Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 51

E Detailed Occurance Items
code code area
E012 -0502 -05 Title A. ITB Drive Roller Speed Detection PCB 1 signal error
B. ITB drive motor error
Description A. The signal is not detected for 80msec or more.
of detection B. Lock signal of ITB drive motor (M3) cannot be
• Connector disconnected, Breaking (Breaking
• Drum (unit) Y/M/C/K not inserted
• Peeling of the ITB cleaning blade
• Encoder Y/M/C/K failure (This occurs in rare cases.)
Description
detected for the specified period of time after first
detection
(shorting))
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 ITB Drive Roller
Speed Detection PCB 1 (UN16).
Sensor side: J7318, J7319, J8047 PCB side:
J1912
A-2. Take out the ITB Drive Roller Speed Detection
PCB 1 to clean.
A-3. Replace the ITB Drive Roller Speed Detection
PCB 1.
A-4. Check if the Harness of the ITB Drive Roller
Speed Detection PCB 1 is faulty. (Replace the
Harness if it's disconnected.)
A-5. Replace the Drum ITB Driver PCB (UN6).
B-1. Check the connection between the ITB driver
motor (M3) and the drum ITB driver PCB (UN6).
(Connection of the connector, Breaking (Breaking
(shorting)))
Motor side: J7518, J8047, J8050 PCB side:
J1921, J8011, J8050
B-2. Check the connection of the ITB drive roller
speed detection PCB 1/2 (UN16/17). (Connection
of the connector, Breaking (Breaking (shorting)))
Motor side: J7318, J7319, J8047, J8050 PCB
side: J1921, J8011, J8050
B-3. Reinstall the 4 color drum units. (If the drum
unit is not installed properly, more load is applied
to ITB drive.)
B-4. Replace the drum unit. (Drum drive may be
overloaded due to peeling of the blade, etc.)
There may be cause in each color.
B-5. Replace the drum ITB driver PCB.
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