Lexmark X 850 Owners Manual

Repair information4-103
7500-XXX
Sensor (fuser exit) removal
1.Open the printer left door assembly. 
2.Remove the fuser unit. See “Fuser unit assembly removal” on page 4-104.
3.Disconnect the connector from the sensor (fuser exit) (A). 
4.Remove the screw securing the bracket (B). 
5.Remove the three hooks securing the sensor (fuser exit) (A) to the bracket (B). 
6.Remove the sensor (fuser exit) (A). 
LeftB
Hook A 

4-104MFP Service Manual 7500-XXX
Fuser unit assembly removal
1.Open the printer left cover assembly. 
2.Loosen the two colored knobs securing the fuser unit (A). 
3.Pull on the two colored handles to remove the fuser unit (A). 
A
Left
Handle
Knob 

Repair information4-105
7500-XXX
Exit 1 media shift assembly removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-15.
4.Open the printer left door assembly. 
5.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
6.Open the printer front door assembly. See “Printer front door assembly removal”...

4-106MFP Service Manual 7500-XXX
15.Remove the exit 1 media shift assembly (B) by lifting it upward and outward in the direction of the arrow. 
Note:  When reinstalling the bracket (A), first release the hooks securing the plastic guide (C) that is attached 
to the bracket (A).
•Remove the plastic guide (C) from the bracket (A).
•Install the bracket (A).
•Install the plastic guide (C) and the standard bin full exit 1 actuator shaft (D) at the same time.
•Make sure the standard bin full exit 1 actuator...

Repair information4-107
7500-XXX
Media shift motor removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-15.
4.Open the printer left door assembly. 
5.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
6.Open the printer front door assembly. 
7.Remove the printer front left cover. See...

4-108MFP Service Manual 7500-XXX
Sensor (exit 1 media shift) removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. 
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-15.
4.Open the printer left door assembly. 
5.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
6.Open the printer front door assembly. 
7.Remove the printer front left cover. See “Printer front left cover removal” on...

Repair information4-109
7500-XXX
Sensor (exit 1 bin full) removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-15.
4.Open the printer left door assembly. 
5.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
6.Open the printer front door assembly. 
7.Remove the printer front left cover. See...

4-110MFP Service Manual 7500-XXX
Exit 1 media shift gear removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the rear upper cover. See “Rear upper cover removal” on page 4-15.
4.Open the printer left door assembly. 
5.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
6.Open the printer front door assembly. 
7.Remove the printer front left cover. See...

Repair information4-111
7500-XXX
D
Rear
B
Boss Right
C 

4-112MFP Service Manual 7500-XXX
Exit 1 drive belt removal
1.Remove the rear RIP card cover. See “Rear RIP card cover removal” on page 4-13.
2.Remove the rear motor cover. See “Rear motor cover removal” on page 4-11.
3.Remove the exit 2 unit assembly. See “Exit 2 unit assembly removal” on page 4-315.
4.Release the hook on the drive belt flange (A). 
5.Remove the drive belt flange (A). 
6.Remove the exit 1 drive belt (B) from the drive pulley - 25 tooth (C). 
Note:  The drive pulley -25 tooth (C) may...