Canon IMAGERUNNER 1670F - Manual (Page 20)

Maintenance
Do not throw the toner cartridge or the drum cartridge into open flames. Toner
powder is flammable.
Keep the machine clean. Dust accumulation may prevent the machine from
operating properly.
Do not service the machine yourself except as specifically described in this
guide. If further servicing is required, contact your local authorized Canon
dealer.
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WARNING
WARNING
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