Lexmark X 850 Owners Manual

Repair information4-303
7500-XXX
8.Disconnect the connector of the harness from the duplex motor assembly (D) to the duplex main cable 
assembly.
9.Release the harness from the clamps of the duplex unit assembly.
10.Remove the two screws securing the duplex drive motor assembly (E) to the duplex unit assembly.
11.Remove the duplex drive motor assembly (E).
12.Remove the duplex drive motor duct (F) from the duplex drive motor assembly (E).
13.Remove the e-clip with a prying tool securing the duplex drive...

4-304MFP Service Manual 7500-XXX
Duplex controller card assembly removal 
1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277. 
2.Remove the two screws securing the duplex lower guide (A) to the duplex unit assembly.
3.Remove the duplex lower guide (A).
A
Right 

Repair information4-305
7500-XXX
4.Open the duplex unit assembly.
5.Release the hook of the duplex left door support strap (B) securing the duplex left cover (C) to the duplex 
unit assembly.
6.Remove the four screws securing the duplex left cover (C) to the duplex unit assembly.
7.Remove the duplex left cover (C). 
 
B
C HookB
Left 

4-306MFP Service Manual 7500-XXX
8.Disconnect all the connectors to the duplex controller card assembly (D).
9.Remove the two screws securing the duplex controller card assembly (D) to the duplex unit assembly.
10.Remove the duplex controller card assembly (D).
ConnectorsD
Right 

Repair information4-307
7500-XXX
Duplex sensor (duplex wait) removal 
1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277. 
2.Remove the two screws securing the duplex lower guide (A) to the duplex unit assembly.
3.Remove the duplex lower guide (A).
A
Right 

4-308MFP Service Manual 7500-XXX
4.Open the duplex unit assembly.
5.Release the hook of the duplex left door support strap (B) securing the duplex left cover (C) to the duplex 
unit assembly.
6.Remove the four screws securing the duplex left cover (C) to the duplex unit assembly.
7.Remove the duplex left cover (C). 
 
B
C HookB
Left 

Repair information4-309
7500-XXX
8.Disconnect the connector of the harness from the sensor (duplex wait) (D).
9.Release the hooks securing the sensor (duplex wait) (D) to the duplex unit assembly.
10.Remove the sensor (duplex wait) (D). 
D Hooks
Left
Connector 

4-310MFP Service Manual 7500-XXX
Duplex access handle removal 
1.Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-277. 
2.Remove the two screws securing the duplex lower guide (A) to the duplex unit assembly.
3.Remove the duplex lower guide (A).
A
Right 

Repair information4-311
7500-XXX
4.Open the duplex unit assembly.
5.Release the hook of the duplex left door support strap (B) securing the duplex left cover (C) to the duplex 
unit assembly.
6.Remove the four screws securing the duplex left cover (C) to the duplex unit assembly.
7.Remove the duplex left cover (C).
B
C HookB
Left 

4-312MFP Service Manual 7500-XXX
8.Remove the three screws securing the bracket (E) to the duplex unit assembly.
9.Remove the bracket (E).
10.Remove the spring (F).
11.Rotate the duplex left door handle (G) upward, and move in the direction of the arrow.
Note:  The metal shaft (H) may become detached.
12.Remove the duplex left door handle (G).
13.Rotate the duplex left door handle latch (I) upward, and move in the direction of the arrow.
14.Remove the duplex left door handle latch (I).
Left
H
E
F
G
1
2...