, etc.

4. Query and Verification:

• Official channel query: Some printer manufacturers provide official query systems or customer service hotlines. You can verify whether it is an original product by entering the serial number of the printer or chip and other information. If the query result shows that the chip is original, then it can be determined to be an original chip; if no relevant information can be found or it is displayed as non-original, it may be a serial number chip or a counterfeit original chip.

• Printer internal information: Some printers have the function of recording chip information. You can view chip related information such as chip model and version in the printer's settings menu or system information. Compare it with the original chip information provided by the printer manufacturer. If it matches, it may be an original chip, otherwise it may be a serial number chip or other non-original chip.