Lexmark X 850 Owners Manual

Repair information4-173
7500-XXX
Inverter solenoid 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.Loosen the set screw securing the damper (A).
4.Remove the damper (A).
5.Disconnect the connector from the inverter solenoid assembly (B).
6.Remove the screw securing the inverter solenoid assembly (B).
7.Remove the inverter solenoid assembly (B).
8.Remove the plunger from the inverter lever (C).
Note:...

4-174MFP Service Manual 7500-XXX
Document set LED 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.Disconnect the connector from the document set LED (A).
4.Remove the screw securing the document set LED (A).
5.Remove the document set LED (A).
Connector
A
Front 

Repair information4-175
7500-XXX
Sheet through actuator removal
1.Open the ADF left cover assembly.
2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181.
3.Remove the ADF feed/pick roll assembly. See “ADF feed/pick roll assembly removal” on page 4-178.
4.Remove the screw from the green ground wire (A).
5.Remove the screw securing the grounding plate (B).
6.Remove the grounding plate (B).
7.Remove the two screws securing the harness guide (C).
8.Remove the...

4-176MFP Service Manual 7500-XXX
14.Remove the sheet through actuator (F).
Note:  Before reinstalling the rear bracket (E), replace any shims that were originally present.
C F
A DF
E
B
Spring 

Repair information4-177
7500-XXX
Sensor (pick roll position HP) removal
1.Open the ADF left cover assembly.
2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181.
3.Disconnect the connector from the sensor (pick roll position HP) (A).
4.Release the hooks securing  sensor (pick roll position HP) (A) to the ADF left cover assembly (B).
5.Remove the sensor (pick roll position HP) (A).
B
A
Connector 

4-178MFP Service Manual 7500-XXX
ADF feed/pick roll assembly removal
Warning:  Do not touch the rubber surface of the feed roll or the pick roll.
1.Turn the machine off.
Warning:  To reduce the chance of pick roll position errors and mechanical misalignments, ensure that the 
machine is turned off when replacing the ADF feed/pick roll assembly.
2.Open the ADF left cover assembly.
3.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181.
Note:  Rotate the rear most...

Repair information4-179
7500-XXX
C
B
AE
D
F
Set gate
Plate 

4-180MFP Service Manual 7500-XXX
Document set actuator removal
1.Open the ADF left cover assembly.
2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181.
3.Gently pry the document set actuator (A) from the ADF left cover assembly.
4.Remove the document set actuator (A).
A 

Repair information4-181
7500-XXX
ADF left cover media guide removal
1.Open the ADF left cover assembly.
2.Remove the screw securing the ADF left cover media guide (A).
3.Lift the ADF left cover media guide (A) upward, then remove the two bosses from the slot, and remove the 
two tabs from the holes.
4.Remove the ADF left cover media guide (A).
Note:  Before reinstalling the ADF left cover media guide (A), ensure that the two bosses and two tabs are 
correctly installed, or jamming will occur.
A Boss...

4-182MFP Service Manual 7500-XXX
Pick roll position motor assembly removal
1.Open the ADF left cover assembly.
2.Remove the ADF left cover media guide. See “ADF left cover media guide removal” on page 4-181.
3.Remove the document set actuator. See “” on page 4-179.
4.Remove the screw from the green ground wire (A).
5.Remove the screw securing the grounding plate (B).
6.Remove the grounding plate (B).
7.Remove the two screws securing the harness guide (C).
8.Remove the harness guide (C).
9.Disconnect the...