Lexmark X 850 Owners Manual

Repair information4-23
7500-XXX
Media feed unit assembly 2 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.Open the printer left lower door assembly. See “Printer left lower door assembly removal” on 
page 4-70.
5.Remove the vertical drive gear assembly. See “Vertical drive gear assembly...

4-24MFP Service Manual 7500-XXX
7.Release the plastic bosses on both ends of the vertical turn guide (A). 
8.Remove the vertical turn guide (A). 
ALeft 

Repair information4-25
7500-XXX
9.Release the harness from the plastic clamps on the machine. 
10.Disconnect the harness connector from the machine. 
11.Remove the two screws securing the media feed assembly (B). 
12.Remove the media feed assembly (B) in the direction of the arrow. 
BLeft Harness
connector
Clamp 

4-26MFP Service Manual 7500-XXX
Media tray side guides removal
1.Remove the media tray. 
2.Remove the two e-rings securing the metal bottom plate (A) to the media tray using a small prying tool. 
3.Push the front hinge point (B) in the direction of the arrow to release the front boss from the metal bottom 
plate (A). 
4.Remove the metal bottom plate (A) by sliding it off the rear boss. 
AE-ring
Tray
Front
B
Front
E-ring
A
Square hole
Rear boss
Boss 

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5.Remove the two screws securing the two pinion gears (C) to the media tray. 
6.Remove the pinion gears (C).  

4-28MFP Service Manual 7500-XXX
7.Remove the front media guide assembly (D) and the rear media guide (E) by sliding them toward the 
center of the media tray assembly and lifting up. 
Note:  Before reinstalling the pinion gears (C), slide the front media tray guide assembly (D) and the rear 
C
D
Front
E 

Repair information4-29
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media guide (E) to their outward most positions. Ensure the media side guides slide smoothly. 
C E
Front 

4-30MFP Service Manual 7500-XXX
Media tray end guide removal
1.Remove the media tray. 
2.Remove the media tray side guides. See “Media tray side guides removal” on page 4-26.
3.Remove the media side guide actuator (A). 
Lock lever
Square holeD Front
A
Hole
Hook 

Repair information4-31
7500-XXX
4.Turn the media tray assembly upside down, and remove the screw and two hooks securing the actuator 
link (B) to the media tray. 
5.Release the boss on the media end guide actuator (C) from the hole in the actuator link (B) by moving the 
link in the direction of the arrow. 
6.Remove the media end guide actuator (C). 
7.Turn the media tray assembly right side up, and slide the media tray end guide (D) toward the center of the 
media tray assembly to remove. 
B
Hook
End...

4-32MFP Service Manual 7500-XXX
Media tray lift gear group removal
1.Remove the media tray from the machine. 
2.Remove the two screws securing bracket (A). 
3.Remove the bracket (A). 
4.Remove the tray lift coupling gear 13 tooth (B) from bracket (A). 
5.Remove the tray lift gear 13/60 tooth (C) from bracket (A). 
Note:  Extra force is required to pull the tray lift coupling gear 13 tooth (B) and the tray lift gear 13/60 tooth (C) 
from bracket (A). 
CRear A
B