Brother International HL 1850 Service Manual - Page 19

CHAPTER 1 GENERAL 3. SPECIFICATIONS 3.1 Printing Print method Electrophotography by semiconductor laser beam scanning Laser Wavelength: Output: 780 nm 5nnW max Resolution HQ1200 (for Windows° 95/98/Me, WindowsNT° 4.0, Windows° 2000/XP, and Mac OS) 600 dpi (for Windows° 95/98/Me, WindowsNT° 4.0, Windows° 2000/XP, DOS and Mac OS) 300 dpi (for Windows° 95/98/Me, WindowsNT° 4.0, Windows° 2000/XP, and Mac OS) Print quality Normal printing mode Economy printing mode (up to 25% and 50% toner saving) Print speed Normal: Up to 18 pages/minute (A4) UP to 19 pages/minute (Letter-size paper) Duplex printing: Up to 8.5 pages/nninute* (when loading A4 or Letter-size paper from the standard paper cassette.) Warm-up Max. 20 seconds at 23°C (73.4°F) First print Max. 12 seconds (when loading A4 or Letter-size paper from the standard paper cassette.) Print media Toner cartridge Life expectancy: 6,500 pages/cartridge (when printing A4 or Letter-size paper at 5% print coverage) Developer Drum unit Life expectancy: 20,000 pages/drum unit *NOTE: Print speed varies depending on the paper size or media type. For details, refer to APPENDIX 16 `PRINT SPEEDS WITH VARIOUS SETTINGS'. 1-4