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36

Circuit Description

T2004 Multi-Control Head 

System Manual

© Tait Electronics Limited 

May 2004

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.

Summary of Contents for T2004

Page 1: ...T2000 mobiles T2004 Multi Control Head System Manual M2004 00 000 814 May 2004 Tait Electronics Limited...

Page 2: ...o 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...

Page 3: ...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...

Page 4: ...atch 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...

Page 5: ...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 3 228 237...

Page 6: ...6 T2004 Multi Control Head System Manual Tait Electronics Limited May 2004...

Page 7: ...demark 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 f...

Page 8: ...al 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...

Page 9: ...n about the T2004 Multi Control Head 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...

Page 10: ...10 T2004 Multi Control Head System Manual Tait Electronics Limited May 2004...

Page 11: ...eads 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 layo...

Page 12: ...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...

Page 13: ...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 syste...

Page 14: ...ty 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 Se...

Page 15: ...T2004 Multi Control Head System Manual System Overview 15 Tait Electronics Limited May 2004 2 2 System Diagram...

Page 16: ...o 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 informat...

Page 17: ...em 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...

Page 18: ...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 follow...

Page 19: ...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 t...

Page 20: ...ation T2004 Multi Control Head System Manual Tait Electronics Limited May 2004 3 System Installation The T2004 Multi Control Head Installation Manual M2004 00 000 315 should be referred to for the ins...

Page 21: ...rol 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 T...

Page 22: ...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 t...

Page 23: ...e 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 pi...

Page 24: ...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 impo...

Page 25: ...d 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...

Page 26: ...26 System Equipment Specifications T2004 Multi Control Head System Manual Tait Electronics Limited May 2004...

Page 27: ...ionality 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 con...

Page 28: ...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 Che...

Page 29: ...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 functi...

Page 30: ...30 System Fault Finding T2004 Multi Control Head System Manual Tait Electronics Limited May 2004...

Page 31: ...tem 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 follow...

Page 32: ...32 T2004 Multi Control Head System Manual Tait Electronics Limited May 2004...

Page 33: ...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...

Page 34: ...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...

Page 35: ...20 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 Secon...

Page 36: ...y 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...

Page 37: ...cations 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...

Page 38: ...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 appropr...

Page 39: ...n hook no Rx audio OUT 1 1 0 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 O...

Page 40: ...tions 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 gro...

Page 41: ...a 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...

Page 42: ...tion 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...

Page 43: ...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 tight...

Page 44: ...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 shoul...

Page 45: ...04 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 refe...

Page 46: ...46 X2H2xx PCB Information T2004 Multi Control Head System Manual May 2004 Tait Electronics Limited...

Page 47: ...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 0...

Page 48: ...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...

Page 49: ...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 C4...

Page 50: ...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 R1...

Page 51: ...T2004 Multi Control Head System Manual X2H2xx PCB Information 51 May 2004 Tait Electronics Limited U21 D7 1D12 U22 M5 1C5 U23 D4 1B6 1K4 1B4 X2 K7 1H8 Grid Ref PCB Circuit Diagram...

Page 52: ...52 X2H2xx PCB Information T2004 Multi Control Head System Manual May 2004 Tait Electronics Limited 6 3 228 23722 02 PCB Top Side...

Page 53: ...T2004 Multi Control Head System Manual X2H2xx PCB Information 53 May 2004 Tait Electronics Limited 6 4 228 23722 02 PCB Bottom Side...

Page 54: ...54 X2H2xx PCB Information T2004 Multi Control Head System Manual May 2004 Tait Electronics Limited...

Page 55: ...T2004 Multi Control Head System Manual Part B T2004 Control Heads 55 May 2004 Tait Electronics Ltd 6 5 X2H221 PCB Circuit Diagram page 1 of 1...

Page 56: ...56 Part B T2004 Control Heads T2004 Multi Control Head System Manual May 2004 Tait Electronics Ltd...

Page 57: ...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 X2...

Page 58: ...eck for high level audio output on U1 pin 2 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 W...

Page 59: ...t 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...

Page 60: ...erface 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...

Page 61: ...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 RS...

Page 62: ...itched 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...

Page 63: ...ad System Manual Part C X2AM01 Radio Interface 63 Tait Electronics Ltd May 2004 4 Fitting PCB into Radio The T2004 Multi Control Head Installation Manual M2004 00 100 315 should be referred to for the...

Page 64: ...64 Part C X2AM01 Radio Interface T2004 Multi Control Head System Manual Tait Electronics Ltd May 2004...

Page 65: ...it Electronics Ltd 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...

Page 66: ...66 Part B T2004 Control Heads T2004 Multi Control Head System Manual May 2004 Tait Electronics Ltd...

Page 67: ...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 0...

Page 68: ...68 Part B T2004 Control Heads T2004 Multi Control Head System Manual May 2004 Tait Electronics Ltd...

Page 69: ...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 C...

Page 70: ...70 Part B T2004 Control Heads T2004 Multi Control Head System Manual May 2004 Tait Electronics Ltd 5 3 228 23721 01 PCB Top Side...

Page 71: ...T2004 Multi Control Head System Manual Part B T2004 Control Heads 71 May 2004 Tait Electronics Ltd 5 4 228 23721 01 PCB Bottom Side...

Page 72: ...72 Part B T2004 Control Heads T2004 Multi Control Head System Manual May 2004 Tait Electronics Ltd 5 5 X2MA01 PCB Circuit Diagram page 1 of 1...

Page 73: ...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...

Page 74: ...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 SK...

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