4 Replacement Procedures

4.1 General

Screw Tightening Torque

When you fasten screws, be sure to follow the torque list below.

CAUTION: Overtightening can damage components and screws; undertightening can result in electrical shorts or other damage if screws or components come loose.

NOTE: Toshiba recommends that you use an electric screw driver for quick and easy operations.

M2

0.167 N·m (1.7 kgf·cm)

M2.5

0.294 N·m (3.0 kgf·cm)

M3

0.549 N·m (5.6 kgf·cm)

NOTE: The computer contains several flat head screws. These screws have less contact area with the screwdriver, so be careful to press firmly enough to prevent the screwdriver from slipping out and damaging the screw head.

Color of Screw Shaft

To avoid mistakes on the screw length, screw shafts are colored as follows:

‰ Even number length screw:

yellow

‰ Odd number length screw:

pink

‰ Special length screw:

green

Screws whose lengths are indicated to one or more decimal places such as 2.5 mm or 2.6 mm.

Grip area

4-6

[CONFIDENTIAL]

TECRA S3 Maintenance Manual (960-532)

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Image 248
Toshiba S4 manual Screw Tightening Torque, Color of Screw Shaft