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4 Replacement Procedures 4.1 General
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)
4-6 Satellite M40/M45, TECRA A4, dynabook Vx/4 Maintenance Manual