User Manual - Page 384

For MFC-8420.

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22 - 32 TROUBLESHOOTING AND ROUTINE MAINTENANCE
5
Remove the protective cover.
6
Insert the new toner cartridge in the drum unit until it clicks into
place. If you put it in properly, the lock lever will lift automatically.
7
Clean the primary corona wire inside the drum unit by gently
sliding the blue tab from right to left several times. Return the
blue tab to the Home position () before reinstalling the drum
unit and toner cartridge assembly.
Toner Cartridge
Drum Unit
Corona Wire
T
a
b
Home Position()
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