G144
Ricoh Europe B.V.
Technical Training Centre
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40
Slide 40
Fusing Unit
Mechanism
Fusing lamp
Hot roller
Pressure roller
Thermistor and thermostat.
Safety features
1st protection device: Hardware cuts off when the
machine overheats (>207°C).
2nd protection device: Software cuts off when the
machine overheats (>220°C).
3rd protection device: Thermostat cuts off mains
power to the fusing lamp (>160°C).
5. Engine
More on Fusing Unit Overview
Safety Devices
Fusing power gets cut off when the front cover is opened.
LSU power gets cut off when the front cover is opened.
The temperature of the fusing units cover surface stays at less than 80ºC.
¾ This protects the user.
¾ A caution label is attached where the customer can see it easily when
the rear cover is opened
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