8
Safety and Servicing Information
Midian Encryption Programming and Service Manual
June 2006 © Tait Electronics Limited
Screw Types
The TM8000 and TOP radios documented in this manual may have any of
the following screw types used. For full disassembly instructions, see the
relevant service information.
Torx Recess Head Screws
Torx recess head screws are the standard type of screw used in Tait
equipment, although Pozidriv and Allen recess head screws are also used in
a few special applications.
The diagram below shows a typical Torx recess head screw (actual hardware
may differ slightly from this illustration due to variations in manufacturing
techniques).
Pozidriv Recess Head Screws
Pozidriv recess head screws are used in Tait equipment in a few special
applications. It is important that you use the correct type and size
screwdriver to avoid damaging the screw head.
It is particularly important that you do not use Philips screwdrivers on
Pozidriv screw heads as the tapered driving flutes of the Philips screwdriver
do not engage correctly with the parallel-sided slots in the Pozidriv screw
head. This can result in considerable damage to the screw head if the
screwdriver tip turns inside the recess.
Note
If you find you need excessive downwards pressure to keep the
screwdriver tip in the Pozidriv screw head, you are probably using
the wrong type or size screwdriver.
“star” shaped recess with
six internal notches
