General information 1-7
Acoustics
All acoustic measurements are made in accordance with ISO 7779-1999 and reported in conformance with
ISO9296:1988-04-15.
Environment specifications
Operating mode
1-Meter average sound
pressure at 4800 CQ
MF920 MF923
Printing (simplex mono) 46 dBA 46 dBA
Printing (simplex color) 47 dBA 47 dBA
Printing (automatic
duplex mono)
50 dBA 50 dBA
Printing (automatic
duplex color)
50 dBA 51 dBA
Copy ADF (Mono) 50 dBA 49 dBA
Copy ADF (Color) 50 dBA 50 dBA
Scan ADF (Mono) 47 dBA 45 dBA
Scan ADF (Color) 46 dBA 45 dBA
Idle Inaudible Inaudible
Quiet Mode (simplex
mono)
45 dBA 45 dBA
Quiet Mode (simplex
duplex)
45 dBA 45 dBA
Environment Specifications
Operating
Air temperature—operating 15.6 to 32.20° C (60 to 90.0° F)
Air temperature—power off 10.0 to 43.30° C (50 to 110.0° F)
Air relative humidity Relative Humidity 8 to 80%
Wet bulb temperature—operating 22.80° C (73.0° F) maximum
Web bulb temperature—power off 26.70° C (80.10° F) maximum
Altitude 0–3,048 meters (10,000 ft.)
Atmospheric pressure 74.6 kPa
Ambient operating environment* 15.6 to 32.2° C (60 to 90° F) and 8% to 80% RH
Ship / Storage
Cartridges -40 to 43.3° C (-40 to 110.0° F)
Printer with cartridges -40 to 43.3° C (-40 to 110.0° F)
Printer without cartridges -40 to 43.3° C (-40 to 110.0° F)
Air relative humidity Relative Humidity 8 to 80%
Altitude 10,300 meters (34,000 feet)
Web bulb temperature—power off 26.70° C (80.10° F) Maximum
* In some cases performance specifications (such as paper OCF, EP cartridge usage) are specified to be
measured at an ambient condition.
Y112730-2
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