Brother HL-1850 Service Manual page 289

APPENDIX
If the printer is connected to a parallel port, you can take the following steps;
(1) Open the Maintenance
Information utility, then
select ‘Get the Information’
in the menu.
(2) Select the LPT port you are
using and click the OK
button.
(3) Click the Exit button.
(4) The dialog box will appear and show the
frequencies of drum unit change, toner
cartridge change and paper jam.
Note that each maintenance information is counted under the conditions below;
Information
Drum unit change
Toner cartridge change
Paper jam
Conditions
When drum unit life is 100 pages or more, and the drum counter is
reset. (Maximum counter: 63)
When the toner cartridge is replaced after a Toner Empty error is
stored in NVRAM, then warming-up completes without a Toner
Empty or Toner Low error being detected. (Maximum counter:
127)
When a paper jam occurs. (Maximum counter: 2047)
A-22
Fig. A-6
Fig. A-7