Image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorTadashi Miyazaki
Life of this patent
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Abstract
In an image forming apparatus, a calculation processing portion includes an input portion and an input-portion abnormality determining portion. The input portion is connected to a temperature detection portion. When an abnormality detection circuit has detected that a temperature detected by the temperature detection portion is an abnormally heated temperature, the input-portion abnormality determining portion determines whether or not a first temperature calculated as a temperature of a fixing member is lower than a predetermined second temperature, and upon determining that the first temperature is lower than the second temperature, determines that the input portion is abnormal.
Claims8
An image forming apparatus comprising:
- a fixing member configured to fix a toner image to a sheet;
- a fixing heater configured to heat the fixing member;
- a temperature detection portion configured to detect a temperature of the fixing member;
- a driving circuit configured to drive the fixing heater based on the temperature detected by the temperature detection portion;
- an abnormality detection circuit connected to the temperature detection portion and configured to detect whether or not the temperature detected by the temperature detection portion is an abnormally heated temperature;
- a calculation processing portion including:
- an input portion connected to the temperature detection portion;
- and
- an input-portion abnormality determining portion configured to, when the abnormality detection circuit has detected that the temperature detected by the temperature detection portion is the abnormally heated temperature, determine whether or not a first temperature calculated as the temperature of the fixing member is lower than a predetermined second temperature, and upon determining that the first temperature is lower than the second temperature, determine that the input portion is abnormal.
Dependencies are inferred from the claim text.