TM8100 Mobile Radio Service Manual Introduction 25
May 2004 © Tait Electronics Limited
1.4 Repair Levels
Introduction The repairs that can be carried out on the radio are grouped into
categories — or levels — of increasing complexity. This manual covers
two repair levels:
■ level-1 repairs
■ level-2 repairs
The repairs included at each level are defined below. The specific repair
skills and resources needed for each repair level are discussed in Chapter
2. By resources is meant tools and equipment, spares kits, and the type
of access to the TaitWorld website.
Level-1 Repairs There are three types of level-1 repair:
■ replacement of control-head board
■ replacement of main-board assembly
■ replacement of other parts
The last-named parts include the connectors and volume-control
potentiometer on the control-head board, but not the connectors on the
main board.
Level-2 Repairs There are two types of level-2 repair:
■ repair of control-head board
■ repair of main-board assembly, excluding special items
These repairs entail the replacement of faulty SMT (surface-mount
technology) components on the boards, as well as the connectors on the
main board. The special items are the digital board and certain
components on the main board; the details are given in Chapter 2.
(Repairs of the special items are level-3 repairs.)
Service Centres The service centres that carry out repairs of the radios can be divided into
three categories:
■ Dealers and Customers with appropriate facilities
■ ASCs, including CSOs (Customer Service Organisations)
■ TEL and ISC
ASCs (accredited service centres), the ISC (International Service Centre)
and TEL (Tait Electronics Limited) may carry out both level-1 and
level-2 repairs. These are moreover the only service centres that may
repair a radio that is still under warranty — any repair by a non-
accredited service centre will void the warranty. After the expiry of the
warranty, Dealers and Customers with appropriate facilities may also
carry out level-1 repairs, but are strongly advised not to attempt level-2
repairs. Details of the process by which service centres may achieve
accreditation are given in Chapter 2.
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