Brother MFC-8420 User Manual page 404
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Also See for MFC-8420:
- User manual (427 pages) ,
- Service manual (353 pages) ,
- Quick setup manual (57 pages)
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4
Gently rock the toner cartridge from side to side five or six times
to distribute the toner evenly inside the cartridge.
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.
Toner Cartridge
TROUBLESHOOTING AND ROUTINE MAINTENANCE 22 - 30
Drum Unit
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