E020-0X90 /Abnormal Noise/Toner Leakage Occurs At The Time Of Installation Due To The Displacement Of Gear Inside The Drum Unit Cover - Canon imageRUNNER ADVANCE C2000 Series Technical Workbook

[Caution] Be careful not to break the claw when detaching the cap. If the cap gets broken, replace the High
Voltage Holder Assembly.
2) Correct the crossed ring [B] of the contact spring. Attach the cap by getting the spring through the slit of
the cap [A].
FM3-8160 HIGH VOLTAGE HOLDER ASS'Y
Title
E020-0x90 /abnormal noise/toner leakage occurs at the time of installation due to the displacement of gear
inside the drum unit cover
Symptom
At the time of installation or replacement of the drum unit, a machine having a serial number earlier than
below or a drum unit having a lot number earlier than below causes abnormal noise around the drum unit or
E020-0x90. In the worst cases, toner leaks from the drum unit.
- E020-0x90 : ATR Sensor error or toner supply error (x=0:Y, 1:M, 2:C, 3:Bk)
[Reference] As for the machine having the serial number below or later, and the drum units having the serial
number below or later, the positions of the take-up gear and the worm gear are checked.
pg. 70