Oce 3121 Technical & Service Manual page 564

Protection against excess temperature of the fuser
Themistor TH2 monitors the rear end of the fusing film. This is to prevent an
excessive temperature occurring, as this could damage the fusing film: partic-
ularly when processing size B4 or smaller.
When the output of TH2 exceeds 250°C. The sheet-to-sheet distance is in-
creased, to accelerate the heat discharge of the heater. The copying run, with
the increased sheet-to-sheet distance, is continued even though the output of
TH2 falls below 250°C.
If the overheating persists, after increasing the sheet-to-sheet distance, and the
temperature rises above 260°C, the copying run will be interrupted. The copier
will switch OFF. E001 will be logged in the fault logging.
ed.1 17 Fusing 507