Dell Latitude LM, Service Manual, Page: 22 / 87

System Overview 1-11
Dual-Scan Display (Continued)
Dot pitch . . . . . . . . . . . . . . . . . 0.29 mm
Power consumption. . . . . . . . . 3.4 W
Controls. . . . . . . . . . . . . . . . . . brightness and contrast can be controlled
through key combinations
Keyboard
Number of keys. . . . . . . . . . . . 87 (U.S. and Canada); 88 (Europe); 89 (Japan)
Key travel . . . . . . . . . . . . . . . . 3.0
±
0.5 mm (0.12
±
0.02 inch)
Key spacing. . . . . . . . . . . . . . . 19.1 mm (0.75 inch)
Layout . . . . . . . . . . . . . . . . . . . QWERTY/AZERTY/Kanji
Touch Pad
Interface . . . . . . . . . . . . . . . . . PS/2-compatible
X/Y position resolutions . . . . . 20 points/mm (500 points/inch)
Size:
Thickness . . . . . . . . . . . . . 4.65 mm (0.18 inch) at highest component
Width . . . . . . . . . . . . . . . . 62.1-mm (2.4-inch) sensor-active area
Height . . . . . . . . . . . . . . . . 49.0-mm (1.9-inch) rectangle
with 0.5-mm (0.02-inch) tabs
Weight . . . . . . . . . . . . . . . . 15 g (0.52 ounce)
±
0.5 g (0.001 ounce)
Power:
Supply voltage . . . . . . . . . 5 V
±
10%
Supply current. . . . . . . . . . 4 mA (maximum operating current)
Table 1-2. Technical Specifications
(Continued)