Image Forming Apparatus Error Reset Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming apparatuses face issues where they revert to an error state upon startup due to misdetected errors when the power supply is turned off forcibly, leading to delayed notification of the power supply switch state, which can result in the apparatus reverting to an error state upon next startup.
Innovation Solution
An image forming apparatus with a control unit that transitions into a suspend state upon power off, includes a notification unit to detect errors and revert from the suspend state, and issues a system reset upon next startup if an error is detected, preventing misdetected errors from persisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply is turned off forcibly to save energy, then energy consumption is reduced, but misdetected errors occur that cause the apparatus to revert to an error state upon next startup
Solution Approach 1:
The control unit performs preliminary actions by detecting errors before transitioning to the suspend state, and makes a reservation to issue a system reset upon next startup. This preliminary detection and reservation mechanism prevents misdetected errors from causing the apparatus to revert to an error state, while still allowing the power supply to be turned off forcibly for energy savings.
Solution Approach 2:
The notification unit provides feedback about errors occurring on the device to the control unit. This feedback mechanism allows the control unit to distinguish between genuine errors and misdetected errors, and to make informed decisions about whether to transition to suspend state or issue a system reset upon next startup, thereby preventing error state persistence.
2Loss of time
If the suspend state is transitioned into quickly for high speed startup, then startup time is reduced, but misdetected errors are not recognized and the apparatus reverts to error state
Solution Approach 1:
The control unit performs preliminary error detection before transitioning to the suspend state and makes a reservation to issue a system reset upon next startup. This preliminary action ensures that misdetected errors are identified and handled appropriately, preventing the apparatus from reverting to an error state while maintaining quick startup capability.
Solution Approach 2:
The control unit takes preliminary anti-action by making a reservation to issue a system reset upon next startup when an error is detected. This preemptive measure counteracts the potential harmful effect of misdetected errors before they can cause the apparatus to revert to an error state, thereby maintaining both quick startup and reliability.
3Duration of action of moving object
If error notification is delayed when power supply is turned off forcibly, then shutdown processing is delayed, but the suspend state is transitioned into and error is misdetected
Solution Approach 1:
The notification unit provides timely feedback about errors occurring on the device to the control unit during the shutdown process. This feedback mechanism ensures that error notification is not delayed, allowing the control unit to accurately distinguish between genuine errors and misdetected errors, and to make appropriate decisions about transitioning to suspend state or issuing a system reset.
Solution Approach 2:
The control unit performs preliminary error detection before completing the shutdown processing and transitioning to the suspend state. This preliminary action ensures that errors are detected with high accuracy even when shutdown processing takes time, preventing misdetected errors from occurring.
Data Source
AI summary
An image forming apparatus is provided with a power supply switch, a control unit configured to transition the image forming apparatus into a suspend state when the power supply switch is turned off by an operation of a user, a device to which a power supply is stopped forcibly when the power supply switch is turned off by the operation of the user, and a notification unit configured to notify the control unit of an error that occurred on the device, and the control unit, in a case where the error is notified of by the notification unit, controls the image forming apparatus to revert from the suspend state and resets the image forming apparatus.