Print Unable 78 – Fuser Error on the Brother 8480, 8890, 8080, and 8085

Diagnostic Aids for the Print Unable 78 Error Message on the Brother 8480, 8890, 8080, 8085 Machines The Print Unable Message appears on these Brother machines when the center thermistor inside the fusing assembly reads a rapid decline in the fuser temperature. Most times on these machines it is due to the result of a sudden power [...]