E020-04B0 Cautions In Replacing The Drum Unit - Canon iR C3200 Series Service Manual

Symptom
After installation, when about 200 to 300 sheets have been fed through, the toner container motor (Bk) does not
rotate and error E020-04B0 is displayed. (Supplementary reference)
Description
* E020-0xB0 detection timing
Reduced T/D ratio due to life of drum unit. Broken wire in ATR sensor.
If the toner container motor does not rotate and toner is not supplied to the drum unit, the toner in the drum unit
will gradually run out and the T/D ratio will get lower.
This can be checked in service mode COPIER > Display > DENS > DENS-K.
Cause
Upon shipment from the factory, the cable relay jack (J674) of the toner container motor (Bk), leading from
the DC controller PCB was loose.
Items to Check
1 The operation of the toner container motor (Bk) can be checked with the following service mode procedure.
Under service mode level 1 COPIER > Function > PART-CHK > MTR, enter 5 and press OK.
2 Under service mode level 1 COPIER > Function > PART-CHK > MTR-ON, press OK.
If everything is normal, the toner container motor (Bk) will come ON in 10 seconds.
The problem in this case was that the motor did not rotate.
Field Remedy
First, check the listed items.
If the toner container motor is not operating, check the cables from the DC controller PCB J126-B4 to the cable
relay jack (J674) and to the toner container motor (Bk).
If the toner relay jack is loose, secure it.
If there is no toner container motor (Bk) drive signal output from the DC controller J126-B4, check the DC input
to the DC controller and, if there is nothing wrong, replace the DC controller.

16.3.10.22 E020-04B0 Cautions in replacing the drum unit

Symptom
Caution when replacing drum unit when E020-04B0 is displayed.
Cause
The treatment for E020-0xB0 is explained under Field Action.
Chapter 16
0002-3282
16-133