Description: In print entered please turn off the power of the printer, or it will cause the mainboard chip burned. After loading the print head, please don't install ribbon overhead 10 pieces of A4 document, so that make the new needle have a running-in process, and then put the ribbon. If the original print head was broken and especially leaked ink, the mainboard has burned possibly , so please troubleshoot the problem of the mainboard before replacing the print head. In addition, the F1,F2 fuze wire of mainboard can only be replaced by the original fuze that has same current value and same model. if replacing fuze that is biger current value and different model, Both printhead and mainboard are possible to be broken Print head requires lots of attention, It is easy to cause man-made damage if a non-professionals replace printhead blindly. Specification: Item Type:Printhead Color:As pictures shown Suit for: L300 L375 L358 L365 L550 L551 L350 L353 L360 L381 L385 XP300 XP400 XP415 PX405 PX435 L301L303 L351 L353 L551/310 L358 ME303 Package Includes: 1pc*Printhead Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.