Lexmark X 850 Owners Manual

Repair information4-313
7500-XXX
Duplex media transport rolls removal 
1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277.
2.Remove the duplex controller card assembly. See “Duplex controller card assembly removal” on 
page 4-304.
3.Remove the duplex drive gears 28T. See “Duplex drive gear 28 tooth removal” on page 4-283.
4.Remove the hooks of the four bushings (A) securing the two duplex media transport rolls (B) to the duplex 
unit assembly.
5.Remove the two duplex...

4-314MFP Service Manual 7500-XXX
Duplex media center transport roll removal 
1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277.
2. Remove the duplex controller card assembly. See “Duplex controller card assembly removal” on 
page 4-304.
3.Remove the hooks of the two bushings (A) securing the duplex media transport center roll (B) to the duplex 
unit assembly.
4.Remove the duplex media center transport roll (B).
Note:  When removing the duplex media center transport roll...

Repair information4-315
7500-XXX
Exit 2 removals 
Exit 2 unit assembly removal 
1.Open the printer left door assembly (A). 
2.Lift the two levers (B) while pulling the exit 2 unit (C) outward in the direction of the arrow. 
3.Remove the exit 2 unit (C). 
Note:  The rear side of the exit 2 unit (C) may require some force to disengage the electrical connector. 
Note:  Before reinstalling, ensure the exit 2 (C) unit is properly aligned and the electrical connector is properly 
connected. 
Left C B
A 

4-316MFP Service Manual 7500-XXX
Exit 2 unit docking lever removal 
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
2.Remove the two exit 2 unit docking levers (A) with a prying tool from the brackets (B). 
Note:  When removing the two exit 2 docking levers, ensure the brackets (B) are not bent or deformed. 
3.Remove the springs (C) from the brackets (B). 
Exit 2 left door handle removal 
FRONT
REAR
ACBA
C B 

Repair information4-317
7500-XXX
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
2.Open the exit 2 unit assembly. 
3.Remove two screws securing the upper guide assembly (A) to the exit 2 unit assembly. 
4.Remove the upper guide assembly (A). 
Note:  The exit 2 left door handle (B) may become detached.
5.Remove the exit 2 left door handle (B) from the upper guide assembly (A). 
6.Remove the spring (C) from the upper guide assembly (A). 
Note:  After reinstalling the...

4-318MFP Service Manual 7500-XXX
Exit 2 diverter gate removal 
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
2.Open the exit 2 unit assembly. 
3.Remove two screws securing the upper guide assembly (A) to the exit 2 unit assembly. 
4.Remove the upper guide assembly (A).
Note:  The exit 2 access handle (B) may become detached.
5.Remove the spring (C) connecting the exit 2 diverter gate (D) to the upper guide assembly (A). 
6.Gently flex the mounting points securing...

Repair information4-319
7500-XXX
Exit 2 left cover removal 
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 
2.Open the exit 2 unit assembly. 
3.Release two hooks securing the exit 2 left cover (A) to the exit 2 unit assembly. 
4.Move the exit 2 left cover (A) downward and outward in the direction of the arrow. 
5.Remove the exit 2 left cover (A). 
Note:  Extra force is required on the rear of the exit 2 left cover to break the seal of the double stick tape.
Double...

4-320MFP Service Manual 7500-XXX
Exit 2 right cover removal 
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315. 
2.Open the exit 2 unit assembly. 
3.Remove the exit 2 left cover. See “Exit 2 left cover removal” on page 4-319.
4.Remove the one screw securing the exit 2 front cover (A) to the exit 2 unit assembly.
5.Remove the exit 2 front cover (A).
6.Remove one screw securing the exit 2 rear cover (B). 
7.Move the exit 2 rear cover (B) upward and outward in the direction...

Repair information4-321
7500-XXX
11.Gently pry apart, with a flat tip screwdriver, the boss on the right then the one on the left to separate the 
exit 2 unit assembly into two pieces. 
Note:  The exit 2 unit assembly should be in two pieces. 
12.Remove the four screws securing the exit 2 right cover assembly (F) to the exit 2 unit assembly. 
13.Release two hooks securing the exit 2 right cover assembly (F) to the exit 2 unit assembly. 
14.Remove the exit 2 right cover assembly (F). 
Square...

4-322MFP Service Manual 7500-XXX
Standard bin full exit 2 actuator removal 
1.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
2.Open the exit 2 unit assembly (A). 
3.Remove the exit 2 left cover. See “Exit 2 left cover removal” on page 4-319.
4.Remove the exit 2 right cover. See “Exit 2 right cover removal” on page 4-320.
5.Remove the standard bin full exit 2 actuator outer (A) from the spring (B). 
6.Release the hooks securing the standard bin full exit 2 actuator...