Laser Printer Fuser And Thermistor Sensor : How The Condition Of These Components Affects Print Quality
Lexmark laser printers for commercial use comes with a fuser assembly that is designed as a modular unit which can be replaced as a complete sub-assembly. Said component has a hot upper roller made of aluminum and is coated with Teflon (coating of most frying pans). The Halogen lamp heater is built into the core and comes either in metallic gray or green. The lower pressure roller counterpart is made of silicon based rubber and usually marketed as orange colored. The Thermistor is likewise mounted on the hot fuser roller to precisely monitor the fuser temperature. Heat could damage the silicon rubber pressure rollers which eventually become soft. The Teflon coating of the hot rollers could wear-off and the Halogen lamp may burnout. A dirty Thermister coated with baked-on toner could also cause the fuser assembly to overheat.
However, aside from a well-oiled printer, the final gauge of a laser printer’s capability is still the quality of its printouts which could only be delivered by a specified toner formulation. Quality toner can only come from an OEM toner cartridge or a toner refill kit compatible to the Lexmark printer. In the case of Lexmark compatibles, LTS’ refill package come 80% cheaper. The toner refill kit for the LEXMARK C500 printer is only $25.95 against the OEM at $140. Both toner products deliver similar print quality and yield of 5,000 pages at 5% coverage.
Always keep the Thermistor clean to experience quality printouts and extend the effective lifecycle of your Lexmark laser printer.