Important Purchase Policy NO RETURNS ALLOWED for this product.NO WARRANTY is provided.All sales are final. Not sure what a part is called? Need the ET-8550 parts list? Want to learn how to work on it? Check out our ET-8550 Exploded Parts Diagram & Repair Reference Guide: https://bchtechnologies.com/products/et-8550-et8550-exploded-parts-diagram-repair-reference-guide-annotated-edition Please read the entire product description before placing your order. This is a specialty printhead intended for experienced users who understand printer repair, DTF ink systems, printhead installation, and the risks involved with replacing a printhead. By purchasing this product, you confirm that you understand and accept the following: This product is sold as-is. No return, refund, exchange, or warranty is offered. We are not responsible for damage caused by improper installation, clogged ink systems, bad cables, mainboard problems, blown fuses, driver IC failure, incorrect priming, bad ink, poor maintenance, or printer-related electrical issues. If your order violates the terms of this listing, we reserve the right to cancel the order and block future purchases. No Phone Support for This Product We do not offer phone calls to discuss this product before purchase. This item is intended for customers who are confident in their diagnosis, installation ability, and compatibility requirements. Please purchase only if you are sure this is the correct printhead for your application. About This Printhead This listing is for a NOT-converted Epson ET-8550 printhead. This printhead has not been nipple-converted. It is being sold as an ET-8550 printhead for customers who need the non-converted version. Because printhead installation depends heavily on the condition of the printer, ink system, cables, and mainboard, proper diagnosis is required before installation. A new printhead will not fix an underlying printer problem by itself. Before Installing the Printhead If your printer previously burned a printhead, do not simply install this new printhead and expect the problem to be solved. If the underlying issue is still present, the printer may burn the replacement printhead as well. Before installation, check the following: Mainboard fuse condition Printhead cable condition Driver IC chip condition Ink system condition Dampers Tubes Ink tanks Capping station Waste line Pump function Cable orientation and connection A burned printhead is often a symptom of another problem, not the only problem. Priming Requirement All printheads are filled with shipping fluid and must be properly primed before use. You may use an ink charge or perform a “park and prime” procedure: Turn the printer on. Allow the printhead to park naturally on the capping station. Connect a syringe to the waste tube. Slowly draw ink through the waste line. Once ink flows steadily into the syringe, stop. Run the printer’s built-in regular cleaning function. Do not run repeated strong cleanings back-to-back. Give the printer time to rest between cleaning cycles. Blank Printing After Installation If ink comes out of the waste tube during cleaning, but the printer still prints completely blank, the printhead is likely not clogged. In that case, check the printer’s electronics, especially: Mainboard fuse Driver IC chip Printhead cable Cable seating Mainboard damage A blank print after successful ink flow can indicate an electrical or signal issue, not a printhead clog. Clean the Ink System Before Installation If your previous printhead was inactive for a period of time, especially in a DTF printer using white ink, the ink system may already be clogged. Before installing the new printhead, thoroughly clean or replace: Ink tanks Ink tubes Dampers Capping station Waste line Pump line Any white ink pathway White ink can separate, settle, thicken, and form gel-like clumps inside the tubes and dampers. These clogs can block ink flow and quickly damage or starve a new printhead. Many printhead failures happen because the old ink system was not cleaned before the replacement printhead was installed. If dried or gelled ink remains in the system, the new printhead may fail shortly after installation. Kevin’s Recommendation To extend the life of your new printhead, maintain your printer regularly. Research proper maintenance procedures and consider using an automatic maintenance script or maintenance routine if your setup supports it. For DTF printers, white ink maintenance is especially important. Shake or circulate white ink as needed, prevent ink from sitting too long, and keep the capping station and waste system clear. Final Notice This product is for experienced users only. By purchasing this printhead, you agree that: NO RETURNS are accepted.NO WARRANTY is provided.NO REFUNDS or EXCHANGES will be issued.Installation risk is the buyer’s responsibility.
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