Lexmark X543 Service Manual

Repair information4-77
Lexmark confidential until announce7525xxx
5.Disconnect the operator panel cable (B).
6.Remove the two screws (C) attaching the USB connector to the operator panel. 
Set the USB connector aside to attach to the new operator panel.
7.Remove the ground wire from the op panel.
CB 

4-78Service Manual 7525xxxLexmark confidential until announce
Op panel bezel removal
1.Place a flatbed screwdriver under the front of the bezel.
2.Pry the bezel up and away from the op panel. Be careful to avoid marring the bezel cover. 

Repair information4-79
Lexmark confidential until announce7525xxx
Op panel cable
1.Remove the operator panel bezel cover.
2.Remove the operator panel. See “Operator panel removal” on page 4-76.
3.Remove the flatbed assembly. See “Flatbed removal” on page 4-53.
4.Remove the CCD cable cover.
5.Unroute the operator panel cable through the tabs (B).
Warning:  When replacing the op panel and USB cables, the cables must be routed in the exact same route with 
no overlapping of the cables. Failure to do so can...

4-80Service Manual 7525xxxLexmark confidential until announce
3.Pull the logo cover away from the op panel bezel cover.
Fax card removal
1.Remove the rear shield. See “Rear shield removal” on page 4-7.
2.Disconnect the fax interface cable from the fax card. See “Fax interface cable” on page 4-80.
3.Remove the three screws (A) which secure the fax card to the standoff on the controller board.
4.Remove the fax card.
Fax interface cable
1.Carefully detach the fax interface cable from the fax card....

Repair information4-81
Lexmark confidential until announce7525xxx
Output bin tray
1.Grasp and lift the rear output bin tray away from the MFP. 

4-82Service Manual 7525xxxLexmark confidential until announce 

Locations5-1
Lexmark confidential until announce7525xxx
5.  Locations
Exterior views
Front
Front view 
Callout Part name
1 Operator panel
2 ADF input tray
3 Output bin
4 AIO release
5 Right imaging unit cover (right cover)
6 Primary paper tray
7 Manual feeder
8 Multipurpose feeder
3D
E
F6M
N
O9W
X
Y
Z#2A
B
C5J
K
L8T
U
V01@!.G
H
I4P
Q
R
S7*
3D
E
F6M
N
O9W
X
Y
Z#2A
B
C5J
K
L8T
U
V01@!.G
H
I4P
Q
R
S7*
123
4
5
6 7
123
4
5
6
7
8 

5-2Service Manual 7525xxxLexmark confidential until announce
Rear
Rear view
Callout Part name
1Power
2Line
3Line
4 Ethernet 
5USB
6 Wireless antenna
1
2
5
43
6 

Locations5-3
Lexmark confidential until announce7525xxx
Interior view 

5-4Service Manual 7525xxxLexmark confidential until announce
Printer boards
Controller Board