Lexmark X 850 Owners Manual

Repair information4-193
7500-XXX
ADF feed-out roll assembly removal
1.Remove the ADF unit assembly. See “ADF unit assembly removal” on page 4-159.
2.Open the ADF left cover assembly.
3.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166.
4.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
5.Remove the document tray assembly. See “Document tray assembly removal” on page 4-164.
6.Remove the ADF registration motor. See “ADF registration motor...

4-194MFP Service Manual 7500-XXX
Warning:  Do not touch the rubber surface of the ADF exit roll assembly (G).
C
DA B
F
Plastic
clipE
JIKG HA
FrontPlastic
clip
C 

Repair information4-195
7500-XXX
ADF separation roll guide assembly
1.Open the ADF left cover assembly.
2.Lift the separation roll guide assembly (A) to it uppermost position.
3.Lift and remove the separation roll guide assembly (A).
Note:  Extra upward force is required to remove the separation roll guide assembly.
AB
Rear 

4-196MFP Service Manual 7500-XXX
ADF exit roll assembly removal
1.Open the ADF left cover assembly.
2.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166.
3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
4.Remove the ADF feed drive motor assembly. See “ADF feed drive motor assembly removal” on 
page 4-172.
5.Remove the ADF separation roll guide assembly. See “ADF separation roll guide assembly” on 
page 4-195.
6.Loosen the screw securing the...

Repair information4-197
7500-XXX
21.Remove the ADF exit roll assembly (H).
Front
G
Plastic clip
K
B AC
Rear
E
HI
Rear
BC
J
D
F 

4-198MFP Service Manual 7500-XXX
ADF transport roll assembly removal
1.Open the ADF left cover assembly.
2.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166.
3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
4.Remove the ADF feed drive motor assembly. See “ADF feed drive motor assembly removal” on 
page 4-172.
5.Remove the actuator/media guide assembly. See “Actuator/media guide assembly removal” on 
page 4-190.
6.Remove the e-clip securing...

Repair information4-199
7500-XXX
Sensor (document set) removal
1.Open the ADF left cover assembly.
2.Lift the document tray assembly.
3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
4.Disconnect the connector from the sensor (document set) (A).
5.Release the hooks securing the sensor (document set) (A).
6.Remove the sensor (document set) (A).
AConnector
Rear 

4-200MFP Service Manual 7500-XXX
Sensor (sheet through) removal
1.Open the ADF left cover assembly.
2.Lift the document tray assembly.
3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
4.Disconnect the connector from the sensor (sheet through) (A).
5.Release the hooks securing the sensor (sheet through) (A).
6.Remove the sensor (sheet through) (A).
A
Rear
Connector 

Repair information4-201
7500-XXX
ADF registration motor removal
1.Open the ADF left cover assembly.
2.Lift the document tray assembly.
3.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
4.Remove the access cap (A).
5.Disconnect the connector from the ADF registration motor (A).
6.Remove the tension spring (B) from the ADF registration motor (A).
7.Remove the two screws securing the ADF registration motor (A).
8.Remove the registration main drive belt (C).
Note:  Before reinstalling...

4-202MFP Service Manual 7500-XXX
Sensor (document tray width 1) removal
1.Open the ADF left cover assembly.
2.Lift the document tray assembly.
3.Remove the five screws securing the cover (A).
4.Remove the cover (A).
5.Remove the two screws securing the bracket (B). 
6.Remove the bracket (B).
7.Remove the connector from the sensor (document tray width 1) (C).
8.Release the hooks securing the sensor (document tray width 1) (C).
9.Remove the sensor (document tray width 1) (C).
Note:  The sensor (document...