Detection method, equipment and circuit of fixing heating faults in printing device, and printing device

Abstract

The invention discloses a detection method of fixing heating faults in a printing device and equipment and a circuit thereof. The detection method comprises the following steps: if it is judged that a fixing heating part of the printing device hasn't been heated to fixing temperature within first scheduled time and supply voltage is less than a first voltage threshold, temperature of the fixing heating part is detected and whether the fixing heating part is heated to the fixing temperature within second scheduled time is judged; if it is judged that the fixing heating part is heated to the fixing temperature within the second scheduled time, a first fault signal is outputted; and if it is judged that the fixing heating part is not heated to the fixing temperature within the second scheduled time, a second fault signal is outputted. By the above detection method, whether the specific overtime reason of heating to the fixing temperature is that supply voltage is too low or a sensor operates poorly or the fixing heating part goes wrong can be judged so as to provide users with correct fault prompt information and avoid unnecessary maintenance work. The invention also discloses a printing device.

Description

technical field [0001] The present invention relates to the technical field of printing, and more specifically, to a detection method for a fixing temperature rise failure in a printing device, and its equipment and circuit. The present invention also relates to a printing device including a detection device or a circuit for fixing temperature rise failure. Background technique [0002] At present, in printing devices such as copiers, printers, and compound machines, the maximum time threshold required for heating to the fixing temperature is set in advance according to the normal power supply voltage range, and when the detection circuit detects that the heating is overtime, the machine will stop. The heating of the fuser heating part, and then an error is reported. At this time, the error display shows that the printing device has a fatal error, and after-sales maintenance personnel are required to repair it. However, the fixing heating overtime is not always caused by f...

AI Technical Summary

Problems solved by technology

However, the fixing heating overtime is not always caused by fatal errors such as machine sensors or fixing heating parts working badly, and the low power supply voltage of the machine can also cause the fixing heating overtime, but the existing printing device cannot detect the specific cause of the fixing heating overtime The reason is that the heating timeout problem caused by low power supply, since there is no problem with the printing device itself, asking after-sales service personnel to repair it will cause waste of resources and cause inconvenience to users

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