4.11 USB Board
Colors of Screw Shanks
For easy identification of the correct screws, the screw shanks are colored according to their
lengths, as follows:
Screws of an odd-numbered length Blue
Screws of a special length
Screws of a special length are those of a length having decimal places (i.e. 16mm).
Symbols of Screws on the Laptop Body
For easy maintenance, the screw types are shown on the laptop body as symbols. A symbol
consists of a letter representing the screw type and a numeral representing the screw length.
Screw type
Bind screw
Flat-head screw
Super flat-head screw
Tapping screw
Other screws
Symbol examples
6 mm bind screw
12 mm bind screw
5 mm stud
(The numeral represents the rounded length of the threaded portion regardless of the
entire stud length.)
Black
Letter
B
(stands for bind)
F
(stands for flat-head)
S
(stands for super flat-head)
T
(stands for tapping)
U
(stands for unique-pan head screws, studs, etc.)
B6
B12
U5
[CONFIDENTIAL]
Satellite L670D/L675D/Pro L670D Maintenance Manual
4 Replacement Procedures