Canon PC920 - Page 173

CHAPTER 6 FIXING SYSTEM
COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-9
b. Thermal Fuse (FU2)
If the temperature around the thermal fuse exceeds 228°C and remains so for a specific period
of time, the thermal fuse will blow to cut the power to the fixing heater.