Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 50

E Detailed Occurance Items
code code area
E012 -0501 -05 Title
Description
of detection
3
3-24
Description
A. ITB Drive Roller Speed Detection PCB 1/2 signal error
B. ITB drive motor error
A. This error occurs when the ITB Drive Roller Speed
Detection PCB 1/2 signal error is detected.
B. The lock signal for the ITB drive motor (M3) cannot be
detected within a specified period.
• Connector disconnected, Breaking (Breaking
(shorting))
• 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.)
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 1/2 (UN16/17). (Sensor
side)
Sensor side: J7318, J7319, J8047
A-2. Check that the Encoder Wheel of the ITB
Drive Roller Speed Detection PCB 1/2 is
properly installed.
A-3. Check the connection of the Drum ITB Driver
PCB (UN6).
PCB side: J1912
A-4. Manually turn the Rotor of the ITB Drive Motor
(M3) clockwise and check that the ITB Rotation
Sensor Encoder Wheel rotates. If the Encoder
Wheel does not rotate, replace the Drum Drive
Unit.
A-5. Take out the ITB Drive Roller Speed Detection
PCB 1/2 to clean the ITB Drive Roller Speed
Detection PCB 1/2 and Encoder Wheel.
A-6. Replace the ITB Drive Roller Speed Detection
PCB 1/2.
A-7. Replace the Drum ITB Driver PCB.
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.