Brother International HL 1850 Service Manual - Page 170
periodical
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CHAPTER 5 PERIODIC MAINTENANCE 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. 5-10
CHAPTER
5
PERIODIC
MAINTENANCE
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.
5-10