Canon imageRUNNER ADVANCE C5000 Series, Техническое пособие

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PCB (FM3-9573-000), replace it.
a-4) Turn on the main power switch. If the symptom is not reproduced, the work is completed. If the
symptom is reproduced, check for other factors.
b) Pinching of the harness tie-wrap for Bk hopper
b-2) If the tie-wrap is pinched, shift the position of the tie-wrap forward or backward to allow it to be released.
b-3) If the flywheel is removed, install the flywheel and the rear cover, and turn on the main power switch. If
the symptom is not reproduced, the work is completed. If the symptom is reproduced, check for other
factors.
b-1) Turn off the main power switch, remove the rear cover, and check whether the harness tie-wrap for
yellow is not pinched in the gap between the toner supply pipe [a] and the metal plate [b] of the developing
drive unit. If it is not easily seen, remove the flywheel [1].
c) Clogging of toner in the toner supply pipe leading to the developing assembly
c-1) From the main body, remove the hopper unit of a color relevant to the failure.
c-2) Check the supply inlet of the developing assembly, and make sure there is nothing left, such as packing
material to be removed.
c-3) Remove 1 screw [1] and the toner supply pipe [2]. Here be sure not to turn the hopper unit upside down
as much as possible. Suck the toner out from the inlet supply with the vacuum cleaner as shown in the
photo.