Drum Life - Sharp MX-2300 G Service Manual

The PM cycle means the replacement timing of periodic replace-
ment consumable parts which are required for maintaining the per-
formance.
The PM cycle is specified only for B/W output. For color output, it is
used as a reference value.
[Reason] Since the ratio of B/W to color differs depending on the
user's operation scene which varies every day, the PM cycle can-
not be specified in a certain cycle for color output.
Replacement of a PM item at the recommended life is performed
by the dealer's judgment or at PM call or at EM call.
Life end definition of a drum
When the drum counter exceeds the specified level of 100% black
output or 100% full color output, it is judged as life end.
However in practice, the number of rotations specifies quality
assurance policy of the tandem engine, where its wear cannot be
solely defined by the number of sheets but other operating condi-
tions including increased slip rotations depending on the ratio of B/
W to color and/or B/W printing in the color mode using the ACS.
The guaranteed number of rotations for the MX-2300/2700 series
drum is 715K.
200
150
100
50
0
0 1
Number of sheets of one print job
MX-2300/2700 N/G MAINTENANCE 9 – 4
The drum life is affected by the number of sheets of one print job.
This is because the actual life is determined by rotations of the
drum. If the number of sheets of one print job is less than 3 sheets,
the number of rotations for page is increased. As shown in the fig-
ure below, therefore, the number of sheets of drum life varies
depending on the number of sheets of one print job.
As a reference of the drum life, "Life meter" can be checked with
SIM22-1 from the accumulated number of rotations of each drum.
"Life meter" indicates the remained life (%) of the drum with the
entire drum life as 100%.
(Example) If the used number of rotations is 550K:
100(%) - 550 (K rotations) / 715 (K rotations) x 100 = 030 (%)
Drum counter
B/W
Drum 100K
* For 100% full color output by the user, the life of the black drum
is 60K similarly to the life of the color drums.

Drum Life

Black Drum
Color Drum
2 3 4
Number of rotations of drum
Full color B/W Full color
60K 715K rotations 715K rotations
5