Lexmark 78C1XYE Yellow Toner Cartridge 5000 Pages

Genuine Yellow Toner for Lexmark Colour Printers

This cartridge is a Lexmark Unison original toner in yellow, rated for an extra-high yield of 5000 pages. It is designed for colour laser printers including the CX622ade, CX625ade, CS421dn, CS521dn, CX625adhe, CX522ade, CS622de and CX421adn. The single-pack format supplies one cartridge per order. Buyers with monochrome-only devices or models outside this compatibility list cannot use this toner.

Installation and Common Issues

The cartridge slots into the printer’s front-access toner bay and clicks into place without tools. A frequent issue occurs when the protective sealing tape is not fully removed before insertion, which causes blank or streaked yellow output. Another common problem is installing the cartridge into an incompatible model from the similar CX or CS series, which the printer will reject with a supply error.

Yield and Interface Constraints

The 5000-page yield follows standard coverage metrics and will decrease with graphics-heavy documents or frequent short print runs. The toner uses a proprietary mechanical and electronic interface that only works with the listed Lexmark engines; it cannot be refilled by third-party kits without triggering a supply-memory error. Colour laser printing also requires all four cartridges to be present, so a depleted cyan, magenta or black unit will halt yellow output even if this cartridge remains full.