Screw tightening torque – Toshiba PORTEGE M400 User Manual

Page 244

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, use type 0 pit philips screwdriver.

Use, however, the PH point size “1” screwdriver for screws fixing the expansion
memory slot cover and the keyboard. 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).

4-6

[CONFIDENTIAL]

PORTEGE M400 Maintenance Manual (960-541)