Ricoh B246 SERIES, Manual, Page: 243 / 268

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Temperature Control Components
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Three fusing lamps
z
Not identical. Make sure to install them
in the correct locations.
„
Two thermistors, three thermostats
z
The thermostats prevent overheating.
Thermostats
Thermistors
Service manual, section 6.12.2
ˆ
The two thermistors are used to control the fusing temperature.
ˆ
The three thermostats are used to detect when the fusing unit temperature gets too
high. If a thermostat trips, it must be replaced.
¾
The thermistor at the end of the roller is important when narrow-width paper is
continuously being fed through the fusing unit. At such times, the temperature
at central parts of the roller will drop because paper is constantly passing
through and cooling it down. However, the ends of the roller remain at high
temperature.