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Technical Overview > Image Formation System > Service Tasks > Notes on service tasks
Technical Overview > Image Formation System > Service Tasks > Notes on service tasks
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Toner Cartridge Absence/Presence Detection
The engine controller detects the position of the Toner cartridge detection flag to judge the
absence/presence of the Toner cartridge.
At the time of turning on the power or closing the upper cover, the engine controller judges
the position of the Toner cartridge flag based on the output result of the Paper Leading Edge
Sensor (PS751).
When the output result of the Paper Leading Edge Sensor (PS751) is L, it is judged that the
Toner cartridge is absent; If being H, it is judged that the Toner cartridge is present.
Engine controller
PS751="H"
Toner cartridge
detection flag
Leading edge
sensor detection flag
PS751
PS751="L"
Toner
cartridge=Yes
Toner
cartridge=No
F-2-22
The Paper Leading Edge Sensor (PS751) performs both this detection and paper feed
detection. Therefore, the engine controller cannot make a judgment of ‘Toner cartridge
absent’ or ‘jam occurrence’ when jam occurs.
The engine controller judges this case as ‘Toner cartridge absent’ and notices it to the main
controller.
If jam occurs when ‘Toner cartridge absent’ is detected, check if there is a fault in the Paper
Leading Edge Sensor (PS751) and the detection flag.
Service Tasks
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At parts replacement
No task is required for this product at parts replacement.
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Maintenance
No periodically replaced parts, durable parts or periodical service is set for this product.
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Notes on service tasks
None.