Brother HL-1870N - Mtbf; Mttr

CHAPTER 5 PERIODIC MAINTENANCE
5-10
4. MTBF / MTTR
The meantime between failure (MTBF and the meantime to repair (MTTR) for this printer are
as follows;
MTBF: Up to 4,000 hours
MTTR: Average 30 minutes except the periodical maintenance parts (the Paper Feeding Kit)
and the printer control boards whose MTTR is average 5 minutes.