1-8 Service Manual
4061-xx0
Environment
Printer temperature and humidity
• Operating
– Temperature: 16 to 32° C (60° to 90° F)
– Relative humidity: 8 to 80%
– Altitude: 10,000 ft. (0 to 3,048 meters)
• Storage and shipping environment (packaged)
– Temperature: -40° to 43° C (-40° to 110° F)
– Relative humidity: 5% to 95%
– Altitude: equivalent to 10,300 meters (0 to 34,000 feet)
• Storage environment (unpacked)
– Temperature: 0° to 40° C (32° to 104° F)
– Relative humidity: 5% to 80%
Acoustics
All measurements are made in accordance with ISO 7779 and conform with ISO 9296.
Model Status
1 Meter average
sound pressure
Declared sound
power
Lexmark T640(n) Idle (standby mode)
30 dBA 4.0 Bels
Simplex printing
53 dBA 6.7 Bels
Duplex printing
55 dBA N/M Bels
Lexmark T642(n) Idle (standby mode)
32 dBA 4.7 Bels
Simplex printing
54 dBA 6.8 Bels
Duplex printing
57 dBA N/M Bels
Lexmark T644(n) Idle (standby mode)
30 dBA 4.5
Simplex printing
55 7.0
Duplex printing
58 N/M
Note: Measurements apply to 300 dpi, 600 dpi, and 1200 dpi printing.
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