How to fix error code E840-0001 and error location solution is shown as Canon ir ADV 6275/6265/6255.

6075/6065/6055.
Code E840-0001
Fixing Shutter Motor error
The Fixing Shutter HP Sensor (PS53) failed the detection at the Fixing Shutter operation.
Remedy:
1. Check the operation of the Fixing Shutter Gear (overload, etc.).
2. Check the operation of the
Fixing Shutter Motor (M15) at the initialization
operation of the Fixing Shutter.
3. Check the detection of the Fixing Shutter HP Sensor (PS53)
if the Sensor operates normally).
4. Check the drawer of the Fixing Assembly and the host
machine.
5. Replace the Fixing Upper Unit and the
Fixing Drawer Harness Unit.
6. Replace the Main Driver PCB (PCB2) (check the fuse (FU11).