T2000/T2004 Multi Head System For T2020 T2040 Radios/T2004 Radios T2004

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T2000 mobiles

T2004 Multi Control Head

System Manual

M2004-00-000-814

May 2004 © Tait Electronics Limited

2T2004 Multi-Control Head System 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 (Marketing): taitnet@taitworld.com

E-mail (Sales): sales@taitworld.com

Technical Support

Technical Support Manager

Tait Electronics Ltd

P.O. Box 1645

Christchurch

New Zealand

Telephone: (64) (3) 358-3399

Facsimile: (64) (3) 358-6486

E-mail: support@taitworld.com

Oceania

New Zealand

Tait Communications Ltd.

E-mail: headoffice@tcl.tait.co.nz

Australia

Tait Electronics (Aust) Pty Ltd.

E-mail: australia@taitworld.com

Tait Europe

Regional Head Office - United Kingdom

Tait Mobile Radio Ltd.

E-mail: teusales@tait.co.uk

Tait North America

Regional Head Office - Canada

Tait North America Inc.

E-mail: canada@taitworld.com

United States of America

Tait North America Inc.

E-mail: usa@taitworld.com

Latin America

Tait Latin America

E-mail: latinamerica@taitworld.com

Tait North Asia

Regional Head Office - Hong Kong

Tait Mobile Radio (Hong Kong) Ltd.

E-mail: hongkong@taitworld.com

Beijing

Tait Mobile Radio (Hong Kong) Ltd.

E-mail: beijing@taitworld.com

Tait South Asia

Regional Head Office - Singapore

Tait Electronics (Far East) Pte. Ltd.

E-mail: singapore@taitworld.com

Thailand

Tait Mobile Radio Ltd.

E-mail: thailand@taitworld.com

T2004 Multi-Control Head System Manual 3

Contents

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Scope of Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Enquiries and Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Associated Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Updates of Manual and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Publication Record. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Part A System Information

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.1 Document Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.1 System Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.2 System Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.3 System Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.4 System Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3 System Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4 System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5 System Equipment Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1 Multi-Drop Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2 Micromatch to RJ45 Cable (IPN 219-02900-00) . . . . . . . . . . . . . . . . . . . 23

5.3 RJ45 Wallbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.4 DC Power and Speaker connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6 System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 System Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4T2004 Multi-Control Head System Manual

Part B T2004 Control Heads

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1.1 The T2004 Control Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

1.3 Product Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3 Functionality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.1 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4 I/O Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.1 J6: Power and Speaker Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.2 J5: 8way Micromatch Socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.3 S10: 6way RJ Socket (Microphone) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5 Assembly/Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.1 Mechanical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.2 Disassembling the Control Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6 X2H2xx PCB Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.1 X2H221 Rev 007 Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.2 X2H221 Rev 007 Grid Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.3 228-23722-02 PCB Top Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.4 228-23722-02 PCB Bottom Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

6.5 X2H221- PCB Circuit Diagram (page 1 of 1) . . . . . . . . . . . . . . . . . . . . . 55

7 Testing the X2H2xx control heads . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Part C X2AM01 Radio Interface

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

1.1 The X2AM01 Multi-Head Radio Interface PCB . . . . . . . . . . . . . . . . . . . 60

2 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

T2004 Multi-Control Head System Manual 5

3 I/O Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3.1 SK1: 8 Way Micromatch Socket to Radio . . . . . . . . . . . . . . . . . . . . . . . . 62

3.2 SK3: 8 Way Micromatch Socket to Control Heads . . . . . . . . . . . . . . . . . . 62

4 Fitting PCB into Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

5 X2AM01 Multi-Head Radio Interface PCB . . . . . . . . . . . . . . . . . . . . . 65

5.1 X2AM01 Rev 008 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

5.2 X2AM01 Rev 008 Grid Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

5.3 228-23721-01 PCB Top Side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

5.4 228-23721-01 PCB Bottom Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

5.5 X2MA01 PCB Circuit Diagram (page 1 of 1). . . . . . . . . . . . . . . . . . . . . . 72

6 Testing the X2AM01 radio interface . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual 7

Preface

Scope of Manual

This manual contains general and technical information about the T2004

Multi-Control Head system for use with a T2000 radio.

All information contained in this manual is the property of Tait Electronics

Ltd. 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, trademark or registered trademark of the respective

manufacturers.

Disclaimer

There are no warranties extended or granted by this manual. Tait

Electronics Ltd 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.

Enquiries and Comments

If you have any enquiries regarding this manual, or any comments,

suggestions and notifications of errors, please contact Customer Support,

Tait Electronics Ltd, Christchurch, New Zealand (refer to “Contact

Information” on page 2).

Associated Documentation

T2004 Multi-Control Head Installation Manual M2004-00-000-315

8T2004 Multi-Control Head System Manual

Updates of Manual and Equipment

In the interests of improving the performance, reliability or servicing of the

equipment, Tait Electronics Ltd reserves the right to update the equipment

or this manual or both without prior notice.

Publication Record

Issue Publication Date Description

0 April 2004 new manual

T2004 Multi-Control Head System Manual 9

Part A System Information

This part provides general information about the TM8000 , and

describes how to install and operate the

system.

The following topics are covered in this part:

■Section 1 Introduction

■Section 2 System Overview

■Section 3 System Installation

■Section 4 System Operation

■Section 5 System Equipment Specifications

■Section 6 System Testing

■Section 7 System Fault Finding

10 T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Introduction 11

1 Introduction

1.1 Document Navigation

System Manual

This System Manual is divided into three parts.

■Part A provides general information about the system, how the

components are connected together, system installation and operation

instructions, and specifications for equipment in the system, excluding

the control heads and radio.

■Part B provides technical information about the control heads, including

a circuit description, PCB layout and circuit diagram, and testing

information.

■Part C provides technical information about the Radio Interface PCB,

including a circuit description, PCB layout and circuit diagram, and

testing information.

Control Head/Radio User Guide

Installation and operation instructions included in Part A of the System

Manual provide instructions unique to this system. For more detailed

operation instructions, refer to the user guide.

Radio Service Manual

The System Manual does not contain information about the T2020 or

T2040 radio used with the system. For information about the radio, refer to

the T2000 Series II Service Manual (M2000-00-301).

12 Introduction T2004 Multi-Control Head System Manual

1.2 Product Codes

The T2004 Multi-Control Head system replaces the STA6682 Multi

Control Head system, previously manufactured by Tait Communications

Ltd. (TCL).

Note The T2004 is not compatible with existing STA6682 heads or

interface boards.

The table below provides the product numbers for both systems.

Product Code Description TCL Code

T2004-A20 T2020 Primary Multi-Control Head Kit

T2004-A21 T2020 Secondary Multi-Control Head Kit

T2004-A40 T2040 Primary Multi-Control Head Kit

T2004-A41 T2040 Secondary Multi-Control Head Kit

X2H221 T2020 Primary Control Head only STA6682-4H

X2H222 T2020 Secondary Control Head only STA6682-4H

X2H241 T2040 Primary Control Head only STA6682-4H

X2H242 T2040 Secondary Control Head only STA6682-4H

X2AM01 T2020/40 Multi-Control Head Radio Interface PCB STA6682-1H

T2004 Multi-Control Head System Manual System Overview 13

2 System Overview

The T2004 Multi-Control Head system allows the use of between one and

five control heads with a single T2020 or T2040 radio. The control heads

are configured as one Primary and up to four Secondary. The Primary

control head is the only one which controls the radio’s power, as well as

power to each Secondary control head, otherwise the functionality of all the

control heads is the same. Advantages: radio to control head length able to

be greater than the standard 6m cable.

The Multi-Control Head system consists of two kits, designed to connect to

your existing Series II T2020 or T2040 radio and T2008 power supply:

■the T2004-A20 (T2020) or the T2004-A40 (T2040) Primary Multi-

Control Head Kit (one required per system).

■the T2004-A21 (T2020) or T2004-A41 (T2040) Secondary Multi-

Control Head Kit (not required if only one control head is used in the

system).

The T2004-A20 or T2004-A40 Primary Head Kit provides the Primary

control head as well as the Radio Interface PCB. This PCB is housed inside

a dummy (Clayton’s) control head and replaces the standard control head on

the radio. The radio can be concealed if required, as all radio controls are

now done via the Primary control head.

The T2004-A21 or T2004-A41 Secondary Head Kit provides one

Secondary control head and other equipment needed to install the control

head for use with the radio.

14 System Overview T2004 Multi-Control Head System Manual

Each control head can be installed anywhere on a multi-drop line up to

2000m long (not included), and is powered locally by a mains-operated DC

plug pack. A speaker plugs into each control head to provide local Tx and

Rx audio.

Note The DC Plug pack is not supplied as part of the kit. The correct

plug pack for each country can be ordered separately as per the

table on page 18.

The control heads provide the same functionality as the standard T2000

control head, but will not provide for a DTMF module to be fitted. In

addition, the control heads provide some extra functions:

■Global Mute

The Global Mute function is provided to avoid the possibility of

audio feedback when two or more control heads are placed in close

proximity. This function is individually selectable on each control

head, via a link JP1 on the control head PCB. Refer to Part B, Con-

trol Head for further information.

■Power Switch Selection

The Power Switch Selection function is provided so that only one

control head in the system (the Primary control head) is able to con-

trol the system’s power. This function is selectable by the fitting of a

jumper (JP2) on the control head PCB of the Primary control head.

Refer to Part B, Control Head for further information.

2.1 System Specifications

General Specifications

Radios supported Series II T2020 and T2040 radios

Possible number of control heads Between one and five

Control head DC supply & speaker connector Phoenix MCV 1,5/4-G-3,81 4 way jack

Control head DC supply voltage (at 800mA) +13.8V nominal

+10.8V minimum

+16.0V maximum

Balanced line Audio levels -10dBm for receiver audio

-15dBm for transmitter audio

Control head dimensions Standard T2000 control head dimensions

Recommended cable 4 x twisted pair with overall screen

T2004 Multi-Control Head System Manual System Overview 15

2.2 System Diagram

16 System Overview T2004 Multi-Control Head System Manual

2.3 System Equipment

The Multi-Control Head system includes the following components:

■one T2020 or T2040 radio with T2008 power supply unit (existing)

■2km maximum Multidrop Line (not supplied)

■one T2004-A20 or T2004-A40 Primary Multi-Control Head Kit

■between one and four T2004-A21 or T2004-A41 Secondary Multi-

Control Head Kit (optional)

T2004-A20 and T2004-A40 Primary Multi-Control Head Kit Parts

The T2004-A20 or T2004-A40 Primary Multi-Control Head Kit are listed

below:

This kit provides the Primary control head as well as the Radio Interface

PCB. This PCB is housed inside a dummy (Clayton’s) control head and

replaces the standard control head on the radio. The radio can be concealed

if required, as all radio controls are now done via the Primary control head.

Qty IPN Description

1 X2H221 or X2H241 T2020 or T2040 Primary Control Heada

a. For more information about the X2H221 or X2H241 Primary Control Head, see Part

B of this manual.

1 X2AM01 T2020/40 Multi-Control Head Radio Interfaceb

b. For more information about the X2AM01 T2020/40 Multi-Control Head Radio Inter-

face board, see Part C of this manual.

2 219-02900-00 Micromatch to RJ45 cable

2 240-04051-00 RJ45 Screw Terminal Wallbox

2 349-00010-33 Screw, #6*3/4: S/T P/P (bracket to wall)

4 349-00010-22 Screw, 4-20x3/8 P/P Trilb-P BZ (dummy head to radio)

1 316-06433-02 Dummy (Clayton’s) control head

1 316-85125-00 T2000 Plate cover

1 219-02907-00 Power/ Speaker cable (no plug pack)

1 M2004-00-000-315 Installation manual

1 252-00010-49 Microphone clip

1 302-05211-00 Head mounting bracket

2 350-01007-00 Head thumb screws

4 360-01057-00 Screw hole covers

T2004 Multi-Control Head System Manual System Overview 17

A speaker and microphone are not provided as part of the Primary Multi-

Control Head Kit, as the Primary control head uses the speaker and

microphone already supplied with the radio.

T2004-A21 and T2004-A41 Secondary Multi-Control Head Kit Parts

The T2004-A21 or T2004-A41 Secondary Multi-Control Head Kit parts

are listed below:

This kit provides one Secondary control head and other equipment needed

to install the control head for use with the radio. Between one and four

Secondary Multi-Control Head Kits can be installed as part of your system.

Each control head can be installed anywhere on a multi-drop line up to

2000M long, and is powered locally by a mains-operated DC plug pack. A

speaker plugs into each control head to provide local Rx audio and Tx audio

from other control heads in the system.

Qty IPN Description

1 X2H222 or X2H242 T2020 or T2040 Secondary Control Heada

a. For more information about the X2H222 or X2H242 Secondary Control Head, see

Part B of this manual.

1 219-02900-00 Micromatch to RJ45 cable

1 240-04051-00 RJ45 Screw Terminal Wallbox

2 349-00010-33 Screw, #6*3/4: S/T P/P (bracket to wall)

1 005-00000-40 T2000 Speaker Kit (incl. mount)

1 252-00010-76 T2000 microphone

1 219-02907-00 Power/ Speaker cable (no plug pack)

1 M2004-00-000-315 Installation manual

1 252-00010-49 Microphone clip

1 302-05211-00 Head mounting bracket

2 350-01007-00 Head thumb screws

18 System Overview T2004 Multi-Control Head System Manual

DC Plug packs for powering multi -control heads

Each multi-control head requires a separate DC plug pack. This is not

supplied as part of the kit because the exact plug pack requirements differ

between countries.

With each T2004 multi-control head kit you can order one of the following

plug packs

Order Code Input Voltage Country

T952-012 230V Australia/ New Zealand

T952-022 230V United Kingdom

T952-032 230V Europe

T952-042 110V United States of America

T2004 Multi-Control Head System Manual System Overview 19

2.4 System Connections

Each control head connects to the system network via the Micromatch to

RJ45 Cable, which plugs into the RJ45 Wallbox. The RJ45 Wall boxes are

fitted at intervals along a multi-drop cable.

The radio also connects to the system network via the Micromatch to RJ45

Cable, which plugs into the X2AM01 Multi-Head Radio Interface. The

other end of the cable plugs into an RJ45 Wallbox, which is fitted at one

end of the multi-drop cable. See system diagram earlier for block overview

of system.

20 System Installation T2004 Multi-Control Head System Manual

3 System Installation

The T2004 Multi-Control Head Installation Manual M2004-00-000-315

should be referred to for the installation process.

T2004 Multi-Control Head System Manual System Operation 21

4 System Operation

The primary control head provides the same user functionality as the

original T2020/T2040 control head, including the On/Off power control

to the entire multi-head system.

The Secondary control heads have the same functionality except for the

On/Off power control. The power switch is disabled in the Secondary

heads, because only one control head (Primary) can provide system power

On/Off control.

Secondary control heads can not be individually powered off.

Note The DC plug pack for the Secondary head should be connected

to a 24-hour mains outlet in order for the Secondary heads to

always function correctly. Display errors will occur if power is

removed and replaced without resetting the radio via the Primary

head. Secondary heads have a programmed delay of 10 seconds

from initial power on, where key presses will not be actioned.

22 System Equipment Specifications T2004 Multi-Control Head System Manual

5 System Equipment Specifications

5.1 Multi-Drop Cable Specifications

Note This cable is not supplied by TEL as part of the Multi-Control

Head system.

The Multi-Drop Cable is a 4x twisted pair overall screen cable (Cat5 or

similar) which is used for cabling within the building. The length of this

cable can be a maximum of 2000M.

The recommended cable type used for the multi-drop cable is M&M cables

b2004 ESCS 4 x twisted pair/overall screen.

RJ45 Wall boxes are fitted at intervals along this multi-drop cable, which

provide the junction between the remote control heads and connection to

the building network.

T2004 Multi-Control Head System Manual System Equipment Specifications 23

5.2 Micromatch to RJ45 Cable (IPN 219-02900-00)

The Micromatch to RJ45 Cable is the means by which the radio and control

heads connect to the building network.

The cable connects the radio at SK3 on the X2AM01 Multi-Head Interface

PCB to the radio’s RJ45 Wallbox. The cable connects each control head at

J5 to the corresponding RJ45 Wallbox.

The table below shows the pin assignment for the RJ45 cable which

connects to the wallboxes:

Pin Colour Description

1 Black Data from radio 1B

2 Brown Data from radio 1A

3 Red Ground

4 Orange Balanced audio

5 Yellow Balanced audio

6 Green Power switch

7 Blue Data to radio 2B

8 Violet Data to radio 2A

24 System Equipment Specifications T2004 Multi-Control Head System Manual

5.3 RJ45 Wallbox

Wall boxes are connected in a multi drop arrangement (i.e. all wiresare

connected in parallel), with one wallbox for each control head and one

wallbox for the radio. View below of the RJ45 Wallbox terminals is from

the top.

The following pins should be paired:

■Power Switch line and Ground

■Audio

■Data 1A & 1B

■Data 2A & 2B

Note Polarity of the data pairs is important. Earthing of the cable screen

should only occur at the radio interface wallbox.

Note Some Cat 5 cable installations (normally used for network or

PABX connection) have pin reversal on some or all pins. Check

connection polarities if control heads do not function as expected.

T2004 Multi-Control Head System Manual System Equipment Specifications 25

5.4 DC Power and Speaker connections

The control head is connected to the external speaker and the DC plug pack

via the 219-02907-00 Multi-head DC power cable.

Quantity IPN Description

300mm 201-00030-10 Wire T/C 7/0.2mm Pvc Blk

1 meter 205-00010-03 Cable twin cycle 2/7/0.2mm black

1 240-02011-35 Connector 4w Phoenix MCV 1,5/4-G-

3,81 4 way jack

1 240-04021-63 Connector 2w 24awg black inline

1 356-00010-05 Tag Solder 4mm long M6144/4.2

26 System Equipment Specifications T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual System Testing 27

6System Testing

Install all interface boards, control heads and components as per the

installation guide (IPN M2004-00-100-315).

Power up all control heads, followed by the radio. Check the Primary

control head causes the radio and all heads to power on and off.

Check all control heads show the same information in the LCD

Check all control heads keypad functionality.

Note Secondary head user input is disabled for 10 seconds after power

on.

Check transmit and receive audio functionality from all control heads. The

radio should function normally from each control head.

If Global mute is enabled check the following

■All control heads have audio when all mics are on hook (Hang up stud is

earthed)

■When one microphone is lifted off hook the audio remains enabled for

that head and all other heads are muted.

■When a microphone is off hook in the system, check that lifting another

microphone off hook enables audio for that head.

Verify the radio can be read/ programmed by a computer connected to any

remote head.

28 System Fault Finding T2004 Multi-Control Head System Manual

7 System Fault Finding

Problem

System will not power up, all heads appear dead.

Suggestion

■Check radio has power connected and two micromatch connectors on

the interface board are not reversed.

■Check pin 1 of interface board SK3 appears at J5 pin 1 at control heads.

SK3 pin 2 connects to J5 pin 2 etc.

■Check for 13.8V at control heads.

■Check Primary head is correctly fitted and turned on.

Problem

System will not power off.

Suggestion

■Check all multi-drop wiring for shorts or faults.

■Check only one Primary head is installed.

Problem

Head displays information but keypad, mic, etc. are dead.

Suggestion

■This happens for ten seconds after power up on Secondary heads only.

■If condition is permanent check data pair 2A/2B paying attention to

polarity.

Problem

Transmit/ Receive audio is very quiet.

Suggestion

Check for cable losses or faults. Max multi drop line length is 2km.

T2004 Multi-Control Head System Manual System Fault Finding 29

Problem

Transmit/ Receive audio is excessively noisy.

Suggestion

■Confirm radio is OK by removing multi-drop network and connecting

a Primary control head directly to the interface board SK3.

■If problem is in the network, check for cable faults, remove noise sources

or re-route cable away from noise sources.

■Ensure mic clip is isolated from metal work to avoid earth loops.

Problem

Global mute is not functioning.

Suggestion

■Check JP1 is fitted in the control head.

■Check microphone clip is correctly earthed.

Problem

Control head only shows 2372A510 on power on or all digits and LEDs

flash.

Suggestion

■One of the keys on the keypad is stuck down.

■Keypad PCB has become contaminated with chemicals or liquids.

30 System Fault Finding T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual 31

Part B T2004 Control Heads

This part provides general and technical information about the

T2020 and T2040 Primary and Secondary control heads used in

the T2004 Multi-Control Head system.

The control heads covered in this section are:

■X2H221 T2020 Primary Control Head

■X2H222 T2020 Secondary Control Head

■X2H241 T2040 Primary Control Head

■X2H242 T2040 Secondary Control Head

The following topics are covered in this part:

■Section 1 Introduction

■Section 2 Circuit Description

■Section 3 Functionality

■Section 4 I/O Connections

■Section 5 Assembly/Disassembly Instructions

■Section 6 X2H2xx PCB Information

■Section 7 Testing the X2H2xx control heads

32 T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Introduction 33

1 Introduction

1.1 The T2004 Control Heads

The T2004 Multi-Control Head system allows the use of between one and

five control heads with a single T2020 or T2040 radio. The control heads

are configured as one Primary and up to four Secondary. The Primary

control head is the only one which controls the radio’s power, as well as

power to each Secondary control head, otherwise the functionality of all the

control heads is the same.

1.2 Features

The remote control heads provide the same functionality as the standard

T2000 control head, except it does not provide for a DTMF module to be

fitted. If DTMF dialling capability is required, a T2000-A07 DTMF

microphone is required.

In addition, the remote control heads provide two extra functions:

■Power Switch Selection (Primary/ Secondary mode selection

■Global Mute

Power Switch Selection

The Power Switch Selection function is provided so that only one control

head in the system (the Primary head) is able to control the system’s power.

This function is selectable by the fitting of a jumper (JP2) on the control

head PCB of the Primary head. This is factory fitted by default.

Only the Primary head should have JP2 fitted. The system will not power

on correctly if more than one control head in the system has this jumper

fitted.

Global Mute

The Global Mute function is provided to avoid the possibility of audio

feedback when two or more control heads are placed in close proximity (for

example, within the same room or the same vehicle). The Global Mute

function is individually selectable on each control head, via a link on the

control head PCB. This is factory fitted by default.

If a control head has this jumper fitted, its speaker will only unmute when

the microphone is taken off hook (i.e. to answer or make a call). All other

34 Introduction T2004 Multi-Control Head System Manual

control heads with the global mute function enabled will mute their

speakers. If all microphones are on-hook then all the speakers will unmute

when a call is received. A user shall be able to join a conversation by picking

up the microphone. This will unmute the speaker audio at that control head.

With Global Mute disabled (i.e. the jumper is not fitted), received audio is

present at all control heads, and transmit audio is heard at all heads except

the head that is transmitting.

Not all control heads in the system must be set to the same Global Mute

setting. For example:

■Where a despatcher station has two control heads in the same room, both

heads would need Global Mute enabled to avoid audio feedback.

■Where a supervisor may have a control head installed in their office, and

wants to hear all incoming and outgoing traffic, Global Mute would not

be enabled. Note that in this example, outgoing transmit audio from this

control head would be heard at the despatcher’s station heads.

General Specifications

Radios supported Series II T2020 and T2040 radios

Possible number of control heads Between one and five

Control head DC supply & Speaker connector Phoenix MCV 1,5/4-G-3,81 4 way jack

Control head DC supply voltage (at 800mA) +13.8V nominal

+10.8V minimum

+16.0V maximum

Balanced line audio levels Preset to -10dBm for receiver audio

Preset to -15dBm for transmitter audio

Control head dimensions Standard T2000 control head dimensions

T2004 Multi-Control Head System Manual Introduction 35

1.3 Product Codes

Product Code Description TCL Code

T2004-A20 T2020 Primary Multi-Control Head Kit

T2004-A21 T2020 Secondary Multi-Control Head Kit

T2004-A40 T2040 Primary Multi-Control Head Kit

T2004-A41 T2040 Secondary Multi-Control Head Kit

X2H221 T2020 Primary Control Head only STA6682-4H

X2H222 T2020 Secondary Control Head only STA6682-4H

X2H241 T2040 Primary Control Head only STA6682-4H

X2H242 T2040 Secondary Control Head only STA6682-4H

X2AM01 T2020/40 Multi-Control Head Radio Interface PCB STA6682-1H

36 Circuit Description T2004 Multi-Control Head System Manual

2 Circuit Description

This section provides circuit information for the T2004 Primary and

Secondary control heads as shown in the X2H2xx control head block

diagram.

Audio

An internal power amplifier drives a speaker connected to the control head

for local audio.

The PCB provides a 600 Ohm interface for both the Tx and Rx audio.

A microphone amplifier/ compressor followed by a line driver stage outputs

microphone audio to the balanced line.

Microphone

The standard T2000-A02 microphone is used.

T2004 Multi-Control Head System Manual Circuit Description 37

Power

The control head is supplied with 13.8V from an AC to DC plug pack.

The remote power switch line J5-3 (controlled by the Primary control head)

controls the 5V regulators on the Secondary heads and interface board.

Data

A separate RS-485 transmitter and receiver in each control head provide the

data communications between the radio and control heads.

Connections

Connection to the remote control heads is via the micromatch to RJ45 cable

at J5, which connects to the RJ45 Wallbox. The wallbox connects to the

multi-drop cable, which connects to the RJ45 Wallbox for each control

head and the radio.

DC Input and speaker output is via a 4 way phoenix connector at J6. The

supplied cable 219-02907-00 connects to J6. The plug pack (supplied

separately) connects to this cable assembly.

The DC input is polarity protected so that in the event of reverse polarity

being applied the head will not function, no damage will occur.

38 Functionality T2004 Multi-Control Head System Manual

3 Functionality

3.1 Software

Software version 2372A510 is programmed into the microprocessor on all of

the remote control heads.

The software allows the remote control heads to work in the same way as

standard T2000 control heads, with additional features detailed below.

Primary Secondary Configuration

The control head design is altered to allow a system of multiple heads to

function with one radio. The heads are divided into Primary and Secondary

via hardware, i.e. by linking a port bit on the head processor (Secondary =

high, Primary = low). Only one Primary is possible per system.

RS485

The serial line driver in each head feeds its output to a common serial line

back to the radio. This raises the problem of multiple devices trying to drive

one line. To overcome this, the RS485 line drivers are held in a tri-state

condition until the head generates serial data. Hardware on the circuit board

enables the driver at the appropriate time. The radio can still be programmed

from a PC via any head.

Avoiding Data Clashes

The heads share a common serial data link with the radio, so in order to

overcome data clashes at power up time, Secondary heads have a 10 second

timeout during which all user input and all serial output is stopped. After

the timeout, normal operation resumes.

Note that there is no mechanism to prevent data clashes during normal

operation; the system must rely on the probability of a clash being very

small.

Controlling the Speaker Path

Muting the speaker output of one head by another head is accomplished in

hardware by phantoming a DC control signal onto commonly connected

audio lines which link all heads in the group. This line can be either driven

or its state sensed by the head microprocessor and the audio output is

T2004 Multi-Control Head System Manual Functionality 39

controlled accordingly. This is enabled by fitting JP1, for the Global Mute

feature.

In order to accomplish this, some I/O lines of the microprocessor have been

reassigned to new functions. The control of the audio output is based on a

truth table that uses the state of the PTT, Hook and Line Sense inputs as its

control elements.

The audio truth table is shown below.

Scenario

(All heads in this

condition)

JP1

(In = Global

Mute Active)

PTT

(0= Active i.e

Transmitting)

Hook

Switch

(1= On hook)

Global Mute

Line Drive

(1= mute other heads)

Global

Mute Line

Sense

(1= activate mute)

Spkr

Mute

(1=mute active

i.e.no audio)

Comment

On hook, no

Rx audio

IN110 0 0

On hook, no

Rx audio

OUT110 0 0

On hook, Rx

audio

IN 1 1 0 0 0 Everyone can hear

audio

On hook, Rx

audio

OUT 1 1 0 0 0 Everyone can hear

audio

Off hook

(local)

IN 1 0 1 1 0 Only local head has Rx

audio

Off hook

(local)

OUT 1 0 0 1 0 Because jumper is out,

line drive does not

affect other heads

Off hook

(remote)

IN110 1 1 Everyone else muted

Off hook

(remote)

OUT 1 1 0 0 0 Hear everything

Off hook

(local+remote)

IN 1 0 1 1 0 Everyone off hook

hears audio

Off-hook

(local+remote)

OUT 1 0 0 1 0 Hear everything

PTT (local) off

hook

IN011 1 1 Mute local

PTT (local) off

hook

OUT010 1 1 Mute local

PTT (local) on

hook

IN 0 1 1 1 1 All muted

PTT (local) on

hook

OUT 0 1 0 1 1 Mute local but no-one

else

PTT (remote)

on hook local

IN 1 1 0 1 1 Mute local (same as

‘Off hook remote’)

PTT (remote)

on hook local

OUT 1 1 0 1 0 Hear everything

PTT (remote)

off hook local

IN 1 0 1 1 0 Hear everything

PTT (remote)

off hook local

OUT 1 0 0 1 0 Hear everything

40 I/O Connections T2004 Multi-Control Head System Manual

4 I/O Connections

This section describes the I/O connections on the board.

4.1 J6: Power and Speaker Connector

J6 on the rear panel of the control head provides connections for power,

speaker and microphone clip ground. The connector provides screw

terminals for fitting the microphone clip earth wire and speaker wires.

T2004 Multi-Control Head System Manual I/O Connections 41

4.2 J5: 8way Micromatch Socket

4.3 S10: 6way RJ Socket (Microphone)

Pin Signal Description

1 Tx Data 2A Data to radio A

2 Tx Data 2B Data to radio B

3 Pwr Sw Remote power switch, low = power on

4 Audio Balanced audio line

5 Audio Balanced audio line

6 Gnd Common ground

7 Rx Data 1A Data from radio A

8 Rx Data 1B Data from radio B

Pin Signal Description

1 +13V8 Low current supply for programming interface

2 TXD Data from radio to computer

3 PTT low = transmit condition

4 MIC Microphone audio

5 GND Common ground

6 RXD Data from computer to radio

42 Assembly/Disassembly Instructions T2004 Multi-Control Head System Manual

5 Assembly/Disassembly Instructions

This section provides mechanical parts information and disassembly

instructions for the control heads.

5.1 Mechanical Parts

The T2004 Multi-Control Head includes the following mechanical parts.

Please use the IPN number and description when ordering replacement

parts.

Note All PCB and cable components are specified separately. For infor-

mation for these items, refer to the sections listed below:

■For PCB information, refer to Section 6, “X2H2xx PCB

Information”.

■For external cable information, refer to Part A, Section 5, “System

Equipment Specifications”.

Item Description IPN Qty

1 Knob A3M2530 T2K SII 311-01042-01 1

2 Microphone with Grommet 252-00010-76 1

3 Panel Frt Scrn T2020/40/50 SII 316-06430-02 1

4 Volume Pot Nut part of 040-05100-20 1

5 Volume Pot Washer part of 040-05100-20 1

6 LCD Display 008-02029-00 1

7 Lightspreader 20 Bttn T2K SII 304-07036-02 1

8 Keypad SII International 311-03076-01(T2020) 311-03078-01(T2040) 1

9 Volume Pot 040-05100-20 1

10 Pot PCB part of 228-23722-xx 1

11 Microphone Connector 240-04021-61 1

12 Lens LCD Display T2K FM2/TR2 312-01046-05 1

13 Control Head PCB 228-23722-xx 1

14 Screw 4-20x3/8 P/P Trilobe-P BZ (Control Head Screws) 349-00010-22 2

15 Back Panel 316-02001-00 1

16 Screw 4-20x5/8 P/P Trilobe-P BZ (Remote Back Screws) 349-00010-24 4

17 Captive Nut M4 Pressed 352-00010-17 2

18 Remoting Connector Cover 316-85125-00 1

T2004 Multi-Control Head System Manual Assembly/Disassembly Instructions 43

5.2 Disassembling the Control Head

To disassemble the control heads, refer to the parts list opposite, and the

instructions and illustration below.

1. Remove the four retaining screws(16) and two captive nuts (17) from

the back panel.

2. Remove the two retaining screws (14) from the control head PCB.

Note When replacing the screws, tighten to a torque of 8in.lb (0.9N).

3. With the control head face down, gently remove the PCB (13),

keypad (8), and lightspreader (7) from the front panel (3)

Caution Do not disturb the positioning or height of the

LEDs, as this is critical for reassembly.

44 Assembly/Disassembly Instructions T2004 Multi-Control Head System Manual

4. Carefully remove the LCD (6) and lens (12).

5. Lay the assembly on a horizontal surface, with the light spreader (7)

in place.

6. Remove the volume knob (1) and volume knob nut (4) to access the

lightspreader and keypad.

7. Before reassembly, the LCD and PCB edge connectors should be

wiped with alcohol.

Caution Take care to ensure the alcohol does not come into

contact with the coating on the lightspreader, as this

will dissolve on contact with alcohol.

T2004 Multi-Control Head System Manual X2H2xx PCB Information 45

May 2004 © Tait Electronics Limited

6 X2H2xx PCB Information

This section contains all PCB information for the X2H2xx Multi-Head Control Head PCB.

The following information is included:

■PCB parts list

■Grid references

■PCB layout drawings for both sides of the board

■Circuit diagram.

46 X2H2xx PCB Information T2004 Multi-Control Head System Manual

May 2004 © Tait Electronics Limited

T2004 Multi-Control Head System Manual X2H2xx PCB Information 47

May 2004 © Tait Electronics Limited

6.1 X2H221 Rev 007 Parts List

IPN 228-23722-02

Ref IPN Description

BF1 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF2 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF3 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF4 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF5 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF6 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF7 008-00010-25 LED 2mm Grn Tower 3.8 Base

BF8 008-00010-25 LED 2mm Grn Tower 3.8 Base

BL1 008-00020-31 LED 3mm Yel Clear Sunpwr

BL2 008-00020-31 LED 3mm Yel Clear Sunpwr

BL3 008-00020-31 LED 3mm Yel Clear Sunpwr

BL4 008-00020-31 LED 3mm Yel Clear Sunpwr

BL5 008-00020-31 LED 3mm Yel Clear Sunpwr

C1 016-08100-03 Cap Elec SMD 10uF 35V 105/2000

C2 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C3 016-09100-03 Cap Elec SMD 100u 16v 20%

C4 015-25220-08 Cap Cer 0805 22n 10% X7r 50v

C5 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C6 016-09100-03 Cap Elec SMD 100u 16v 20%

C7 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C8 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C9 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C10 016-08100-01 Cap Elec SMD 10m 4*5.2 16v 20%

C15 015-25150-08 Cap Cer 0805 15n 10% X7r 50v

C20 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C21 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C22 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C23 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C24 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C25 015-22100-01 Cap Cer 0805 10p+-0.5p NPO 50v

C26 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C27 015-23100-01 Cap Cer 0805 100p 5% NPO 50v

C28 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C29 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C30 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C31 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C32 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C33 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C34 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C35 015-24470-08 Cap Cer 0805 4n7 10% X7r 50v

C36 015-25150-08 Cap Cer 0805 15n 10% X7r 50v

C37 015-24470-08 Cap Cer 0805 4n7 10% X7r 50v

C38 015-22220-05 Cap 0805 22p 1% 200v

C39 015-22220-05 Cap 0805 22p 1% 200v

C40 015-23150-01 Cap Cer 0805 150p 5% NPO 50v

C41 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C42 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C43 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C44 016-07470-01 Cap Elec SMD 4u7 6*4 16v 20%

C45 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C46 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C47 016-08470-01 Cap Elec SMD 47uf 6*4 16v

C48 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C49 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C50 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C51 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C52 016-07220-06 Cap Elec SMD Bi-P 22u 16v 20%

C53 016-09100-03 Cap Elec SMD 100u 16v 20%

C55 015-23100-01 Cap Cer 0805 100p 5% NPO 50v

C56 015-22330-01 Cap Cer 0805 33p 5% NPO 50v

C57 016-09100-03 Cap Elec SMD 100u 16v 20%

C58 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C59 015-23100-01 Cap Cer 0805 100p 5% NPO 50v

C62 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C67 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C731 015-25100-08 Cap Cer 0805 10n 10% X7r 50v

C732 015-25100-08 Cap Cer 0805 10n 10% X7r 50v

C733 015-25220-08 Cap Cer 0805 22n 10% X7r 50v

C734 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

D1 001-10001-60 Diode SMD BAS16

D2 001-10070-01 Diode BAV70W Dual Ss SOT323

D3 001-10001-60 Diode SMD BAS16

D4 001-10001-60 Diode SMD BAS16

D5 001-10011-74 Diode SMD MRA4004T3 1a/400v

J4 240-00020-87 Hdr 2x5w Ra Pcb Mtg

J5 240-10000-05 Conn SMD 8w 2r Skt M/Match

J6 240-06000-00 Conn 4W Hdr Vrt3.81mm Combicon

JP1 036-10000-00 Res M/F SMD 0805 0e 0.125w

JP2 036-10000-00 Res M/F SMD 0805 0e 0.125w

LCD1 008-02029-00 LCD 8 Chr 14 Seg Alpha T2K

PT501 040-05100-20 Pot 10k Log 3a 16vDC Spst Pcb

Q1 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q2 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q3 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q4 000-10085-71 Xstr SMD BC857BW PNP SOT323

Q5 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q6 000-10085-71 Xstr SMD BC857BW PNP SOT323

Q7 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q8 000-10085-71 Xstr SMD BC857BW PNP SOT323

Q9 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q10 000-10008-17 Xstr SMD BC817-25 NPN SOT23

Q11 000-10008-17 Xstr SMD BC817-25 NPN SOT23

R1 036-16100-00 Res M/F SMD 0805 100k 5%

R5 036-15270-00 Res M/F SMD 0805 27k 5%

R6 036-16100-00 Res M/F SMD 0805 100k 5%

R7 036-15100-10 Res M/F SMD 0805 10k 1%

R8 036-14470-10 Res M/F SMD 0805 4k7 1%

R09 036-17100-00 Res M/F SMD 0805 1m 5%

R10 036-16100-00 Res M/F SMD 0805 100k 5%

R11 036-16100-00 Res M/F SMD 0805 100k 5%

R12 036-16100-00 Res M/F SMD 0805 100k 5%

R13 036-16100-00 Res M/F SMD 0805 100k 5%

R14 036-16100-00 Res M/F SMD 0805 100k 5%

R15 036-15270-00 Res M/F SMD 0805 27k 5%

R16 036-16100-00 Res M/F SMD 0805 100k 5%

R17 036-15180-00 Res M/F SMD 0805 18k 5%

R18 036-15560-10 Res M/F SMD 0805 56k 1%

R19 036-14100-00 Res M/F SMD 0805 1k 5%

R20 036-16100-00 Res M/F SMD 0805 100k 5%

R21 036-15470-10 Res M/F SMD 0805 47k 1%

R22 036-15100-10 Res M/F SMD 0805 10k 1%

R23 036-15100-10 Res M/F SMD 0805 10k 1%

R24 036-15270-00 Res M/F SMD 0805 27k 5%

R25 036-15100-10 Res M/F SMD 0805 10k 1%

Ref IPN Description

48 X2H2xx PCB Information T2004 Multi-Control Head System Manual

May 2004 © Tait Electronics Limited

R26 036-15100-10 Res M/F SMD 0805 10k 1%

R28 036-10000-00 Res M/F SMD 0805 0e 0.125w

R34 036-14470-10 Res M/F SMD 0805 4k7 1%

R35 036-14470-10 Res M/F SMD 0805 4k7 1%

R42 036-15470-10 Res M/F SMD 0805 47k 1%

R43 036-15470-10 Res M/F SMD 0805 47k 1%

R44 036-15470-10 Res M/F SMD 0805 47k 1%

R53 036-15470-10 Res M/F SMD 0805 47k 1%

R69 036-15470-10 Res M/F SMD 0805 47k 1%

R79 036-15470-10 Res M/F SMD 0805 47k 1%

R80 036-15100-10 Res M/F SMD 0805 10k 1%

R81 036-15100-10 Res M/F SMD 0805 10k 1%

R82 036-15100-10 Res M/F SMD 0805 10k 1%

R83 036-15100-10 Res M/F SMD 0805 10k 1%

R84 036-13560-00 Res M/F SMD 0805 560e 5%

R85 036-13560-00 Res M/F SMD 0805 560e 5%

R86 036-13560-00 Res M/F SMD 0805 560e 5%

R87 036-13560-00 Res M/F SMD 0805 560e 5%

R88 036-16180-00 Res M/F SMD 0805 180k 5%

R89 036-13470-00 Res M/F SMD 0805 470e 5%

R90 036-15100-10 Res M/F SMD 0805 10k 1%

R91 036-14120-00 Res M/F SMD 0805 1k2 5%

R92 036-14270-00 Res M/F SMD 0805 2k7 5%

R93 036-14100-00 Res M/F SMD 0805 1k 5%

R94 036-14270-00 Res M/F SMD 0805 2k7 5%

R95 036-14120-00 Res M/F SMD 0805 1k2 5%

R96 036-14270-00 Res M/F SMD 0805 2k7 5%

R97 036-13470-00 Res M/F SMD 0805 470e 5%

R98 036-13390-00 Res M/F SMD 0805 390e 5%

R99 036-13470-00 Res M/F SMD 0805 470e 5%

R100 036-14270-00 Res M/F SMD 0805 2k7 5%

R101 036-14270-00 Res M/F SMD 0805 2k7 5%

R102 036-15470-10 Res M/F SMD 0805 47k 1%

R103 036-15100-10 Res M/F SMD 0805 10k 1%

R104 036-18100-00 Res M/F SMD 0805 10m 5%

R105 036-14330-00 Res M/F SMD 0805 3k3 5%

R106 036-15470-10 Res M/F SMD 0805 47k 1%

R107 036-15100-10 Res M/F SMD 0805 10k 1%

R108 036-15100-10 Res M/F SMD 0805 10k 1%

R109 036-15100-10 Res M/F SMD 0805 10k 1%

R110 036-15100-10 Res M/F SMD 0805 10k 1%

R111 036-13560-00 Res M/F SMD 0805 560e 5%

R112 036-13560-00 Res M/F SMD 0805 560e 5%

R113 036-13560-00 Res M/F SMD 0805 560e 5%

R114 036-13560-00 Res M/F SMD 0805 560e 5%

R117 036-13120-00 Res M/F SMD 0805 120e 5%

R119 036-15100-10 Res M/F SMD 0805 10k 1%

R120 036-16150-00 Res M/F SMD 0805 150k 5%

R121 036-14220-00 Res M/F SMD 0805 2k2 5%

R123 036-13470-00 Res M/F SMD 0805 470e 5%

R124 036-13470-00 Res M/F SMD 0805 470e 5%

R125 036-15470-10 Res M/F SMD 0805 47k 1%

R126 036-15470-10 Res M/F SMD 0805 47k 1%

R127 036-14470-10 Res M/F SMD 0805 4k7 1%

R128 036-15270-00 Res M/F SMD 0805 27k 5%

R129 036-15470-10 Res M/F SMD 0805 47k 1%

R130 036-15220-10 Res M/F SMD 0805 22k 1%

R133 036-16270-00 Res M/F SMD 0805 270k 5%

R135 036-13120-00 Res M/F SMD 0805 120e 5%

R136 036-13120-00 Res M/F SMD 0805 120e 5%

R138 036-15100-10 Res M/F SMD 0805 10k 1%

R139 036-15390-00 Res M/F SMD 0805 39k 5%

R140 036-16220-00 Res M/F SMD 0805 220k 5%

R141 036-15270-00 Res M/F SMD 0805 27k 5%

Ref IPN Description

R142 036-15150-10 Res M/F SMD 0805 15k 1%

R143 036-15270-00 Res M/F SMD 0805 27k 5%

R144 036-12390-00 Res M/F SMD 0805 39e 5%

R145 036-15270-00 Res M/F SMD 0805 27k 5%

R146 036-10000-00 Res M/F SMD 0805 0e 0.125w

R147 036-14100-00 Res M/F SMD 0805 1k 5%

R148 036-15100-10 Res M/F SMD 0805 10k 1%

R149 036-15100-10 Res M/F SMD 0805 10k 1%

R595 036-12100-10 Res M/F SMD 0805 10e 1%

RLY2 002-10117-00 IC SMD TS117 Opto 8p Fpak

S10 240-04021-61 Skt 6w Phone Jack S-Ent

S11 240-00020-87 Hdr 2x5w Ra Pcb Mtg

T2 054-00010-20 Xmfr SMD Ct Etal2782

U1 002-10018-77 IC SMD LM1877M Dual Af Pwr Amp

U2 002-10003-58 IC SMD LM358 Dual 0-Amp

U13 240-04020-42 Skt 44 Pin SMD Plcc

U14 002-10340-64 IC SMD MC34064 L-Volt Sense

U15 002-74900-04 IC SMD 74HC04D 6x Inv Buffd

U16 002-74900-04 IC SMD 74HC04D 6x Inv Buffd

U17 002-10085-76 IC SMD PCF8576T LCD Dvr

U19 002-10004-83 IC SP483EEN RS485 Xcvr/Esd S08

U20 002-10016-51 IC SMD SSM2165-1s Preamp S0-8

U21 002-10004-83 IC SP483EEN RS485 Xcvr/Esd S08

U22 002-12951-00 IC SMD LP2951CM Adj Vltge Reg

U23 002-10021-42 IC SMD TLE2142CD Opamp S08

X2 274-01070-00 Xtal 4.000MHz Hc-49u/S Lo-Prof

002-20068-07 IC MC68HC705C8AFN Otp Micro

209-01027-00 Strip A3m2544 SI Impregnated

228-23722-01 Pcb T2020/40 Multi/Ctrl Head

304-07036-02 Light Sprdr 20 Bttn T2K SII

311-01042-01 Knob A3M2530 T2K SII

311-03076-01 K/Pad T2020 SII International

312-01046-05 Lens LCD Dsply T2K FM2/TR2

316-02001-00 Pnl M/Ctrl Hd Back T2K

316-06430-02 Pnl Frt Scrn T2020/40/50 SII

316-85125-00 Plate Cvr T2K

365-01516-01 Lbl T2K Model Id T/A

399-00010-53 Bag Plstc 150*250mm

349-00010-22 Scrw 4-20x3/8 P/P Trilobe-P BZ

352-00010-17 Nut M4 Pressed Sq S/T Bz

349-00010-24 Scrw 4-20x5/8 P/P Trilobe-P BZ

Ref IPN Description

T2004 Multi-Control Head System Manual X2H2xx PCB Information 49

May 2004 © Tait Electronics Limited

6.2 X2H221 Rev 007 Grid Reference

IPN 228-23722-02

Grid

Ref

PCB Circuit Diagram

B0 D4 1F2

B1 E7 1G2

B2 D7 1G2

B3 B7 1G1

B4 E6 1G2

B5 D6 1G2

B6 B6 1G1

B7 E5 1G2

B8 D5 1G2

B9 B5 1G1

B# B4 1F1

B* E4 1F2

BF1 N5 1H12

BF2 M5 1J12

BF3 K5 1F12

BF4 H5 1G12

BF5 N3 1H12

BF6 M3 1H12

BF7 K3 1F12

BF8 H3 1G12

BL1 K4 1D9

BL2 C4 1D9

BL3 C6 1D9

BL4 F6 1D10

BL5 P7 1D10

C1 A7 1C12

C2 L5 1C6

C3 A6 1B14

C4 C6 1E11

C5 C5 1B11

C6 B7 1C13

C7 K7 1J8

C8 P6 1E6

C9 A4 1B7

C10 A5 1B10

C15 M6 1J7

C20 B5 1J3

C21 F4 1B2

C22 C5 1E12

C23 D4 1J4

C24 F8 1J1

C25 A4 1B8

C26 L6 1K9

C27 B4 1B9

C28 D7 1D12

C29 K5 1B14

C30 E5 1E13

C31 F6 1D13

C32 G4 1D13

C33 E5 1E14

C34 J4 1H7

C35 D5 1H4

C36 D5 1H5

C37 G5 1H5

C38 K6 1H9

C39 K7 1H9

C40 F6 1D14

C41 E4 1A1

C42 E3 1B3

C43 E4 1B3

C44 P6 1E6

C45 E6 1E6

C46 D6 1D6

C47 J4 1B6

C48 D5 1E13

C49 C6 1D13

C50 F5 1B1

C51 N5 1C4

C52 F3 1A3

C53 N5 1C5

C55 D3 1B4

C56 D3 1B4

C57 C4 1C3

C58 D4 1B5

C59 D5 1B5

C60 D5 1B6

C62 B6 1B11

C67 C7 1C13

C68 A5 1B13

C731 S3 1D2

C732 R4 1D2

C733 R4 1D2

C734 R4 1D1

D1 D6 1D6

D2 N6 1D5

D3 B5 1B9

D4 G7 1F10

D5 M5 1C14

F1 N5 1G5

F2 L5 1G4

F3 J5 1G4

F4 G5 1G3

F5 N4 1G5

F6 L4 1G4

F7 J4 1G4

F8 G4 1G3

J4 R5 1E4

J5 G5 1B7 1C7 1D14 1E14

J6 L5 1B14

JP1 G6 1F10

JP2 F6 1D4

LCD1 K8 1J13

P1 G7 1E10

P2 P5 1H4

P3 E3 1B3

PHH1 A4 1A8

PT501 S1 1D2 1D3

PTH2 N4 1A9

PTH3 P4 1A9

PTH4 P5 1A10

Grid

Ref

PCB Circuit Diagram

50 X2H2xx PCB Information T2004 Multi-Control Head System Manual

PTH5 P7 1A10

PTH6 C3 1A11

PTH7 B7 1A11

PTH8 D7 1A12

Q1 B6 1B11

Q2 B5 1B10

Q3 G7 1G9

Q4 H4 1E9

Q5 G7 1F10

Q6 D6 1E11

Q7 H4 1E9

Q8 E5 1H6

Q9 P6 1F6

Q10 D6 1D6

Q11 G7 1E9

R1 H7 1H8

R4 A6 1B13

R5 C6 1B11

R6 C6 1E11

R7 B5 1B10

R8 A4 1B7

R9 A4 1B8

R10 B4 1B9

R11 A4 1A7

R12 B5 1B10

R13 B4 1B8

R14 B4 1A8

R15 B5 1B10

R16 B6 1B11

R17 C5 1B8

R18 A4 1B7

R19 B5 1B9

R20 G6 1G10

R21 G7 1G9

R22 G7 1F9

R23 G7 1G10

R24 G6 1F9

R25 B6 1B10

R26 B5 1B11

R28 R1 1D2

R34 K6 1J8

R35 L6 1J8

R42 J5 1G5

R43 J5 1G5

R44 J5 1G6

R53 J5 1G6

R69 J5 1G6

R79 J4 1J7

R80 E6 1J11

R81 E7 1H11

R82 F7 1H11

R83 F7 1G11

R84 L5 1J12

R85 L4 1H12

R86 N5 1H12

R87 N4 1H12

R88 L6 1J9

R89 L6 1K9

R90 M6 1K9

R91 M6 1K9

R92 G6 1G6

R93 G4 1E9

R94 G6 1G5

Grid

Ref

PCB Circuit Diagram

R95 G4 1E10

R96 G6 1G5

R97 H4 1E9

R98 G4 1D9

R99 D5 1H5

R100 G6 1G6

R101 E5 1H5

R102 D5 1H5

R103 E6 1H6

R104 K6 1H8

R105 G7 1E8

R106 G7 1F9

R107 F7 1G11

R108 E7 1G11

R109 E7 1F11

R110 E7 1F11

R111 H5 1G12

R112 H4 1G12

R113 K5 1F12

R114 J4 1F12

R117 E4 1B1

R118 P5 1F5

R119 E4 1B3

R120 E4 1B3

R121 P6 1F6

R123 D6 1E5

R124 E6 1E5

R125 D6 1D6

R126 D6 1D6

R127 D6 1E7

R128 C4 1B3

R129 D6 1D7

R130 C4 1C3

R133 A6 1B13

R135 C6 1D13

R136 D5 1E13

R137 E5 1A1

R138 M5 1D4

R139 E4 1A3

R140 D4 1B4

R141 D4 1B4

R142 C4 1C3

R143 D4 1B5

R144 J4 1B6

R145 D5 1B5

R146 D5 1B6

R147 K4 1A7

R148 A6 1B12

R149 G7 1F8

R595 S3 1E2

RLY2 M4 1A6

S10 S3 1E1

S11 S3 1E3

T2 L4 1C7

U1 B6 1B13

U13 J6 1G7

U14 L5 1H6

U15 F7 1F11 1G11 1K1 1H11

U16 E6 1E6 1H11 1J11 1K2 1D8 1C7

U17 M7 1J9

U19 C5 1E12

U2 B4 1K3 1B8 1B9

U20 F4 1A2

Grid

Ref

PCB Circuit Diagram

T2004 Multi-Control Head System Manual X2H2xx PCB Information 51

U21 D7 1D12

U22 M5 1C5

U23 D4 1B6 1K4 1B4

X2 K7 1H8

Grid

Ref

PCB Circuit Diagram

52 X2H2xx PCB Information T2004 Multi-Control Head System Manual

6.3 228-23722-02 PCB Top Side

T2004 Multi-Control Head System Manual X2H2xx PCB Information 53

6.4 228-23722-02 PCB Bottom Side

54 X2H2xx PCB Information T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 55

6.5 X2H221- PCB Circuit Diagram (page 1 of 1)

56 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 57

7 Testing the X2H2xx control heads

Test equipment

■T2020 or T2040 radio with power supply in known working order.

■X2AM01 radio interface board in known working order.

■Microphone, speaker and power supply for control head.

■8 way micromatch loom to connect X2AM01 to radio.

■8 way micromatch loom to connect primary head under test.

■Radio communications test set.

■Multimeter.

■20MHz oscilloscope, preferably digital storage.

■Standard tools, screwdrivers, etc.

Setting up

1. If T2004 control head under test is not configured as a primary head,

temporarily fit shorting link to position JP2.

2. Connect SK1 of the X2AM01 board to connector S9 of radio logic

board.

3. Connect SK3 of the X2AM01 board to connector J5 of the control

head under test.

4. Connect power and microphone to the primary control head as usual.

5. Connect the radio's antenna jack to the RF input/output of the

communication test set.

6. Connect a suitable 13.8VDC 10A power supply to the radio.

Te st i n g

Power

■Check there is always +13.8V on U22 pin 8 and U1 pin 14.

■Check U22 pin 3 is high when the control head switch (volume control)

is off, and around 0V when the control head is switched on.

■Check there is 5V on U22 pin 1 when control head is on.

■Check 1/2 VCC rail on C57 is around 2-3V.

58 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

Microprocessor

■Check reset line U14 pin 1 is at 5V.

■Use oscilloscope to check for 4MHz oscillation on crystal X2 or resistor

R104.

■With micromatch cable on J5 removed, switch on control head with any

key held down. On power up the display should always show software

version number (2372A510). When key is released, all display segments

and LEDs should flash.

Audio

■Transmit on microphone and apply audio (E.G. whistle into

microphone), check for approx. -15dBm line audio on RLY2 pins 7 and

8. Radio should enter transmit mode and have normal TX deviation.

"TX" should appear on the LCD.

■With the radio in receive mode, generate a test signal of -70dBm RF

level, 60% system deviation (1.5kHz for narrow band, 3kHz for wide

band). Check for approx. -10dBm line audio at C2. Check Q1 base is at

0V, so PA is not muted. Check that audio level into PA on U1 pin 7

varies with volume control. Check for high level audio output on U1 pin

Global mute

■Ensure link JP1 is fitted to enable global mute.

■When not transmitting and microphone off hook (hang up stud not

earthed), check that JP1 is at 5V.

■With microphone on hook (hang up stud connected to 0V), check that

JP1 is at 0V.

■Temporarily fit a 1k ohm resistor between JP1 and U22 pin 1. Make

radio receive a test signal and adjust volume so audio can be heard in

control head speaker while microphone is off hook. Speaker should mute

when microphone is placed on hook. Remove link resistor when

finished.

Data

■Turn radio off then on using control head volume switch. Use

oscilloscope to check for 5V TTL data on U21 pin 1. Note that data only

lasts a few seconds after power on.

■After power up, confirm that key presses on control head appear as 5V

TTL data on U19 pin 4. Connect oscilloscope channel 1 on J5 pin 1,

channel 2 on J5 pin 2. Verify differential mode data exists on RS485 line

when keys are pressed.

PC programming

■Connect T2000 programming cable to microphone socket, check for

approx. 13.8V on microphone socket S10 pin 1.

■Verify that radio can be read correctly with appropriate radio

programming software.

T2004 Multi-Control Head System Manual Part C X2AM01 Radio Interface 59

Part C X2AM01 Radio Interface

This part provides general and technical information about the

X2AM01 Multi-Head Radio Interface.

The following topics are covered in this part:

■Section 1 Introduction

■Section 2 Circuit Description

■Section 3 I/O Connections

■Section 4 Fitting PCB into Radio

■Section 5 X2AM01 Multi-Head Radio Interface PCB

■Section 6 Testing the X2AM01 radio interface

60 Part C X2AM01 Radio Interface T2004 Multi-Control Head System Manual

1 Introduction

1.1 The X2AM01 Multi-Head Radio Interface PCB

The X2AM01 Multi-Head Radio Interface PCB is the interface between a

standard T2020 or T2040 radio and the remote control heads in the T2004

Multi-Control Head system.

The PCB fits inside a dummy (Clayton’s) control head, which replaces the

standard control head of the radio. Only one X2AM01 Multi-Head Radio

Interface PCB is used in the system.

T2004 Multi-Control Head System Manual Part C X2AM01 Radio Interface 61

2 Circuit Description

This section provides circuit information for the X2AM01 Multi-Head

Radio Interface PCB.

Audio

The PCB provides a balanced 600 Ohm line interface for both the Tx and

Rx audio.

Power

The PCB is supplied with 13.8V from the radio. A single 5V supply is

provided for circuitry on the X2AM01 Interface PCB only.

The remote power switch line SK3-3 (controlled by the Primary head)

enables the 5V regulator, which in turn draws current from the radio (SK1-

1) and causes the radio to power up.

Data

A separate RS485 transmitter and receiver provide the data communications

between the radio and control heads.

Connections

The connection to the radio is the same as for a standard T2000 control head

(micromatch cable to SK1). Connection to the remote control heads is via

the micromatch loom at SK3, which connects to the RJ45 Wallbox. The

wallbox connects to the multi-drop cable, which connects to the RJ45

Wallbox for each control head.

62 Part C X2AM01 Radio Interface T2004 Multi-Control Head System Manual

3 I/O Connections

This section describes the I/O connections on the board.

3.1 SK1: 8 Way Micromatch Socket to Radio

3.2 SK3: 8 Way Micromatch Socket to Control Heads

Pin Signal Description

1 +13.0V_UNSW Unswitched 13.8V from radio

2 GND Common ground

3 RX_DATA Data from heads to radio, 5V logic levels

4 TX_DATA Data from radio to heads, 5V logic levels

5 GND Common ground

6 AF Receiver audio, approx. -4dBm

7 MIC_IN Transmitter audio, approx. -30dBm

8 N/C Not connected

Pin Signal Description

1 DATA 2A Data from heads A

2 DATA 2B Data from heads B

3 PWR SW Remote power switch, Low=power on

4 Audio Balanced audio line

5 Audio Balanced audio line

6 GND Common ground

7 DATA 1A Data to heads A

8 DATA 1B Data to heads B

T2004 Multi-Control Head System Manual Part C X2AM01 Radio Interface 63

4 Fitting PCB into Radio

The T2004 Multi-Control Head Installation Manual M2004-00-100-315

should be referred to for the installation process.

64 Part C X2AM01 Radio Interface T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 65

5 X2AM01 Multi-Head Radio Interface PCB

This section contains all PCB information for the Multi-Head interface PCB.

The following information is included for the board:

■PCB parts list

■Grid references

■PCB layout drawings for both sides of the board

■Circuit diagram.

66 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 67

5.1 X2AM01 Rev 008 Parts List

IPN 228-23721-01

Ref IPN Description

C1 015-27100-10 Cap Cer 0805 1m+80-20% Y5v 16v

C2 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C3 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C6 015-23100-01 Cap Cer 0805 100p 5% NPO 50v

C7 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C8 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C9 016-09100-01 Cap Elec SMD 100u 6.6*6.6 6.3v

C10 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C11 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C14 015-24100-08 Cap Cer 0805 1n 10% X7r 50v

C15 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C18 015-26100-08 Cap Cer 0805 100n 10% X7r 50v

C21 016-08100-01 Cap Elec SMD 10m 4*5.2 16v 20%

C26 015-22330-01 Cap Cer 0805 33p 5% NPO 50v

C36 015-22330-01 Cap Cer 0805 33p 5% NPO 50v

C39 015-23100-01 Cap Cer 0805 100p 5% NPO 50v

D1 001-10284-51 Diode SMD BZX284B5V1 Zensod110

R1 036-14180-00 Res M/F SMD 0805 1k8 5%

R2 036-15560-00 Res M/F SMD 0805 56k 5%

R3 036-14100-00 Res M/F SMD 0805 1k 5%

R4 036-14150-00 Res M/F SMD 0805 1k5 5%

R5 036-14150-00 Res M/F SMD 0805 1k5 5%

R7 036-15270-00 Res M/F SMD 0805 27k 5%

R8 036-12390-00 Res M/F SMD 0805 39e 5%

R9 036-15270-00 Res M/F SMD 0805 27k 5%

R10 036-15220-10 Res M/F SMD 0805 22k 1%

R12 036-15120-10 Res M/F SMD 0805 12k 1%

R13 036-15270-00 Res M/F SMD 0805 27k 5%

R17 036-15560-00 Res M/F SMD 0805 56k 5%

R18 036-15220-10 Res M/F SMD 0805 22k 1%

R25 036-14150-00 Res M/F SMD 0805 1k5 5%

R26 036-14150-00 Res M/F SMD 0805 1k5 5%

R27 036-13150-00 Res M/F SMD 0805 150e 5%

R28 036-13150-00 Res M/F SMD 0805 150e 5%

R38 036-14820-10 Res M/F SMD 0805 8k2 1%

R42 036-15270-00 Res M/F SMD 0805 27k 5%

SK1 240-10000-05 Conn SMD 8w 2r Skt M/Match

SK3 240-10000-05 Conn SMD 8w 2r Skt M/Match

T1 054-00010-20 Xmfr SMD Ct Etal2782

U1 002-10021-42 IC SMD TLE2142CD Opamp S08

U2 002-12951-00 IC SMD LP2951CM Adj Vltge Reg

U4 002-10004-83 IC SP483EEN RS485 Xcvr/Esd S08

U5 002-10004-83 IC SP483EEN RS485 Xcvr/Esd S08

219-02013-00 T2K 8way Loom Logic-Ctrl Hd

228-23721-01 Pcb T2020/40 M/Ctrl Hd Rad I/F

365-00011-54 Lbl White R1556/2 90*24mm

399-00010-51 Bag Plstc 75*100mm

399-00010-86 Bag Static Shlding 127x203mm

349-00020-32 Scrw M3*8mm T/T P/P Bz

353-00010-16 Wshr M3 Fibre 8mm Od*1.5mm

68 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 69

5.2 X2AM01 Rev 008 Grid Reference

Ref PCB Circuit Diagram

C1 A2 1C3

C2 B3 1E6

C3 B2 1B9

C6 C1 1C6

C7 D4 1D8

C8 E2 1D8

C9 A1 1C2

C10 C4 1E3

C11 G2 1D9

C14 G3 1D10

C15 B1 1B7

C18 C1 1B6

C21 A4 1E5

C26 C1 1C6

C36 B1 1C4

C39 B1 1C5

D1 F1 1F8

MT1 D3 1D8

MT2 D2 1D8

MT3 G2 1D9

MT4 G3 1D10

R1 C4 1C3

R2 C1 1C6

R3 C4 1B2

R4 B2 1G7

R5 C2 1F7

R7 C1 1C6

R8 C1 1D6

R9 C1 1C6

R10 A2 1D2

R12 A2 1C3

R13 C1 1C5

R17 A1 1C4

R18 C4 1B3

R25 B3 1E7

R26 C3 1E7

R27 C3 1E7

R28 C2 1F7

R38 C4 1B3

R42 C2 1C5

SK1 F4 1B2 1G2 1C2 1D2 1E2

SK3 F2 1C9 1G9 1F9 1E9

T1 D1 1C7

TP1 C1 1D4

TP2 C1 1C7

U1 B1 1B9 1C4 1C6

U2 B4 1E5

U4 B2 1F7

U5 B3 1E7

70 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

5.3 228-23721-01 PCB Top Side

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 71

5.4 228-23721-01 PCB Bottom Side

72 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

5.5 X2MA01 PCB Circuit Diagram (page 1 of 1)

T2004 Multi-Control Head System Manual Part B T2004 Control Heads 73

6 Testing the X2AM01 radio interface

Test equipment

■T2020 or T2040 radio with power supply in known working order.

■X2H2x1 Primary control head in known working order.

■Microphone, speaker and power supply for control head.

■8 way micromatch loom to connect X2AM01 to radio.

■8 way micromatch loom to connect primary head.

■Radio communications test set.

■Multimeter.

■20MHz oscilloscope, preferably digital storage.

■Standard tools, screwdrivers, etc.

Setting up

7. Connect SK1 of the X2AM01 board to connector S9 of radio logic

board.

8. Connect SK3 of the X2AM01 board to connector J5 of the primary

control head.

9. Connect power and microphone to the primary control head as usual.

10. Connect the radio's antenna jack to the RF input/output of the

communication test set.

11. Connect a suitable 13.8VDC 10A power supply to the radio.

Te st i n g

Power

■Check there is always +13.8V on U2 pin 8.

■Check U2 pin 3 is high when the control head switch (volume control)

is off, and around 0V when the control head is switched on.

■Check there is 5V on U2 pin 1 when control head is on.

■Check 1/2 VCC rail at TP1 is around 2-3V.

■Check radio turns off (0V on radio logic board S14 pin 1) when control

head is off, check radio is on (+13.8V on S14 pin 1) when control head

is on.

74 Part B T2004 Control Heads T2004 Multi-Control Head System Manual

Audio

■Transmit on microphone and apply audio (E.G. whistle into

microphone), check for approx. -15dBm line audio at TP2, check for

approx. -30dBm mic audio on SK1 pin 7. Radio should enter transmit

mode and have normal TX deviation.

■With the radio in receive mode, generate a test signal of -70dBm RF

level, 60% system deviation (1.5kHz for narrow band, 3kHz for wide

band). Check for approx. -4dBm of receiver audio on SK1 pin 6. Check

for approx. -10dBm line audio on TP2. Ensure audio appears on 600

ohm balanced line (measure between SK3 pins 4 and 5).

Data

■Turn radio off then on using control head volume switch. Use

oscilloscope to check for 5V TTL data on SK1 pin 4. Note that data only

lasts a few seconds after power on. Connect oscilloscope channel 1 on

SK3 pin 7, channel 2 on SK3 pin 8. Verify differential mode data exists

on RS485 line at radio power on.

■After power up, confirm that key presses on control head appear as 5V

TTL data on SK1 pin 3.

T2000/T2004 Multi Head System For T2020 T2040 Radios/T2004 Radios T2004

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