Toshiba Satellite A300 Maintenance Manual - Page 135

Replacement Procedures Screw Tightening Torque Use the following torque when tightening screws. CAUTION: Overtightening may damage screws or parts. Undertightening may allow screws to loosen (and possibly fall out) causing a short circuit or other damage. NOTE: To tighten screws quickly and accurately, an electric screwdriver is recommended. • M2 (2mm) • M2.5 (2.5mm) • M2.5 (2.5mm) • M3.0 (3mm) 0.167 N·m (1.7 kgf·cm) 0.245 N·m(2.5 kgf·cm) 0.392 N·m(4.0 kgf·cm) for Hinge support 0.245 N･m (2.5 kgf･cm) NOTE: To prevent damage to THIN HEAD screws, press along the axis of the screwdriver while turning the screw. This is because the contact area between the screw and driver is less than for a pan head screw (standard pan-shaped screw head). Grip Color Some screws have a colored grip area to help you determine the length of the screw. • Even numbered length screws: Brown • Odd numbered length screws: White • Special length screw: Blue G rip a re a "Special length screw" means screws whose length is indicated in an integral number to the first decimal places such as 2.5 mm, 2.8 mm and so on. Satellite A300 Maintenance Manual(960-Q08) 4-6