Overheat Protection - Ricoh B264 Service Manual

IMAGE FUSING AND PAPER EXIT

6.15.12 OVERHEAT PROTECTION

If the hot roller temperature becomes greater than 250°C, the CPU cuts off the
power to the fusing lamp, and SC543 (Fusing Overheat Error) will be displayed.
Even if the thermistor overheat protection fails, there is a thermostat in series with
the common ground line of the fusing lamp. If the temperature of the thermostat
reaches 199°C, the thermostat opens, removing power from the fusing lamp. At the
same time, the copier stops operating. At this time, SC542 (Fusing Temperature
Warm-up Error) will be displayed.
SM 6-103 B264/B265