Canon PC800 Series Service Handbook page 39

g. Points to Note When Mounting the Fuse
When mounting the thermal fuse of the No. 1 mirror mount, be sure that the fuse is oriented as
shown.
Make sure that the fuse is in contact with the reflecting plate.
(front)
Figure 2-43
CHAPTER 2 STANDARDS AND ADJUSTMENTS
Reflecting plate
Thermal fuse
2-25