Lexmark C 950 Service Manual

							Repair information 4-17
  5058-030
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Top rear cover (SFP) removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16.
2.Disconnect the input option cable (A).
3.Remove the eight screws (B) securing the PCBA door to the machine. 
						

							4-18  Service Manual 5058-030  
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4.Release the two clamps (C) to release the harness.
5.Swing the PCBA door open.
6.Remove the two screws (D) securing the top rear cover to the machine.  
						

							Repair information 4-19
  5058-030
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7.Remove the top rear cover. 
						

							4-20  Service Manual 5058-030  
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Print engine removal procedures
1st transfer conductor housing removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16.
2.Disconnect the input option cable (A).
3.Remove the eight screws (B) securing the PCBA door to the machine. 
						

							Repair information 4-21
  5058-030
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4.Release the two clamps (C) to release the harness.
5.Swing the PCBA door open.
6.Remove the transfer roll HVPS PCBA. See “Transfer roll HVPS PCBA removal” on page 4-178.
7.Remove the two screws (D) securing the bracket to the machine.
8.Remove the bracket. 
						

							4-22  Service Manual 5058-030  
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9.Remove the three screws (E) securing the 1st transfer conductor housing to the machine. 
10.Remove the 1st transfer conductor housing.
1st transfer retract clutch assembly removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16.
2.Disconnect the input option cable (A). 
						

							Repair information 4-23
  5058-030
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3.Remove the eight screws (B) securing the PCBA door to the machine.
4.Release the two clamps (C) to release the harness.
5.Swing the PCBA door open.
6.Remove the three screws (D) securing the 1st transfer retract clutch assembly to the machine. 
						

							4-24  Service Manual 5058-030  
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7.Disconnect the two cables (E).
8.Remove the 1st transfer retract clutch assembly.
2nd transfer roller removal
1.Open the printer left duplex door assembly.
2.Remove the screw (A) that secures the 2nd transfer roller.
3.Push the latch (B) to release the 2nd transfer roller.
4.Remove the 2nd transfer roller.
Reinstallation note:  When replacing the 2nd transfer roller, ensure that the screw is properly reinstalled. 
						

							Repair information 4-25
  5058-030
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ATC sensor PCB bracket removal
1.Remove the printer front door. See “Printer front door removal” on page 4-10.
2.Remove the transfer belt cleaner. See “Transfer belt cleaner removal” on page 4-175.
3.Remove the waste toner box.
4.Remove the four photoconductor units.
5.Remove the four toner supplies.
6.Remove the operator panel front cover. 
7.Remove the printhead retract door. See “Printhead retract door removal” on page 4-142.
8.Remove the inner cover. See “Inner cover removal” on page 4-3.
9.Remove the two screws from the ATC sensor PCB bracket (A).
10.Disconnect the five cables (B) from the ATC sensor PCB bracket.
A
B 
						

							4-26  Service Manual 5058-030  
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11.Detach the ATC sensor PCB bracket from the machine and remove.
ATC sensor PCB removal
1.Remove the printer front door. See “Printer front door removal” on page 4-10.
2.Remove the transfer belt cleaner. See “Transfer belt cleaner removal” on page 4-175.
3.Remove the waste toner box.
4.Remove the four photoconductor units.
5.Remove the four toner supplies.
6.Remove the operator panel front cover. 
7.Remove the printhead retract door. See “Printhead retract door removal” on page 4-142.
8.Remove the inner cover. See “Inner cover removal” on page 4-3.
9.Disconnect the five cables (A) from the ATC sensor PCB.
A