Tools And Equipment; Screw Tightening Torque - Toshiba NB250 Maintenance Manual

4 Replacement Procedures

Tools and Equipment

For your safety and that of other people in the working environment, it is strongly recommended
that you use electrostatic discharge (ESD) equipment. The proper use of this equipment will
ensure successful repair work and reduce the costs for repairing damaged components. The
equipment and tools required for disassembly and reassembly are:
 One 2 mm Phillips screwdriver
 One 4 mm flat-blade screwdriver
 Torx screwdriver with type T6 bit.
 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 secure screws, follow the torque values listed below. Over tightening can damage
components and screws. Under tightening can loosen the screw or cause screws to come off,
which may result in short circuits or other damage.
 M2 (2 mm)
 M2.5 (2.5 mm)
 M3 (3 mm)
 M2.5x4 screws
 M2.5x6 screws
NB250/NB255 Maintenance Manual
Downloaded from LpManual.com Manuals
0.15~0.20 N･m (1.5~2.0 kgf･cm)
0.26~0.30 N･m (2.5~3.0 kgf･cm)
0.26~0.30 N･m (2.5~3.0 kgf･cm)
0.26~0.30 N･m (2.5~3.0 kgf･cm)
0.26~0.30 N･m (2.5~3.0 kgf･cm)
4.1 General
4-6