Lexmark X543 Service Manual

Repair information4-67
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ADF separator roll assembly
1.Lift the locking lever (A).
2.Slightly lift the separator roll assembly, and pull it out of the mount (B) on the opposite side.
A
B 

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Bezel cover
1.Remove the op panel bezel. See “Op panel bezel removal” on page 4-78.
2.Remove the two screws (A) securing the bezel cover to the top of the op panel mounting frame.
3.Remove the AIO link. See “AIO link” on page 4-74.
4.Lift the flatbed unit to a 45 degree angle. Be careful to avoid damaging or disconnecting the CCD ribbon 
cable on the rear of the flatbed.
5.While holding the flatbed in place, remove the three screws (B)...

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6.While holding the op panel mounting assembly, remove the op panel bezel cover.
Redrive unit
1.Remove the flatbed assembly from the MFP. See “Flatbed removal” on page 4-53.
2.Place the flatbed facedown on a soft surface to avoid scratching the glass or marring the covers.
3.Remove the cable cover plate (A).
4.Remove the four screws (B) securing the redrive to the flatbed unit.
AB 

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5.Remove the bin full sensor flag located on the rear shaft.
Cover scanner left 
1.Remove the flatbed assembly. See “Flatbed removal” on page 4-53.
2.Release the tabs (A) securing the left flatbed cover to the flatbed unit using a small flatblade screwdriver.
A 

Repair information4-71
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Cover scanner right
1.Remove the imaging unit in the print engine.
2.Raise the scanner assembly to the up position, and lock in place.
3.Remove the four screws (A) securing the right scanner cover to the flatbed unit.
A 

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4.While holding the ADF away from the flatbed, use the other hand to lift and disengage the right scanner 
cover from the flatbed unit. 

Repair information4-73
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AIO release lever
1.Remove the right scanner cover. See “Cover scanner right” on page 4-71.
2.Remove the screw (A) securing the AIO link to the flatbed unit.
3.Disengage the AIO link from the flatbed unit.
4.Remove the screw (B) securing the AIO release lever to the flatbed.
5.Slide the AIO release lever towards the back of the flatbed.
6.Remove the spring and AIO release lever.
Note:  When reinstalling the AIO release lever, place the...

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AIO link
1.Lift the scanner to the up position. Use a phillips screwdriver to remove the screw (A) securing the AIO link 
to the AIO toner cover.
2.Return the flatbed to the down position.
3.Remove the screw (B) securing the AIO link to the flatbed unit. 
A
B 

Repair information4-75
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AIO toner cover
1.Lift the scanner unit to the up position.
2.Remove the screw (A) fastening the AIO toner cover to the scanner unit.
3.Remove the screw (B) securing the AIO hinge to the MFP.
4.Remove the hinge. Save this for the new AIO toner cover.
5.Rotate the AIO toner cover so the tab (C) on the cover lines up with the hole on the AIO toner cover.
6.Pull the AIO toner cover to the left, and remove it from the printer.
A
BC 

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Operator panel removal 
Warning:When replacing any one of the following components:
Operator panel assembly
Controller board
Replace only one component at a time. Replace the required component, and perform a POR before replacing a 
second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never 
replace both of the components listed above without a POR after installing each one, or the printer...