HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
7-13
< How to calculate Drum Unit Life >
The number of drum rotations per one page printing is about 11 rotations.
(Page counter reduced by the number of drum rotations) =
(the number of drum rotations) ÷ 11
- The number of drum rotations per one page printing continuously = 3.6
rotations.
- The number of drum rotations while warming-up = 9 rotations
Example:
The number of pages calculated from drum rotations
Cold start (page) Hot start (page)
1 page/job (9 + 11) / 11 = 1.82 11 / 11 = 1
2 pages/job (9 + 11 + 3.6) / 11 = 2.15 (11 + 3.6) / 11 = 1.33
18 pages/job (9 + 11 + 3.6 x 17) / 11 = 7.38 (11 + 3.6 x 17) / 11 = 6.56
If printing 1 page per job with cold start, the drum unit life is decreased
earlier.
(ii) Counter information, history information
The counter and history information related to the following term are
included. When it reaches the maximum count, each term is no longer
counted.
• Page counter
The total number of pages printed. The maximum count is 1 million
pages.
• Coverage on the Letter-size paper
Average printing rate. The average of the total printed area against
the printable are on the Letter-size paper. The coverage is calculated
when up to 1 million pages are printed, and it is not updated after this.
It is not printed on the Print Settings by default. (It is printed on the
maintenance sheet by default.)
• Total pages printed (TRAY)
The number of times that each of the Tray1, Tray2, Tray3, MP tray
and Duplex tray is used. (For the Duplex tray, the number of times is
printed only for the models supporting the Duplex tray, and it is not
printed for HL-5240.)
The maximum count for each item is 1 million times.
The information above is not cleared when replacing the PF kit.
• Total pages printed (PAPER)
The number of A4/Letter, A4Long/Legal/Folio, B5/Excutine, Envelope,
A5 and other paper types used. The maximum count for each item is
1 million times.
• Total paper jams
The number of paper jam occurrence in each of the Tray1, Tray2,
Tray3, MP tray and Duplex tray. (For the Duplex tray, the number of
occurrence is printed only for the models supporting the Duplex tray,
and it is not printed for HL-5240.)
The paper jam which occurs when the printer is turned ON is not
counted.
The maximum count for each item is 255 times.
• Replace count
The number of replacement of each of the drum unit, toner cartridge,
PF Kit, Tray 1/2/3, MP tray, fuser unit and laser unit. The
maximum count for each item is 65535 times.
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