# Main Board Assy (WF-C579R Series)

1. Remove the four screws, then remove the Rear Cover (Back) (A).
   
   • : C.B.P-TITE-SCREW-3x10-F.ZN-3C

   Assembly / 組み立て

   Attach the two dowels of the Rear Cover (Back) (A) to the positioning holes on the Housing Left (B) and Housing Right (C).

2. Remove the two screws, then remove the Rear Top Cover (A).
   
   • : C.B.P-TITE-SCREW-3x10-F.ZN-3C
3. Open the ADF/SCN Unit (A).
   
4. Remove the three screws that secure the Housing Left (A).
   
   • : C.B.P-TITE-SCREW-3x10-F.ZN-3C
5. Lift the Housing Left (A) to release the two hooks on the front side of the Housing Left.
   
6. Disengage two hooks on the rear side of the Housing Left (A), and remove the Housing Left (A).

   
   

   Assembly / 組み立て

   Insert the eight tabs on the Housing Left (A) to the positioning holes of the Housing Upper (B) and the RIPS Unit (C).

7. Disengage the hook, and remove the Maintenance Box Cover (A).
   
8. Open the ADF/SCN Unit (A).
   
9. Remove the four screws that secure the Housing Right (A).
   
   • : C.B.P-TITE-SCREW-3x10-F.ZN-3C
10. Lift the Housing Right to release the two hooks on the front side of the Housing Right, then remove the Housing Right.

    
    

    Assembly / 組み立て

    Insert the four tabs of the Housing Right (A) to the positioning holes on the Ink Supply Unit.

11. Remove the six screws, then remove the Housing Upper (A).
    
    • : C.B.P-TITE-SCREW-3x10-F/ZN-3C
12. Disconnect the SCN PS cable (CN799) and the SCN USB cable (CN100) from the Main Board.

    
    

    Check Point / チェックポイント

    When disconnecting the SCN PS cable from the connector (CN799) (A), make sure to unlock the connector lock (B) beforehand.

13. Remove the terminal of grounding cable (A) from the frame of the Main Board.

    
    

    Assembly / 組み立て

    Route the SCN USB cable (A) through the three hooks and the clamp (B) as shown above. Make sure to secure the SCN PS cable (A) and the grounding cable (B) with the Polyester film (C).

14. Open the ADF/SCN Unit (A).

    
    

15. Remove the two screws and remove the ADF/SCN Unit (A) in the direction of the arrow.

    
    

    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C

    Assembly / 組み立て

    Before screwing the ADF/SCN Unit, make sure the hinges are properly attached in place. If the ADF/SCN Unit is opened when the hinges are NOT secured, the unit may be damaged.

16. Remove the each screw, and remove the two Hinge Assy (A) (B).

    
    

    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C

    Check Point / チェックポイント

    When removing the Main Board Assy on the way to the target part, remove the Hinge Assy (Left) (A) only.

17. Remove the three screws, and remove the two Hinge Lower Cover (A).

    
    

    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C

    Check Point / チェックポイント

    When removing the Main Board Assy on the way to the target part, remove the Hinge Lower Cover (Left) (A) only.

18. Release the all cable from the Cable Guide (A).
    
19. Remove the two screws, and remove the Cable Guide (A).
    
    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C

    Assembly / 組み立て

    Route the PS cable (A) through the two guides and hook on the Cable Guide. Route the Rear ASF Solenoid cable (A) through the six hooks on the Cable Guide. Route the Rear Unit Detection Sensor cable and Rear ASF Paper Detection Sensor cable (A) through the three hooks and the three hooks on the Cable Guide. Route the ASF motor cable (A) through the guide on the Cable Guide.

20. Remove the two screws, then remove the PS Ground Plate (A).
    
    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C
    • : C.B.S-TITE-SCREW-3x6-F.ZN-3C
21. Peel off the CRCM FFC (A).
    
22. Peel off the CRCR FFC Sheet (A).

    
    

    Check Point / チェックポイント

    When disconnecting the Panel FFC (CN42) (A), make sure to unlock the connector lock (B) beforehand.

23. Disconnect the FFCs (A) and cables (B) from the connectors (CN2, CN9, CN58, CN74, CN80, CN44, CN110, CN55, CN609) on the Main Board Assy.

    

24. Disconnect the FFCs (A) and cables (B) from the connectors (CN3, CN67, CN66, CN68, CN42, CN8) on the Main Board Assy.
    
25. Disconnect the cables (A) from the connector (CN33, CN31) on the Main Board Assy.
    
26. Disconnect the FFCs (A) and cables (B) from the connectors (CN50, CN52, CN72, CN73, CN75, CN77) on the Main Board.
    
27. Peel off the Fax FFC (A) from the Shield Plate, and Pull the Fax FFC out from the ferrite core (B).(WF-C579R only)
    
28. Release the PE sensor cable (A) from the clamp.
    
29. Peel off the Relay FFC (A) from the Shield Plate.
    
30. Release the CR motor cable (B) from two clamps (A).
    
31. Remove the following screws that secure the Main Board Assy.
    
    • : C.B.P-TITE-SCREW-3x10-F.ZN-3C
    • : C.B.S-TITE.P4.SCREW-3X8-F.ZN-3
    • : C.B.S-TITE-SCREW-3x6-F.ZN-3C
    • : C.B.S-TITE-SCREW-3x6-F.ZN-3C

    Caution / 注意

    In the next step, be careful not to damage the PF Scale (A).

32. Disengage hook of the Main Board Assy from the hole of the CR Guide Frame, then remove the Main Board Assy upward.

    
    

    Assembly / 組み立て

    Secure the PF Encoder FFC (A) with double-sided tape (B) as shown below.