
Customer Replaceable Units
Replacing the Toner Cartridge
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| The Toner Cartridge is a customer replaceable unit. This |
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| assembly holds the toner for the WorkCentre Pro 421. |
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| After approximately 7,500 copies the machine will display a |
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| message to replace the toner. When this message appears |
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| install a new toner cartridge. |
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| WARNING:When ordering a new Toner Cartridge make |
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| sure the correct cartridge is ordered for the WorkCentre |
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| Pro 421. For assistance, the product number is displayed |
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| on the cartridge box. |
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| CAUTION: Do not shake an empty cartridge or hold it |
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| close to you. Some toner residue might accidentally spill. |
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| Do not shake the empty Toner Cartridge and return it to |
| the machine to extend its use. | |
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| Open the Front Cover. |
Maintaining the Product
WorkCentre Pro 421 User Guide |