LA400/LA450/LA700 Black Ribbons Usage

This document clarifies the interchangeability and correct usage of two black ribbon cartridges (LA40R-KA and 3X-LA70R-KL) for Compaq LA400, LA450, and LA700 printers. While both ribbons physically fit, their usage depends on whether the printer is equipped with a color mechanism.

Key guidance includes: - LA400/LA450: Must use LA40R-KA if no color mechanism is installed. If a color mechanism is installed, the 3X-LA70R-KL is recommended for its longer life, though both are compatible. - LA700: Ships standard with a color mechanism; 3X-LA70R-KL is recommended for best performance. - Color Printing: The LA40R-KC color ribbon is only compatible if a color mechanism is installed.