Lexmark C 950 Service Manual

							Repair information 4-47
  5058-030
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Replacement warning:  If reusing an existing developer unit assembly, ensure that all traces of old carrier 
(B) are removed from the developer unit assembly, or print quality issues may occur.
B 
						

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To install the new carrier (B):
Warning:  Ensure that the carrier is installed evenly and uniformly in the assembly, or spillage may occur.
1.Open the appropriate bag, and dump the appropriate carrier into the appropriate assembly.
2.Rotate the gears in the assembly to evenly distribute the carrier (B).
Warning:  Ensure that the two seals are properly positioned in the assembly before replacing the top cover 
(A), or spillage may occur which may lead to print quality problems.
Warning:  Ensure that the four plastic tabs in the top cover (A), are inserted into the four holes in the 
developer unit or the carrier (B) will be ejected from the developer unit assembly which will result in carrier 
contamination and print quality problems.
3.Replace the top cover (A).
4.Perform the ATC sensor setup and adjustment. Go to “Sensor (ATC) setup” on page 4-392.
5.Perform the color registration (RegCon) setup and adjustment. 
Developer housing (C) 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 ATC sensor PCB bracket. See “ATC sensor PCB bracket removal” on page 4-25.
11.Remove the waste toner auger chute. See “Waste toner auger chute removal” on page 4-191.
B
SealSeal
ATabs
HookHook 
						

							Repair information 4-49
  5058-030
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12.Lift the appropriate plastic gate, and push it in to reduce toner spillage.
13.Detach the lower portion (A) of the auger from the appropriate developer housing.
12
A 
						

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14.Swing away the lower portion of the auger to enable access to the two screws.
15.Remove the two screws (B) from the bracket.
B 
						

							Repair information 4-51
  5058-030
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16.Move the lever counterclockwise.
17.Remove the bracket mounted over the developer housing. 
						

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18.Remove the developer housing.
Reinstallation warning: When reinstalling the developer housing, ensure that the printhead retract levers are in 
their uppermost position, or damage will occur to the machine. If the developer housing is installed correctly, the 
bracket (C) can be mounted over the developer housing without difficulty.
Re-installation notes:
C 
						

							Repair information 4-53
  5058-030
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•To complete the re-installation, do the following:
a.Be sure to attach the lower part of the auger properly to reduce toner spillage.
b.Move the lever clockwise.
c.Pull the plastic gate (D), and move it to its lowest position.
D 
						

							4-54  Service Manual 5058-030  
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•Move the appropriate wiper in and out to clean the printhead.
Developer housing (K) 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 ATC sensor PCB bracket. See “ATC sensor PCB bracket removal” on page 4-25.
11.Remove the waste toner auger chute. See “Waste toner auger chute removal” on page 4-191.
12.Lift the appropriate plastic gate, and push it in to reduce toner spillage.
12 
						

							Repair information 4-55
  5058-030
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13.Detach the lower portion (A) of the auger from the appropriate developer housing.
14.Swing away the lower portion of the auger to enable access to the two screws.
A 
						

							4-56  Service Manual 5058-030  
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15.Remove the two screws (B) from the bracket.
16.Move the lever counterclockwise.
B