HP 3200m - Manual (Page 219)

EN Product Maintenance
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been discarded in the world’s landfills. To join this recycling effort,
follow the instructions provided in the box that contains the new toner
cartridge.
Extending toner life by redistributing toner
Areas of faded print are often an indicator that the toner cartridge is
near the end of its toner life. You can temporarily reestablish print
quality by redistributing the remaining toner in the cartridge. (This is
typically successful only twice.)