This Section provides information on T2000 Series II accessories. The following accessories are covered in this Section: Section Title PCB IPN Page 220-01170-03 8.1.1 8.1 T2008 Power Supply 8.2 Connection To External Devices 8.2.1 8.3 T2000-500 & T2000-600 1-7W Versions 8.3.1 8.4 T2000-05 Remote Speaker Kit 8.4.1 8.5 T2000-A06 Desktop Microphone Kit 8.5.1 8.6 T2000-A07 DTMF Microphone Kit 8.6.1 8.7 T2000-34 Selcall Kit 8.7.1 8.
The following topics are covered in this Section: Section Title Page 8.1.1 Operation 8.1.2 8.1.2 Performance Specifications 8.1.3 8.1.3 Precautions 8.1.5 8.1.4 Circuit Operation 8.1.6 8.1.5 Installation 8.1.8 8.1.6 Introduction To Servicing 8.1.10 8.1.7 Setting Up The Power Supply 8.1.12 8.1.8 Fault Finding 8.1.14 8.1.9 Repair 8.1.15 8.1.10 PCB Information 8.1.
The T2008 Power Supply is a mains operated power supply designed to provide the DC supply requirements of the T2000 Series II radios. It uses switch mode technology to control the regulation of the output voltage, which results in a power supply with a higher temperature rating, improved efficiency and greater reliability.
T2000-21, -23, -24: Voltage Frequency .. 230V ±10% (limits: 207-253V AC) .. 50Hz T2000-22: Voltage Frequency .. 115V ±10% (limits: 105-130V AC) .. 60Hz Power (mains input +10%, current limited output) Mains Supply Plug: T2008-21 T2008-22 T2008-23 T2008-24 .. 200VA maximum .. .. .. .. New Zealand USA UK European Voltage .. 13.8V DC (adjustable 12.5 to 14.
Input: Primary Fuse: T2008-21, -23, -24 T2008-22 Thermal Cutout .. 1A time delayed .. 3A .. integral with transformer Ripple and Noise 0 to 6.0A, mains voltage ±10% .. less than 10mVrms Operating Temperature Range .. -10°C to +40°C Weight .. 3.0kg Dimensions: Height Length Width .. 95mm .. 225mm ..
! " # $ % & The power supply contains voltages that may be lethal. The unit should not be dismantled without first disconnecting the mains supply. Servicing should be carried out only by qualified technicians. ! " % If the power supply is operated at high output currents and/or a high duty cycle rate for a prolonged period of time (e.g. more than 10 minutes), the heatsink will become very hot. Do not touch.
* ! Refer to the diagram to the rear of this Section. ) The mains supply is connected to the primary of the transformer via the supply cord, input fuse and on/off switch. A conventional bridge rectifier is used across the secondary winding of the transformer, with both positive and negative leads being isolated from earth. Five PCB mounted smoothing capacitors are used to produce a 23V DC bus from the 18Vrms secondary of the transformer.
+ , % & Overvoltage protection is provided by diode D2 and fuse F2. D2 is a 16V zener transient suppression diode that reacts instantly to overvoltage DC or spikes. If an overvoltage condition persists, causing excessive power dissipation in D2, it will become short circuit, causing F2 to blow. F2 will need to be replaced before operation of the power supply is possible. D2 will need to be replaced to restore overvoltage protection.
The T2008 power supply is designed to provide the DC supply requirements of the Tait T2000 two way radios. It can be operated either with the radio sitting on top as a desk top unit, or with the radio and power supply detached as two separate units. The bottom case includes two screw recesses for wall mounting. The two way radio then can be mounted in its cradle next to the supply, or operated away from it, e.g. on a desk top, etc.
- . !$ & & # ( ( / The power supply has a limited capability to float charge a lead acid battery under constant voltage conditions. The performance is limited by the way the power supply’s continuous output current rating is limited (typically 4.5A at 20°C). The following diagram shows an external protection circuit, consisting of two diodes with the appropriate ratings (i.e. 10A/50V), to be used when float charging a lead acid battery.
* ( , & All sub-assemblies within the T2008 power supply (e.g. transformer, PCB/heatsink) are housed in a specially moulded plastic case with no screws. The top and bottom halves of the plastic case are fastened by four self-tapping screws. All electrical components except the transformer and LED are mounted on either the larger regulator/heatsink PCB or on the smaller mains input PCB.
) $ $ & 01 2 Unsolder the leads of the transistor using solder wick or a solder sucker. Remove the appropriate screws and carefully lift off the transistor. Mount the new transistor using a silicon insulating gasket on the underside. Do not use any other insulators (mica, etc) as they are unlikely to fit under Q1 and/or would require thermal compound. Refit the two screws for Q1 from the copper side of the PCB.
+ & 4 $ 56 ) 6 ( • Ammeter: 10A DC • Voltmeter: 0 - 20V DC • Load Resistor: 0 - 100Ω, 10A (variable) • Short circuit plug-in link: IPN 240-04020-62 • Ohmmeter: infinity to 0Ω Refer to the T2008 circuit and wiring diagrams to the rear of this Section. Check with the ohmmeter that the heatsink is electrically isolated from the negative output.
Insert the plug-in link (1 - 2). Switch on the power supply. Set RV2 (TSD) so that the power supply just shuts down. Switch off the power supply. Remove the plug-in link. ! # Reconnect the load resistor. Switch on the power supply. Decrease the load resistance (current rises) and set it for an output current of approximately 9.5A. Decrease the load resistance and the voltage output should drop, indicating that current limiting is in progress.
. . ( & The checks listed below have been included to provide assistance in locating faults. It is sometimes convenient to disable a complete section of the power supply in order to isolate a fault. If individual sections are isolated the rest of the unit should operate normally (refer to Figure 8.1.2, “Typical Waveforms” for details).
9 , The following waveforms can be expected under the stated conditions. ! "# - ) The T2008 power supply requires specialised component replacement techniques. Before attempting repair, refer to Section 3.4, “Repair”.
*
; + ; 2 # $ % % # $ % % # $ %
' $ < ' ( ! * + ! ! * & + ! ! * " % # % & &*$ + ! ! * & , & % ( + ! ! * + ! ! * & - *
( ) ( = 0 :
LED Black Secondary G re en Yellow Brown Green Transformer T4063 Primary Brown Blue Blue Thermal Shutdown Set Transformer Secondary LED Black Yellow Earth Mains Black Mains Ferrite Bead Earth Shield Transformer Green Green/Yellow LED Red C2 C4 C5 C7 E ~ Red (+) F1 Fuse To Mic Clip To Mic Clip + Out Ext. Speaker Gnd Internal Speaker 4 Way Power Connector to T 500 Radio 7 way Power Connector to T2000 Radio - Out Ext.
! " # $ %
! " # ! ## $ %
! 5= 7 , ( The spare external pin in the T2000 power connector (refer to Figure 8.4.1) may be wired to any of the option connections tabled in Section 5.9, “Options Interface Specifications”. The most commonly used connections (hush, horn, emergency and auxiliary), are explained below. The T2010 and T2015 can be programmed to have channel selection controlled via S15 on the T2000 logic PCB.
! The spare external pin in the power connector is connected to an option by linking the appropriate option pin to the EXTERNAL pin on options connector S14 (refer to Section 5.9, “Options Interface Specifications”). The recommended linking method is to crimp a short length of 7/0.2mm PVC wire between the appropriate connections on a 16-way Micromatch plug (IPN 240-00026-24), which can then be plugged onto the options connector.
; < ! " #$ % ;* ;+9 % This Section describes how to convert a T2000-500 or T2000-600 radio to operate between 1 and 7W. T2000-500 and T2000-600 1 to 7W radios are currently type approved only in Australia and Germany. The following topics are covered in this Section: Section Title Page 8.3.1 Components Required 8.3.2 8.3.2 Fitting 8.3.2 8.3.3 Set-Up 8.3.4 8.3.4 Specifications 8.3.
! ! ) 6 ( " #$ % To convert a T2000-500 and T2000-600 to low power, the following components are required: Description Low Power Common Parts Quantity 56Ω SRF16 resistor 030-02560-20 2 T2000-500/600 replacement transistor PCB 220-01287-00 1 radio type label - 1 appropriate type approval label - 1 T2000-500 Low Power Parts 5p6 NP0 500V GRM42-2 chip capacitor 015-01560-06 2 22p NP0 500V GRM42-2 chip capacitor 015-02220-06 3 T2000-600
2 ! " #$ % Refer to Figure 8.3.2. Remove the following components from the bottom side of the PA: C323, *C324, C325, *C327, *C329 and Q306. C323 *C324 *C329 Q306 *C327 C325 !" # & $ % 3 Remove the output matching capacitors, *C330, C331 and *C332 from the top side of the PA (shown in Figure 8.3.1).
b ! " #$ % Solder the chip capacitors onto the replacement transistor PCB, in the positions shown. Refer to the table below for capacitor values and the distance ‘d’. T2000-500 T2000-600 22p 18p 14.5mm* 11.5mm Capacitor Value Distance (d) * d is 13mm if Q305 is a BLW81 transistor The distance ‘d’ shown in Figure 8.3.3 is measured from the edge of the transistor top cap to the centre of the capacitors.
& ' ( ) ; ) 8 ? The T2000-05 remote speaker kit provides a 4Ω external speaker for T2010, T2015 and T2030 models. ! ) 6 ( The T2000-05 kit contains the following components: Quantity 1 T2000 speaker complete with mounting bracket and thumb screws 2 M4 self tapping screws 2 ‘U’ type captive nuts for self tapping screws 5m speaker wire complete with receptacles and speaker socket 1 Description .
4 & ' ( ) Refer to Figure 8.4.1. Remove the existing internal speaker link and insert the three speaker wire receptacles into the appropriate power connector holes, as shown. If the internal speaker is not required, cut the internal speaker ground link. Internal speaker link (T2010, T1015 & T2030: cut to disable) Not normally fitted { Ignition External Power supply: External speaker: ' 5 13.
! ( * + ) ; * 7 8 ' $ ? ( The T2000-06 desktop microphone has an internal omni-directional dynamic element, pre-amplifier and compressor loop. The microphone output is adjustable by a potentiometer (R11) which is accessible through a hole in the bottom of the case. The desktop microphone has a switch provided for hookswitch monitoring, which can be locked if required. .
3 ! ( * + ) Adjust the output level at the microphone to approximately 80% deviation (±4kHz for wide band or ±2kHz for narrow band). , Under some conditions, the microphone may pick up excessive background noise. In this situation, the output can be reduced using either of the procedures described below: 1 Change the value of R12 from 10kΩ to 47kΩ (refer to the circuit diagram). This will result in a 10dB output reduction.
! ( * + )
! ( * + )
* # *, * + ) * ; + 7 '. ' $ ? The T2000-07 DTMF microphone has an omni-directional dynamic element and internal DTMF tone generator. The DTMF tone level is adjustable by an internal potentiometer (VR1) which is accessible when the rear case is removed. The DTMF microphone is intended for use with all T2000 Series II radios. * . & The T2000-07 has grommets for both Series I and II radios fitted to the microphone cord.
* # *, * + ) The value of the resistor adjusts the sidetone level and is between 100kΩ and 470kΩ, typically 220kΩ. 2 Slide a length of silicone sleeving over the resistor, and connect a wire between the resistor and S11 pin 5 (RXD) on the pot PCB, as shown.
# *, * + ) *
* # *, * + )
+ -. ) + ; ? The T2000-34 kit provides selective tone calling (Selcall) facilities for T2010 and T2015 model T2000 Series II radios. The Selcall kit consists of a small module and a 5MHz crystal that are fitted to the radio’s logic PCB. This option allows selective individual or group calls within a fleet of radios, on channels that have Selcall programmed. Selcall parameters and features are set up and enabled during programming.
+ -. ) + ! ) 6 ( The T2000-34 kit contains the following components: Quantity Description 1 T2000-34 Selcall module 1 5MHz crystal with insulator + . & Refer to Figure 8.7.1 and Section 7.10, “T2010 & T2015 HC05 Logic PCB”. 1 Remove the top cover of the radio by unscrewing the four cover screws, unscrew the logic PCB and fold-out. 2 Unplug the connecting looms, if required.
Q510 Q520 R533 R581 R534 R582 R579 P2 R625 IC511 R526 R578 C622 C521 R632 C621 R634 R571 R528 R508 #RV508 R506 R527 R505 C517 R522 R633 R531 #SPEC1 #SPEC2 #SPEC3 #SPEC4 #SPEC5 #SPEC6 #SPEC7 #SPEC10 #SPEC8 #SPEC9 IC601 R611 R521 C618 C613 C614 C540 C541 C506 R626 C616 R602 R621 C504 C615 ) + C507 R620 IC504 X501 R530 L501 R619 R609 C617 R623 #R596 R525 R694 R624 C503 R583 Q507 R599 C509 #R595 R524 RV507 R572 C
+ -. ) Parameter Selection Deferred Calling enabled or disabled ANI Sequence leading, trailing or random encoding Emergency Sequence enabled or disabled Alert internal and external durations Tone Blanking standard * These tone periods are not defined by international standards. Wherever possible, use the international standard tone periods.
-! ) ; * ? The T2000-36 Selcall PCB plugs into an options connector on the top side of the logic PCB, and provides selective tone calling (Selcall) facilities for T2010,T2015, T2020 or T2050 model T2000 Series II radios. This option allows selective individual or group calls within a fleet of radios, on channels that have Selcall programmed. Selcall parameters and features are set up and enabled during programming.
-! ) ! ) 6 ( The T2000-36 Selcall kit contains the following components: Quantity 1 T2000-36 PCB assembly 12mm 1 Description PVC foam tape . & Refer to Figure 8.8.1. Remove the top cover of the radio by unscrewing the four cover screws, unscrew the logic PCB and fold-out.
-! ) 2 Position the foam tape provided on top of XL2, on the T2000-36 Selcall PCB. 3 Carefully fold the logic PCB back in position and secure using the three logic PCB retaining screws. Refit the top cover. 4 Refer to the T2000 Programming Software User’s Manual (IPN 439-22000-02, or later) for set-up information.
!/ ; * # 0 : + + + + + + + + + + + -! ) ; ; 2 ( % / ( % / , (
%) ( ! % % -! ) $
%) -! ) * ( ! % % ! ## $
-! ) +
-! )
- . *, ) - ; 7 '. ? The T2000-40 DTMF kit provides DTMF dialling facilities for T2020 model T2000 Series II radios. It consists of a small module which is fitted to the control head PCB. Once installed, all parameters (such as tone durations and hold times) can be programmed as required. - 1 . & Remove the four screws from the back of the control head and remove the back cover, taking care not to lose the captive nuts.
- .
. / '0 ) ; @ ! ! < 3 ? The T2000-A450X CTCSS and scrambler PCB plugs into an options connector on the top side of the T2000 Series II logic PCB, and can be configured in two ways: Product Code Option T201X T2020 T2000-A4500 CTCSS x x T2000-A4502 Scrambler T203X T2040 T2050 x The CTCSS option is used in trunked radios, and has 38 independent receive and transmit tones, set by solder links on the T2000-A450X PCB.
. / '0 ) ! ) 6 ( The T2000-A450X kits contain the following components: Quantity Description 1 T2000-A450X PCB assembly 12mm 1 PVC foam tape . & Refer to Figure 8.10.1. Remove the top cover of the radio by unscrewing the four cover screws, unscrew the logic PCB and fold out. 2 Select the T2000-A450X link options, as described in Section 8.10.3, “T2000-A450X Link Options”.
. / '0 ) ; @ # 8 There are 2 groups of links on the underside of the T2000-A4500 PCB, the receive (R) group and the transmit (T) group. Each group contains 6 bits that are pulled logic high or low, by either solder links or zero ohm resistors. The receive settings are set by links R-0 to R-5 and the transmit settings by links T0 to T-5. A short to the 5V line represents a ‘1’, and a short to ground represents a ‘0’.
. / '0 ) Tone Number R-5 T-5 R-4 T-4 R-3 T-3 R-2 T-2 R-1 T-1 R-0 T-0 CTCSS Frequency (Hz) 16 0 0 1 1 1 1 114.8 17 0 1 0 0 0 0 118.8 18 0 1 0 0 0 1 123 19 0 1 0 0 1 0 127.3 20 0 1 0 0 1 1 131.8 21 0 1 0 1 0 0 136.5 22 0 1 0 1 0 1 141.3 23 0 1 0 1 1 0 146.2 24 0 1 0 1 1 1 151.4 25 0 1 1 0 0 0 156.7 26 0 1 1 0 0 1 162.2 27 0 1 1 0 1 0 167.9 28 0 1 1 0 1 1 173.
. / '0 ) !/ ; @ # 0 : # # # ( ( # # ( #
* .
. / .
. / '0 ) .
. / '0 ) -
. / '0 )
1 2 3 ) ; > ( ? The T2000-50 handsfree kit is designed for use with all T2000 Series II mobiles, and allows communication through the normal PTT microphone, or ‘handsfree’ operation through a directional microphone. When ‘handsfree’ operation is being used, the transmitter is activated either by the footswitch (Manually Operated Transmit) or automatically, by detecting the sound of a voice. The latter is known as the Voice Operated Transmit (VOX) mode.
1 2 3 ) ! ) 6 ( The T2000-50 kit contains the following components: Quantity 1 T2000-50 PCB assembly 1 directional microphone (with optional sunvisor clip or tie clip) 1 footswitch 1 9 way D-range assembly with 2 in-line connectors & microphone socket attached 1 shroud (alternative shroud - not required for T2000 Series II radios) 1 2 way in-line connector 3 M3x8 pan Pozi Taptite screws 2 4-40x¼ pan Pozi Taptite screws (black) 1 Descrip
3 1 2 3 ) After manufacture, the T2000-50 PCB links are left open and will need to be customer selected. For details of optional links, refer to the Link Options Table in the circuit diagram. Non-trunked radios: standard links are 4B and 5A. 4 Set up the T2000-50, as described in Section 8.11.4, “T2000-50 Set-Up”. A +5V logic signal is provided to indicate VOX activity (S21 pin 7).
1 2 3 ) ) ( & & The radio may need reprogramming to accommodate the handsfree unit. The key for the T2010, T2015 and T2020 or the key Fn for trunked radios must be programmed for latching if VOX mode is to be used. Refer to the T2000 programming manual. For T203X and T2040 radios, the ‘handsfree’ option will also need to be selected under ‘Specifications’ (refer to the ‘Specifications’ section of the programming manual).
1 2 3 ) ; ;4 56 ) 6 ( T2000-50 set-up should only be necessary after major repair. • AF signal generator • modulation analyser • high impedance voltmeter (e.g. VTVM) • oscilloscope • power supply (+13.8V) • RF power meter or load • 30dB RF attenuator The following diagram shows a typical test set-up. 12 $ 3 1 Set up the equipment as shown in Figure 8.11.
* 2 1 2 3 ) Switch on the MOX (Manually Operated Transmit) PTT and check that the modulation is at approximately 60% of full system deviation. Check that no audio path is evident through the normal microphone. Activate the PTT on the normal microphone and check that there is now an audio path through the microphone. 3 With no audio, adjust RV67 for 0.8V at TP5. Remove the TCXO PCB to operate the /IN-LOCK signal and check that the DC level now goes to 6.5V ±0.5V.
1 2 3 ) + & The following table describes S21 pin-outs, and relevant interface signals on S13 and S14 (T2000 logic PCB). S21 is the 9 way D-type connector mounted on the heatsink at the rear of the radio. Pin No. Signal Description Level S21-1 GND S21-2 MIC S21-3 GND S21-4 GND S21-5 GND S21-6 FT-SWTCH S21-7 VOX S21-8 GND S21-9 GND S13-6 TX-LINE-IN Electret microphone audio switched in during handsfree transmit.
1 2 3 ) * Current .. <30mA Operating Temperature Range .. -30 to +60°C ambient Audio: Input For 60% Deviation Microphone Microphone sensitivity Distortion .. .. .. .. Delay From Audio To PTT Request .. 20ms (typical) 1mVrms ± 0.1mV (1kHz, 600Ω) uni-directional electret -67dB ±3db (0dB = 1V/µbar) <5% + ! 7 Audio is fed into the preamplifier circuitry (Q1) from the electret microphone via pin 2 of the 9 way D-range (S21).
1 2 3 ) - 8 & ! ! Optional circuitry is provided by IC7 to inhibit the VOX signal from the received audio, instead of BUSY. LINK4 is removed to disable the BUSY inhibit and the RX-AUDIO inhibit is enabled by changing LINK5A to LINK5B. Receiver gated audio is buffered by IC7 pins 12, 13 & 14 and split off to feed into the VOX noise path (IC3 pins 5, 6 & 7) and also to a precision rectifier formed around IC7, pins 1, 2 & 3.
1 2 3 ) !/ ; # 0 :
1 2 3 ) ; ( ) ( = 0 :
' - $ 0 1 2 3 ) ! % $
' - $ 0 1 2 3 ) ! % ! ## $
