Brother HL-2230 Service Manual page 163

<Life of Drum Unit>
The drum unit life is based on the "drum counter" or the "number of drum rotations".
Printing does not stop even when the drum unit reaches the end of life.
The drum counter is based on the total printed pages on each drum unit. This total
printed pages should be reset every time you replace the drum unit with a new one.
(Refer to <How to reset the drum counter> below.)
However, if the power switch is turned OFF/ON frequently or if you print few pages
per one job, only the number of drum rotations increases. Then, the number of drum
rotation exceeds the "drum counter" based on the total printed pages and the drum
unit may reach the end of life.
Average print page per one job and life of drum unit
26/27ppm model
Average print page (page/job)
Drum unit
20/21ppm model, 24ppm model
Average print page (page/job)
Drum unit
Drum rotations are required for the warm-up operation when the power is turned ON
or when the cover is opened or closed. Therefore, when these operations are
frequently performed, the life of drum unit is shortened. (The table below shows the
worst case in which the warm-up operation is performed when the power is turned
ON.)
Life of the drum unit in the case that the power is turned OFF/ON for every print job
26/27ppm model
Average print page (page/job)
Drum unit
20/21ppm model, 24ppm model
Average print page (page/job)
Drum unit
The numeral values provided in this page are as of June 2010. These values are
subject to change without prior notice.
<How to reset the drum counter>
(1) Open the front cover, and press the [Go] button for over 4 seconds. Make sure
that all LEDs light up.
(2) Release the [Go] button, and then make sure that all LEDs light off.
(3) Close the front cover, and press the [Go] button three times. Print the Printer
Settings, and then check whether the drum counter is reset or not.
1 2
12000 18000 22000
1 2
12000 18000 22000
1 2
7000 12000 16000
1 2
7000 12000 15000
5-18
3 · · · Continuance
40000
Page
3 · · · Continuance
39000
Page
3 · · · Continuance
40000
Page
3 · · · Continuance
39000
Page
Confidential