Tait TM8000 Series User manual

TM8000 mobiles
TM8100 Mobile Radio
Service Manual
MM8100-02-00-812 Version 3.00
May 2004 © Tait Electronics Limited

2TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Contact Information
Tait Radio Communications http://www.taitworld.com
Corporate Head Office
New Zealand
Tait Electronics Ltd
P.O. Box 1645
Christchurch
New Zealand
E-mail (Sales): [e-mail]
Technical Support:
E-mail: [e-mail]
Website: http://support.taitworld.com
Tait Oceania
New Zealand
Tait Communications Ltd
E-mail: [email protected].nz
Australia
Tait Electronics (Aust) Pty Ltd
E-mail: [e-mail]
Tait Europe
Regional Head Office: United Kingdom
Tait Mo b i l e Radio L t d
E-mail: [email protected].uk
Latin America
Tait Latin Amer ica
E-mail: [e-mail]
Tait North America
Regional Head Office:
United States of America
Tait North America Inc
E-mail: [e-mail]
Canada
Tait North America Inc
E-mail: [e-mail]
Tait North Asia
Regional Head Office: Hong Kong
Tait Mobile Radio (Hong Kong) Ltd
E-mail: [e-mail]
Beijing
Tait Mobile Radio (Hong Kong) Ltd
E-mail: [e-mail]
Tait South Asia
Regional Head Office: Singapore
Tait Electronics (Far East) Pte Ltd
E-mail: [e-mail]
Thailand
Ta i t M o b i l e R a d i o L t d
E-mail: [e-mail]
Note
For the addresses and telephone numbers of
the above regional offices refer to the
TaitWorld website.

TM8100 Mobile Radio Service Manual 3
May 2004 © Tait Electronics Limited
Tait General Software Licence Agreement
This legal document is an Agreement between
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4TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Exclusion of Liability
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TM8100 Mobile Radio Service Manual 5
May 2004 © Tait Electronics Limited
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Scope of Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Summary of Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Enquiries and Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Updates of Manual and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Copyright. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Disclaimer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typographical Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Associated Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Publication Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
List of Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 1 Description of Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3 Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Chapter 2 Servicing of Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
5 Servicing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
6 Disassembly and Re-assembly of Radio . . . . . . . . . . . . . . . . . . . . . . 125
7 Servicing of Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
8 Servicing of Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
9 Diagnosis of Faults on Main Board . . . . . . . . . . . . . . . . . . . . . . . . . 171

6TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Preface
Scope of Service Manual
This manual provides information to service technicians for carrying out
level-1 and level-2 repairs of TM8100 mobile radios. Level-1 repairs
entail the replacement of faulty parts and circuit boards; level-2 repairs
entail the repair of circuit boards, with the exception of certain special
items on the boards. The manual does not cover level-3 repairs, which
entail the repair of the special items. The servicing procedures are
moreover limited to the control head and radio body of TM8100 mobile
radios. Servicing of all accessories associated with the radio is covered in
the accessories manual.
Summary of Service Manual
The service manual is divided into two chapters. A description of the
radio is given in Chapter 1. After an introductory section, an illustrated
parts breakdown is given for the radio. This is followed by a description
of the principles of operation of the radio and the functioning of the
circuitry.
The servicing procedures are given in Chapter 2. General information
is given first, followed by the full sequence of tasks required to service a
particular radio. The chapter concludes with additional details for
certain tasks, namely, disassembly and re-assembly of the radio, servicing
of the control head, general information on the servicing of the main
circuit board, and the diagnosis of faults on the main circuit board.

TM8100 Mobile Radio Service Manual 7
May 2004 © Tait Electronics Limited
Enquiries and Comments
Any enquiries regarding this manual or the equipment that it describes,
as well as any comments, suggestions and notifications of errors, should
be addressed by e-mail to Technical Support ([e-mail])
or to the Technical Support Manager, Tait Electronics Limited, PO Box
1645, Christchurch, New Zealand. Orders for this manual can be placed
with your Tait Dealer.
Updates of Manual and Equipment
In the interests of improving the performance, reliability or servicing of
the equipment, Tait Eletcronics Limited reserves the right to upgrade the
equipment or update this manual or both without prior notice.
Copyright
All information contained in this manual is the property of Tait
Electronics Limited. All rights are reserved. This manual may not, in
whole or in part, be copied, photocopied, reproduced, translated, stored,
or reduced to any electronic medium or machine-readable form,
without prior written permission from Tait Electronics Limited. All
trade names referenced are the service mark, trade mark, or registered
trade mark of the respective manufacturers.
Disclaimer
There are no warranties extended or granted by this manual. Tait
Electronics Limited accepts no responsibility for damage arising from use
of the information contained in the manual or of the equipment and
software it describes. It is the responsibility of the user to ensure that use
of such information, equipment and software complies with the laws,
rules and regulations of the applicable jurisdictions.

8TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Typographical Conventions
Conventions In this manual a special font is used for the names of certain hardware-
related and software-related elements. Details of these elements are given
in the tables below. The font used is Helvetica Narrow, with small
capitals for hardware-related and italics for software-related elements. In
essence this typographical convention is used to distinguish long or
cryptic names of elements from the ordinary text of the document.
Sequences of GUI
elements For indicating the selection of a sequence of GUI (graphical user
interface) elements, the convention illustrated by the following example
is applied: Select “Start” > “Programs” > “Tait Programming Applications” >
“TM8100 Programming Application” means: Select the “Start” menu, then
select the “Programs” option from the list that appears, then the “Tait
Programming Applications” option from the second list, and finally the
“TM8100 Programming Application” option from the third list that appears.
Hardware-related elements
Convention Usage Examples
“SMALL CAPS QUOTES”Labelled hardware
items and settings
Connect the cable to the “NODE”port.
Set the switch to the “TX/PTT” position.
SMALL CAPS Electrical signals Check the signal DIG CDC2 LRCK at pin 10 of
IC205.
Unlabelled hardware
items and settings
Remove the VCO TOP and SYN TOP cans.
Press the ON/OFF key.
Software-related elements
Convention Usage Examples
“Italics Quotes” Labelled GUI elements Note the values listed in the “AGC Delta Gain
Values” field.
Italics Unlabelled GUI elements
and displayed or typed text
Click the Close button.
The message node is not running is displayed.
Bold italics Variables in displayed or
typed text or GUI items
Enter the CCTM command 304 ccc, where
ccc is the DAC value of the clamp current.

TM8100 Mobile Radio Service Manual 9
May 2004 © Tait Electronics Limited
Alert notices Alert notices that appear in the manual are selected from whichever of
the following are appropriate. These alert notices are in accordance with
the ANSI definitions.
Warning!! This alert notice is used when there is a
potential risk of death or serious injury.
Caution This alert notice is used when there is a risk of
minor to moderate injury to people.
Important This alert notice is used to warn about the risk of
equipment damage or malfunction.
Note This alert notice is used to highlight information that is
required to ensure that procedures are performed correctly.

10 TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Associated Documentation
Basic manuals Together with this service manual, the following manuals are of concern
to service technicians. The pair of digits in the third field of the
document product code indicates the language of the document — 00
indicates an English and 03 a multi-lingual document.
MM8100-00-03-804
TM8100 mobile radio — User’s guide
MMAA00-00-00-812
TM8100 mobile radio — Accessories manual
PCB information
packages Information on the circuit boards is supplied in the following separate
documents. The information consists of the BOMs (bills of materials),
grid reference indexes, PCB layouts, and circuit diagrams.
MMAB12-B1-00-814
Main board (B1) — PCB information package
MMAB12-D1-00-814
Main board (D1) — PCB information package
MMAB12-H5-00-814
Main board (H5/H6) — PCB information package
MMAC20-00-00-814
Control-head board (two-digit display) — PCB information package
MMAC50-00-00-814
Control-head board (one-digit display) — PCB information package
3DK manuals The following manuals are mainly of concern to third-party developers.
The manuals are supplied in soft-copy form on a 3DK (third-party
developer’s kit) resource CD.
MMAA30-01-00-807
TM8000 3DK hardware developer’s kit — Application manual
MMAA30-02-00-429
TM8000 3DK application board — Software programmer’s manual
MMAA30-02-00-812
TM8000 3DK application board — Service manual
MM8100-00-00-441
TM8100 Computer-controlled data interface — Protocol definition

TM8100 Mobile Radio Service Manual 11
May 2004 © Tait Electronics Limited
Publication Record
Version Publication date Amended sections and pages
1.00 September 2003 First release — includes information for level-1
repairs only
2.00 March 2004 Second release — information for level-2 repairs
added
3.00 May 2004 Third release — information for TM8110 radio
and D1 band added

12 TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
List of Acronyms
3DK Third-party Developer’s Kit
ACP Adjacent Channel Power
ADC Analogue-to-digital Converter
AGC Automatic Gain Control
ALC Automatic Level Control
ASC Accredited Service Centre
BOM Bill of Materials
CCTM Computer-controlled Test Mode
CODEC Coder-decoder
CSO Customer Service Organisation
CTCSS Continuous-tone-controlled Subaudible Signalling
DAC Digital-to-analogue Converter
DSP Digital Signal Processor
DTMF Dual-tone Multi-frequency
ESD Electrostatic Discharge
FCL Frequency Control Loop
FE Front-end
FPGA Field-programmable Gate Array
GPS Global Positioning System
GUI Graphical User Interface
IPN Internal Part Number
IF Intermediate Frequency
IQ In-phase and Quadrature
ISC International Service Centre
LCD Liguid-crystal Display
LED Light-emitting Diode
LNA Low-noise Amplifier
LO Local Oscillator
LPF Low-pass Filter
PA Power Amplifier
PLL Phase-locked Loop
PTT Press-to-talk
RSSI Received Signal Strength Indication
SFE Software Feature Enabler
SMD Surface-mount Device
SMT Surface-mount Technology
SMPS Switch-mode Power Supply
SPI Serial Peripheral Interface
TCXO Temperature-compensated Crystal Oscillator
TEL Tait Electronics Limited
UI User Interface
VCO Voltage-controlled Oscillator
VCXO Voltage-controlled Crystal Oscillator

TM8100 Mobile Radio Service Manual Description of Radio 13
May 2004 © Tait Electronics Limited
TM8000 mobiles
Chapter 1
Description of Radio

14 Description of Radio TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Chapter 1 Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.1 TM8100 Mobile Radio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.2 Radio Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.3 Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1.4 Repair Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1.5 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
1.6 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.1 Illustrated Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.2 Architecture of Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2.3 Operation of Control-head Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2.4 Operation in Receive Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
2.5 Operation in Transmit Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3 Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.1 Control-head board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.2 Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.3 Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.4 Frequency Synthesizer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
3.5 Frequency Control Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3.6 CODEC and Audio Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
3.7 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
3.8 Interface Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

TM8100 Mobile Radio Service Manual Introduction 15
May 2004 © Tait Electronics Limited
1 Introduction
Scope of Section This section introduces the TM8100 mobile radio system. There are six
subsections covering the following aspects:
■introduction to items that make up system
■additional information on radio body
■additional information on control head
■repair levels that govern servicing of radio
■explanation of product codes for radio body and control head
■general specification for TM8100 radios
The radio body and control head are the principal items of the system
and are the prime concern of this service manual.
1.1 TM8100 Mobile Radio System
Main Items of System The TM8100 mobile radio system is a high-performance
microprocessor-controlled transceiver with a comprehensive range of
accessories. The system is designed primarily for installation in vehicles
but can also be used in desktop, remote-monitoring and similar
applications. The system consists of the following items:
■radio body
■control head
■audio accessories
■mounting for radio
■desktop power supply (optional)
Separate calibration and programming applications are used to calibrate
and program the radio. The service manual covers the servicing of the
radio body and control head only. The accessories manual covers
servicing of all the remaining items.
Radio Body The radio body contains the transmitter, receiver and microprocessor
circuitry. The radio body also allows for the fitting of an internal options
board to provide additional functions. There are three standard external
connectors on the radio body: an RF connector, power connector, and
auxiliary connector. If an internal options board is fitted, there might or
might not be an associated external options connector. The auxiliary
and external options connectors allow for the connection of various
external devices.

16 Introduction TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Figure 1.1 Illustrations of the TM8115 radio showing both the front and rear

TM8100 Mobile Radio Service Manual Introduction 17
May 2004 © Tait Electronics Limited
Control Head The control head is attached to the radio body. There is a choice of three
control heads:
■two-digit-display control head
■one-digit-display control head
■blank control head
The control heads with a display provide an interface with the radio user
and include a socket for the connection of a microphone. (Aside from
the number of characters displayed, there are no other differences
between these two control heads.) The blank control head has no UI
(user interface) but has a single external connector called the
programming connector; this is typically used for monitoring purposes.
For calibrating and programming the radio, the control head is connected
(via the microphone or programming connector as appropriate) to the
PC on which the calibration and programming applications are installed.
Designations The designation of the radio depends on which control head is attached
to the radio body:
■TM8115 : two-digit-display control head
■TM8110 : one-digit-display control head
■TM8105 : blank control head
Illustrations of the TM8115 radio are given in Figure 1.1 and illustrations
of the TM8110 and TM8105 in Figure 1.2.
Audio Accessories One or more audio accessories may be connected to the control head
and radio body. A microphone is the accessory usually required; other
accessories that are available are a handset, high-power remote speaker,
and hands-free kit. Various external devices may also be connected. The
user’s guide and accessories manual describe the audio accessories.
Installation Kits and
Desktop Power Supply The mounting hardware for the radio is in the form of a U-cradle. It is
supplied in an installation kit and provides for the installation of the radio
in a vehicle. Alternatively, the radio might be needed for desktop use, in
which case a desktop power supply is required. Tait desktop power
supplies include the parts needed to mount the radio. The user’s guide
and accessories manual describe the installation kit.
Block Diagrams
of System The block diagrams of Figure 1.3 to Figure 1.5 illustrate possible
configurations of the radio system. Figure 1.3 and Figure 1.4 show
example installations of the TM8110 or TM8115 radio in a vehicle and
on a desktop. Figure 1.5 shows an example of the TM8105 radio (with
blank control head) installed in a vehicle. Different audio accessories are
shown connected to the radio. The hands-free kit is connected to the
auxiliary connector, and the remote speaker to the power connector.
The accessories that may be connected to the microphone connector
include the rugged microphone, as well as a DTMF (dual-tone multi-
frequency) microphone, desktop microphone, and handset.

18 Introduction TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Figure 1.2 Illustration of the front of the TM8105 and TM8110 radios

TM8100 Mobile Radio Service Manual Introduction 19
May 2004 © Tait Electronics Limited
Figure 1.3 Block diagram of an example installation in a vehicle of a radio with a user interface
MICROPHONE
CONNECTOR
MICRO-
PHONE
HANGER
PLATE MOUNTING
CONTROL
HEAD RADIO BODY
RADIO SYSTEM
HANDS-
FREE
KIT
HIGH-
POWER
REMOTE
SPEAKER
POWER
CONNECTOR
AUXILIARY
CONNECTOR
EXTERNAL OPTIONS
CONNECTOR
RF
CONNECTOR
EXTERNAL
DEVICE
VEHICLE
BATTERY
FUSES
RF ANTENNA

20 Introduction TM8100 Mobile Radio Service Manual
May 2004 © Tait Electronics Limited
Figure 1.4 Block diagram of an example desktop installation of a radio with a user interface
MICROPHONE
CONNECTOR
HANDSET
OR
DESKTOP
MICRO-
PHONE
RADIO SYSTEM
DESKTOP POWER SUPPLY
CONTROL
HEAD RADIO BODY
POWER
CONNECTOR
AUXILIARY
CONNECTOR
EXTERNAL OPTIONS
CONNECTOR
RF
CONNECTOR RF ANTENNA
EXTERNAL
DEVICE
BACK-UP
BATTERY
AC MAINS