Lexmark X 850 Owners Manual

Repair information4-163
7500-XXX
Note:  When replacing the complete ADF media feed assembly, first remove the ADF left cover assembly and 
the ADF registration motor from the replacement part.
P758P786P755
P785
P761P754 A
Clamp B Set screw Connectors
D
F
ConnectorsP758P786P755
P785
P761P754 A
Clamp G B E Connectors
D
F
Clamps
Front
Rear 

4-164MFP Service Manual 7500-XXX
Document tray assembly removal
1.Remove the ADF front cover assembly. See “ADF front cover assembly removal” on page 4-166.
2.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
3.Open the ADF left cover assembly.
4.Release the wire clamp (A) that binds the harnesses together.
5.Disconnect the two connectors P759 and P760 from the ADF controller card assembly (B).
6.Remove the screw securing the green ground wire (C).
7.Remove the screw securing the...

Repair information4-165
7500-XXX
ADF rear cover removal
1.Open the ADF left cover assembly.
2.Lift the document tray assembly.
3.Remove the three screws securing the ADF rear cover (A).
4.Lift the ADF rear cover (A) upward.
5.Remove the ADF rear cover (A).
A
Rear 

4-166MFP Service Manual 7500-XXX
ADF front cover assembly removal
1.Open the ADF left cover assembly.
2.Remove the screw securing the ADF front cover assembly (A).
3.Lift the ADF front cover (A) upward.
4.Remove the ADF left cover assembly (A).
A
Front 

Repair information4-167
7500-XXX
ADF controller card assembly removal
1.Remove the ADF rear cover. See “ADF rear cover removal” on page 4-165.
2.Disconnect all connectors from the ADF controller card assembly (A).
3.Remove the five screws securing the ADF controller card assembly (A).
4.Remove the ADF controller card assembly (A).
Note:  Ensure that all connections are properly reconnected.
Note:  Ensure that the ground wire is reconnected.
P760P759P758
P785
P761
P751P752P753P754 P755 P786
P756
P757
A...

4-168MFP Service Manual 7500-XXX
ADF left cover 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 left cover media guide. See “ADF left cover media guide removal” on page 4-181.
5.Remove the screw securing the harness retainer (A).
6.Remove the harness retainer (A).
7.Remove the screw securing the left cover hinge...

Repair information4-169
7500-XXX
20.Remove the harness from the rectangular opening of the side of the ADF left cover assembly.
Note:  Before reinstalling the ADF left cover assembly (E), ensure that the harness is properly routed and is 
not pinched.
Note:  Ensure that the harnesses are properly captured by the harness guide (I).
Note:  Ensure that the green ground wire (G) and the grounding plate (H) is reconnected.
Note:  Ensure that the ADF left cover assembly (E) opens and closes without binding....

4-170MFP Service Manual 7500-XXX
J
IE
Connector
G
Connector
F
K
L
H 

Repair information4-171
7500-XXX
Left cover pinch roll assembly removal
1.Open the ADF left cover assembly.
2.Disconnect the connector from the sensor (pick roll position HP) (A).
3.Remove the three screws securing the left cover pinch roll assembly (B).
4.Remove the left cover pinch roll assembly (A).
A
Front
B
Connector 

4-172MFP Service Manual 7500-XXX
ADF feed drive motor assembly 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 ADF registration motor. See “ADF registration motor removal” on page 4-201.
5.Disconnect the three connectors from the ADF dual drive motor assembly (A).
6.Remove the screw securing the harness guide (B) to the ADF.
7.Remove the two screws securing the ADF dual drive motor...