Main Board (WF-M5899 Series)

Adjustment / 調整

When replacing/removing this part, refer to the following pages and make sure to perform the specified operations including the required adjustments.

Repair Parts Adjustment/Checks Items and Order

Remove the four screws and then remove the Rear Housing Assy (A).

: C.B.P-TITE-SCREW-3x10-F.ZN-3C

Assembly / 組み立て

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

Disengage the hook, and remove the Maintenance Box Cover (A).
Open the ADF/SCN Unit and remove the screw securing the Housing Right (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Remove the three screws securing the Housing Right (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Lift the Housing Right (A) upward to release the two hooks on the front side of the Housing Right (A).
Remove the dowels to the rear, and lift up the Housing Right (A) to remove it.

Assembly / 組み立て

Insert the eight tabs on the Housing Right (A) to the positioning holes of the Housing Upper (B) and the RIPS Unit (C).
Open the ADF/SCN Unit and remove the screw securing the Housing Left (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Remove the two screws securing the Housing Left (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Lift the Housing Left (A) upward to release the two hooks each on the front side and rear side of the Housing Left (A), and then 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).
Remove the six screws securing the Housing Upper (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Lift the Housing Upper (A) and remove the Housing Upper (A) toward you.
Remove the two screws, then remove the ASF Front Cover (A) upward.
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Remove the two pieces of acetate tape (A), and disconnect the cable (C) from CN100 connector on the Main Board (B).
Release the cable (B) from the two guides and the clamp (A).
Release the cable (B) from the protective sheet (A) by opening the sheet in the direction of the arrow.

Assembly / 組み立て

Insert the two tabs of the protective sheet (A) into the two slits respectively.
Disconnect the ground wire (A), and while pushing the connector’s tab upward, disconnect the cable (C) from CN799 connector on the Main Board (B).

Close the ADF/SCN Unit (A) and remove the two screws, and remove the ADF/SCN Unit (A) upwards.

: 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.

Remove the screw and then remove the Hinge Assy (Left) (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Remove the three screws, and remove the Hinge Lower Cover (Left) (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Remove the two screws securing the Cable Guide (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
Check Point / チェックポイント

When removing the screws, if the screwdriver interferes with the ADF/SCN Unit, use a stubby screwdriver.
Peel off the CRCM FFC (B) from the CRCM FFC Sheet (A).
Peel off the double-sided tape at two locations and then remove the CRCM FFC Sheet (A).
Disconnect the cables (B) from the connector (CN20, CN51, CN56) of the Relay Board (A).
Remove the acetate tape (A), and release the cable (B) from the two guides.
Disconnect the two cables (B) from the connectors (CN74, CN80) of the Main Board (A).
Remove the two screws, and release the ground wire (A) from the slit to remove it.
- : C.B.S-TITE-SCREW-3x6-F.ZN-3C
Assembly / 組み立て

Attach the ground wire with the terminal (A) oriented as shown below.
Move the Cable Guide as shown below.

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

Check Point / チェックポイント

A ground wire (B) is connected to the PS Ground Plate (A) depending on the region of sale.

If the ground wire (B) is connected, remove the wire (B) by removing the screw.

: C.B.(O)SCREW,4X5,F/ZN-3C

Assembly / 組み立て

Assemble ensuring that screw types are correct.

Disconnect the FFCs (A) and cables (B) from the connectors (CN2, CN9, CN51, CN43, CN55, CN609) on the Main Board.
Disconnect the FFCs (A) and cable (B) from the connectors (CN3, CN67, CN66, CN68, CN41, CN8) on the Main Board.

Check Point / チェックポイント

Release the connector (CN41) on the Main Board by lowering the connector lock in the direction of the arrow.
Disconnect the cables (A) from the connector (CN33, CN802) on the Main Board.
Disconnect the FFCs (A) and cables (B) from the connectors (CN50, CN52, CN72, CN73, CN75, CN77) on the Main Board.
Remove the two pieces of double-sided tape for the FAX FFC (B) from the MB Shield Plate Upper (A), and remove the ferrite core (C) from the FAX FFC (B).
Release the PE Sensor Cable (B) from the clamp (A).
Peel off the double-sided tape of the Relay FFC (B) from the MB Shield Plate Upper (A).
Release the CR motor cable (B) from two clamps (A).
Remove the five screws securing the Main Board Assy (A).
- : C.B.P-TITE-SCREW-3x10-F.ZN-3C
- : C.B.S-TITE.P4.SCREW-3X8-F.ZN-3
Remove the screws securing the Main Board Assy (A).
- : C.B.P-TITE-SCREW-3x10-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.

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

Assembly / 組み立て

Affix the FFC (B) to connect to the Main Board Assy (A) connector (CN52) using double-sided tape at the positions in the figure below.

Remove the 8 screws and remove the MB Board Shield Plate Upper (A) to remove the Main Board (B).
- : C.B.S-TITE-SCREW-3x6-F.ZN-3C
- : C.B.S-TITE SCREW, 2.5X6,F/ZN-3C