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 pan-shaped screw head).

Grip Color

Some screws have a colored grip area to help you determine the length of the screw.

“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.

4-6

[CONFIDENTIAL]

Satellite A50S/TECRA A3X Maintenance Manual (960-534)

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Toshiba A3X manual Screw Tightening Torque, Grip Color