Rev. D General Information 1-15
TM-U220 Technical Reference Guide
1.6.2 Reliability
1.6.3 Environmental Conditions
Operating temperature and humidity range
Life: Mechanism: 7,500,000 lines
MTBF: 180,000 hours
Failure is defined as a Random Failure occurring at the time
of the Random Failure Period.
MCBF: 18,000,000 lines
This is an average failure interval based on failures relating to
Wearout and Random Failures up to the life of 7.5 million
lines.
Print head life: 150 million characters (using an average of 2 dots/wire per
character). (The printing pattern is EPSON test pattern).
Autocutter life: 800,000 cuts
End of life is defined as the point at which the printer reaches
the beginning of the wearout period.
Temperature: During operation: 0 °C to 50 °C {41°F to 122 °F}.
(At 34 °C {93°F} or higher, there are humidity restrictions as
listed below. )
Humidity: During operation:10 to 90% (no condensation)
During storage:10 to 90% (no condensation; excludes paper
and ribbon)
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