E029-5008-05: Registration Patch Sensor (Front) Density Error - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

7. Error/Jam/Alarm
E029-5008-05 Registration Patch Sensor (Front) density error
Detection Description The background regular reflection output of the Registration Patch Sensor Unit (Front) did not fall
within the range from 115 to 1000 at initialization of the Developing Unit.
Remedy [Related parts]
- Power Supply Unit
- DC Controller PCB
- Registration Patch Sensor Unit
- ITB Unit
- Harness between the Low-voltage Power Supply PCB (J811) and the DC Controller PCB (J100)
- Harness between the DC Controller PCB (J120) and the Registration Patch Sensor Unit (J1022/
J1066)
[Points to note at work]
- At the recovery from this error, perform the following service mode.
- COPIER > FUNCTION > INSTALL > INISET-Y/M/C/K
- When replacing the ITB Unit or the Registration Patch Sensor, execute auto gradation
adjustment.
- Settings/Registration> Adjustment/Maintenance> Image Adjustment> Auto Adjust Gradation>
Full Adjustment
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. Check the value of the following service mode.
- COPIER > DISPLAY > DENS > P-B-P-C
If the value is less than 115, perform Procedure 2. If the value exceeds 1000, perform Procedure
5.
2. Check the Registration Patch Sensor Unit window and clean it with a blower if it is soiled. If the
dirt still remains, wipe the window in one direction with a moistened and firmly squeezed cotton
swab.
3. Check the installation/damage status of the shutter of the Registration Patch Sensor.
4. Check the Registration Shutter Solenoid (SL2) operation.
5. Check the Harness between the DC Controller PCB and the Registration Patch Sensor Unit.
6. Replace the Registration Patch Sensor Unit.
7. Check/replace the related harness/cable, connector and parts.
[Reference] Before replacing the DC Controller PCB, back up the service mode data and restore
the backup data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES
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