Image Forming Apparatus Wired Interface Boot Diagnosis
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Solution Overview
Problem
Existing image forming apparatuses face difficulties in determining the cause of failure when they fail to turn on, leading to unnecessary replacement of units and potential additional damage during repair, due to the inability to differentiate between power unit and main board issues.
Innovation Solution
The apparatus includes a detection circuit and a wired interface that allow the processor to boot using external power, enabling the display of status messages to identify power unit or main board issues, thereby facilitating accurate diagnosis without replacing units unnecessarily.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the apparatus uses only internal power unit for booting, then the power supply structure is simple, but the ability to diagnose power unit failures is lost
Solution Approach 1:
A wired interface (such as USB) is introduced as an intermediary channel to provide external power input and status message output. This intermediary enables diagnosis capability without requiring fundamental changes to the internal power supply structure, allowing the system to borrow diagnostic functionality from the external connection.
Solution Approach 2:
The wired interface is designed to serve multiple functions: it provides external power input for booting when the power unit fails, and simultaneously serves as a communication channel for outputting status messages. This multi-functionality resolves the contradiction by achieving diagnosis capability through a single added component rather than separate dedicated systems.
2Ease of repair
If the apparatus cannot differentiate between power unit and main board issues, then the control logic is simple, but unnecessary unit replacement occurs
Solution Approach 1:
The system implements feedback by outputting status messages through the wired interface that indicate whether the power unit or main board is faulty. This feedback mechanism provides real-time diagnostic information, enabling accurate identification of the failed component and preventing unnecessary replacements, thereby improving ease of repair without increasing repair time.
3Reliability
If the apparatus replaces power units without accurate diagnosis, then the repair process is simple, but additional damage may occur
Solution Approach 1:
The wired interface acts as a safe intermediary diagnostic tool that allows the system to communicate failure status without physically manipulating or replacing components. This enables accurate diagnosis and prevents premature replacement, improving repair safety while adding minimal complexity through the use of an existing communication interface.
Data Source
AI summary
An example image forming apparatus includes a main board having a processor, a power unit to provide driving power to the main board, a wired interface to connect with an external apparatus through a wired connection, a detection circuit to detect an operation status of the power unit, a display, and a processor. The processor, based on the power unit being detected to be in a non-operating status by the detection circuit in a state wherein a turn-on instruction was input, is to be provided with power from the external apparatus through the wired interface and is booted, and, based on the booting being completed, is to control the display to display a status of the power unit.