Specifications 167
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MICROPLEX Operator’s
Manual
MICROPLEX iF60C
Edition 1.0
3. Spare parts
Spare parts are exchanged by the service engineer, when they fail.
Examples
for
spare
parts
are:
- couplings
- electronic assemblies
- rollers
Depending on the application some parts may change categories under certain circumstances. If for
example very rough paper is used, the rollers can become an (application specific) wearing part.
It’s a fact, that the right time to exchange a component depends not only on the failure of a component
but also on a possible loss of print quality in the printouts.
MNPSQ
= Mean Number of Prints with Specified Quality (
SQ
).
This value is often associated with "Lifetime". This term is not correct. MNPSQ describes the period of
time in which a defined print quality is maintained.
The print quality is determined by the values for
- print density
- background darkness
- homogeneity
The value
IQ
(Initial Quality) is used to designate the print quality that is reached with a new printer.
CAQ
(Customer Acceptable Quality) is a purely subjective lower limit which a respective customer is
willing to accept the print quality. An exchange of parts is only then necessary even if the MNPSQ is
already exceeded.
IQ
SQ
CAQ
pages
quality
MNPSQ
MNPCAQ
Utilization time
exchange
exchange
