4.1 General 4 Replacement Procedures
Satellite M40/M45, TECRA A4, dynabook Vx/4 Maintenance Manual 4-7
Tools and Equipment
For the safety of you and other people in the working environment, it is strongly recommended to
use electrostatic discharge (ESD) equipment. The proper use of this equipment will ensure
successful repair work and reduce the costs for fixing damaged components. The equipment and
tools required for disassembling and reassembling are:
? One 2 mm Phillips screwdriver
? One 4 mm flat-blade screwdriver
? Torx screwdriver
? Tweezers (for pulling out screws)
? ESD mats (for the floor and work desks)
? An ESD wrist strap or heel grounder
? Anti-static carpets or flooring
? Air ionizers (for highly electrostatic sensitive areas)
? A plastic card (in credit card size)
Screw Tightening Torque
To fasten screws, follow the torque values listed below. Over tightening can damage components
and screws. Under tightening can loosen the fastening or make screws come off, which may result in
short circuits or other damage.
? M2 (2 mm) 0.22 N?m (2.2 kgf?cm)
? M2.5 (2.5 mm) 0.36 N?m (3.5 kgf?cm)
? M3 (3 mm) 0.51 N?m (5.0 kgf?cm)
? M2.5x4 PSP TITE screws 0.204 N?m (2.0 kgf?cm)
? M2.5x6 GIZA TITE screws 0.36 N?m (3.5 kgf?cm)
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