MFG # DR510 | ADS # BRODR-510
When the "Drum" LED blinks, you need to replace the drum unit.
There are many factors that determine the actual drum life, such as temperature, humidity, type of paper, type of toner used, the number of pages per print job, etc. The actual number of pages that your drum unit will print may be significantly less that this estimate. For best performance, use only genuine Brother toner.