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How to Replace the Developer Unit

ENUS31539

Overview

Developer unit replacement procedure for CS31x, 41x, 51x, and C54x color laser printers

Developer unit replacement procedure for CX31x, 41x, 51x, and C54x color laser mfps

Affected products

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Properties

in the title section above for a full list of printer models.

Developer unit replacement procedure for CS31x, 41x, 51x, and C54x color laser printers

Step	Action	Illustration
1	Grasp the front door by the side handles and pull it forward. Caution—Hot Surface! The inside of the printer may be hot. To avoid injury, allow the components to cool off before continuing.	Click here to enlarge.
2	Open the top door by sliding the button forward.	Click here to enlarge.
3	Remove the toner cartridges by lifting the handles and then gently pulling away from the imaging kit.	Click here to enlarge.
4	Remove the right side cover.	Click here to enlarge.
5	Press the green levers on either side of the waste toner bottle, and then remove it.	Click here to enlarge.
6	Lift the blue levers on the imaging kit, and pull the kit towards you.	Click here to enlarge.
7	Press down on the blue levers, grasp the green handles on the sides, and then pull the imaging kit out of the printer. Warning—Potential Damage! Do not touch the underside of the imaging kit as this could damage it.	Click here to enlarge.
8	Remove the used developer unit.	Black Developer Unit Click here to enlarge. Yellow, Cyan and Magenta Developer Units Click here to enlarge.
9	Unpack the new developer unit. Leave the red packaging on the developer unit itself in place.	No Image
10	Place the old developer unit in the package provided.	No Image
11	Gently shake the developer unit from side to side.	No Image
12	Remove the red shipping cover from the developer unit.	Click here to enlarge.
13	Insert the new developer unit.	Click here to enlarge.
14	Align and insert the imaging kit.	Click here to enlarge.
15	Gently, but firmly push the blue levers down until the imaging kit drops into place.	Click here to enlarge.
16	Reinstall the waste toner bottle.	Click here to enlarge.
17	Reinstall the right side cover.	Click here to enlarge.
18	Reinstall the toner cartridges	Click here to enlarge.
19	Close the top cover.	Click here to enlarge.
20	Close the front door.	Click here to enlarge.

Developer unit replacement procedure for CX31x, 41x, 51x, and C54x color laser mfps

Step	Action	Illustration
1	Grasp the front door at the side handholds, and then pull it toward you to open it. Caution—Hot Surface! The inside of the MFP may be hot. To avoid injury, allow the components to cool off before continuing.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
2	Open the top door by sliding the button forward.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
3	Remove the toner cartridges by lifting the handles and then gently pulling away from the imaging kit.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
4	Remove the right side cover.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
5	Press the green levers on either side of the waste toner bottle, and then remove it.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
6	Lift the blue levers on the imaging kit, and pull the kit towards you.	Click here to enlarge.
7	Press down on the blue levers, grasp the green handles on the sides, and then pull the imaging kit out of the MFP. Warning—Potential Damage! Do not touch the underside of the imaging kit as this could damage it.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
8	Remove the used developer unit.	Black Developer Unit Click here to enlarge. Yellow, Cyan and Magenta Developer Units Click here to enlarge.
9	Unpack the new developer unit. Leave the red packaging on the developer unit itself in place.	No Image
10	Place the old developer unit in the enclosed package provided.	No Image
11	Gently shake the new developer unit from side to side.	No Image
12	Remove the red shipping cover from the developer unit.	Click here to enlarge.
13	Insert the new developer unit.	Click here to enlarge.
14	Align and insert the imaging kit.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
15	Gently, but firmly push the blue levers down until the imaging kit drops into place.	Click here to enlarge.
16	Reinstall the waste toner bottle.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
17	Reinstall the right side cover.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
18	Reinstall the toner cartridges	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
19	Close the top cover.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.
20	Close the front door.	For Lexmark X543/4/6 Click here to enlarge. For Lexmark X548 Click here to enlarge.

Still need help?

If you require additional assistance, please close this window, go to your product's support page and locate

Get In Touch with Lexmark! for contact information.
NOTE: When calling for support, you will need your printer model/machine type and serial number (SN). If you need help locating these, please click here. Please be near the products described in this article to expedite the support process and reduce call-back situations.

LEGACY ID: SO4604

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