Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 46

E Detailed Occurance Items
code code area
E012 -0301 -05 Title
Description
of detection
3
3-20
Description
A. Drum Speed Detection PCB (C) 1/2 signal error
(Controller Version 2x.xx or later)
B. Drum motor (C) error (Prior to Controller Version
1x.xx)
A. This error occurs when the Drum Speed Detection
PCB (C) 1/2 signal error is detected.
B. The lock signal for the drum motor (C) (M25) cannot
be detected within a specified period.
• Connector disconnected, Breaking (Breaking
(shorting))
• Drum (unit) not inserted
• Drum unit failure
• Encoder failure (This occurs in very rare cases.)
E Detailed Occurance Items
code code area
Measures A:
B:
NOTE:
In some rare cases, this error occurs when the encoder
is not installed with the drum speed detection PCB or
when dirt is applied to the sensor surface of the drum
speed detection PCB.
Description
A-1. Check the connection of the Drum Speed
Detection PCB (C) 1/2 (UN24/25). (Sensor side)
Sensor side: J7312, J7313, J8012
A-2. Check that the Encoder Wheel of the Drum
Speed Detection PCB (C) 1/2 is properly
installed.
A-3. Check the connection of the Drum ITB Driver
PCB (UN6).
PCB side: J1910
A-4. Take out the Drum Speed Detection PCB (C)
1/2 to clean the Drum Speed Detection PCB (C)
1/ and Encoder Wheel.
A-5. Replace the Drum Speed Detection PCB (C)
1/2.
A-6. Replace the Drum ITB Driver PCB.
B-1. Check the connection between the drum
motor (C) (M25) and the drum ITB driver PCB
(UN6). (Connection of the connector, Breaking
(Breaking (shorting)))
Motor side: J7304/J8021, PCB side: J1920
B-2. Check the connection between the drum
speed detection PCB (C) (UN24/23) and
the drum ITB driver PCB. (Connection of
the connector, Breaking (Breaking (shorting)))
Motor side: J7312/J7313/J8012, PCB side:
J1910
B-3. Reinstall the drum unit (C).
B-4. Replace the drum unit. (Drum drive may be
overloaded due to peeling of the blade, etc.)
B-5. Replace the drum ITB driver PCB.