Lexmark X 850 Owners Manual

Repair information4-13
7500-XXX
Rear RIP card cover removal
1.Loosen the two screws securing the rear RIP card cover (A). 
2.Remove the rear RIP card cover (A) by moving it in the direction of the arrow. 
A
Rear 

4-14MFP Service Manual 7500-XXX
Option hookup cover removal
Remove the option hookup cover (A) from the rear lower cover (B) by moving it outward in the direction of the 
arrow. 
Rear
B
A 

Repair information4-15
7500-XXX
Rear upper cover removal
1.Remove the scanner interface cable assembly (A).
2.Remove the ADF interface cable assembly (B).
3.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
4.Remove the controller box side cover. See “Controller box side cover removal” on page 4-18.
5.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
6.Remove the four screws securing the rear upper cover (C) to the machine.
A
Rear
B 

4-16MFP Service Manual 7500-XXX
7.Remove the rear upper cover (C).
C
Rear 

Repair information4-17
7500-XXX
Controller box lower cover removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the two screws securing the controller box lower cover (A) to the machine.
3.Remove the controller box lower cover (A).
Rear
A 

4-18MFP Service Manual 7500-XXX
Controller box side cover removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Release the two hooks securing the controller box side cover (A) to the machine.
3.Remove the controller box side cover (A).
Rear
A 

Repair information4-19
7500-XXX
Switch (media size) removal
Note:  This procedure can be applied to tray 1 or tray 2 switch (media size). 
1.Remove media Tray 1 and media Tray 2. 
2.Remove one screw securing the switch (media size) (A) to the bracket inside the machine. 
3.Remove the connector from switch (media size) (A). 
4.Remove the switch (media size) (A). 
A Connector
Front
Connector 

4-20MFP Service Manual 7500-XXX
Media feed unit assembly 1 removal
1.Remove the MPF rear cover. See “MPF rear cover removal” on page 4-58.
2.Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-54.
3.Remove the printer left door assembly. See “Printer left door assembly removal” on page 4-75.
4.Remove the vertical drive gear assembly. See “Vertical drive gear assembly removal” on page 4-67.
5.Pull out media Tray 1. 
Tray 1
Front 

Repair information4-21
7500-XXX
6.Release the plastic bosses on both ends of the vertical turn mylar guide (A). 
7.Remove the vertical turn mylar guide (A). 
Warning:  The vertical turn mylar guide will take extra force to remove. Be careful not to damage it.
8.Release the harness from the plastic clamps on the machine. 
9.Disconnect the connector. 
A
Left 

4-22MFP Service Manual 7500-XXX
10.Remove the two screws securing the media feed unit assembly (B). 
11.Remove the media feed unit assembly (B) in the direction of the arrow. 
BFront Clamp