TA Triumph-Adler DC 2435 - Manual (Page 371)

Default Setting (System Menu)
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Drum Refresh2
Use this mode when white spots appear on images. Takes about 90 seconds.
When you run [Drum Refresh 2], the machine makes a vibrating sound for about 90 seconds until drum
refreshing is completed. The toner soiling on the ejected paper is normal and does not indicate a fault.
NOTE: Drum Refresh2 cannot be performed while printing. Execute Drum Refresh2 after the printing is done.
To use [Drum Refresh2], load Ledger or A3 size paper into the Multi Purpose tray.
Use the procedure below to refresh the drum.
1 Press the System Menu key.
2 Press [ ], [Adjustment/Maintenance].
3 Press [ ], [Next] of Drum Refresh2.
4 Press [Execute] to perform Drum Refresh.
5 After Drum Refresh is completed, press [OK] to return to the Adjustment/Maintenance screen.
Developer Refresh
When the printing is too light or incomplete, even though there is enough toner, refresh the developer.
1 Press the System Menu key.
2 Press [ ], [Adjustment/Maintenance], [ ] and then [Next] of Developer Refresh.
3 Press [Start]. Developer Refresh begins.
NOTE: Waiting time may be longer when the toner is refilled during developer refresh.
4 Press [OK] after Developer Refresh is complete.