Canon imageRUNNER ADVANCE C5000 Series Technical Workbook page 73

Due to the hopper bending toward the rear side of the main body or due to the distortion of the main body
frame, the link shaft for releasing the small door is not sufficiently protruded. Because of such insufficient
protruded length, the small window cannot be opened.
c) Damage on the toner insertion inlet cover sensor
Due to shock applied by opening/ closing of the front upper cover, the toner insertion inlet cover sensor is
damaged and is stuck to the ON side.
Service work
Verify the location of the cause, and perform either of the following measures:
a) Distortion of the sensor support plate and the open/ close detect flag installation area
a-1) Clear the error via service mode, and turn off the main power switch.
a-2) Open the front upper cover. Check the installed conditions of the sensor support plate [1] and the open/
close detect flag [2]. Also check whether distortion is found in the parts [1] and [2]. If any failure is found, fix
it.
a-3) Turn on the main power switch. If the symptom is reproduced, replace the toner supply cover open/
close sensor (WG8-5783-000). If the symptom is not reproduced, the work is completed.
b) Insufficient protruded length of the link shaft
b-1) Clear the error via service mode, and turn off the main power switch.
b-2) Remove 2 hinge pins [1] and remove the front upper cover [2].
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