E074-0001-05: Itb Hp Time Out Error - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

7. Error/Jam/Alarm
E074-0001-05 ITB HP time out error
Detection Description The HP Sensor in the Main Drive Unit did not detect home position within the specified period of
time.
Remedy [Related parts]
- Harnesses from the DC Controller PCB (UN049/J131) to the Primary Transfer Roller
Disengagement HP Sensor (PS33/J1189)
- Harness from the DC Controller PCB (UN049/J131) to the Primary Transfer Disengagement
Motor (M08/J1201)
- DC Controller PCB (UN049)
- Power Supply Unit
- Primary Transfer Roller Disengagement Motor (M08)
- Primary Transfer Roller Disengagement HP Sensor (PS33)
- Main Drive Unit
- ITB Unit
- Registration Patch Sensor Unit
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. Remove the ITB Unit and check whether the Primary Transfer Roller Disengagement Coupling
makes disengagement operation by rotating it by hand.
a. If it does not make disengagement operation
a-1. Replace the ITB Unit.
a-2. After replacing the ITB Unit, clean the Registration Patch Sensor Unit and execute auto
gradation adjustment and Auto Correct Color Mismatch.
- Settings/Registration> Adjustment/Maintenance> Image Adjustment> Auto Adjust Gradation>
Full Adjustment
- Settings/Registration> Adjustment/Maintenance> Adjust Image Quality> Auto Correct Color
Mismatch
a-3. If the error still occurs after replacing the ITB Unit, perform Procedure b to check the Main
Drive Unit.
b. If it makes disengagement operation
b-1. Check the Main Drive Unit by rotating the Primary Transfer Roller Disengagement Coupling
by hand at least once.
b-1-1. If it does not rotate smoothly, replace the Main Drive Unit.
b-1-2. If it rotates smoothly, check the Harness of the Primary Transfer Roller Disengagement HP
Sensor attached to the Main Drive Unit.
b-1-3. Remove the Primary Transfer Roller Disengagement HP Sensor (PS33) and check that the
Flag attached to the Gear on the same axle as the Primary Transfer Roller Disengagement
Coupling is not damaged.
b-1-3-1. If it is not damaged, replace the Primary Transfer Roller Disengagement HP Sensor
(PS33).
b-1-3-2. If it is damaged, replace the Main Drive Unit.
2. If the error is not cleared after performing the above remedy, check/replace the harness/cable,
connector and electric parts described as Related Parts above.
[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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