4 Replacement Procedures | 4.1 Overview |
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) 0.167 N∙m (1.7 kgf∙cm)
❑M2.5 (2.5mm) 0.294 N∙m(3.0 kgf∙cm)
❑ M3 (3mm) 0.549 N∙m(5.6 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
Grip Color
Some screws have a colored grip area to help you determine the length of the screw.
❑ Even numbered length screws: Brown |
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❑ Odd numbered length screws: White |
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❑ Special length screw: Blue |
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“Special length screw” means screws whose length is indicated | Grip area |
in an integral number to the first decimal places such as 2.5 mm, |
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2.8 mm and so on. |
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PORTEGE R100 Maintenance Manual |
