MX-B381, MX-B401 (serv.man7). JAN 2011 REVISED SERVICE MANUAL - Sharp Copying Equipment Service Manual (repair manual). Page 10

MX-B381/B401  CONSUMABLE PARTS  2 – 3

After detecting near end, when the toner density is lowered to the
specified level or lower and the toner sensor detects toner LOW
continuously for a certain time, it is judged as toner end.

• When the developer (developer cartridge)/drum counter exceeds

the specified number of sheets.

• When the rpm of the developer cartridge/drum cartridge exceeds

the specified number.

In an actual use, in the correction operation and the warm-up oper-
ation as well as the output operation, the developer cartridge and
the drum rotate idly.
If the correction operation and the warm-up operation are made fre-
quently, idle rotations of the developer cartridge and the drum are
increased accordingly.
Because of these factors, the consumption degree of the developer
cartridge and the drum cartridge cannot be determined only with
the print quantity. When, therefore, the number of rotations of the
cartridge exceeds the specified level, it is judged as life end.

As the reference for the drum/developer (developer cartridge) life.
the accumulated number of rotations can be displayed with SIM 22-
1. The value displayed with SIM 22-1 indicates the reached level in
percent (%) when the developer (developer cartridge)/drum life is
100%.

Example) Life 550K, used number of rotations 385K

385/550 x 100 = 70 (%)

*1: Selection of Display/Not Display can be made with Sim26-69. (Default: Not Display)
• When the drum cartridge is replaced with a new one, the print counter, the accumulated traveling distance counter, the accumulated rotation

number counter, and the usage day counter are automatically cleared. If SIM26-55 setting is set to ENABLE in that case, the guidance for
execution of the automatic adjustment of the engine is displayed.

• If SIM26-55 setting is set to DISABLE, SIM46-74 must be used to execute the automatic adjustment of the engine.
• If the above guidance does not disappear when the drum cartridge is replaced, SIM24-7 must be executed to clear the print counter, the

accumulated traveling distance counter, the accumulated rotation number counter, and the usage day counter, and the engine automatic
adjustment must be executed.

• The above display disappears when the counters are cleared.

Developer (Developer 
cartridge)/Drum

72K

550K rotations

Single multi

33,000

2 sheets multi

52,000

3 sheets multi

64,000

4 sheets multi

72,000

60,000

70,000

80,000

20,000

30,000

40,000

50,000

Numbers

of

printable

quantity

0

10,000

Single

multi

2

sheets

multi

3

sheets

multi

4

sheets

multi

Change the supplies. > Drum Cartridge

0 (Print continue)

Drum cartridge print counter

When 72K is reached

Enable

Drum cartridge accumulated rotation number

When 550K rotations is reached

Enable

The supplies will be needed soon.
> Drum Cartridge *1

1 (Print stop)

Drum cartridge print counter

When 90% of 72K is reached by the 
counter

Enable

Drum cartridge accumulated rotation number

When 90% of 550K rotation is 
reached by the counter

Enable

Change the supplies. > Drum Cartridge

1 (Print stop)

Drum cartridge print counter

When 72K is reached

Enable

When 72K + 1K is reached

Disable

Drum cartridge accumulated rotation number

When 550K rotations is reached

Enable

When 550K rotation + 430Kmm is 
reached

Disable