Lexmark C 950 Service Manual

							Repair information 4-97
  5058-030
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K toner auger 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 inner plate. See “Inner plate removal” on page 4-95.
10.Lift the plastic gate, and push it in to prevent the toner from spilling.
11.Squeeze the two latches (A) to release the upper part of the auger.
12.Detach the lower portion (B) of the auger from the developer unit.
1
2 
						

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Warning:  The lower portion (B) of the auger is prone to damage. Extra care is required in handling this part.
A
B 
						

							Repair information 4-99
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13.Remove the K toner auger.
Re-installation note: Ensure that the rubber sleeve (C) is attached properly to prevent toner spillage. 
LED printhead 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 inner plate. See “Inner plate removal” on page 4-95.
10.Remove the appropriate developer unit. See “Developer housing (C) removal” on page 4-48, 
“Developer housing (M) removal” on page 4-59, “Developer housing (Y) removal” on page 4-65, or 
“Developer housing (K) removal” on page 4-54.
C 
						

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11.Remove the screw (A) from the appropriate printhead.
12.Gently pull the printhead out of the machine and remove.
A 
						

							Repair information 4-101
  5058-030
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Lower engine PCBA removal
1.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16.
2.Disconnect the input option cable (A).
3.Disconnect all the cables from the lower engine PCBA.
4.Remove the eight screws (D). 
						

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5.Detach the lower engine PCBA from the upper engine PCBA by moving it downward.
6.Remove the lower engine PCBA.
Replacement warning: When replacing the lower engine PCBA, ensure that all of the cables are properly 
reconnected.
Lower redrive shift motor assembly removal 
1.Remove the left upper cover. See “Left upper cover removal” on page 4-6.
2.Remove the upper redrive assembly. See “Upper redrive assembly removal” on page 4-186.
3.Remove the fuser. See “Fuser assembly removal” on page 4-81. 
4.Remove the rear upper cover. See “Rear upper cover removal” on page 4-16.
5.Disconnect the input option cable (A). 
						

							Repair information 4-103
  5058-030
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6.Remove the eight screws (B) securing the PCBA door to the machine.
7.Release the two clamps (C) to release the harness.
8.Swing the PCBA door open.
9.Remove the fuser redrive/lower redrive/1st BTR retract motor. See “Fuser/lower redrive/1st BTR retract 
motor removal” on page 4-94. 
						

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10.Gently pull the belt guide to detach it from the machine.
11.Remove the belt guide.
12.Detach the drive belt from the pulley.
13.Disconnect the three cables (D) from the lower redrive shift motor assembly. 
						

							Repair information 4-105
  5058-030
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14.Release the harness from the clamp (E).
15.Remove the screw (F) securing the plastic motor cover. 
						

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16.Remove the plastic motor cover.
17.Remove the two screws (G) securing the lower redrive shift motor assembly.
Note:  Move the shaft to its midmost position to provide access to the screws.