User Guide

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
 One 4 mm LHSTIX 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. Overtightening can damage
components and screws. Undertightening 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)
 LCD screws
- By DTI 0.153 N･m (1.5 kgf･cm)
- By Sharp 0.092 N･m (0.9 kgf･cm)
- By Samsung 0.153 N･m (1.5 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 M20 Maintenance Manual