102 General Information TM9100 Service Manual
© Tait Electronics Limited August 2005
4.3 Servicing Precautions
Introduction This section discusses the precautions that need to be taken when
servicing the radios. These precautions fall into the following categories:
■ mechanical issues
■ compliance issues
■ anti-static precautions
■ transmitter issues
Service technicians should familiarize themselves with these precautions
before attempting repairs of the radios.
Use of Torque-drivers Apply the correct torque when using a torque-driver to tighten a screw
or nut in the radio. Under-torquing can cause problems with
microphonics and heat transfer. Over-torquing can damage the radio.
The illustrations in “Disassembly and Reassembly” on page 123 show
the correct torque values for the different screws and nuts.
Non-scratch Bench Tops Use workbenches with non-scratch bench tops so that the mechanical
parts of the radio are not damaged during disassembly and re-assembly.
(The workbench must also satisfy the anti-static requirements specified
below.) In addition, use a clear area of the bench when disassembling and
re-assembling the radio.
Note The radio is designed to satisfy the applicable compliance reg-
ulations. Do not make modifications or changes to the radio
not expressly approved by TEL. Failure to do so could invali-
date compliance requirements and void the Customer’s author-
ity to operate the radio.
Sealing of Radio To maintain the sealing of the radio to IP54 standards, ensure that all
bungs and seals are fitted after servicing the radio. These are for the
auxiliary, RF, external options, and programming connectors:
■ bung for auxiliary connector
■ rubber seal for RF connector
■ bung for aperture for options connector (connector not fitted)
■ cover seal for options connector (connector fitted)
In addition, ensure that the grommet sealing the aperture to the
microphone connector of the control head is properly fitted.
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