Lexmark X 850 Owners Manual

Repair information4-53
7500-XXX
Feed unit drive gear 27 tooth removal
1.Remove the media feed unit assembly. See “Media feed unit assembly 1 removal” on page 4-20 or 
“Media feed unit assembly 2 removal” on page 4-23.
2.Remove the harness from the bracket (A). 
3.Remove the three screws securing the bracket (A) to the media feed unit assembly. 
4.Remove the bracket (A). 
Note:  The gears may become detached from the bracket (A). 
5.Remove the hook securing the feed unit drive gear 27 tooth (B) to the...

4-54MFP Service Manual 7500-XXX
MPF feed unit assembly removal
1.Remove the MPF rear cover. “MPF rear cover removal” on page 4-58.
2.Disconnect the connector. 
3.Release the harness from the clamp. 
4.Remove the two screws securing the MPF feed unit assembly (A). 
5.Remove the MPF feed unit assembly (A). 
Note:  Before reinstalling, place the harness along the slot on the left of the MPF feed unit assembly (A) so it 
does not pinch the harness between the feed unit. 
A
Left
Clamp 

Repair information4-55
7500-XXX
MPF media out actuator and upper frame removal
1.Remove the MPF rear cover. See “MPF rear cover removal” on page 4-58.
2.Remove the MPF feed unit assembly. “MPF feed unit assembly removal” on page 4-54.
3.Remove the two hooks securing the upper frame (A). 
4.Remove the upper frame (A) by moving it up and out in the direction of the arrow. 
5.Remove the MPF media out actuator (B) by prying it outward with a flat tip screwdriver, then slide it out in 
the direction of the...

4-56MFP Service Manual 7500-XXX
Sensor (MPF media out) 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 two hooks securing the upper frame (A) to the MPF feed unit assembly. 
4.Remove the upper frame (A) by moving it up and out in the direction of the arrow. 
5.Disconnect the connector from the sensor (MPF media out) (B). 
6.Release the hooks securing the sensor (MPF media...

Repair information4-57
7500-XXX
MPF transport pinch roll assembly removal
1.Remove the MPF rear cover. Go to “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 two end screws securing the upper bracket (A) to the MPF feed unit assembly. 
4.Remove the upper bracket (A). 
5.Remove the one center screw securing the MPF transport pinch roll assembly (B) to the upper bracket (A). 
6.Release the bosses securing the MPF...

4-58MFP Service Manual 7500-XXX
MPF rear cover removal
1.Remove the one screw securing the MPF rear cover (A). 
2.Remove the MPF rear cover (A). 
Connector
Rear
A 

Repair information4-59
7500-XXX
MPF feed drive gear group 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 pickup spring (A) from the idler gear bracket assembly (B). 
Note:  Leave the pickup spring (A) attached to the MPF feed drive gear pickup (C). 
4.Remove the three screws securing the idler gear bracket assembly (B) to the MPF feed unit assembly. 
5.Remove the idler...

4-60MFP Service Manual 7500-XXX
MPF pressure pad 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 MPF pick roll. See “MPF pick roll removal” on page 4-64.
4.Remove the MPF feed shaft assembly. See “MPF feed shaft assembly removal” on page 4-63.
5.Remove the two springs (A) under the pressure pad (B). 
6.Turn the MPF upside down, and pry the shaft out with a flat blade...

Repair information4-61
7500-XXX
MPF transport roll assembly 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 two end screws securing the upper bracket to the MPF feed unit assembly. 
4.Remove the upper bracket. 
5.Remove the MPF transport gear - 18 tooth (A). 
Note:  The MPF transport gear - 18 tooth will be tight and requires extra force to remove. 
6.Remove the transport...

4-62MFP Service Manual 7500-XXX
MPF pick solenoid / pick lever 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 MPF feed drive gear group. See “MPF feed drive gear group removal” on page 4-59.
4.Remove one screw securing the pick solenoid (A). 
5.Disconnect the connector from the pick solenoid (A). 
6.Remove the MPF pick solenoid (A). 
Note:  When removing the pick solenoid...