Home

TKR-750 service manual

Contents

1.
2. DISPLAY UNIT FINAL UNIT X54 3330 20 A 2 X45 3620 XX A 2 eF1 9 e gt NA gt gt gt gt gt gt gt x M SE SE x a ME a j3 5 3 E VOLTAGE IRAE 5 5 REGU
3. 557 INC OUT ACC ITNT TOUT 1 ayon mn e 0629 eD614 00618 0621 0624 eD625 5 M DSP ADSZ C684 100p DA204U DA204U DA204U DA204U DA204U DA204U QOO gt Vena R683 120k elelelele SPG VSS16 gt BFSXO 1C618 605 4 6 ae 320VC5402PGE DT R717 47k E40 5704 05 HRDY R718 47k C726 C724 DVDD3 1800p lt ES 558 0606 D607 Deos D 11 0615 0619 0622 3 DA204U DA204U 2040 DA204U DA204U DA204U DAZ04U 2 0601 DTC114EUA E wi gt gt 22 Jo gt 226 a XX ares BDX4 Seek zu 3 av o lt lt lt 604 on
4. E04 0154 05 1920 23 25 DTC114EUA Q18 25B1386 R Q24 DTD114EK 00 SA7025DK IC300 SA7025DK R144 22k 0 1 TX SWITCH FINAL UNIT eA2 SUB UNIT TX VCO PLL X58 4790 10 SUB UNIT RX VCO PLL X58 4780 10 GPS wee LE Sas ASR Nat RMS 98 0 31 a 011 ae EL DB 4016 ese a cs gt cs gt gt B 1 53V DAN23SK DC SWITCH 25B1132 0 R 1C6 D A SHIFT E 0 74V CONVERTER RESISTER EDI 525 M62354GP BULO94BCF 15 R368 2 E40 5703 05_9 INVERTER BUFFER FINAL UNIT 0354 mmc 33 BUFFER 51 22 A 18p 020 E L352 33 BUFFER R159 X45 3620 XX I L I R351 1352 MODULATION ats 528 mem TX VCOL in y LAMP ICA S GND 2 R351 2 R354 33 aide cnast 6 2dBm 10p DTC114EUA S A 2 CNS m SES 0355 ict e I FAR STD Dy 5165 GND 2 2 GND 011 5 ou 0350 ume 22 055 2 0 Sd Sr 85 0355 2503120 DC SWITCH DC SWITCH teeta 3 ZSK508NV KS2 38953426709 don VO 1 gt lt RE AMP 023 017 eCN16
5. Therefore the operation of the repeater can be continued If the battery is used but both the battery and power sup ply need not connected if an external switch is used or if H CN604 only a solar battery is used connect it to the Backup con CN606 nector not the Main DC connector Current consumption 5 9 MA be reduced by approx 120mA because the relay is not 2 used E I If it is installed when the temperature at the repeater site CN605 1 is below freezing check whether the switch relay works properly after installation 2 Voice Scrambler It operates only during base operation The voice is not Fig 1 scrambled when it is repeated 2 1 Modification DEP S 1 Remove R742 and R653 on the TX RX unit B 2 control 1 section TXI MIC signal input TXO MIC signal output 2 2 Connection RXI RX audio signal input 1 The functions of pins of CN601 on the TX RX unit B 2 AC Audio control signal output control section are shown in the figure BC1 Scramble code output 1 2 Join the CN601 connector to the voice scrambler board BC2 Scramble code output 2 via the E37 0808 05 connector cable BC3 Scramble code output 3 BC4 Scramble co
6. de RX ANT SPG TX RX UNIT B 2 TX RX UNIT A 2 X57 626 x wx x X57 626 x x CN6 MAIN DC y3 CN15 w ENS gt gt lt oc sa 1 B 3 wi CN602 q po BD LA gt gt gt 36 2 LAY UNIT A 2 2 E I e AG 96 By dE 3 CN7 o BATTERY Er BES urs pe 2 2 NC NC BACKUP lt 3 3V AVR s 5C T 58 SB AVR 4 FINAL UNI FINAL UNIT B 2 SB se WT 45 362 3 30 NC e NC CN16 x 3 3V AVR NC NC 1 X45 362x TR CN600 VTH SND S GND 9V AVR BAT GND GND 5 SB m MO MO FAS EDT SB 5B b 1 8V AVR 2 MB MB gt gt lt FAS NC GND GND GND RE PC GND NC SOE SOE 8T lt sv AVR RSW DAT TEMP o TEMP RSW RSW B 5 DAT PSW psw E E 22 STAV 22 BUP Bue SUB UNIT i I STB1 CLK E LD2 LD2 ENA PTT TXD SOE FWD FWD RX VCO PLL SOE TXD1 STB4 STB4 HOOK RXD K1 CK e CK 58 478 CN19 CNA lt Wa K1 RXD1 DT DT TX ANT 2 Losa LOT LOT K2 1 LDR LDR KS K4 EPT gt K4 K5 EPR EPR 5 ce a 5c DP DP MIG NC e NC SUB UNIT MIC RSSI RSSI 20 ASQ e ASQ TX VCO PLL GND GND NC e NE X58 479 DET DET NC NC 36 4 CN14 CN606 29130 NC NC oe oo NC onc NC RXD2 NC ool ge RXD TXD2 g o TXD1 PTT sc
7. A B D E G H L M N O P Q R 5 TKR 750 PC BOARD VIEW 2 H i TX RX UNIT X57 6260 XX B 2 10 K E 11 K2 Component side view 1 806 B 204 225524 800 ANI 00 SIN C627 8 5 ote 8C o EO a w m ima zi E 2222223111 iQ R E IC630 Slo o 5 SI ME I C789 E 8 E ele E E A 1C629 ca 3 S iL 8 Oss 3 3 SCI C801 785 SJ j Le Sp 795 D600 C798 P KO 3m R654 DE 55 5 603 10 N603 C811 GND DEI lt 0614 D618 OUT cc 8 8 2601 y B R785 E 6 605 E Was SSIs 2858332215560 lt n n lt lt nun 2 E Sonn Fw 60 CN604 a gt gt 7 e o 5 im NN 5 e2lanm fi El 5 Bm 702 Z x lt lt lt E Ec BE m 55 B 1 9 8 AE 00 joo CES ROM R750 S ex S I 10623 CN605 823 518 E o 1 pul S EE 99 6635 2 2 C646 E i ez R755 R769 C691 R676 R669 R671 9 601 NES C652 2672 J 72 0757 01 B 2 Address Ref No Address Ref Address Ref No Component side 10 Pattern 1 Pattern 2 Pattern 3 Pattern 4 Foil si
8. Wide 50dB Narrow 45dB Spurious amp Image Rejection 90dB Audio Output Ext Speaker AW at 40 less than 5 distortion Audio Distortion Ext Speaker Less than 2 5 at 1000Hz Band Spread pens 3MHz TRANSMITTER Measured by TIA ElA 603 RF Power Output AA 50W adjustable to 25W 100 duty 25W Type of Emission Wide 16KOF3E Narrow 11KOF3E Spurious Response 80dB FM Hum and Noise Wide 50dB Narrow 45dB Audio Distortion Less than 3 at 1000Hz Microphone Impedance 6000 Band Spread 28MHz K2 14MHz 93 TKR 750 SPEGIFICATIONS E TYPE GENERAL Frequency 146 to 174MHz Number of Channels 16 channel Channel Spacing Wide 25kHz Narrow 12 5kHz PLL channel stepping 5kHz 6 25kHz Operating Voltage 13 2V DC Current Drain SA e 0 8A Standby w power Save 0 3A Operationg mode DC IN Backup FAN Temp SAVE ON DISP OFF RECEIVE spa ea en edic e eed 1 2A Transmit Receive Less than 13A Duty Cy Clete m oo ad Receive 10096 Transmit 100 1
9. 610 100 4 CP611 100x4 CP612 1k 2 a R659 47k R745 47k 0605 0611 C814 5 06 2 2 E pose aun 1 R660 27k DTC414EUA 1000025 Z R661 47K m 1 626 1630 VOLTAGE 3 3V AVR 2 DETECTOR 75 P613 3 33v 62 02 5 07V TA78LOSE ov 9 E 2 y 3 5 VIN our IN s 5 a lt 2 8 8c Sale lt zh m 2 z232 0606 m CN603 505 2 DTC363EK E40 5887 05 AF MUTE SWITCH B n DC SWITCH CP614 1kx2 1C624 628 630 SB GND GND R662 1k Q600 2SK1824 R602 VOLTAGE REGULATOR 100 2 X54 3330 20 2 502 4 7k X osx lt m m Ix p n gt i N m im O lt lt N I E li E ez pp SE E Quo Ku c lt c O Q UU Rs C647 100P CODEC x eR801 1k SPG YN OP fF a 20 HE Z lt 4 lt Z 1 614 B II W uj gt 2 R673 100k SPG a T E a NC17 AK4550VT NC8 IHCNTLO VSS6 IBCLKRO IBCLKR1 BFSRO 1 608 TA75SO1F 4 AF AMP RD RSS SPI AO1 5
10. NODO TKR 750 PARTS LIST TX RX UNIT X57 6260 XX Desti nation Desti nation 010U C753 754 C92 0628 05 10WV F Address Parts No Description Ref No Address Parts No Description CK73GB1E103K C92 0628 05 CK73GB1C104 CK73GB1E103K 92 0628 05 755 CK73GB1H471 F 100 756 757 C92 0628 05 10WV 010 C758 CK73FB1C105K F C759 CK73GB1H471 C2 0309 Cf 73GB1E103 92 0628 05 C73GCH1H101J 73GB1E103 C73GCH1H330J 010 C760 CK73GB1H102 C761 CK73GB1C104 P C762 763 CK73GB1H102 010 C764 765 CK73GB1E103 F C766 768 CC73GCH 3 CC73GCH1H101J CK73GB1E103 C92 0628 05 92 0519 05 92 0003 05 769 771 C92 0560 0 C772 C92 0633 0 C773 92 0514 0 0774 CK73FB1C 775 779 C92 0519 0 780 782 CK73FB1C C783 CK73GB1H C784 CK73FB1C C785 786 CK73GB1C C787 CK73FB1C C92 0628 05 92 0546 05 CC73GCH1H101J CK73GB1E103K CC73GCH1H101J CK73GB1E103K 92 0628 05 CK73GB1H471K C92 0628 05 CK73GB1C104 C788 CC73GCH C789 CEO4EW C790 CC73GCH C791 CK73GB C792 794 CK73GB 795 CC73GC C796 797 CK73GB C798 CEO4EW C799 CK73GB C800 CEO4EW CK73GB1E103 92 0628 05 CK73GB1E103 92 0628 05 CK73GB1H471 73GB1E103 92 0628 05 73GB1E103 73GB1H471K K73GB1E103K C80 C92 0560
11. EEE i AVR i i C625 2582 1C6 10628 CN14 C3357 XC 62FP3302P TA78LOSF XF1 WIN AMP Sv 8c 0606 LC622 3 3D VR oot as M 8C ane DTC363EK TC7S66FU AVR AVR T SPO 629 C626 1C630 SIGS IN ile ode gt DAT CLK LA4422 XC62FP3302P 5514 4 E ee i RSS SOE STBZ 3 3V SV RB A S X 3 344 AVE AS DTC 144EUA E e Shift Reg 5 752 610 DTC114EUA I MIC JACK T TEST SPKR K 1c623 TAS 2591906453 ge Asr 1 H i VR601 A01 5 BU4094BCFV sw SB t FORA DC Lalrcxo _25K508NV K52 SPM 10627 AMP 0350 353 18V282 AF VOL 0609 12621 TA78LO5F esee CF1 Wide X2 i i DTC114EUA TC7SOOFU Sy r7 Gx NJMZ558E 16 8M PTT TXD 0626 SM AVR ASQ4 44 395MHz 55 07 SWB nzask TX VCO 2503120 i lt gt 4 58 742 28 4617 5 X 206 1 Buff AMPSW SOE i STBA 1 7 4 4 018 ce M CK SRR SIT CF2 Narrow 25B1386 R H pr CN601 DT 80409 SRC PE i 10608 ne WIN 87 i Fin in ds Sw pta amu Prt x54 CN501 i SA7025DK 10350 351 i 4 Mr Gem Ja UB W N dis 7 25 508 652 i AI
12. N O O ON Connector Terminal Terminal No No Name O Q N 50 TX VCO output Ground Terminal function No connection Serial data to radio Serial data from radio Programmable function input 1 Programmable function input 2 Programmable function input 3 Control line ground TX data input data or signalling Input impedance 600Q Coupling AC coupling Deviation 0 75kHz wide 0 35kHz Narrow 100Hz 0 5Vp p input TX audio input voice Input impedance 600Q Coupling AC coupling Deviation 60 deviation 1kHz 280mVrms 25mV input RX data output voice amp data Output impedance 1kQ or less Coupling AC coupling Frequency response 2 5dB at 10 3000Hz Output level 70 90mVrms standard modulation RX audio output voice Output impedance 1kQ or less Coupling AC coupling level 360 440mVrms standard modulation Outpu RX signal ground for RA RD ground only Speaker mute signal input L Mute on No connection ACC 1 15 16 17 18 19 20 21 22 23 24 25 Terminal EMON EPTT SC NC External monitor switch input L Monitor on Monitor off External press to talk switch input on H PTT off Squelch control output L Busy Not busy No connection TX signal ground for TA TD ground only Programmable function input output 1 Progr
13. 300 REF c3 C4 S I I m R301 100 I AERIS R301 100 5 5 de NOISE DETECTION ri 2p 0 5p 19 o v L34 4526 05 L34 1326 05 2 2 2 n de 4 ICE og a 2858 5 NOISE SO SO CLOSE I eR319 33 eR319 33 400p 35 o um 474 B 1 95V 1 807 soy Soy E 1 35V 1 23V m C316 C313 C316 C313 m 19 03 gt 3 25V 3 85 12 5165 BUFFER m 5 FA 9 Umm 7 Lj 2503356 824 S x 8 7 7 4 T o 9 m 0302 AICS Me p I N mics 5 5 I ron 1164 MSN 0302 0 Mle B 0 75V vx _ _ 25 4215 C321 4 L302 L301 vl s x x 25 4215 th L302 1301 Se ae x m u i 3 39n 39n 39n 39n we x x eXF2 47 a 0 ef 3 TS 2503357 7 171 0512 05 77 exi SYSTEM ace 4 1 5 di a Bla Afi AMP 44 85MHz 44 395MHz 2 I RF Nag 238 ams Sas m AMP Nes DSM N m WIDE IDE 05 a o T 53 58 ae DTA144EUA 1000p 18p ue 124 5 5 2 5 pf 2 x L34 4530 05 42 I 1 77 eL20 o li of of of SL hl gt 15k du eC64 LO du T n a ef m m etm D1 Sis eL19 2 21 S 2 3 5 i R37 WIDE NABRON L34 4526 05 22 252795 ecF1 4 DC_SWITCH 3
14. gt 4 220 14 R305 305 220 R305 C305 PASOS R11 R7 133 121 ecn R60 S D u 3 ee Ur pH o eR306 15 0 1000 FIN OT t d IM eR306 0 1000 FIN 22k 10k 10u E 02 100 Wk as 8 5 BE Sy ACTIVE Jes mas 1F eR344 0442 gms C108 C110 4 DAN235K Win TON ROW 255 Hol 2 E ES 5 FILTER 22k 22 16 C304 5c th BUFFER AMP 22k 22 C304 sc CURRENT CONTROL 558 mig 2 T T 325 SWITCH 2222 I eR320 0301 1000 R320 0301 1000p 010 Mies 3 3 211 R150 HT ihe po ad 25C4116 GR 6310 17 LDT VW 25C4116 GR eR310 LDR 2SA1586 d SIR AS ik 4 1 l eni i29 130 L31 522 saem oM 835 S 2 2536 ii 39 CLOSE 9 00 6 8k 6 8k e e 5 2 5 Hr Qaa 5 2 18 R304 100 EPT Fa d OL Cu R304 100 EPR B 5 27V HAN 33n 33n Pa D em TS Age eme o Uo y 013 14 16 C17 a e me y 19 R303 100 DP ma s R303 100 DP 255 C 1 61V s 258 ome c9 ojej y OTT BTS ol wily Sm 532 9448 J 2 738 PER SRS SS 5 7 8 ox E z 558 p 2p 5 mse 225 130020 R302 100 cP 05 PSA R302 100 1 R83 M TT Nie 7 7 7 0 1000p ae 7
15. 1 RS232C TRANCE VER 1C620 ADM202EARN HCNTLO AOUTR A I NR AOUTL Vss CPU A6 Xin 1C604 A7 Vcc 30622M4 113GP Vss C643 R668 as 5 08 Q7 VSS Q4 Q3 02 Q1 5 CLK DATA STRB DET eR654 3 INC VEE INC OUT CN602 E40 6009 05 NC DET 10410 18k TEST SPKR IAINL PWDA vss PwAD VDD SCLK DEMO 36 C616 0 01u o 20UT R21N T21N T20U C648 0 01u EEP ROM 1C600 AT2408N10S12 5 8 NC BFSR1 BDRO IHCNTL 1 BOR 1 IBCLKXO BCLKX1 T1IN R10UT R1IN c2 SPO AO3 4 SDTO HCNTL1 DEM1 LRCK SDTO SDT C685 0 01u 1C610 TA75SO1F 5 Mao vcc A1 TEST AF AMP VDD 16 1 e1C623 BU4094BCFV SHIFT RESISTER T10UT C1 GND M VCC C1 AOS 604 40 5702 05 R680 22k 4 ING VCC 2 Wee 3 2 SCL 4 504 C662 R678 10u10 100k 1000 1000 1000 1000
16. C73GCH1H150J C73GCH1H030C C73GCH1H270J 73FB1H473K C73GCH1H030C 15 GB1J474J CH 6W 3 0PF R3 GB1J331J 6W 27P R3 FB2A152J CH OW R317 252 05 CH R3 GB1J330J CH 6W C73GCH1H150J 92 0514 05 73GB1H102K 92 0514 05 C73GCH1H470J R320 GB1J102J CH 6W R32 GB1J 6W R322 73GB1J103J CH 6W R350 353 R92 1252 05 CH R354 355 RK73GB1J CH 6W C C C cc 73GB1H102K 73FB1E224K 92 0003 05 C73GCH1H050C 92 0514 05 R356 357 RK73GB CH 6W R358 359 RK73GB CH 6W R360 363 RK73GB CH 6W R364 RK73GB CH 6W R365 RK73GB CH 6W 73GB1H102K C73GCH1H390J C73GCH1H330J 73GB1H102K C73GCH1H040B R366 RK73GB CH 6W R367 RK73GB 6W R368 RK73GB CH 33 6W C c occ D350 353 1 300 151282 VARIABLE CAPACITANCE DIODE SA7025DK MOS IC TKR 750 RX PLL VCO X58 4780 10 TX PLL VCO X58 4790 10 PARTS LIST Desti nation Desti nation 2SC4116 GR TRANSISTOR L360 361 L33 1268 15 LL FIXED INDUCTOR 2SC4215 Y TRANSISTOR L362 140 8271 LL FIXED INDUCTOR 82NH 2SK508NV K52 FET 28 4116 TRANSISTOR R300 RK73GB1J DTC114EUA DIGITAL TRANSISTOR R301 304 RK73GB1J R305 R92 1252 R R Parts No Description Ref No Address N Parts No Description 10 6W 100 6W 0 OHM 22 6W 56 6W 25
17. L IPPLE 10503 TXDO Neh ae i AVR 1 1 BU4O94BCFV 50 5 so DAF DOE 0604 LD1 DAT CLK i X PDT Shift Reg 2 shift Reg 3 Shift Reg 4 i i 12800 CPU 25K 1824 ICN606 RSW 8T BUP VTH i i 16504 10505 12502 10617 BU4094BCFV BU4094BCFV BU4094BCFV B 2 i 0512 514 i i eie erit Bn AAA 27 i i 20200 IC604 Interface SFT RA id LT NA CN15 10617 DTA114EUA 4 K r E RD ccs 27 gt Final unit Q516 519 Q521 524 T i TC74LVX4245 DAC A 2 CN3 X45 362 B 2 A i 5 red UPA627T UPA627T pe ne 1C607 RAS nd arl ENI e miin KI a ot sw sw Q508 0506 0511 PER 00 07 sg M62364FP ey i i i i A0 D3 i i i i i IC2 i i 5501 5502 5503 5505 FLASH ROM 10607 Pu red TT OM mE T Main 15A i gt KEY 1 5 0 1 AT29C020 90T1 TD AMP i Pc BAT vin SW PF1 5 0602 LAT29C020 90T I PDT AVR CN7 Y psos 0504 0505 25K1824 WR RD CSO NJM4558E x 4 NJM78LOSUA BACKUP ES 507 Te AS EE E S dM TENRASP i a2 Q4 Q5 5 i Reset IC 1046 2SC3356 R24 25K3075 25K3478 i d i 1c600 1 601 DAT CLK CN1i Drive Drive AMP Final AMP 15 BU
18. Mic TXD Power supply voltage level input Mic HOOK RXD Aux input No 1 Acc D sub 25 pin EEPROM clock Aux input No 2 Acc D sub 25 pin EEPROM data GND Acc TXD Acc D sub 25 pin Aux input No 3 Acc D sub 25 pin Acc RXD Acc D sub 25 pin 5V PLL IC clock 5V PLL IC data Display shift register STB CPU ready input Shift register common OE Not used Not used Aux No 6 Acc D sub 25 pin 23 TKR 750 SEMICONDUCTOR DATA DSP 320VC5402PGE TX RX unit IC618 24 Pin Function Name Function Function NC1 NC2 Not used No connection Vss GND Frame sync for receiver input LRCK 16 128kHz DVDD VDD for I O pins 3 3V used No connection HCNTL1 Serial data receive input HPI control 1 data bus BDR1 Not used No connection Not used No connection Not used No connection BCLKXO Transmit clock input SCLK 516 09375kHz HPI address strobe Pull up GND BCLKX1 Master clock output MCLK 4 12875MHz Not used No connection Vss GND D for core CPU 1 8V HINT TOUT1 Boot mode select Pull up chip select CVDD VDD for core CPU 1 8V read write a ready Pull up BFSXO Frame sync for transmitter input 16 128kHz used No connecti used No connection Frame sync for
19. 6 SWITCH 134 4527 05 D3 L72 0366 05 e 004 06 DAN235K 7 7 DTC 144EUA DTC144EUA 6 gt 777 777 Se e WIDE NARROW SWITCH I DAN235K 04 omo mm p WIDE NARROW SWITCH M kr W 4 91V 824 8260 c8 X58 4790 10 X58 4780 10 E DAN235K N 0V HE ws V 2 Slem esas 2935 D1 4 8 DAN235K Q1 2 9 2SC3357 NJM2904E sig 71 0513 05 DT NARROW oz eios N 4 58V i D5 MA742 Q3 2SC3356 R24 IEZ NJM4558E D350 353 1SV282 D350 353 1SV282 E Rigi SPE gt x 10 18p D7 155355 04 6 DTC144EUA 11 NJM78LOSUA D354 355 15 214 NARROW lee phy 25 Seal 5 25 A D11 02025 1 05 144 0 1c4 NJM7808FA Q 28 DARRO x Q p p E p p D12 02DZ18 X Y Q7 2504617 5 1 5 AN8009M 05005201 Car 09005301 2364100 Gt SWITCH s Te 777 Q8 11 2503120 1C6 M62354GP Q302 355 25 4215 Q302 355 2SC4215 Y 4 I 010 2SA1586 Y GR 107 BUZ094BCF 0350 351 ZSK508NV K52 0350 351 ZSKSOS8SNV K52 dala ale Q12 15 2SC4116 GR 9 TK14489V Q352 353 25 4116 Q3524353 25C4116 Y 2 m n 89 0dBm 016 25B1132 Q R TA7808F 9854 DICTTA4EUA 9354 D
20. CVDD VDD for core CPU 1 143 144 NC17 NC18 Not used No connecti Final Unit X45 3620 XX Part name Description DC amplifier Thermostat Transistor Voltage regulator RF amplifier FET TX drive amplifier FET Final amplifier FET RF switch Transistor DC switch Diode Thermal sensor Zener diode Voltage reference iode Surge absorption RF detector D Diode D iode Surge absorption Zener diode Surge protector Diode Reverse current protection Ref No Part name D9 Varistor Current protector D51 52 Diode Reverse connection protection Display Unit X54 3330 20 Description IC501 MOS IC MIC amplifier IC502 505 MOS IC Shift registers IC506 507 MOS IC Voltage regulator Q501 502 Transistor Level controller Q504 FET DC switch Q506 DC switch Q507 DC switch Q508 Q510 511 DC switch DC switch Q512 514 FE DC switch Q516 519 FET DC switch Q521 525 FET DC switch D501 502 Diode AF detector D503 505 LED LED D506 507 LED 7 segment D508 514 Diode Surge absorption D601 602 Diode Surge absorption D603 Varistor Current protector 25 TKR 750 DESGRIPTION OF CGOMPONENTS TX
21. IC613 is a counter IC and the clock required for the CODEC and DSP is generated by dividing the 16 515MHz clock signal produced by DSP 618 603 and 606 are interface IC between the CPU oper ated at 5 0V and the DSP operated at 3 3V 5 7 Base Band Circuit The base band circuit switches between the modulation signal to the transmitter circuit and remote audio and ad justs their levels This circuit consists of IC605 IC607 IC611 IC615 and IC617 Modulation inputs include local microphone input low speed data LSD high speed data HSD external audio in put TA and external data input TD and demodulation out puts include receive audio output RA and receive data out put RD The multiplexer IC605 changes signals the electronic volume 615 adjusts the level and the operational ampli fier IC607 IC611 IC617 amplifiers and sums signals 5 8 RS 232C Circuit The RS 232C circuit connects the RS 232C serial port of a personal computer directly to this model to perform FPU operation The FPU operation can also be performed by con necting a programming cable KPG 46 to the local micro phone on the front panel But if the D sub connector on the rear panel is used the programming cable is not required The 232C driver IC IC620 changes the TTL 232C level The firmware can only be rewritten with the local microphone on the front panel 5 9 Power Supply Circuit The power supply circuit
22. s VOLTAGE 3 S E VOLTAGE E40 8009 05 9CLT e 0351 6 RE AMP E MO 6 6 MO 0 104 a 3 z 2SK508NV K52 C375 I AR e w o REGULATOR 5 REGULATOR 5 sc s AB sC bet n 9 SES o NASA 11 noes R91 ri FREQUENCY nw Se TIC oU FS o0 5 OT Poo s 1 OC SWITCH FREQUENCY n SEN mlt CO maa 5 Mm MS NGT C369 15 4 7k a CONTROL Z Sal P CONTROL RAJ 1 98i 0353 TT DC SWITCH 777 OMe e o Je 2504116 7 0351 521 9 R357 1351 0353 C355 2SK508NV K52 08 0353 1 R352 1351 D353 C355 367 C369 R352 1351 US 4 Nm gt it e of 1 11 0 100 11 Son 7227 BUFFER y NICS 2 SKE R 7 93v 1C10 13 55V ec 0 104 15 282 18p m 18 0351 9 15 282 mho os N BUFFER AMP 1 RIPPLE FILTER RIPPLE FILTER E TA7808F NJM7808FA 576 0401 05 Q o FREQUENCY s VCO OSC p a FREQUENCY Ih 95 C100 013 015 3 CONTROL ST bee SSG UL 8 CONTROL m ME I NJM2904E NJM4558E RER eH 23C4116tGR 25C4 UIS COR 2 E moe BSS Me _ o 2 z r 15p 27 o za o n Ft Dea olin VCO OSC Ba a 212 5 e ome DA Rao Dat a eso
23. 08 09 21518 5 5 Q MT b 11 055 e B i 2SC3120 2SC3357 5 VOLTAGE lao m 52 ae iiid 1 2 928 REGULATOR 5 x e ES QT mn ml ATR NT m SWITCH B x x ax e x S RES mimm R VOLTAGE RIR LE 5 EN ol 2 Sia a lo 5 REGULATOR S 155355 1 8 51515 51515 5 515 Hua 42 _ N x 9x 2 45 N 2 gt 5 N E I 20 ke ES NES u 552 5 sjel 8 188 N 5 al BD Q gt lt lt lt gt 0 010 x ut 1 1 82 id ACTIVE FILTER PEL Te BUFFER AMP 4399 PLL c300 I 77 MEGULATOR SA7025DK SA7025DK 024 025 z R316 25C4116 GR 2504116 GR ne agde E B 1 2 E 4 S gt DTD114EK DTC114EUA 2 2 5 5 5 5 5 212 552 Es ES C 4 84V E 515 DC SWITCH DC SWITCH x I Se C 6 16V rile s ac bas g 1 8 amp ELI MEME Sg x m m ma m 320 eC318 TS R316 C320 C318 Tio x 4 EB H eo je H 13 0 01u H 2 01u t al al I 2 2u10 2 2u10 R309 I I 1 5k 2 2u10 2 2010 8309 i L33 En
24. 2 VCO A CH TX VCO A center VCO B CH TX VCO B center Transmission Narrow 25 DOT deviation Wide 1 VCO A CH TX VCO A center VCO B CH TX VCO B center Deviation meter filter HPF OFF LPF 3kHz De emphasis OFF Detector Peak hold Transmission 2 VCO A CH TX VCO A center VCO B CH TX VCO B center Transmission Narrow 26 CW ID deviation Wide 1 VCO A CH TX VCO A center VCO B CH TX VCO B center Deviation meter filter HPF OFF LPF 15kHz De emphasis OFF Transmission 2 VCO A CH TX VCO A center VCO B CH TX VCO B center Transmission Narrow MOD ANA or Deviation meter Oscilloscope AG AF VTVM PC adj 2 05kHz 0 1kHz PC adj Make the de modulated waves into square waves Oscilloscope DC range flat part A PC adj 0 75kHz 0 05kHz PC adj 0 35kHz 0 05kHz PC adj 0 75kHz PC adj 0 35kHz 0 05kHz PC adj 2kHz 0 1kHz 0 05kHz ADJUSTMENT TKR 750 Measurement Adjustment Item Condition E um Unit Terminal Unit Parts Method Specifications Remarks 27 Test tone 1 VCO A CH TX VCO A center MOD Rear TX ANT PC agj 0 1kHz deviation VCO B CH TX VCO B center or 3kHz Wide Deviation meter filter Deviation HPF OFF meter LPF 15kHz Oscilloscope De emphasis
25. 4 gt pens Fig 6 Transmitter PLL TKR 750 CIRCUIT DESCRIPTION 5 Control Circuit The control circuit mainly located in the control section of TX RX unit X57 626 B 2 consists of the following 5 1 CPU 5 2 memory circuit 5 3 CPU clock shift 5 4 shift register circuit 5 5 display circuit 5 6 DSP circuit 5 7 base band cir cuit 5 8 RS 232C circuit and 5 9 power supply circuit 5 1 CPU The CPU IC604 is a 16bit single chip microcomputer containing a 32k ROM and 3k RAM This CPU controls the flash ROM the DSP the receiver circuit the transmitter cir cuit the control circuit and the display circuit and transfers data to or from an external device 5 2 Memory Circuit IC609 has a flash ROM with a capacity of 2M bits that contains the control program for the CPU the signal pro cessing program for DSP and data such as channels and op erating features This program can be easily written from an external de 5 5 Display Circuit The display circuit X54 333 contains two 7 segment LEDs D506 D507 orange see the operation manual for details of display D503 red transmission D504 green busy two color LED D505 red backup green main DC LEDs in switches S501 to 5506 502 503 IC504 and IC505 to display this model channels and states IC502 to IC505 are shift registers which convert serial data from th
26. OFF Transmission AG Front MIC AF VIVM Narrow 2 VCO A CH TX VCO A center PC adj 0 05kHz VCO B CH TX VCO B center 1 5kHz Transmission 28 TA TX 1 Insert AG output into the MOD Rear TX ANT PC adj 0 1kHz audio input control I O TA terminal pin 9 or 3 0kHz deviation VCO A CH TX VCO A center Deviation Wide VCO B CH TX VCO B center meter Deviation meter filter Oscilloscope HPF OFF LPF 15kHz AG CONTROL De emphasis OFF AF jack AG freq 1kHz Sine wave TA pin 9 AG level 280mV Transmission Narrow 2 VCO A CH TX VCO A center PC adj 0 05kHz VCO B CH TX VCO B center 1 5kHz Transmission 29 TD 1 Insert AG output into the MOD Rear TX ANT PC agj 0 1kHz deviation control I O TD terminal pin 8 0 75kHz Wide VCO A CH TX VCO A center Deviation VCO B CH TX VCO B center meter Deviation meter filter Oscilloscope HPF OFF LPF 3kHz AG CONTROL De emphasis OFF AF jack AG freq 100Hz Sine wave TD pin 8 AG level 0 5Vp p 177mVrms Transmission Narrow 2 VCO A CH TX VCO A center PC adj 0 05kHz VCO B CH TX VCO B center 0 35kHz Transmission 30 Repeat 1 VCO A CH TX VCO A center SSG Rear RX ANT PC adj 0 1kHz gain level VCO B CH TX VCO B center 1kHz Wide SSG output 53dBm MOD ANA TX ANT SSG MOD 1kHz or SSG DEV 1kHz Deviation Deviation meter filter meter HPF OFF Oscilloscope LPF 15kHz De emphasis O
27. 4215 TRANSISTOR R306 73GB1J R308 73GB1J Cy r R309 73GB TX PLL VCO X58 4790 10 R310 73GB R311 73GB 1000PF R312 736B 0 010UF R313 736B 1000PF 0 10UF R3 736819 0 1UF R3 73GB1J R3 73FB2A R317 92 1252 0 R3 73GB1J 220 6W 6 8 6W 6W 220 6W 2 2 6W CK73GB1H102K CH CK73GB1H103K CH CK73GB1H102K CH CK73FB1E104K CH C92 0001 05 CH 6W 6W OW NODO C73GC CH C73GC CH C73GC CH K73FB CH C73GC CH 2020000 6W R320 73GB R321 73GB R322 73GB C73GC CH F R350 353 92 1252 92 0514 CHIP 2UF R354 355 73GB K73GB CH F 92 0514 CHIP 2UF R356 357 73GB C73GC CH F R358 359 73GB R360 363 73GB CK73GB CH F R364 73GB CK73FB CH R365 73GB C92 0003 CHIP CC73GC CH CK73GB CH 6W 6W 6W NODO 3 C2 C2 C3 6W 6W 6W 6W 6W 6W PADRE TIT O R366 73GB R367 73GB R368 73GB R370 371 73GB R372 73GB 6W 6W 6W 6W 6W O C73GC CH C73GCH CH 20000 K73GB CH K73FB CH C73GC CH R373 RK73GB R374 RK73GB R375 RK73GB R A6W R J A6W R J A6W NODO C73GC CH K73GB CH C73GC CH C73G CH C73G 50G CH D350 353 18V282 VARIABLE CAPACITANCE DIO D354 355 1SV214 VARIABLE CAPACITANCE DIO C300 SA7025DK MOS IC Q300 301 2SC4116 GR TRANSISTOR Q302 25 4215 TRANSISTOR NODO CC73G 09
28. B center CH VCO B center B high CH TX VCO B high Deviation meter filter HPF OFF LPF 15kHz De emphasis OFF AG 1kHz 50mV Terminal load Transmission MOD ANA or Deviation meter Oscilloscope AG AF VTVM Rear Front TX OUT MIC PC adj Adjust to point of opening squelch Check Squelch must be closed PC adj Adjust to point of opening squelch PC adj Adjust to point of opening squelch PC adj 80mV 5mV PC adj 400mV 20mV PC adj 4 1kHz 0 1kHz 43 TKR 750 Condition ADJUSTMENT Measurement Adjustment Test equipment Unit Terminal Parts Method Specifications Remarks 2 A low CH TX VCO A low A center CH VCO A center A high CH TX VCO A high B low CH TX VCO B low B center CH VCO B center B high CH TX VCO B high Transmission MOD ANA Rear or Deviation meter Oscilloscope TX OUT AG AF VTVM 23 DOT balance Wide 1 Low CH VCO A center High CH VCO B center Deviation meter filte HPF OFF LPF 3kHz De emphasis OFF Transmission 2 Low CH VCO A center High CH VCO B center Transmission Narrow MOD ANA or Deviation meter Oscilloscope 24 OT deviation Wide 1 VCO A CH TX VCO A center VCO B CH TX VCO B center Deviation meter filter HPF OFF LPF 3kHz De emphasis OFF Detector p p 2 Transmission
29. C73GCH1H10 73GB1E103 92 0628 05 73GB1C104 K73FB1E334K 92 0628 05 73GB1C104 73FB1E3 C73GCH1 73GB1H C73GCH1 C73GCH1 73GB1C E40 6140 05 E40 6102 05 5 5 E40 6141 0 E08 0877 0 J31 0543 05 75GB1J471J 92 1252 05 K73GB1J683J 73GB1J103J 73GB1J682J 73GB1J102J 73GB1J103J 73GB1J224J m D RED GREEN P TAN P TAN PC HIP C c occ p C C Cc coc CS ASSY ASSY ASSY DULAR JACK LLAR LH 5 1 5 470 00 68 10 6 8 O PR 1 0 PR 10 PR 220 cS O R5 R513 R514 R516 R517 R519 R520 526 R529 540 R541 544 R601 R604 605 R606 VR501 VR601 501 506 507 D501 502 D506 507 D508 514 D601 602 D603 1501 502 505 1C506 507 0501 0502 0504 0506 0507 0508 0510 511 0512 514 0516 519 0521 524 0525 RK73GB1J RK73GB1J RK73GB1J R92 2565 0 R92 2023 0 R92 2565 05 R92 2023 05 RK73GB1J102J RK73GB1J103J RK73GB1J681J RK73GB1J102J RK73GB1J473J R32 0643 05 R31 0630 05 570 0410 568 0410 0 HSM88AS LA 501DD DA204U DA204U INISMDO20 JM4558E BU4094BCFV TA78LO5F 25 4116 2SA1586 Y GR PA672 DTA114E PA672 DTA114E DTA114E UPA672 UPA672 UPA672 25 1824 CH 10K CH 100K J CH
30. CN8 GND 72 0754 12 A 2 BLACK RED e ES 5 on 19 ay L12 C47 C77 J 72 0754 12 B 2 000 Annal C46 4 ORANGE K1 1 in O 37 95 C74 5 C29 Fad 5 5 GUA C141 L10 ae 3 N m 5 C30 2 ES G Q4 D lt 6 C31 C142 C69 E ES y C32 x I Ca c2 E 9 o C27 R43 ia R37 R62 n Q E VTH 5 9 CO L E gl 4 5 a El a o Olla D C97 R 4 a 696 R26 R49 Ima IC1 42 n FAB 1 5JES 9 g El 8T C106 el o in 3 SU HEEE E Al Jac lo 5 m 113 lt O E b 6 2 aim B C68 m CN5 LEL R64 CN3 R45 10 Address Ref No Address Ref No Component side Pattern 1 d Pattern 2 Pattern 3 Pattern 4 Foil side 12 13 59 60 14 A B FINAL UNIT X45 3620 XX 10 K E 11 K2 Foil side view f 72 0754 12 1 LLLELLLLLLL Lees m paccm EE EE 1 ae GND E J 72 0754 12 B 2 Component side Ref No Address Ref No Address Ref No Address I2 7 Q9 80 D8 60 IC3 90 01 D9 70 Q7 8E 7B Q8 9 06 90 61 62 Pattern 1 Pattern 2 11 Pattern 3 Pattern 4 Foil side 12 13 14 i u oo Compone
31. Function Start up Condition of LED in he PF key on AUX Out 1 5 I O 1 6 Off Yes AUX Out 1 5 I O 1 6 On Yes AUX Out 1 5 I O 1 6 On Off No Turns on in ON status Channel 1 16 Up Down Do not turn on CW ID On Turns on while transmitting CW Message 1 8 On Turns on while transmitting Display Off Display On Display On Off Turns on in ON status Hold Time Enable Hold Time Disable Hold Time Disable Enable Turns on in Disable status Loca Tx Disable Loca Tx Enable Loca Tx Disable Enable Turns on in Disable status Mon itor Off Mon itor On itor On Off Turns on in ON status itor Momentary Turns on in ON status i Table Sub i Table Main i Table ain Sub Turns on in Sub status Dec isable Dec Dec D Enable Disable Enable Turns on in Disable status Enc Disable Enc Enable Enc Disable Enable Turns on in Disable status Repeat Disab e Repeat Enable Repeat Disab e Enable Turns on in Disable status Reset Do not turn on DC Power Save Off DC Power Save On DC Power Save On Off Do not turn on Scan Off TKR 750 OPERATING FEATURES Trigger Save Function on off Start up Condition of
32. Measurement Adjustment TKR 750 Test equipment Unit Terminal Unit Parts Method Specifications Remarks Narrow 3 CH 2 Narrow SSG output 3dB below to 12dB SINAD level SSG MOD 1kHz SSG DEV 1 5kHz AF 2V 4Q 4 SSG OFF 19 Tight squelch Wide 1 Connect SSG to RX ANT CH 2 Wide SSG output 7dB over to 12dB SINAD level SSG MOD 1kHz SSG DEV 3kHz 2 40 Narrow 2 CH 2 Narrow SSG output 7dB over to 12dB SINAD level SSG MOD 1kHz SSG DEV 1 5kHz 2V 4Q SSG Audio analyzer VTVM Oscilloscope Rear TEST SPKR jack SPO RX ANT pin 12 20 RD outut level Wide 1 Connect SSG to RX ANT CH 2 Wide SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 1 5kHz Narrow 2 CH 2 Narrow SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 1 5kHz SSG DVM Rear RX ANT CONTROL jack RD pin 10 load 21 RA outut level Wide 1 Connect SSG to RX ANT CH 2 Wide SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 1 5kHz Narrow 2 CH 2 Narrow SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 1 5kHz SSG DVM Rear RX ANT CONTROL jack RA pin 11 load 22 Maximum deviation Wide 1 Connect AG to the MIC terminal A low CH TX VCO low A center CH VCO A center A high CH TX VCO A high B low CH TX VCO B low
33. RK73GB 4094BCFV RK73GB1J473J C74LVX4245FS OS IC RK73GB1J102J 0622M4 113GP PU RK73GB1J473J U4053BCF OS IC RK73GB1J102J TC74LVX4245FS OS IC RK73GB1J473J JM4558E OS IC RK73GB1J102J TA75S01F OS IC RK73GB1J473J 29 020 90 ROM IC RK73GB A75S01F OS IC RK73GB1J473J JM4558E OS IC RK73GB1J102J TC7S04FU OS IC RK73GB1J473J 3 C74VHC4040FT OS IC RK73GB1J102J 4 AK4550VT OS IC RK73GB1J473J 5 M62364FP OS IC RK73GB1J102J 6 JM4558E OS IC RK73GB1J473J 8 20VC5402PGE PU RK73GB1J102J 9 C75W51FU OS IC RK73GB1J473J C620 DM202EARN OS IC RK73GB1J A C621 C7S00FU OS IC RK73GB1J473J C622 C7S66FU OS IC RK73GB1J102J C623 U4094BCFV OS IC RK73FB2A2R2J C624 XC62FP1802P OS IC RK73GB1J473J C625 626 XC62FP3302P OS IC RK73GB1J102J C627 628 78105 OS IC RK73GB1J473J C629 LA4422 POLAR IC RK73GB C630 TA78LO5F OS IC RK73GB1J473J TKR 750 TX RX UNIT X57 6260 XX RX PLL VCO X58 4780 10 Desti nation PARTS LIST Desti nation RANSISTOR C359 RANSISTOR C360 361 DIGITAL TRANSISTOR C362 363 DIGITAL TRANSISTOR C364 365 DIGITAL TRANSISTOR C366 Address Parts No Description Ref No Address Parts No Description 2563357 25 3356 824 DTC144EUA DTA144EUA DTC144EUA CC73GCH1H080B PC 8 0PF CK73FB1C474K PC 0 47UF CC73GCH1H470J PC 47PF CK73GB1H102K PC
34. function is executed if the Squelch Off function is executed Scanning stops on the channel being scanned when Squelch Off is ex ecuted the channel number is displayed and the re ceived audio is heard from a speaker if a local microphone s hook is in off hook status provid ing that the Off Hook Scan function is set to Disable Scanning stops on the Revert channel but the audio is not heard until a valid signal is received o When the received call is ended scanning automatically resumes after the period set in Dropout Delay Time function has expired When the Scan Off function is executed the TKR 750 inhibits scanning and displays the selected chan nel 8 2 Scan Sequence 1 Normal Scan When no Priority channel is set scanning of ADD channels is done in ascending order 2 Single Priority Scan The Priority channel is set as either a fixed channel or a selected channel When Priority channel is set Priority channel and non Priority channel are scanned by turns When scanning stops on the non Priority channel calls from the Priority channel are still checked at set intervals while scanning is stopped This operation is called Look Back and the interval period is selected by the Look Back Time function 8 3 Revert Channel The Revert channel is a channel that is used to transmit during scanning The time from the end of transmission on Revert channel to the time scanning automatically resumes is set in Dwel
35. the transmission is inhibited 12 Repeat Hold Time The Repeat Hold Time hang timer function is used to prevent the repeater from being repeatedly keyed and unkeyed in response to short message traffic When a mo bile transceiver unkeys the repeater s Hold Timer allows the repeater to continue transmitting for a brief period while waiting for a responding end user If no valid OT DOT is detected within the Hold Timer period the transmitter is al lowed to unkey This function determines the period of time that the transmitter is allowed to remain keyed after the loss of a valid OT DOT received signal 13 Take Over The Take Over function is used to disable the external wireline control of the repeater When Take over function is enabled the external AUX inputs and Outputs transmit au dio inputs and receive audio outputs External PTT and Ex ternal Monitor lines are disabled All AUX Input functions assigned to any AUX Input stay in their current state How ever External PTT and External Monitor switch to the Off state 14 Test Tone The Test Tone is a single frequency audio sine wave and is turned On and Off by toggling Test Tone On Off functions The transmitter can be modulated without a local micro phone by using the test tone When Test Tone On function is executed and any PTT is activated the TKR 750 transmits the test tone with mic mute and also routes the test tone to RA port 15 RF Power The TKR 750 is abl
36. 0 EY TOP B10 2635 04 GLASS F KEY 3A 29 9106 0 OB DC SOURCE B10 2636 04 GLASS PC SHEET B11 1259 04 F KEY 2C 09 2292 05 HEXAGON HEAD SCREW B62 1327 10 UCTION MANUAL 2C 15 1030 46 FLAT WASHER B72 1797 04 L NAME PLATE 30 2606 46 PAN HEAD MAGHINE SCREW 6 6 30 4006 4 PAN HEAD MAGHINE SCREW B72 1900 14 DEL NAME PLATE 30 4014 4 PAN HEAD MACHINE SCREW B72 1932 04 DEL NAME PLATE 30 4020 45 PAN HEAD MACHINE SCREW E30 3414 0 DC CORD 32 3006 46 FLAT HEAD MACHINE SCREW E30 3418 0 ANTENNA CABLE B 32 4008 45 FLAT HEAD MACHINE SCREW 5 5 E30 3419 0 ANTENNA CABLE N 33 3006 4 OVAL HEAD MACHINE SCREW E30 3427 DC CORD ACC 35 3006 4 BINDING HEAD MACHINE SCREW E31 3228 0 LEAD WIRE WITH CO 35 3014 4 NDING HEAD MACHINE SCREW E37 0808 0 LEAD WIRE WITH CO 35 4006 4 NDING HEAD HINE SCREW E37 0902 0 LEAD WIRE WITH TE 67 3008 4 AN HEAD SEMS SCREW W E37 0903 0 LEAD WIRE WITH TE 87 2606 4 RAZIER HEAD E SCREW E37 0904 0 LEAD WIRE WITH 87 3005 4 RAZIER HEAD E SCREW E37 0905 05 LEAD WIRE WITH CO 87 3006 46 RAZIER HEAD E SCREW E37 0906 05 LEAD WIRE WITH 7 0908 05 LEAD WIRE W T07 0247 05 PEAKER E37 0909 05 LEAD WIRE W E37 0911 05 LEAD WIRE W E37 0912 05 LEAD WIRE W FINAL UNIT X45 3620 XX 10 K E 11 E37 0913 0 LEAD WIRE W E37 0934 0 LEAD WIRE WI CK73GB1H102 CHIP C F E37 0964 0 LEAD W
37. 150K J RE CH 820 RE CH 820 CH OK CH OK CH 680 CH OK J CH 4K J SEMI FIXED VARIABLE RES VARIABLE RESISTOR TACT SWITCH PUSH SWITCH DIODE LED DIODE DIODE VARISTOR OS IC OS IC OS IC TRANSISTOR TRANSISTOR FE DIGITAL TRANSISTOR FE DIGITAL TRANSISTOR DIGITAL TRANSISTOR 16W 16W 16W 2W 2W 16W 16W 16W 16W 16W STOR IT X57 6260 XX AAR ORG AG OG CC73G CC73G CC73G CC73G CC73G 0600 390 0200 ORSC 0600 00000 CC73G CC73G CK73G CK73G CC73G 080D 390 03K 02K 101J Coca CC73G CC73G CC73G CC73G CC73G 0600 0800 390 0200 ORSC 00000 CC73G CC73G CC73G CC73G CC73G 0500 0200 0100 0600 0900 00000 CHIP CHIP C CHIP CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C TKR 750 PARTS LIST TX RX UNIT X57 6260 XX Desti nation 18PF 22PF K2 100PF 10PF 18PF Desti N Address Description nation Description PC 27PF PC 3 0PF PC 27 PC PC 1000PF NODO 1 0UF 10U 68PF 330 0 0 PC 0 010U CTRO 100 220 PC 0 0 PC 100 3 C3 c 0 0 0 010UF ECTROLYTIC CAP P
38. CC73GCH1H180G PC 8PF lt 2SC4617 S C367 25 3120 C368 25 3357 C369 2SA1586 Y GR C370 2503 C371 CC73GC 50G PC CC73GC 80G PC CC73GCH1H150G PC CC73G 80G PC CC73G 50G PC 2SC4116 GR 258 QR 0374 375 DTC114EUA C376 378 258 C379 DT UA TAL C383 C372 373 CK73GB1H102K PC CC736CH1H010B PC OPF CK73GB1H102K PC CC73GCH1H100C PC OPF CK73GB1H102K PC gt 350 351 C05 0396 05 RAMIC TRIMMER CAP 8P CN300 CN350 CN351 E40 5699 05 E40 5755 05 E40 6098 05 ASSY ASSY ASSY F10 2377 04 ELDING CASE L300 L92 0148 05 ITE CHIP L301 302 L40 3975 34 LL FIXED INDUCTOR 39NH L303 L40 1085 34 LL FIXED INDUCTOR 100NH L350 355 L33 1268 15 LL FIXED INDUCTOR L356 357 L34 4612 05 AIR CORE COIL D UA 2SJ506 S DTC114EUA L358 361 157 503 53006 L362 L33 1268 15 5 L40 8271 34 5 XED INDUCTOR XED INDUCTOR 82NH W02 1939 05 R300 73GB1J CH 10 6W R301 304 73GB1J CH 100 6W R305 252 CH 00H R306 GB1J CH 22 6W RX PLL VCO X58 4780 10 R308 En x EM 73GB1H102K 73GB1H103K 73GB1H102K 73FB1E104K 92 0001 05 1000PF R30 GB CH 6W 0 010UF R3 GB CH 6W 1000PF R3 GB CH 6W 0 10UF R3 GB CH 6W 0 1UF R3 GB CH 6W
39. COIL K 1000PF K L40 3375 34 J J R CORE COIL ALL FIXED INDUCTOR 33NH ALL FIXED INDUCTOR 470NH ALL FIXED INDUCTOR 820NH 120PF L40 4785 34 18PF L40 8285 34 NODO gt gt C93 0565 05 C93 0601 05 CK73GB1H103K C90 2143 05 CK73GB1H 27PF L40 8275 92 680PF 0 0 RK73FB2A100J 47U RK73GB1J220J 100 RK73GB1J472J R R co LL FIXED INDUCTOR 82NH ow 6W 6W OW OW O gt c FB2A100J FB2A470J OQ 0 20 CK73FB1H1 CK73GB1H CK73GB1H C93 0564 0 C93 0564 0 100 100 100 FB2A101J 22PF GB1J472J 22PF GB1J471J 1217 05 27PF FB2A183J 39PF 27PF 73EB2B180J 73EB2B330J 000 FB2A473J 1252 05 C92 0777 ROLYTIC CAP 1215 05 C93 0601 680PF CC73GCH OPF FB2A473J CC73FCH F FB2A563J CC73FCH GB1J473J GB1J101J CK73G GB1J471J C90 2143 ow 6W 6W NODO 93 0565 0 C93 0567 0 C93 0565 0 CK73GB1H CK73GB1H 10W 8W 8W 10W NODO OA ODD ooooeoo GB GB GB GB GB C9 0 GB 1252 0670 GB1J FB2A101J F FB2A121J F2H F 1252 05 CC73FCH D FB2A101J GB1J102J C93 0601 05 F GB1J471J CC73FCH1H020C CM73F2H390J 1217 05 CM73F2H680J ooooeo GB1J102J E04 0154 05 GB1J102J E40 5632 05 1317 05 E40 3246 05 E40 5703 05 E23 0462 05
40. D2 02DZ5 1 Y D8 RBOS1L 40 Q3 2503357 25 4116 102 TK11050M x x 03 6 155355 09 5 50 02 Q4 2SK3075 Q9 DTD123EK IC3 NJM78LOSUA t TT s D601 602 DA204U D501 502 HSM88AS Q501 2SC4116 Y Q506 508 DTA114EUA 10501 NJM4558E BLE lt HSMaeas Ge 0603 MINISMDO20 D503 505 B30 2151 05 Q502 2SA1586 Y GR 510 511 1 502 505 BU4094BCFV D506 507 LA 501DD 0504 507 512 514 UPA672T Q525 25 1824 506 507 TA78LOSF 0508 614 DA204U 516 519 521 524 88 TKR 750 TKR 750 BLOCK DIAGRAM TKR 750 TX RX unit X57 626 A 2 1 i 44 850MHz wy 01 1C624 02 2503357 INT SP XC62FP1802P DANZ35K DANZ35K A1 L5 6 7 RE AME
41. FREQUENCY AN me alt n DENE n mm m m m C368 18 77 DTC114EUA DTC114EUA E40 5632 05 I CONTROL 92 ANEI Mens Maas mA Sm ot 10 FREQUENCY IN FEN nig oT T UMS 6 1 I op 3 DC_SWITCH TX CV 2 of 1 3109 C374 8929 RX CV CONTROL IG Ga Tice 374 R359 I AT oc m 1 s Site Sig a 27 3 8555 59 Son 2 2 7 VCO OSC Sita 1p x o 2 8 SEY 7 eres al Sox Ses 11 mieT 29 LE TS D352 C356 C366 C368 DC SWITCH MSS MASA mm 0350 DC SWITCH 005 R160 e FINAL UNIT T 1 1 Beg 9352 E E e 11 R353 1353 0352 C356 L356 2SKSO8NV 52 ob ONS 4 Sus NT rey e e wen A 2 CN3 a CN350 0 109 450282 27 27 0350 15 ES 2564116 0 10u Dil I Son men 0352 270 014 15 282 33p Dg od el y 25 4116 RIPPLE FILTER 4 96 R 7 91V 2 GND 1 1 GND FREQUENCY VCO OSC 2 La R362 9 2 s 2 R362 I NON7SLOSUA CONTROL E me a m P ila TES 8 775112 2 STT Z n MS SSX obx 4 7 2SC4116 GR 577 me e 224 SRR 255 3 EE Dc switcH DC SWITCH 777 RI CLE 7 e0354 BCLR 90354 EV 4 4 ty T Wee 10k o P DTC114EUA in eR364 ya lt DTC114EUA I 0355 RSX nS m 10k X9 m NSn eco ao eCN14 5 5 R3so L350 MODULATION RON 647 29 rey kaso 350 glo
42. LED in he PF key on Scan On Yes Yes Scan On Off No No Turns on in ON status Scrambler Off Yes Scrambler On Yes Scrambler On Off No Turns on in ON status Squelch Off Yes Squelch On Yes Squelch On Off No Turns on in OFF status Squelch Momentary No Turns on in OFF status Take Over On Off No Turns on in ON status Test Tone Off Test Tone On Test Tone On Off Turns on in ON status TOT Disable TOT Enable TOT Disable Enable Turns on in Disable status TX Disable TX Enable TX Disable Enable Turns on in Disable status None 5 Simplex Duplex Operation The Simplex Duplex function is used to specify whether the channel is used as simplex receiver muted during trans mit or duplex receiver unmuted during transmit If the channel has same TX RX frequency it can operate only in Simplex mode 6 Repeater Base Station Operation The Repeat function is used to specify whether the chan nel is used as a repeater or as a base station A repeater simultaneously and automatically re transmits its received audio a duplex base station has independent simultaneous transmit and receive paths a simplex base station are mutu ally exclusive transmit and receive paths 7 Signalling Feature 7 1 Multiple OT DOT The TKR 750 can function as a multiple OT DOT decode encode unit for operation as
43. RK73GB1J681J 680 RK73GB1J100J 10 RK73GB1J680J 68 TKR 750 PARTS LIST TX RX UNIT X57 6260 XX Desti nation Desti nation OHM R638 R639 HM R640 R641 R642 Address Parts No Description Ref No Address Description R92 1252 05 RK73GB1J102J R92 1252 05 RK73GB1J RK73GB1J182J 73GB1J101J 73GB R R643 R RK73GB R R R644 R645 646 R647 652 R653 654 73GB 73GB RK73GB1J RK73GB1J RK73GB1J R92 0670 R92 1252 R655 R656 R657 661 R662 R663 667 O OO OO 736B K73GB 73GB 73GB 73GB R668 R669 671 R672 674 R675 R676 K73GB 73GB 73GB K73GB 73GB R678 R679 680 R68 R682 R683 73681 73681 92 1252 73681 73681 R684 R685 686 R687 R688 690 R691 693 73GB 73GB 73GB 73GB K73GB R694 695 R696 R697 R698 R699 I 73GB K73GB 73681 73681 73681 R700 R701 R702 R703 R704 706 92 0670 736 1 736 1 K73GB 73GB R707 709 R710 R712 R713 R714 73681 R92 1252 R6 RK73GB1J R6 R92 1252 R6 RK73GB1J 715 R717 718 R719 R720 R721 C3 CC C3 CS I R6 R92 1252 R6 GB1J R620 622 GB1J R623 624 252 R625 628 GB1J R722 R723
44. RX Unit X57 6260 XX Part name Description FET DC swi Part name Description Buffer amplifier DC swi Voltage regulator DC swi D A converter Inverte C7 Shift register DC swi C9 FM IF system Inverter C10 11 Voltage regulator AF mute switch C600 EEPROM C601 Voltage detector DC switch FET DC switch Transi DC switch C602 Shift register C603 Bus transceiver Diode Wide Narrow switch C604 CPU C605 Multiplexer D5 Diode Noise detection D7 Diode DC switch D8 Diode TX switch C606 Bus transceiver C607 608 AF amplifier C609 Flash ROM C610 611 AF amplifier D11 Zener diode Surge protector D12 Zener diode Voltage reference D600 iode Surge protector C612 Inverter D D601 Diode Voltage reduction D D606 625 iode Surge protector C613 Counter C614 CODEC D626 Varistor Current protector C615 D A converter C616 617 AF amplifier D627 628 i Reverse current protector i Surge protector C618 DSP C619 AF amplifier RX PLL VCO Unit X58 4780 10 C620 RS 232C transceiver C621 NAND gate C622 Multiplexer Ref No Part name Description 00 PLL Q300 302 Transistor Buffer amplifier Q350 351 FET VCO OSC 0352 354 Transistor DC switch C623 Shift register C624 628 Voltage regulator C629 Audio amplifier Q355 Transistor
45. RX unit B 2 control section and the output from pin 13 FAS of IC7 in the TX RX unit A Fig 4 Fan action control circuit 2 controlled by the CPU goes H This signal turns Q9 in the final unit ON to run the cooling fan It has a hysteresis of approx 5 C by IC2 If fan action is set to Continuous the fan operates continuously but O9 stays ON 19 TKR 750 20 CIRCUIT DESCRIPTION 4 PLL Frequency Synthesizer The PLL frequency synthesizer circuit consists of the fol lowing circuits 4 1 receiver PLL circuit 4 2 transmitter PLL circuit and 4 3 unlocked detector circuit 4 1 Receiver PLL The receiver PLL circuit is located in VCO unit A3 X58 478 on TX RX unit X57 626 A 2 and consists of VCXO X2 VCO s 0350 and 0351 a single chip PLL IC IC300 buffer amplifier 0355 and high frequency amplifier 0302 The VCXO generates 16 8MHz The frequency stability is within 2 0ppm Temperature range of 30 to 60 C The frequency tuning of the VCXO is done to apply a voltage to pin 1 of the VCXO The output of the VCXO is applied to pin 8 of the PLL IC through the pin 7 of the VCO The first local oscillator is an Upper heterodyne local oscil lator and the VCO oscillator frequency is 180 850 to 218 850MHz Two VCOs cover the two bands Q350 cov ers the lower band 0351 VCO covers the upper band The oscillator frequency is controlled by applying the VCO control voltage obtained from the phase comparator t
46. SB switching relay circuit TKR 750 SEMICONDUCTOR DATA Main CPU 30622M4 113GP TX RX unit IC604 Pin Function Function Function Aux I O No 5 No 1 Acc D sub 25 pin Not used 5V Not used GND TX PLL IC enable Flash ROM WR DSP HDS1 Not used RX PLL IC enable Flash ROM WR DSP HDS2 Microcomputer reset input Control shift register STB 14 7456MHz DSP interrupt H Off L On GND DSP HCS 14 7456MHz ash ROM CS 5V Not used ash ROM address bus Backup battery detect H Backup L Main Not used F 5 V ash ROM address bus Temperature detect for fan action H Temp high L Temp low Acc PTT Acc D sub 25 pin H Off L On E GND Flash ROM address bus Acc monitor Acc D sub 25 pin H Off L On Common clock Common data RX VCO lock de H Lock L Beat shift H On L Off Control D A converter LD TX VCO lock de H Lock Un Control shift register STB EY5 KEY4 Key matrix outp TX RX D A converter LD EY3 KEY1 Key matrix inpu shift register STB 07 00 Flash ROM data bus DSP reset H Off L On FWD RF power down level input Oo o 0 O0 J0JOJO O O Squelch control Acc D sub 25 pin Inactive L Active Mic PTT H Off L On RSSI RSSI level input ASQ Squelch level input Volume level input
47. SHIFT u UPAGT2T IE DTA114EUA AEN 4 UTS Be swta X54 3330 20 B 2 I RESISTER UPAS72T DC SWITCH PEEL 1 3 1 R58 100k 51 MAIN DC A A A sE A B IN S OUT dd R55 MAIN DC ws 81 7 e un in 9 e B1 ce lt INA L I O 5 FAG gt THERMOSTAT 1k le 7 N m I1 1 un ol o TH REVERSE A lt ESE 5 x 059 nso 059 nso le 7 mr T 13 12v OFS ek 1 may CURRENT W4 GND I 1 4 R 13 60V PROTECTION a GND d i emee e a 6 5 RAR 0508 0509 0510 D511 0508 514 U U 2 DA204U DA204U DA204UDA204U SURGE ABSORPTION ES MINISMDCO50 02 251 52 CURRENT eVR601 1 VL I 11 4 5 N PROTECT OF REVERSE PROTECTOR 10k x Som NAT Lol CURRENT 2 SM 40 t 9 cor 52 om PROTECTOR 3 GND 9 239 eo R59 39k BACK UP C INT Sm3020 SB oxi 77 O CHARGE echas BATTERY 5 7 o SURGE ro BACKUP JeCN7 ws B2 EN Q501 9 I y 6 gt lt 6 2SC4116 Y AF DETECTOR ri PROTECTOR e 19 B2 7 GND 5 R508 N pe C504 C508 f R604 Ik 8 PTT R502 1k mI T ag 7 DTD123EK GND 9 MIG 3 9 LEVEL 222 9 18 2 5 Alx DC SWITCH Y SND 6 I 10 MIC 2 CONTROLLER U D
48. SWP 2 0sec Final Unit X45 3620 XX Connector Terminal No No Name Terminal TERMINAL FUNCTION Terminal function Terminal No Terminal Name TKR 750 Terminal function CN1 DRV TX driver input signal Coaxial CN2 Reserved output Reserved Ground High temperature detector signal Main DC BACKUP status output RF power down signal output Fan control signal input TX power control signal input 8V input during transmission Terminal No STB1 CLK DAT PSW GND NC SB SB Terminal Name Strobe data for shift register Clock data input Serial data input Power switch output Ground No connection Power supply input after power switch Power supply input after power switch Terminal function Power supp Fan ground output for cooling fan E Ground B Power supp B Power supp y output y output Main DC Power supp terminal y input from Main DC BACKUP Power supp terminal y input from BACKUP GND Ground it X54 Terminal Connector No Name 30 20 A 2 Terminal function N gt VLI 5M GND C Volume control output for AF signal Common 5V input Ground connection Power supply input after power switch connection Ground PTT output TXD input IC ground IC signal output Hook detection output RXD output CN501 HO
49. TEST register 1C623 Remove Remove SPKR R755 R756 R769 R770 00 00 Fig 2 15 TKR 750 MODIFICATION DISASSEMBLY FOR REPAIR 3 Trickle Charge for Backup Battery If the external DC power supply is connected to the Main DC connector and a backup battery 12V rechargeable type is connected to the Backup connector at the same time the battery can be trickle charged from the external DC power supply with a maximum current of 0 5A Short the CHARGE land near R61 Notes 1 Make this modification after removing the DC power sup ply and battery for safety 2 When the DC power supply is connected after the modi ication DC voltage is output to the Backup connector Be careful during setup 3 When the backup battery is used for a long time remove 16 he battery from the repeater and recharge it because the rickle charge is not sufficient for recharging a completely discharged battery Final unit A 2 0 Component side CN7 BACKUP CHARGE 61 JN Fig 4 DISASSEMBLY FOR REPAIR How to Remove the Panel Assy ABS Note You can remove the panel assembly ABS without removing the top panel A62 0840 03 1 2 3 To remove panel TX RX loose 6 screws 0 To remove panel assembly Front loose 6 screws The panel assembly ABS is security fastened by 4 tabs 5 on top and bottom You can remove the panel as sem
50. TKR 750 TX RX UNIT X57 6260 XX A 2 e c vs a gt ys gt s es
51. a community repeater or mul tiple OT DOT base station Two Multi Tables called Main and Sub can be created each consisting of 16 decode en code combinations Do not turn on The Multi Table function enables the TKR 750 to decode any one of the 16 OT DOTs pre programmed into the Multi Table When receiving a signal repeater operation the re peater uses the encode which corresponds to the decoded as set in the Multi Table In the Multi Table signalling pair of No 1 first column is defined as Primary A receiving signalling if it is contained within No 1 to No 16 is defined Current From No 2 to No 16 signalling pairs that can be changed between Main Table and Sub Table using AUX Ports 1 4 are assigned as Multi Table Select and the Multi Table Main the Multi Table Sub or the Multi Table Main Sub function is executed When AUX I O Ports 1 4 are set for Multi Table Select these are 4 bit Binary Coded Decimal BCD inputs AUX 1 is a least significant bit LSB and 1101 input LSB on the right side signifies the Table No 2 and 1100 input signifies the Table No 3 7 2 Encode Tone in Multiple When Local Microphone PTT or External PTT is active while the repeater is in use or the duplex base station is re ceiving the encode signalling is determined according to Encode Tone in Multiple function The simplex base station always tran
52. becomes active However when the Save Delay Timer A period expires all panel LEDs except the Power LED are turned off and the audio amplifier becomes inactive again and when the Save Delay Timer B period expires the DSP becomes inactive When the DC Power Save Mode is turned on or off up to 3 functions pre programmed into the Save On function or Save Off function are executed in sequence 20 Power Supply The TKR 750 is able to use two Power sources that are called Main and Backup When the Power source changes from Main to Backup or from Backup to Main up to 3 func tions pre programmed into the Backup Power function or the Main Power function are executed in sequence 21 Start Up When the TKR 750 is first turned on or is reset up to 3 functions pre programmed into the Start Up function are executed in sequence 22 Optional Board An optional scrambler board can be installed in the TKR 750 Scrambler codes between 1 and 16 are available per channel If the scrambler board is not to be used although it is installed set the parameter to Off When any Scram bler code is set up and the Scrambler On function is ex ecuted the scrambler board is activated REALIGNMENT 1 Modes PC programming mode PC tuning mode Firmware Programming mode Mode Function User mode Use this mode for normal operation PC mode Use this mode to make various settings by means of the FPU through the RS 232C port PC pr
53. then enters IC9 FM system IC The signal is heterodyned again with a second local oscillator signal 44 395MHz with in ICQ to become a 455kHz second IF signal The second IF signal is fed through a 455kHz ceramic filter CF1 Wide CF2 Nar row to further eliminate unwanted signal and the quadra ture detection circuit FM detects the signal to produce a base band signal and output it from pin 11 TX RX unit X57 A 2 TX RX 7 ERT ere C DR DE 1 MCF Wide 44 85MHz IF AMP IF AMP 1st MIX BPF RF AMP BPF 03 D2 N D1 02 DBMA1 151617 01 L2 L3 553 6959 gt W N N W N RX VCO 44 850MHz F SYSTEM IC vco A assi s B Om e fe YN CENE frx 44 85MHz I PAL NOISE DET 4 395MHz SD NOISE AMP 455kHz IC614 AMP RD IC604 ASO RSSI Fig 1 LPF IC619 B 2 1 619 2 LIIIIIIIII INT SP Receiver circuit 17 TKR 750 18 CIRCUIT DESCRIPTION 2 4 Audio Amplifier The audio amplifier circuit is located in control section of TX RX unit X57 626 B 2 The recovered audio signal ob tained from IC9 is amplified by IC608 input to the AINR ter minal of CODEC IC IC614 and audio processed by DSP IC618 The processed audio signal from AOUTR terminal of IC614 is ampli
54. transmitter input LRCK 16 128kHz used No connection Not used No connection used No connection VDD for I O pins 3 3V used No connection GND used No connection HPI data bus used No connection Serial data transmit output CODEC control Power down L Active ot used No connection ot used No connection Not used No connection yte identification HPI Not used No connection ot used Pull up Hold Pull up Command interrupt from host CPU MP MC Serial data syncronize input Not used Pull down ot used Pull up oot mode select Pull up DVDD VDD for pins 3 3V ot used Pull up Vss GND VDD for core CPU 1 8V NC5 NC8 Not used No connection HPI data bus HCNTLO HPI control 0 GND Vss GND NC9 NC12 Not used No connection BCLKRO Receive clock input SCLK 516 09375kH2 DVDD VDD for I O pins 3 3V Vss GND BCLKR1 Not used No connection CLKMD1 Clock mode select Pull down BFSRO Frame sync for receiver input LRCK 16 128kHz CLKMD2 Clock mode select Pull up CLKMD3 Clock mode select Pull down TKR 750 SEMICONDUCTOR DATA DESCRIPTION OF COMPONENTS Name Function NC13 Not used No conne
55. x 127 x65 mm projection not included 5 x 5 x 2 9 16 inch xu un eit dtd t NR ede ale 780g 1 72 lbs 92 TKR 750 SPECIFICATIONS K K2 TYPE GENERAL Frequency Range K 146 to 174MHz K2 136 to 150MHz Number of Channels 16 channel Channel 5 Wide 30kHz 25kHz Narrow 15kHz 12 5kHz PLL channel stepping 2 5kHz 5kHz 6 25kH2 7 5kH2 Operating Voltage 13 6V DC 15 Current Drain A tekstene 0 8A Standby w power save 0 3A Operationg mode DC IN Backup FAN Temp SAVE ON DISP OFF RECENO 1 2A Transmit Receive Less than 13A Duty Cycle RECEIVE sen 10096 seeded 100 100 Q25W Frequency Stability Less than 0 0002 30 C to 60 22 F to 140 F Antenna Impedance 50Q Operating Temperature Range 30 to 60 C 229 to 140 F DIMENSIONS cse eo eeu 483 19 W x 88 3 1 2 H x 340 13 1 3 D mm inch Welght zer lic 9 7kg 21 4 lbs RECEIVER Measured by TIA EIA 603 Sensitivity 120B SINAD sir e 0 35uV 2088 Quieting 0 45uV SEleTtV sa Wide 85dB 30kHz Narrow 80dB 15kHz 77dB 12 5kHz Interrmodulation z Le nd Wide 80dB 30kHz 60kHz Narrow 75dB 15kHz 30kHz Hum and Noise
56. 00 25W Frequency Stability Less than 0 0002 30 C to 60 C Antenna Impedance 500 Operating Temperature 30 to 60 C DIMENSIONS oe cene ee 483 W x 88 H x 340 D mm mese m bres 9 7kg RECEIVER Measured by ETS 300 086 s ion deed t nie eris 0 45uV Adjucent Channel Selectivity 85 25kHz 77dB 12 5 Intermodulation 2 0 7288 Spurious amp Image 90dB Audio Output Ext AW at 4Q less than 5 distortion Audio Distortion Ext Speaker Less than 2 5 at 1000Hz Band Spread vivacidad dne e k 3MHz TRANSMITTER Measured by ETS 300 086 seem et 50W adjustable to 25W 100 duty 25W Modulation 5kHz at 25kHz 2 5kHz at 12 5kHz Spurious 36dBm lt 1GHz 30dBm gt 1GHz FM Noise 25kHz 50dB 12 5kHz 45dB Modulation Distortion Less than 3 at 1000Hz Microphone Impedance 6000 Band Spread 28MHz KENWOOD CORPORATION 14 6 Dogenzaka 1 chome Shibuya ku Tokyo 150 8501 Japan KENWOOD SERVICE CO
57. 08 CH CC73G 50G CH CC73G 0908 C C 0350 351 25K508NV K52 FET 0352 353 2SC4116 Y TRANSISTOR 0354 DTC114EUA DIGITAL TRANSISTOR 0355 25 4215 TRANSISTOR K73GB1H102K C73GCH1H010B NODO CK73GB1H102K CC73GCH1H100C CC73GCH1HR75B CK73GB1H102K C05 0396 05 0 0 50 K IC TRI R CAP 8P gt E40 5699 05 ASSY E40 5755 05 ASSY E40 6098 05 ASSY F10 2377 04 SHIELDING CASE L92 0148 05 FERRITE CHIP L40 3975 34 SMALL FIXED INDUCTOR 39NH L40 1085 34 SMALL FIXED INDUCTOR 100NH L33 1268 15 SMALL FIXED INDUCTOR 134 4612 05 AIR CORE COIL TKR 750 EXPLODED VIEW TKR 750 12 704 05 46 46 46 46 45 46 45 45 46 46 45 46 45 45 N09 N15 N30 N30 N30 N30 N32 N32 N33 N35 N67 N35 N87 M4 x 20 BLK P M3 x5 Br Tap BLK N87 O M3x6 Br Tap BLK N87 J M3 x6 OC BLK L M3 x 14 Bi N M3x8 M2 6 x 6 Br Tap FW M2 6x6 D M4x6 E M4x 14 M3x6 F H M4x8 F BLK M M4 x6 BLK F A 38 Parts with the exploded numbers larger than 700 are not supplied TKR 750 PACKING E F 53 Protection bag H25 0029 04 59 Foot J02 0475 05 x 2 60 Foot J02 0492 04 x 2 62 Grommet J59 0302 05 x 2 D Binding head machine screw N30 4006 46 x 2 K Binding head machine s
58. 5 2 2 Ei 4700p ex EE P NE u Z Z o EPTT Lo D12 lt lt m z 102 m EMON R630 47k L gt y m m 5 R631 27k D11 Se H 5 ALT 9 MAZS 141 E 12 R709 DC SWITCH INTX A13 0602 x 101 N VOLTAGE m 25 1824 REDUCTION se 102 103 55 R715 C723 tee NG C822 1C603 606 Mol 545 Es BUS TRANCE VER SHIFT RESISTER 0608 0610 0612 0616 0620 623 iL z 5515 DA204U DA204U 2040 DA204U DA204U pA204U 10602 poss cam 5 lt E x BU4094BCEV Ns 79959 d x NCIS 1C606 E gt A19 C755 470p stra vool 9 TC74LVX4245FS TC74LVX4245FS S Q 3 3 3 2 X F OQ OQ O Og O4 gt 1 gt 2 1 vcce2L 2A C679 10u10 R684 47k CLK a5 C756 10u10 C680 10010 R685 100k hi DIR VCCB1 VCCB1 E MULT IELEXER D A CONVERTER R764 1k G G 02 07 95895 9 98676 82k TE 28765 pa 9 BU4053BCF 45 D617 o3 08 2 B2 HRW 16 VINS DA204U ecos yi VDD 04 a s 4 4 HENTL 1 8 VOUTS VOUTA SURGE vss 05 5 4 5 4 HCNTLO xl 5 126 gt Z E R gt zztls voute VOUT3 PROTECTOR 3 he ho 5 57 X2 zo x FE gt 3 elos a m e ow 16 515M VING VIN3 5c E
59. 50 contains internal automatic station identifi ers The CW ID Morse code is set and transmitted on a per channel basis The CW ID is transmitted when the in terval period is reached TX Interval Time function the channel is changed CW ID on Channel Change function or CW ID Onfunction is executed When CW ID is activated by any functions described above it is actually sent after the total time of TX Delay Time not applied to CW ID On func tion and CW Modulation Delay Time has expired TX Delay Time is a period from CW ID is activated to the transmitter is keyed CW Modulation Delay is a period from the transmitter is keyed to the CW ID tone is sent The CW ID tone is routed to the Receive Audio RA port and a speaker if the Send CW ID to RA function is set to Yes The TKR 750 contains 8 message banks for CW Message CW Message 1 to 8 is transmitted on the current channel when the CW Message 1 to 8 On function is activated respectively 10 PTT Priority A number of keying sources can be used to cause the TKR 750 to transmit The transmit audio path is switched according to their keying sources and when PTTs is simultaneously activated the transmit audio path related to the PTT with higher prior ity is given priority These are Local Microphone PTT Exter nal PTT and Repeat PTT 11 Time Out Timer The Time Out Timer function determines the period of time users can continuously transmit When the selected period expires
60. 501 Om SO o2 vg I HSM88AS g NS 1 8 NSS 4 R605 1k 11 H 1 2502 LU ez 5 Y AE EEE EEE IE v ol R503 10u10 2SA1586 Y GR AF DETECTOR mlx FE BEEBE CN501 0 R507 3 5 59 X45 3620 XX mal ona x mum 8 O Ome DA ts C505 CIT 11 17 21 c47 ca8 ca9 csolcsi cz1 c72lc112lc113 c116 c138 c139 c142 c151 c152 115 L16 L17 R18 R40 R64 R65 R66 HAND MOUNT FARS BSAA s ET SeT SeT ES ou Ef rex IN OUT OT x I R506 LEVEL PR neo 529 10501 10 K E C 47p 33p 33p 120 18 18 NO 22p 22p 180p 180p 180p 180p 470n 82n 82n 33 120 NO m n S ree eJ60 D602 CONTROLLER u 0502 DE NJM4558E o S lt x J 1 777 0601 06 is E08 0877 05 DA204U DA204U D I ASA 11 K2 C2 68p 27p NO 27 27 27 27 270 120 240 220 240 2 68 820n 18 100 5 6 820 820 E x s zl or nes Sn p 27p 27p 27p p p p p 2p p p n 0601 602 N e e e m in SURGE ABSORPTION 1 01 155226 07 25 5 27 02 25 3356 824 07 2SK1824 75 01 U gt ee
61. 724 R726 R727 R728 729 R629 1252 05 R630 631 GB1J473J R633 634 GB1J473J R635 636 GB1J102J R637 1252 05 R730 R731 R732 R733 R734 gt TKR 750 PARTS LIST TX RX UNIT X57 6260 XX Desti nation RK73GB1J333J 33K J R808 RK73GB1J102J PR 1 0K RK73GB1J473J 47K J R809 RK73GB1J473J PR 47K RK73GB1J274J 270K J R810 RK73GB1J102J PR 1 0K RK73GB1J103J OK J R811 RK73GB1J473J PR 47K RK73GB1J104J 00K R812 RK73GB1J223J PR 22K Desti nation Ref No Address b Parts No Description Parts No Description RK73GB1J154J R813 814 RK73GB1J473J PR R92 0670 05 R815 RK73GB1J104J PR RK73GB1J RK73GB1J K S76 0401 0 LAY RK73GB1J D1 4 DAN235K DE RK73GB1J D5 742 DE R92 1252 155355 DE RK73GB1J DAN235K DE R92 0670 02DZ5 1 Y ER DIODE RK73GB1J 02DZ18 X Y ER DIODE RK73GB D600 DA204U RK73GB 0601 25111 RK73GB1J103J D606 625 DA204U RK73GB 0626 INIS RK73GB1J122J D627 628 159355 RK73GB1J473J D629 DA204U RK73GB1J JM2904E R92 0670 05 C2 JM4558E RK73GB1J C3 JM78L05UA RK73GB1J473J C4 JM7808FA RK73GB1J102J C5 8009M RK73GB1J105J C6 62354GP RK73GB1J473J C7 U4094BCF RK73GB 4489V RK73GB1J473J 7808 RK73GB1J102J 78L05UA RK73GB1J473J 2408N10S12 5 RK73GB1J102J 5VL42C
62. AL SYSTEM SET UP INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced techni cians familiar with similar types of commercial grade com munications equipment It contains all required service in formation for the equipment and is current as of the publica tion date Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions These are issued as required ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment informa tion the full part identification number should be included This applies to all parts components kits or chassis If the part number is not known include the chassis or kit number of which it is a part and a sufficient description of the re quired component for proper identification SYSTEM SET UP Merchandise received Choose the type of transceiver Repeater programming amp setup See page 11 Installation in the optional space External speaker KES 4 installation Frequency range MHz TXIRX 146 174 TX RX 136 150 PERSONNEL SAFETY The following precautions are recommended for person nel safety e DO NOT transmit until all RF connectors are verified se cure and any open connectors are properly terminated e SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere e This equipment should be serviced by a qualified techni
63. BU409 V BU4094BCFV ir ae pea a a E E KEY LAMP TX BUSY Main DC 1 6 BACKUP Fig 8 Display circuit 21 TKR 750 22 CIRCUIT DESCRIPTION 5 6 DSP The DSP circuit filters transmit receive audio signal and encode decodes signaling OT DOT This circuit consists of IC618 612 613 IC614 IC603 IC606 1C608 610 IC616 and IC619 The receive signal DET is converted from analog to digital by IC614 with a sampling frequency of 16 128kHz The digi tized audio signal is sent to DSP 618 to process the signal ing signal and audio signal The processed digital audio sig nal is fed to CODEC 614 converted from digital to analog and the analog signal is output from pin 16 AOUTR Then the audio signal is amplified by IC619 B 2 passes through the IC619 A 2 low pass filter and goes to an electronic vo ume IC615 The transmit audio signal coming from 605 is amplified IC610 fed to pin AINL of CODEC 614 and con verted from analog to digital at a sampling frequency of 16 128kHz The digitized transmit audio signal is AGC pro cessed pre emphasized and filtered at 300Hz to 3kHz by DSP 618 and the resulting signal is fed back to CODEC IC614 and converted from digital to analog and the analog signal is output from pin 15 AOUTL The transmit signal from AOUTL is amplified by IC616 B 2 passes through the IC616 A 2 low pass filter and goes to the IC611 A 2 sum ming amplifier
64. Buffer amplifier C630 Voltage regulator D350 353 Varicap Frequency control Q1 3 1 i RF amplifier Q4 Transi Wide Narrow switch TX PLL VCO Unit X58 4790 10 IC300 IC PLL Q300 301 Transistor Active filter Q7 1 i Noise amplifier Q8 9 1 i RF amplifier Q10 1 i Current control 0302 Transistor Buffer amplifier Q350 351 FET VCO OSC Q352 354 Transistor DC switch Q11 1 i RF amplifier Q12 15 1 i Ripple filter Q16 19 1 i DC switch Q355 Transistor Buffer amplifier Inverter DC switch D350 353 Varicap Frequency control D354 355 Varicap Modulation TKR 750 PARTS LIST X New Parts indicates safety critical components L Scandinavia K USA Canada Parts without Parts No are not supplied PX Far East Hawaii England E Europe Les articles non mentionnes dans le Parts No ne sont pas fournis Y AAFES Europe X Australia Other Areas Teile ohne Parts No werden nicht geliefert TKR 750 FINAL UNIT X45 3620 XX Desti N nation Address Parts No Description Address Parts No Description TKR 750 3F H52 1621 02 CARTON CASE A10 4037 01 CHASSIS 402 0475 05 F ACC A62 0836 04 PANEL 1E J02 0492 04 FOO A62 0837 04 PANEL 1F J21 8402 04 HARDWARE FIXTURE ACC A62 0840 03 EL 1E J59 0302 05 GROMMET A62 0933 13 EL ASSY 01 0418 0 HANDLE ACC A62 0934 03 EL ASSY 3A 29 5389 0 OB VOL 3A 29 5460
65. C 0 010UF PC 1000PF P TA 4 7UF 0 0 68PF NODO Oc 0c ooomo 0 010U 3 0PI 40 3 0 0100 1000 22UF 1000PF 0 010UF 220 DOING 29 00 NODO 68PF 0 0 0 0 3 3UF CK73GB CK73GB CK73GB CK73GB NODO Cy Ge Cy 0 2 0 0 CK73GB CK73GB1H CC73GC CC73GC CK73GB 0 0 0 0 18PF 15PF 0 0 CO ccc NODO C73GC K73GB 0 0 K73GB 0 92 0628 10 C73GC 8 0 COO OO CK73GB CK73GB1H103 C92 0628 05 CK73GB1H102 CK73GB1C223 GB GB GB NOAA GB C92 0628 05 CK73GB1H102 CK73GB1C223 CK73FB1C334K 92 0628 05 GB GB GB FB 96 97 NOAA CO C ccc CK73GB1H10 98 GB C92 0628 05 F 99 GB CK73GB1H10 F 204 208 GC 5 0 C92 0628 C209 211 GB CK73GB C212 213 GC CK73GB CC73GC K73GB C73GC K73GB C212 213 GCH C600 GB1C C602 GB1C C E C605 GB C613 614 GB DOGG ooooeo 03K C73G C73G K73GB C73G CC73G GB1E103K GB1C104K GCH1H101J GCH1H220J GB1C104K
66. C802 805 CK73GB C806 CEO4EW C807 810 CK73GB C8 CEO4EW 92 0628 0 73FB1C 73GB1H C73GCH1 C73GCH1 C812 CK73GB C8 92 0777 ROLYTIC C8 CK73FB1E104K C C8 CK73GB1H102 C C8 CEO4EW1E470 CK73GB1E103K 92 0628 05 CK73GB1E103K CK73GB1H471K 92 0628 05 C8 K73GB1H102 821 822 C73GCH1H10 C823 92 0619 05 C824 73GB1H472 C825 T3GB1C104l 826 C92 0560 05 C827 C92 0633 05 C828 C92 0514 05 C73GCH1H270J C73GCH1H150J K73GB1H182K C73GCH1H270J 73GB1E103K 04 0154 05 SOC E40 5538 05 ASSY E04 0154 05 SOCKET A T C73GCH C73GCH 73GB1E 73GB1H K73GB1E103K E40 5538 05 SSY E40 6009 05 FLAT CABLE CONNECTOR GOOG E40 5703 05 SSY E40 5632 05 SSY E04 0154 05 OCKET E40 6102 05 SSY E40 5701 05 SY 92 0628 05 73GB1E103K 73GB1H471K 73GB1E103K 73GB1H471K OG BOG E40 6009 05 FLAT CABLE CONNECTOR TKR 750 PARTS LIST TX RX UNIT X57 6260 XX Desti nation Desti N Address Description nation Parts No Description E40 5887 05 PIN ASSY E40 5702 05 PIN ASSY E40 5704 05 PIN ASSY E40 5960 05 PI
67. CN601 2 Stjee e 12 wc 1 AIS i DG ATXGjee p DG ajos TD AlO1 0o ge G wit RX 102 95 RD AilQ3 ee e FO S aros BC1 RA qe o 5 RA aros BC2 RXG 5 se RXG A106 Z Bc3 SPM 6 oe 9 A NC 112 26 CLRC CONTROL 1 0 TEST SPKR PTO 5C 3 6 9 12 15 GND o G DISPLAY UNIT B 2 a 9 12 x54 333 2 5 8 11 14 x On O Og Og o m o nNMOONT UY 99955890055 35523 1 4 7 10 13 r gt ST EL ol 9 lo 52 RX PLL VCO X58 4780 10 RX PLL VCO X58 4780 10 TX PLL VCO X58 4790 10 Component side view Foil side view Component side view x LI Put eua 280 Component side Foil side Component side Foil side PC BOARD VIEWS TKR 750 TX PLL VCO X58 4790 10 Foil side view TT gi P pur y R36 ens les 2 aee c G TKR 750 PC BOARD VIEW DISPLAY UNIT X54 3330 20 Component side view ER GND D50 il able 85 7 a GEL 2 E 8 SOT q 9 PU mi aa wx ie Repo 56
68. ER E e MEN Ve EU A pe VASO E e vo Y HK 3 77 050 Sala 8 DTA144EUA 25 4116 25 1132 DTA114EUA LA4422 NJ M2904E DAN235K TA78LO5F DA204U DTC363EK 25C4215 25 3357 DTC114EUA M4558E HSM88AS DTD114EK 25C4617 DTC144EUA EM n EE 155226 E DTD123EK Cg 5 2SA1586 B K B 1 25 3120 U GND 25 C3356 yn 3 C B IN MA742 2SK508NV UPA672T TC7S00F AN8009M TK11050M TC7SO4FU 1 S e 54 lt R TC7S66FU 5 Component side Foil side F __________ views TKR 750 DISPLAY UNIT X54 3330 20 Foil side view BACKUP MAIN DC RED RN an K CN aei x E M J 8 K VAG Sea Hee I Y A 8 e Component side Bz 0501 0507 77 side 30622M 4 113GP 29 020 90 AT2408N 10S12 5 BU4053BCF SA7025DK NJ M78LO5UA AK4550VT M62364FP RH5VL42C BU4094BCFV TC74LVX4245FS M62354GP gt TC74VHC4040FT 320VC5402PGE TA75WO1FU 75501 7808 7808 ADM 202EARN 3535 TC75W51FU 16 IN GND A B C D E G K P R S TKR 750 PC BOARD VIEWS 2 FINAL UNIT X45 3620 XX 10 K E 11 K2 Component side view
69. FF Transmission Narrow 1 VCO A CH TX VCO A center VCO B CH TX VCO B center Transmission 45 TKR 750 ADJUSTMENT ATTEN 20dB MKR 13 50dBm ATTEN 10dB AMKR 42 17dB RL 10 0dBm 10dB RL 32 0dBm 10dB 25 00kHz SMF 5 5 7 5kHz 5 5 7 5kHz MOBUL Max D NOT FOUND More than 40dB BN G CENTER SPAN 50 00MHz CENTER 44 85000MHz SPAN 50 00kHz RBW 300kHz VBW 300kHz SWP 50ms RBW 300Hz VBW 1 0kHz SWP 2 0sec Fig 1 Fig 2 Adjustment Points CN8 GND BLACK CN7 BACKUP ORANGE e 0 91910 Wh 119 CN4 o L18 CN6 MAIN DC RED Op NARROW WIDE s L14 ATTEN 10dB RL 32 0dBm 10dB More than More than AMKR 46 000dB 15 00kHz 3dB Max 3 75kHz 3 75kHz AMKR 15 00 2 46 000dB More than 40dB A15kHz CENTER 44 85000MHz RBW 300Hz VBW 1 0kHz Fig 3 FINAL UNIT X45 362 A 2 Component side view 7T PAS TP102 TX L15 h CN2 O TX RX UNIT X57 626 A 2 Component side view 46 TC350 VCO A A2 TX VCO X58 479 TC351 VCO B TC350 VCO A RX VCO X58 478 TC351 VCO SPAN 50 00kHz
70. GB1J224J GB1J104J GB1J393J GB1J154J R92 2687 05 R R R R F53 0217 05 0000 J13 0071 05 FUSE HOLDER R92 0670 05 L40 4775 34 ALL FIXED INDUCTOR 47NH RK73GB1J5R6J L40 6875 34 ALL FIXED INDUCTOR 68NH RK73GB1J821J 820 J 134 4519 05 R CORE COIL RK73EB2B331J 330 J 134 4518 05 R CORE COIL R12 6427 05 ING POT 47K 134 4519 05 R CORE COIL 5 6 J C C CO gt R R R R S76 0426 0 LAY 134 4523 05 R CORE COIL 134 4517 05 R CORE COIL 155226 TKR 750 FINAL UNIT X45 3620 XX DISPLAY UNIT X54 3330 20 TX RX UNIT X57 6260 XX PARTS LIST Address Parts No Description Desti nation Address Parts No Description Desti nation 02DZ5 1 Y 155355 HSM88AS 155355 25 5 27 RB051L 40 MINISMDCO50 02 DSA3A1 A75WO1FU K11050M JM78L05UA C3356 R24 2503357 3075 25 3478 22 25 1824 25 4116 DTD123EK 9 04 471 5 ER DIODE DE DE DE ER DIODE ODE VARISTOR DIODE OS IC ANALOG IC BI POLAR IC TRANSISTOR TRANSISTOR FET FET FET TRANSISTOR DIGITAL TRANSISTOR THERMISTOR ISPLAY UNIT X54 3330 20 CP501 504 R502 503 R505 R506 R507 R508 R509 R510 B30 2151 05 92 0628 05 92 0501 05 CK73GB1C104 CC73GCH1H470J CK73GB1C104 73GB1H103 92 0628 05 73GB1E103
71. IRE WITH C90 2146 05 ELECTRO 25WV E37 0965 0 LEAD WIRE WITH T CK73GB1H102 CHIP C F E37 0967 0 FLAT CABLE 36 CK73GB1H102 CHIP C CC73GCH1H CHIP C deo X EX E70 0402 05 AL BOA CC73GC CH F05 1537 05 F LADE 15A 32V CK73GB CH F09 0445 05 SUB CK73FB CH F09 0471 05 TOR CK73GB CH F10 2374 04 G PLATE TX RX CK73FB F10 2379 04 G CASE TX RX COP CCQ CI CC73GC F10 2409 04 DING CASE TX RX FOIL C93 0601 0 F20 3322 04 ING SHEET C93 0565 0 C93 0566 SPRING C93 0570 0 H SPRING US SHEET CHASSIS CK73FB1H US SHEET PANEL CK73GB1H ION ACC C93 0603 0 C93 0600 0 ION ACC C93 060 G02 0576 14 G02 0885 13 G10 1263 04 G10 1264 04 G13 1801 04 ma m om cy cy G13 1802 04 25 0029 04 25 0747 04 25 0762 04 25 2328 04 BAG 60 110 0 07 CK73FB1C ECTION BAG 250X350 CK73GB1H ECTION BAG 120X300 CK73FB1E4 ECTION BAG 80 250 0 07 CK73GB1H TKR 750 PARTS LIST FINAL UNIT X45 3620 XX Desti nation Desti N 2 Address Parts No Description nation Parts No Description CK73FB1H103K CK73GB1H102K C93 0603 05 CM73F2H121J 93 0563 05 0 010UF L34 4520 05 1000PF L34 4523 05 K R CORE
72. LATOR h 9 p p F1 F2 PF3 PF4 PF5 PF6 ESOS 9 slo oj ol 3 5 6 Q4 N 2 soz Dios 2403 TX DRIVE AMP gt AT ST oT 95 24 ol ni NSEN NSN NSKA NS On NSA N SQ S eD506 LA 501DD 0523 2 FINAL AMP Saal an yom yO 202 PFOS qoe ooze 20507 LA 501DD UPA672T 491010 1 5501 5502 5503 5504 5505 5506 eps zj r I c520 p 01u v AE el m 1 2 6 16 in N al 7 7 E 77 Cla mO AVA TO o o x o SHIFT ul Fy tts TH el C505 tials 020 x20 TO TO no 19 19 neo 10 p RES STER volt 1 lt Q BU4094BCEV de Zz ogm C30 N 2 0517 renn 34 nl No eh ml 8 n Sob e m 560p UPA672T in 77 77 77 77 77 77 m at BU4094BCFV 2 og 1 R15 eC19 414 5 mE ecos eL 10 4 11 Barrel 8 2 ds oj VOLTAGE SNE C31 en s 6 7 REGULATOR 680p lol m R t 560p N O in DC N w LO Nt m M WITCH WITCH 6 507 Xn Dm SWITCH d BE SME r DE SNE 2 TA78LO5F Fine m pis TT ET r 0 NT 0512 ci 0513 el gt 0514 ci Kt T L elo eje e s x x T P d 72 UPA672T UPA672T 1 4 T T Ela SNE 727 3 E
73. Monitor on off Channel up BUSY indicator Lights green while a signal is being received 9 TX indicator Lights red while transmitting iu BACKUP MAIN DC BACK UP S 00000 0 0000 1 TX OUT jack Connect a TX antenna or a duplexer to this receptacle 2 CONTROL 1 0 jack Connect an external programming device or repeater controller to this DB 25 interface 3 FUSE Insert 15 A blade fuses into these fuse holders 4 RX IN jack Connect a RX antenna or a duplexer to this BNC recep tacle 5 DC 13 6V type DC 13 2V type jack Connect a 13 6 V K type or 13 2 V E type DC power supply to this jack 6 BACKUP battery terminal 7 TEST SPKR jack Test input output jack Connect an external speaker to this jack Cooling fan 9 Optional space For external DC power supply or duplexer etc TKR 750 OPERATING FEATURES 2 Two 7 segment LED displays e Channel display 1 16 While operating normally in user mode e When the displayed channel is contained in scan se quence the right side decimal point is displayed lt A e When the displayed channel 15 the priority channel the left side decimal point is displayed N pa xi HE Lit e is dis
74. N ASSY 1 0K 10K 33K 100 47K 11 0844 05 SHIELD F53 0217 05 FUSE 22K 47 270 18 L72 0366 05 CERAMIC FILTER L72 0376 05 CERAMIC FILTER L34 4616 05 AIR CORE COIL L34 4666 05 COIL L40 1295 34 SMALL FIXED L34 4666 05 L40 2275 34 L40 5675 34 L40 1581 37 L40 1885 34 ooooeo L40 3381 37 L40 1005 34 L34 4527 05 L34 4526 05 L34 4527 05 L34 4526 05 L34 4527 05 L40 1095 34 L40 1005 34 L40 8271 34 PDD L40 1095 34 L34 4530 05 L40 5675 34 L40 4775 34 L40 1005 34 L40 3375 34 L40 1085 45 L40 1005 34 L92 0140 05 L92 0158 05 Cy Cy Cy 192 0140 05 140 1085 92 NDUCTOR 100NH L92 0140 05 L77 1762 05 ESONATOR 44 395MHZ L77 1848 05 8MHZ L78 0431 05 OR 14 7456M R L77 1799 05 ESONATOR 16 515MHZ L71 0513 05 F 44 85MHZ NARR L71 0512 05 F 44 85MHZ WIDE P600 601 R90 0725 05 P602 R90 0724 05 P603 R90 1019 05 5 5 Co 0 00 P604 605 R90 0725 0 P606 R90 0719 0 P607 608 R90 0725 05 P P609 R90 1019 05 P610 6 R90 0750 05 PLE RESISTOR P612 6 R90 0725 05 P615 6 R90 0750 05 TIPLE RESISTOR C 0ccc RK73GB1J272J 2 7K
75. N N 22 0516 2 R19 eR20 R21 eR23 t e Ll RP UPA672T 2 al ih eh 0 ne Bl A eh al nso a 47k 0 O 47k a 04 5 lt lt DC SWITCH O lt 215 nol MY Lao 0 no C512 0 01u Uu a al 5 SHIFT THERMAL NOM Lo RF DETECTOR 59 1F a 2 RESISTER SENSE e b 79 SHIFT RESISTER 2 IC503 e 3 BU4094BCFV I 2 DC o 423 8 1 eis e D514 e TA7 SWO 1FU eRAT 7 DA204U DC SWITCH LED x 0O e e 6 lt 0 gt 0508 A lt G gt 212 x 5 7 DTA114EUA R516 Sov a in E 77 1 2K A lt R gt m a a in m 4 0 E NIO alo m m eCN5 IS Sa 3 1 24 d SFe AKG 3 Zoz 5 0503 KON n 2 DOU De B30 2151 05 Ww x gt e eal 1 fn mx SWITCH DC SWITCH a 159 oa 1 E XO 0506 0510 gt mr MIN DTA114EUA R517 LED DTA114EUA R519 LED US DN 820 A G 2k A lt R gt er 1 CN502 Q7 ae I XIN lt 4 O oly 1 2W A lt R gt 2W A lt G gt 25K1824 kar I 47 0504 0505 SE B30 2151 05 B30 2151 05 100k Q525 GND D6 25C4116 Y S525 25K 1824 g 2 R520 PSW SURGE ns 7502 DAT ABSORPT ON VOLTAGE 470 G R LATOR 5 t SbF Aly Shy ver Jelle pe 172W 12 sous i wie ls mle o X45 3620 XX B 2 ins uns UNST UNST FIT mao m o B
76. NE 541729 4 1C613 0604 C738 z x1 lt on 2 SEA 7 6 A7 B6 2105 99 COUNTER 2SK1824 D diu oz z 00 DI 2 6 z I zo xo 7 AB 87 21 0 DC Ad 83 ez 9 5 2248 VDAref CLK EE SWITCH R734 EEE 5 9 m a GND 1 1 5 47k RESET Lo 774 lu 2750 GND2 GND3 GND2 GND3 GND 12 22k 5 eR674 C649 100k BC4 C701 699 10010 BC3 BC2 BC1 33p 10u10 x 1C607 6671 1000 1000 1000 1000 1000 1000 1000 1000 CN606 E40 5960 05 D SUB C702 10410 772 827 eR751 0 22410 22010 RXI Q 773 828 R752 1 1 1x0 8 222410 2 2u10 TXI 601 E40 5701 05 R760 792 C794 804 7 816 eC818 eC819 820 _ a D600 606 625 629 DA204U 0600 602 604 2SK1824 1C600 2408 10512 5 1C604 30622M4 113GP 1 609 29 020 90 1C615 M62364FP 1C620 ADM202EARN 1C625 626 XC62FP3302P 0601 25111 0601 603 605 609 611 DTC114EUA 1 601 RHSVL42C 1 605 BU4053BCF 1 612 TC7SO4FU 1 618 320VC5402PGE 1C621 TC7SOOFU 1C627 628 630 TA78LOSF D626 MINISMDE190 0606 DTC363EK 1C602 623 BU4094BCFV 1 607 611 616 617 NJM4558E 10613 TC74VHC4040F
77. NR i 1C6 as DP 0350 353 15 282 H CODEC EPR CK DTC114EUA l i 10615 DTC 144EUA NJM4558E _ 502 i RD DE I DEO DT DAC FCT DE i 5 2 E rezsssor FCR 25C 146 GR 5CT S TAO VEL p Ada 1C610 AKLSSOVT 1 616 2 1 616 2 1C611 A 2 LD2 PSW Se AVR x3 i TA75S01F NJM4558E NJM4558E 1 4558 M62364FP 8CLT L I PPLE 1011 1C4 16 8M Ma NJM78LO0SUA NJM7808FA K1 EE o M REG EE Tee a AINE AOUTL BCT Ak r sw le i 25C4116 Y MIS i E MB ERES L MB Q12 Q16 0502 SC 28C4146 GR 25B1132 Q R EUN 25A1586 Y GRO TD C605 A 2 a 1 605 2 BUP TEMP BUP TEMP LIPPLE 8R i gt SB 4 SB 18040538CF gror BU4053BCF LDT LDR KE L0R LDT i tso T LD4 DAT CLK FWD FUD NJM78LO5UA 1C506 t VR501 NJM4558E TAZB8LOSF TAS asa RSS d EPR EPT SV a17 110 HK SER TA7808F by ey ios FWD BATT DTC114EUA Lus CP DP PSW AVR DTC114EUA Care Sy i xp BDX0 F ERS AVR 1 he 1C507 CLK SOE SOE STB1 584 4 le 4 TAZBLOSF aba E E DIVIDER e 28C6146 GR 25 CLK SOE EU TXD1 RXD1 PTT DSP jcneoz T i LIPPLE i 10618 Q14 1 5 CLK SOE CLK SOE SOE Psw TMS320VC5402PGE E 2504116 GR ANS009M 1 1 Shift Reg 1 STB4 5781 5781 Psw T cweog 16 515M i
78. OK MIC MIG PTT GND NC SB Power supp To X54 B 2 display unit MIC ground Ground No connecti switch NC No connecti Ground 5M Hook detection input RXD input MIC signal input PTT input TXD output on ly output after power on Common 5V output Volume control input for AF signal Connector No a Terminal E PTT TXD ME MIC HOOK RXD NC connection Power supply output after power switch Ground PTT input TXD output MIC ground MIC signal input Hook detection input RXD input No connection Terminal function CN1 Use for RX helical BPF tuning Coaxial CN2 Use for RX MCF tuning MIC ground 1 HOOK RXD SOE PTT TXD KEY output 010020 MIC signal output Volume control output for AF signal Common SV input KEY input 4 KEY input 5 KEY output 2 KEY output 3 1 Hook detection output RXD output Output enable for shift register PTT output TXD input CN3 Use for RX Coaxial requency adjustment CN4 Use for RX MCF tuning CN14 To X57 B 2 control section of TX RX unit gt connection Detection signal output connection Ground Squelch signal output RSSI signa No connection Data input for PLL Clock input for PLL output 47 TKR 750 48 Connector No Terminal No Terminal Name TERMINAL F
79. RPORATION P O BOX 22745 2201 East Dominguez Street Long Beach CA 90801 5745 U S A KENWOOD ELECTRONICS CANADA INC 6070 Kestrel Road Mississauga Ontario Canada L5T 1S8 KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembr cker Str 15 63150 Heusenstamm Germany KENWOOD ELECTRONICS BELGIUM N V echelsesteenweg 418 B 1930 Zaventem Belgium KENWOOD ELECTRONICS FRANCE S A 13 Boulevard Ney 75018 Paris France KENWOOD ELECTRONICS U K LIMITED ENWOOD House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B V Amsterdamseweg 37 1422 AC Uithoorn The Netherlands KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENWOOD IBERICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001 499 074 16 Giffnock Avenue Centrecourt Estate North Ryde N S W 2113 Australia KENWOOD ELECTRONICS HONG KONG LTD Unit 3712 3724 Level 37 Tower one Metroplaza 223 Hing Fong Road Kwai Fong N T Hong Kong KENWOOD ELECTRONICS TECHNOLOGIES S PTE LTD Sales Marketing Division 1 Ang Mo Kio Street 63 Singapore 569110
80. SERVICE MANUAL 2001 1 PRINTED IN JAPAN B51 8556 00 N 1435 Knob DC source K29 9106 04 Panel Outer Knob VOL A62 0840 03 K29 5389 03 KENWOOD Panel assy Key top Modular jack A62 0934 03 K29 5460 02 E08 0543 05 CONTENTS GENERAL oae ode 2 TERMINAL FUNCTION 47 SYSTEM SET UP 2 WIRING 51 OPERATING FEATURES 3 PC BOARD VIEWS REALIGNMENTT 11 RX PLL VCO X58 4780 10 53 13 PLL VCO X58 4790 10 54 15 DISPLAY UNIT X54 3330 20 55 DISASSEMBLY FOR REPAIR 16 FINAL UNIT X45 3620 XX 59 CIRCUIT DESCRIPTION 17 TX RX UNIT X57 6260 XX A 2 65 SEMICONDUCTOR DATA 23 TX RX UNIT X57 6260 XX B 2 71 DESCRIPTION OF COMPONENTS 25 SCHEMATIC DIAGRAM 77 PARIS LISTE 27 BLOCK DIAGRAM 89 EXPLODED VIEW 37 KES 4 EXTERNAL SPEAKER 92 PACKING issa aa 39 SPECIFICATIONS 93 ADJUSTMENT 40 TKR 750 GENER
81. SY Main DC sw AT2408N10512 5 RHSVL42C SOE 5783 4 0506 D507 Back UP Al 1 3 CM COUPLER GB SW GS Se i EEPROM 2503357 DTD123EK i SCLK 04 05 FAS i i SDAT Shift Reg 6 sc Drive AMP TEMP REV FWD RX I RXO i i EMON TX1 TXO IC602 AM AMPSW DET DET SOE CLK A11 3 PT17PTA BU4094BCFV gt 85232 varm 6 Jon STB2 STB3 SFT BC1 4 RXDO TXDO LOR VER Rxp2 TXD2 1 2564116015 HSMBBASx2 CA CLRC AC 16620 AT LD1 LDZ LDR LDT ADM202EARI Pc s 1 1 t etse Jer Po et LO a MEER ONE TESES et Oe Gm or ter CN601 Control 1 0 D SUB 89 TKR 750 KES 4 EXTERNAL SPEAKER When Using an External Speaker 1 Make sure the unit s power is tuned off 2 When using the external speaker remove the jumper lead from the connector and attach the speaker cable 3 When not using the external speaker replace the jumper lead and insert the connector into the speaker jack pin9 and 12 Speaker cable SS lead Black White lead Crimp terminal E23 0613 05 Specifications Speaker size 120mm Maximum input power 20W mpedariCe s cto tr tns 4Q Frequency response 100 to 5000Hz Dimensions W x H x D 127
82. T 1 619 TC75W5 1 0 10622 TC7S66FU 81 D627 628 155355 0610 25 506 5 1C603 606 TC74LVX4245FS 1C608 610 TA75SO1F 1 614 4550 1C624 XC62FP1802P B D ES A H J L ee __ ____ R T Note Components marked with a dot are parts of pattern 1 CIRCUIT DIAG RAM TKR 750
83. TC114EUA 117 0dBm 24 RX ANT gt o o U U M gt gt gt gt A 80 A on C E NH yo K E AA Q 8 5 R 750 CIRCUIT DIAG RAM Note Components marked with a dot are parts of pattern 1 TX RX UNI T CONTROL SECTION X57 6260 XX B 2 TOM Ee A C783 470p SURGE PROTECTOR Q610 se V UNUS EGGE 251506 5 C 00 2 lt lt lt 55906 10624 1 627 SV AVR D627 628 sEN OO 00 9 5 1 80v XC62FP1802P 1 AVR TA78LOSE 7 96v n REVERSE 16629 LA4422 E40 6102 05 39 3 INB 4 CURRENT 25 E vout VIN our IN 4 0609 610 AUDIO AMP SB R814 47k a 5 INA lt m ONE o i 5 gt 0628 DE SWITCH u K L Z o SB 5 2 GND OUTX PE E lu o ae GND DC SWITCH 155355 CURRENT N amp 2 ON TS 010625 AVR 10628 10621 INVERTER PROTECTOR 2 6 NC 0 XC62FP3302P TA78LOSF TC7SOOFU 5 0609 els 9 DTC114EUA el C601 u 2 NAND GATE lt RHSVL42C 5 06V OUT R603
84. UNGTION Terminal function EE E ENEE O O N O N N 0 EP LDR LDT DT CK Enable input for RX PLL Enable input for TX PLL Lock detector for RX PLL Lock detector for TX PLL Data input Clock input Strobe input for shift register RF power down signal output Latch data input for DA converter Backup signal output Power switch input High temperature detector signal output Output enable for shift register Ground Modulation signal input for VCXO Modulation signal input for VCO Ground Ground No connection No connection Power supply ou er powe switch Power supply ou er powe switch Power supply ou er powe switch Power supply ou er powe switch No connection Common 8V output Common 8V output Earth Power supply input Power supply input O WN Earth Reserved 8V output during transmission TX power control signal output Fan control signal output RF power down signal input Main DC BAC High temperature detector signal UP status input input Receive signal input Coaxial Transmission signal output Coaxial TX RX Unit X57 6260 XX B 2 Control Section Terminal Terminal Name Terminal function SB SB OOO 1 s o oo Power supply output after power switch Power supply output after power Switch Ground No Connectio
85. ammable function input output 2 Programmable function input output 3 Programmable function input output 4 Programmable function input output 5 Programmable function input output 6 BOOOQDHODOOOOOO SOG2Q000 00600 Connector Terminal Name Terminal function Power supply output after power switch 1A maximum Power supply output after power switch 1A maximum No connection Ground Ground Speaker ground RX data output RSSI output Internal speaker input Auxiliary output 1 Auxiliary output 2 External speaker output Auxiliary output 3 Auxiliary output 4 O O OO 0 00 Auxiliary output 5 20000 209004 51 MIC INT SP DIS R 750 TKR 750 WIRING
86. an be also inhibited if the OT Reverse Burst function is set to No 7 4 DOT Turn Off Code Time During repeat with DOT tones the repeater re transmits a specific turn off code when it detects the radio using the repeater has un keyed and also sent the turn off code squelch tail elimination This mutes a receiving radio s speaker audio before its receiver circuit shuts off causing squelch tail noise in the speaker audio The TKR 750 can select the time between 140 to 200ms that the DOT turn off code is sent Typically this time should not have to be adjusted from the default value 7 b Off Hook Decode The TKR 750 is able to decode QT DOT regardless whether the local microphone is in the on or off hook condi tion When the Off Hook Decode function is enabled the TKR 750 is capable of OT DOT decode even though the mi crophone is in the off hook condition or a local microphone is not installed 8 Scan Feature 8 1 Scan Operation Providing that the TKR 750 contains two or more non pri ority ADD channel or one or more non priority ADD channel and Priority channel it starts scanning once the Scan On function is executed and displays SC on the 7 seg LED Scanning stops temporarily if any following conditions be come valid 1 if a RF carrier and a valid OT DOT is present The receiv ing channel number is displayed and the received audio is heard from a speaker 2 if a RF carrier is present providing that the Monitor On
87. bly by pulling to front while you are pulling up the tabs TKR 750 CIRCUIT DESCRIPTION 1 Outline The TKR 750 is a VHF FM repeater designed to operate in the frequency range of 136 to 174MHz The unit consists of receiver transmitter phase locked loop PLL frequency synthesizer and control circuits 2 Receiver Circuit The receiver is double conversion super heterodyne de signed to operate in the frequency range of 146MHz to 174MHz 136MHz to 150MHz K2 The receiver circuit located in TX RX unit X57 626 A 2 consists of the following 2 1 front end circuit 2 2 first mixer 2 3 IF amplifier circuit 2 4 audio amplifier circuit and 2 5 squelch circuit 2 1 Front end Circuit The front end circuit consists of BPF L2 L3 RF amplifier Q1 and BPF L5 L6 L7 The helical BPF covers frequency ranges 146 to 174MHz K E and 136 to 150MHz K2 with a passband of 3 0MHz The BPF L5 L6 L7 attenuates the unwanted signals and sends only the necessary signal to the first mixer DBM A1 2 2 First Mixer The signal from the BPF is heterodyned with the first lo cal oscillator signal from the PLL frequency synthesizer cir cuit at the first mixer DBM A1 to become 44 85MHz first intermediate frequency IF signal The first IF signal is fed through two monolithic crystal filters XF2 Wide XF1 Nar row to further remove spurious signals 2 3 IF Amplifier The first IF signal is amplified by Q2 and Q3 and
88. cian only SERVICE This radio is designed for easy servicing Refer to the schematic diagrams printed circuit board views and align ment procedures contained in this manual RF power A personal computer IBM PC or compatible programming interface KPG 46 and programming software KPG 66D are required for programming TKR 750 OPERATING FEATURES 1 Controls and Functions 1 1 Front Panel O KENWOOD e 1 Speaker 2 CH STATUS Display Two 7 segment digits display the channel number or sta tus 3 VOLUME control Rotate to adjust the volume 4 DC source switch 5 Dc source indicator Lights green when DC source is applied from the DC 13 6V jack DC 13 2V jack on E type versions Lights red when DC source is applied from the BACK UP battery terminal 6 MIC jack Connect a microphone to this 8 pin modular jack 1 2 Rear Panel ews latus O O 4 Y AMANDO RED BACKUP J mc e BS e da o OOOO ClO O OOO a E O o 990000000 O 9 6 7 Programmable Function keys Press these keys to activate their programmable func tions PF1 key left side PF2 key PF3 key PF4 key PF5 key PF6 key right side None No function Repeat disable enable TX disable enable Take over
89. converts the RS 232C logic level to the TTL level The KPG 46 connects the microphone connector of the TKR 750 to the computer s RS 232C serial port 3 4 Programming Software Description The KPG 66D programming disk is supplied in 3 1 2 disk format The software on the disk allows a user to program TKR 750 repeater via the programming interface cable KPG 46 3 5 Programming With IBM PC Data can be programmed into the flash memory in RS 232C format via the microphone connector TKR 750 Fig 1 4 Firmware Programming Mode 4 1 Preface The TKR 750 uses flash memory to allow it to be easily upgraded when new features are released in the future 4 2 Connection Procedure Connect the TKR 750 to the personal computer IBM PC or compatible with the interface cable KPG 46 Connec tion is the same as in the PC mode Notes You can only program firmware from the 8 pin micro phone connector on the front panel Using the 25 pin logic interface on the rear panel will not work 4 3 Programming 1 Start up the programming software Fpro exe 2 Set the communications speed normally 115200 bps and communications port in the configuration item 3 Set the firmware to be updated by file name item 4 Turn the TKR 750 power on with the PF1 key held down Hold the key down for one second until the 7 segment display changes to P G When P G ap pears release your finger from the key 5 Check the con
90. crew N35 3006 45 x 5 EE 707 Pamphlet E gt 708 Warranty card K K2 CSS LS 11 Instruction manual p 3 B62 1327 10 64 Handle K01 0418 15 17 DC cord lt E30 3427 15 8 Front glass 55 Protection bag B10 2635 04 H25 0762 04 10 Filter 22 B11 1259 04 56 Protection bag 25 2328 04 49 Cushion G13 1801 04 50 Cushion G13 1802 04 54 Protetion bag H25 0747 04 61 Hardware fixture J21 8402 04 e 18 Lead wire with connector E31 3228 05 36 Fuse Blade 15A 32V F05 1537 05 710 53 Protection bag 709 Packing fixture H25 0029 04 Carton board 712 Protection bag 2 Packing fixture 711 Packing fixture 57 Item carton case 3 H52 1621 02 Parts with the exploded numbers larger than 700 are not supplied 39 TKR 750 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications Standard Signal Generator SSG Frequency Range odulation Output 136 to 174MHz Frequency modulation and external modulation 0 1uV to greater than 1mV Power Meter nput Impedance Operation Frequency Measurement Capability 50Q 136 to 174MHz or more Vicinity of 50W Deviation Meter Frequency Range 136 to 174MHz Digital Volt Meter DVM easuring Range Accuracy 1 to 20V DC High input impedance for minimum circuit loading Oscilloscope DC through 30MHz High Se
91. ction HD3 HPI data bus TOUTO Not used No connection EMUO Emulator 0 to JTAG connector EMU1 OFF Emulator 1 to JTAG connector TDO Test data output to JTAG connector DI Test data input to JTAG connector CK Test reset to JTAG connector Test clock to JTAG connector MS Test mode select to JTAG connector NC14 Not used No connection CVDD VDD for core CPU 1 8V HPIENA Not used Pull up Vss GND CLKOUT Not used No connection HD4 HPI data bus X1 16 515MHz System clock X2 CLKIN 16 515MHz System clock RS DSP reset input 105 Not used No connection Not used No connection 106 GND 107 109 Not used No connection 110 Not used No connection 111 GND 112 DVDD VDD for 1 0 pins 3 3V 113 119 D6 D12 Not used No connection 120 HD5 data bus 121 123 D13 D15 Not used No connection 124 HD6 HPI data bus 125 CVDD VDD for core CPU 1 8V 126 127 NC16 Not used No connection HPI data strobe 1 Pull up 128 Vss GND 129 HDS2 HPI data strobe 2 Pull down 130 DVDD VDD for I O pins 3 3V 131 134 A10 A13 Not used No connection 135 HD7 data bus 136 141 A14 A19 Not used No connecti 142
92. de 11 12 13 71 72 14 1 11 12 13 14 ARD view TKR 750 ttt tt 5 K2 Foil si KE 11 Component side Pattern 3 Pattern 4 aN cc aa 74 Foil side B eae NEBE TX RX UNIT X57 6260 XX B 2 10 72 0757 01 B 2 ef No Address Ref Address Ref No Address Ref No Address Ref No Address R Ref No Address Ref No Address 73 E Q603 gt EJ Er roy 44 P Je NUR leer c aa 1178 ET a a a 14 did x 0719 zu 5 20 m po 55 NE Roa meas IH 88 2 ea 2 a 25 25 Component side Address Ref No j Address Ref Address Ref No Address Ref Address Ref No Address Ref Address Ref No Pattern 1 Pattern 2 Pattern 3 Pattern 4 Foil side 11 Connect 1 and 4 12 13 75 A NNI B 2 4 D gt L N P LLLI R MELIA T Note Components marked with a dot are parts of pattern 1 CIRCUIT DIAG RAM
93. de output 4 When the operation is checked in PC test mode after the PTI PTT signal input modification and the maximum deviation is adjusted the CLRC Clear code for scrambler voice from the local microphone is not modulated In this DEO Detection signal output sis case remove the CN601 12 pin PTO cable and connect it PTO PTT signal output unc to the land of the display unit X54 333 from the voice 5C 5V output scrambler The voice from the local microphone can be GND modulated in PC test mode 14 Fig 2 Display unit Foil side DM NM 13 TKR 750 14 INSTALLATION 3 External Speaker KES 4 The TKR 750 has a internal built in speaker 80 the external speaker output from the TEST SPKR connector 15 pin on the rear of the radio is 4W 4Q Use external speaker KES 4 3 1 Connection for the KES 4 With the TKR 750 When taking the AF output from the TEST SPKR connector 15 pin on the rear of the radio The following tools are required for changing the connec tor Extracting tool The following extracting tool is recommended Molex Inc Order No 11 03 0002 1 Remove the connector with jumper from the external speaker connector on the rear panel of the radio Fig 4 1 Note Save the jumper which is required when the radio is used without the external speaker 2 Remove the terminals with the jumper from the connec tor housing holes number 9 and 12 us
94. dition becomes valid active Low outputs a Low OV when the condition becomes valid TKR 750 OPERATING FEATURES REALIGNMENT 18 Channel Select AUX I O Ports 1 4 1 or all 4 can each be set for Chan nel Select providing up to 16 channel selection capability These are 1 to 4 bit Binary Coded Decimal BCD inputs AUX 1 is a least significant bit LSB When all of AUX O Ports 1 4 set to Channel Select 1110 input LSB on he right side signifies the Channel 1 and 1101 input sig nifies the Channel 2 When the Channel Select function is set to any AUX ports the Channel X function Channel Up Channel Down Channel 1 etc can not be set to the AUX Input ports but can be set to the PF Keys Normally he channel control is controlled by the Channel Select func ion If the Take Over function is executed the channel con rol is disabled to be controlled by the Channel Select and enabled to be controlled by the PF Keys 19 DC Power Save The TKR 750 has the DC Power Save feature The DC Power Save Mode is activated when the DC Power Save On function is executed When the DC Power Save Mode is activated all panel LEDs except the Power LED are turned off and the audio amplifier and the DSP becomes inactive When the Display On function is executed while the re peater is in the DC Power Save Mode all panel LEDs be Come active as normal status indicators on the repeater and the audio amplifier and the DSP
95. e CPU to parallel data and light LEDs 0507 0510 and 0511 are switching transistors which control two color LED D505 IC506 and IC507 are three pin power supply ICs which produce power used for the display circuit TX RX unit X57 B 2 CONTROL vice Data such as the operating status are programmed into X600 the EEPROM 12600 14 754 MHz 5 3 CPU Clock Shift There are the 14 754MHz clock for the CPU IC604 and the 16 515MHz clock for the DSP IC618 at the control sec SER tion of TX RX unit X57 626 When these clocks multi nulti IC603 606 plexed with the reception frequency they become an inter nal beat signal prevent this by tuning 0600 and 0604 on the clock frequency is shifted Shift on off can be set 16518 h h ing i through programming 5 4 Shift Register Circuit 0600 Serial data is sent to the shift register IC502 to IC505 BEAT located in display unit 12602 623 IC7 located TX RX SHIFT unit from the CPU IC604 to control various functions in the CELL OSE eS Fig 7 Control circuit Display unit X54 333 20 A 2 Np EP ea ee a BS ee JET en pr ee 1 PF1 6 6 St cv N CLK SOE CLK SOE CLK SOE CLK SOE STB1 STB1 STB1 STB1 Reg 4BCF Shift 1 Shift Reg 3
96. e to switch transmission output on a per channel basis When the TX High Power function is en abled the transmission output is set to high power 16 Fan Action The TKR 750 has a cooling fan The Fan Action function determines whether the fan is continuously operated or op erates in response to high temperatures only 17 AUX Input and Output There 6 programmable AUX I O Ports 1 6 pins 20 25 and 3 programmable AUX Input Ports 1 3 pins 4 6 on the rear 25 pin D Sub connector CONTROL and 5 programmable AUX Output Ports 1 5 pins 10 11 13 15 on the rear 15 pin TEST SPKR connector The 6 programmable AUX I O pins are primarily intended for remote control interfaces Each AUX I O Port can be set for AUX Input AUX Output remote Channel Select or Multi Table Select types The AUX Input Port can be set execute a single input function or a set of up to three functions when the port is activated If the port type for an AUX I O Ports 1 6 is set for AUX Input it will also appear AUX Input window for function programming The input logic is fixed as active Low The AUX Output Port can be set execute a single output function If the port type for an AUX Ports 1 6 is set for AUX Output it will also appear AUX Output window for function programming The output logic of AUX Output can be set as either active High or active Low by the Logic Type function Active High outputs a High 5V when the pro grammed con
97. elch On Off The receiver s squelch toggles between muted and unmuted Squelch Momentary The Squelch momentarily unmutes Take Over On Off Toggles between disabling and enabling remote wireline control Test Tone Off The Test Tone is inhibited Test Tone On The Test Tone is enabled Test Tone On Off Toggles between enabling and inhibiting the Test Tone TOT Disable The Time Out Timer is disabled TOT Enable The Time Out Timer is enabled TOT Disable Enable The Time Out Timer is toggled between disabled and enabled TX Disable The transmitter is inhibited TX Enable The transmitter is enabled normal TX Disable Enable Toggles between transmitter inhibited and transmitter enabled normal The following Programmable Functions are output functions used to tell the condition of the TKR 750 to an external device The output functions can be assigned to only AUX Outputs as follows Programmable Function Description COR Carrier Operate Relay his function becomes valid if an RF carrier is present TOR Tone Operate Relay his function becomes valid if an RF carrier and the specified OT DOT are present RX Unlock his alarm function becomes valid if the RX PLL circuitry becomes unlocked TX Unlock his alarm function becomes valid if the TX PLL circuitry become unlocked Power Supply Lower Limit hi
98. ernal monitor switch input RS 232C input signal for FPU No connection Auxiliary inpu ectab No connection No connection No connection No connection Prescaler RF signal input Common 5V input Lock detector for RX PLL Enable input for RX PLL Data input for PLL Clock input for PLL Reference frequency signal input Ground Switching signal input for RX VCO 8V input through the ripple filter RX PLL lock voltage 9V input through the ripple filter No connection CN605 Internal speaker AF output Internal speaker ground CN606 To ACC 25 pin D sub connector Q N FIN gt No connection No connection Speaker mute signal input Programable 6 RX signal ground Programable 1 0 5 RX audio output voice Programable O 4 Connector No Terminal No RX VCO output Ground Terminal function CN300 Prescaler RF signal input Common 5V input Lock detector for TX PLL Enable input for TX PLL Data input for PLL 49 TKR 750 Connector Terminal Terminal No No Name TERMINAL FUNGTION Terminal function Terminal No Terminal Name Terminal function CP Clock input for PLL Reference frequency signal input Ground Switching signal input for TX VCO SV input through the ripple filter RX PLL lock voltage 9V input through the ripple filter Modulation signal input
99. fied by IC619 B 2 to a sufficient level anti aliasing filtered by IC619 A 2 The audio signal goes to an electronic volume 615 V3 VA to the input of multiplexer IC 622 is amplified to drive a loudspeaker by an au dio power amplifier IC629 The 4W audio output can be provided to external 4 ohms speaker through the 15 pin test connector SPO SPG on the rear panel 2 5 Squelch Circuit The output signal from IC9 enters FM IC again then passed through a band pass filter The noise component output from IC9 is amplified by Q7 and rectified by D5 to produce a DC Voltage corresponding to the noise level The DC voltage is sent to the analog port of the CPU 12604 IC9 outputs a DC voltage RSSI corresponding to the in put of the IF amplifier Display unit X54 B 2 Display unit X54 A 2 3 Transmitter Circuit The transmitter circuit consists of the following circuits 3 1 microphone circuit 3 2 modulation level adjustment cir cuit 3 3 driver and final power amplifier circuit and 3 4 auto matic power control circuit 3 1 Microphone Circuit The signal from the microphone is passed through AGC circuit located in display unit X54 333 so that it does not saturate This circuit consists of IC501 D501 D502 Q501 and Q502 The AGC is operated by controlling the and side levels of amplitude using the current obtained by posi tive and negative detection of the amplified audio signal The a
100. generates power to operate the CPU DSP flash ROM bi directional buffer and base band circuit This circuit consists of 624 625 626 627 IC628 and IC630 6 DC Power Supply Circuit 6 1 DC Source Switching Relay Circuit 1 The final unit contains a relay K1 for switching between the Main DC and Backup Battery If an external power source is connected to the Main DC terminal the Backup terminal is isolated by the relay If the Main DC turns OFF due to power failure it is Switched to the Backup terminal by the relay The CPU monitors which is used Main DC or Backup Battery 2 Trickle charge circuit If both Main DC and Backup Battery are connected trickle charging of 0 5 A max can be performed from the Main DC power supply to the Battery The default is OFF See the Modification section for in formation on the modification method The battery is charged from the Main DC with D8 D9 and R61 If it exceeds 0 5 A the charging circuit is turned OFF by D9 Backup battery Fig 9 DC source switching relay circuit 6 2 SB Switching Relay Circuit 1 SB Switched B is supplied through the relay K1 in the TX RX unit A 2 When 5507 DC source switch in the display unit is turned ON the relay K1 is turned ON to output SB 2 If B exceeds 18V the relay is forcibly turned OFF by D12 and Q25 to interrupt the power and protect the main unit K1 Y Display unit S507 Front panel Fig 10
101. ing the extracting tool Removing the jumper lead Fig 4 2 1 Insert the extracting tool 11 03 0002 into the con nector while pushing the jumper lead in the direction of a 2 Push the extracting tool into collapse the barbs of the crimp terminal 3 Pull out the lead while continuing to push the extract ing tool in the direction b 3 Reinsert the terminal with the black and white stripe lead into hole number 12 and the terminal with the black lead into hole number 6 Fig 4 3 4 Attach the connector to the external speaker connector on the radio Note Relationship between TEST SPKR connector 15 pin connection and speaker output When pins 9 and 12 are shorted Built in internal speaker is used When pins 9 and 12 are open and output is from pins 6 and 12 KES 4 is used Square type plug lt D E31 3228 05 Accessory Fig 4 1 A b Extracting tool 11 03 0002 lt Jumper lead 12 IE z Black lead Crimp terminal Black White lead E23 0613 05 Fig 4 3 TKR 750 MODIFICATION 1 Modification for Sinking the Collector Current Up 2 DC Source Switch Auxiliary output 1 and 2 can each be modified to sink up To prevent the power supply from turning off due to 600mA of the collector current The following modification misoperation of the DC source switch on the front panel or should be installed when Auxiliary output 1 or 2 is used to accidents tampering after installation the main
102. j 50W Shipping power PC adj 25W Shipping power Connect the TG to RX ANT then connect CN1 to the spectrum analyzer input Spectrum analyzer setting Span 50MHz Scale 10dB to 5dB div Tracking generator setting Output 30dBm 1 Connect the TG to CN2 then connect CN4 to the spectrum analyzer input CH 2 Wide Spectrum analyzer setting Span 50kHz to 25kHz Scale 10dB to 2dB div Center freq 44 850MHz Tracking generator setting Output 30dBm Narrow 2 CH 2 Narrow Tracking generator Spectrum analyzer 17 Discrimi nator 1 Connect the SSG to RX ANT CH 2 Wide SSG output 53dBm 501uV SSG MOD 1kHz SSG DEV 3kHz AF 2 40 SSG AF VM Distortion meter RX ANT TEST SPKR jack SPO pin 12 Center the frequency you are using then adjust it to look like the wave Fig 1 Page 46 Adjust it to look like the wave Fig 2 Page 46 Adjust it to look like the wave Fig 3 Page 46 Adjust the distortion to minimum 18 Threshold squelch Wide 1 Connect SSG to RX ANT CH 2 Wide SSG output 3dB below to 12dB SINAD level SSG MOD 1kHz SSG DEV 3kHz AF 2V 4Q 2 SSG OFF SSG Audio analyzer VTVM Oscilloscope RX ANT TEST SPKR jack SPO pin 12 PC adj Adjust to point of opening squelch Squelch must be closed Item Condition ADJUSTMENT
103. l Time function The Revert channel types are Last Called Last Used Selected Selected TalkBack Pri ority and Priority TalkBack 1 Last Called The TKR 750 reverts to the channel upon which a call was last received even if scanning has re sumed power on default selected channel Last Used with TalkBack The TKR 750 reverts to the channel that was last transmitted on power on default selected channel However if a call is received on a channel other than the last transmit channel and PTT is pressed before scanning resumes the transceiver talks back on the current receive channel Selected The transceiver reverts to the channel set by the function prior to scan initiation Selected TalkBack The TKR 750 reverts to the channel set by the Channel functions or Channel Select func tion prior to scan initiation However if a call is received on a channel other than the selected channel and PTT is pressed before scanning resumes the transceiver talks back on the current receive channel Priority The TKR 750 always reverts to the Priority chan nel E TKR 750 10 OPERATING FEATURES 6 Priority TalkBack The TKR 750 always reverts to the Priority channel However if a call is received on a chan nel other than the Priority channel and PTT is pressed before scanning resumes the transceiver talks back on the current receive channel 9 CW ID and Message The TKR 7
104. n Serial data output Power switch input Strobe data for shift register Clock data output Output enable for shift register PTT input TXD output EY input 1 Hook detection input RXD input EY input 2 EY input 3 EY output 4 EY output 5 Volume control input for AF signal Common 5V output ic ground IC signal input IC signal input IC signal output RX audio signal input Audio control signal output Scramble code ou Scramble code ou Scramble code ou Scramble code ou PTT signal input Clear code for scramble RX audio signal output PTT signal output Common 5V output Ground Common 8V input Common 8V input No connection Power supply input after power switch Power supply input after power switch Power supply input after power switch Power supply input after power switch No connection No connection Ground Ground Modulation signal output for VCO Modulation signal output for VCXO Connector No Terminal No Terminal Name TERMINAL FUNCTION Terminal function Terminal No Terminal 1 TKR 750 Terminal function 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 GND SOE TEMP PSW BUP LD2 FWD STB4 oO OU Or HO FRO Ground Output enable for shift register High temperature detector signal input Power switch output Backup signal inpu
105. nection between the TKR 750 and the per sonal computer and make sure that the TKR 750 is in the program mode 6 Press write button in the window A window opens on the display to indicate progress of writing 7 If writing ends successfully the TX LED on the TKR 750 lights 8 If you want to continue programming other TKR 750s repeat steps 3 to 6 Notes This mode cannot entered if the firmware program mode is set to disable in the programming software KPG 66D 4 4 Function If you press the PF1 key front panel both decimal point on the 7 segment display will disappear The writing speed is 38400 bps low speed mode If you press the PF1 key again the right hand decimal points will light The writing speed is 57600 bps middle speed mode Note Normally write in the high speed mode 115200 bps TKR 750 INSTALLATION 1 External Power Supply Connection TX RX unit B 2 control section Rear Connectors See Page 3 Component side This unit has two external power supply connectors Main DC and Backup If an external DC power supply is connected to the main DC connector and a backup battery is connected to the Backup connector at the same time the DC power supply switches to the battery automatically if power failure occurs
106. nnel Up CW ID On CW Message 1 8 On Display Off he channel increments by one he CW ID is transmitted he CW Message 1 to 8 is transmitted respectively panel LEDs are turned off except the Power LED Display On panel LEDs become active as normal status indicators on the repeater A A A A A A Channel 1 16 Directly select Channel 1 to 16 respectively 7 T T T A A A Display On Off panel LEDs with the exception of the Power LED are toggled between off and their normal status on the repeater Hold Time Enable The Parameter of Repeat Hold Time is enabled Hold Time Disable The Parameter of Repeat Hold Time is disabled Hold Time Disable Enable Parameter of Repeat Hold Time is toggled between disabled and enabled Local Tx Disable The local mic s PTT is disabled Local Tx Enable he local mic s PTT is enabled Local Tx Disable Enable ocal mic s PTT is toggled between disabled and enabled Monitor Off DQT decoder is disabled Monitor On DQT decoder is enabled itor On Off DOT decoder is toggled between disabled and enabled itor Momentary DOT decoder is momentarily disabled i Table Sub Table No Select Signalling changes to the Multi Table Sub i Table in Multi Table No Select Signalling changes to the Multi Table Main i Table in Sub Multi Table No Select Signalling change
107. nsitivity Frequency Counter Frequency Range Frequency Stability 10Hz to 600MHz 0 2ppm or less Ammeter 13A or more 8 AF Volt Me AF VTVM Frequency Range Voltage Range 50Hz to 10kHz 3mV to 3V Audio Generator AG Frequency Range Output 50Hz to 5kHz to 1V Distortion Meter Capability Input Level 396 or less at 1kHz 50mV to 10Vrms Voltmeter Measuring Range Input Impedance 10 to 1 5V DC or less 50kQ V or greater 40 Dummy Load The following parts are required for adjustment Test cable for local microphone NC B GND Approx 40 SW e The following test cables are recommended Plug cord Part No E30 3360 08 PTT TXD1 PC serial data from radio MIC GND MIC HOOK RXD1 PC serial data to radio NC 0 MIC connector Front panel view PTT SW Test Channel Default 9 Test cable for microphone input To connect the TX RX unit A 2 CN14 to the TX RX unit B 2 CN602 while in servicing you can use the 36 pin flat cable E37 0979 05 which is available from the KENWOOD parts center om A 00 N Flat cable 36 pin about 256mm ADJUSTMENT TKR 750 Measurement Adjustment It Conditi S
108. nt side Address Ref No 11 8K Pattern 1 7 Pattern 2 9E Pattern 3 Pattern 4 10H 106 Foil side 12 6 Connect 1 and 4 5M A B C D E F G H l K L M N R S PC BOARD VIEW ITKR 50 TX RX UNIT 57 6260 2 10 11 K2 Component side view J 72 0757 01 2 Bites 2 CN19 Alka E BEIGE Pee 25 3 GND2 e GND1 4 STT FIN P102 X CV 8CL 5E C137 EV LDT E MO DP 5 CP C139 REF m m ae Y Fi EN R32 6 CN15 C60 El R30 IN C51 1 20 RAe Qs 24549 z ER 9 Eu A G E dE x D1 2 20 64 BB XF1 Sa 7 CF1 62 2196 BG 9 gt WIDE 63 5 Rig R112 XF2 8122 CJ l C48 Lu IDE GND2 8 st og GND1 Tpidi SRR FIN RX SRR STI SOE 5C 8CR 8CL BC A3 RX VCO X58 478 e e Ge Te O cv 3 m E DT CKOOOSTB4 3 Te n 10 E Es a Ol st IS 1 SCR b258E8S58 S E 5138 e gt a wn 9 SB sm m aaa OO E 885 Le Addre
109. o the varactor diodes CO unit X58 478 TX RX unit SSS SSS SE e 1 A A a a a a a a a a a o O Fig 5 Receiver PLL 4 2 Transmitter PLL The transmitter PLL circuit is located in VCO unit A2 X58 479 on TX RX unit X57 626 A 2 and consists of VCXO X3 VCO s 0350 and 0351 a single chip PLL IC300 buffer amplifier 0355 and high frequency amplifier 0302 The VCXO generates 16 8MHz The frequency stability is within 2 0ppm Temperature range of 30 to 60 C The frequency tuning and modulation of the VCXO are done to apply a voltage to pin 1 of the VCXO The output of the VCXO is applied to pin 8 of the PLL IC through the pin 15 of the VCO The VCO oscillator frequency is 136 00 to 174 00MHz Two VCOs cover the two bands 0350 covers the lower band and 0351 VCO covers the upper band The oscillator frequency is controlled by applying the VCO control voltage obtained from the phase comparator to the varactor diodes 4 3 Unlock Detector Circuit If a pulse signal appears at the LD pin of IC300 an unlock condition occurs causing the voltage applied to the pin of the microprocessor to go low The names of this pin are LDT for TX PLL and LDR for RX PLL When the micropro cessor detects this condition the transmitter is disabled TX RX unit CO unit X58 479
110. ogramming Use to read and write frequency data and mode other features to and from the repeater PC test mode Use to check the repeater using the PC This feature is included in the FPU Firmware pro Use when changing the firmware program gramming mode of the flash memory 2 How to Enter Each Mode User mode Power on PC mode Firmware Pro Received commands from PC PF1 key Power on one second gramming mode 3 PC Mode 3 1 Preface The TKR 750 repeater is programmed by using a personal computer programming interface and KPG 66D software 3 2 Connection Procedure 1 Connect the TKR 750 to the personal computer with the interface cable 2 When power is applied the user mode is entered imme diately When the PC sends a command the repeater enters the PC mode and displays PC on the 7 segment LED When data is being transmitted to the PC from the repeater the TX LED flashes The BUSY LED flashes when data from the PC is being received by the repeater Note The data stored in the personal computer must match the model type when it is written into the flash memory e Change the TKR 750 to PC mode then attach the inter face cable 11 TKR 750 12 REALIGNMENT 3 3 KPG 46 Description PC Programming Inter face Cable Option The KPG 46 is required to interface the TKR 750 to the computer It has a circuit in its D sub connector 25 pin case that
111. ontrol Circuit and Transmitter The automatic power control APC circuit stabilizes the FAN lene transmitter output power at a pre determined level and con sists of forward reflected power detector circuits and switching transistor O8 The forward reflected power de tector circuits detects forward RF power and reflected RF power to DC voltage and consists of a CM coupling type detection circuit formed by a strip line RF detector D4 D5 and DC amplifier IC1 A 2 The voltage comparator IC1 B 2 compares the above detected voltage with a reference voltage set using the mi croprocessor and IC6 located in the TX RX unit An APC voltage proportional to the difference between the sensed voltage and the reference voltage appears at the output of IC1 This output voltage controls the gate voltage for the drive amplifier O4 and final amplifier Q5 which keeps the transmitter output power constant X57 B 2 6 VIH OUT ro O TK11050M Fan operation 3 5 Fan Action Control Circuit If fan action is set to Temperature the cooling fan is turned ON or OFF according to temperature OFF If the ambient temperature of the final unit exceeds i approx 40 C the output from pin 6 of the temperature de 20 C 30 C 40 50 tection 1 2 changes from L to This signal is sent to the CPU 604 by 0602 in the TX
112. pecificati R k Te UA Unit Terminal Unit Parts Method pecMcations Remarks 1 Setting amp 1 Connect the unit to a suitable DC power supply Firmware 2 Turn the DC source switch on after connecting a PC and FPU cable to the radio appears on LED display writing 3 Write the firmware to radio After the end of firmware writing Red TX LED lights up 2 Write test 1 Connect the unit to a suitable DC power supply frequency 2 Turn the DC source switch on after connecting PC and FPU cable to the radio E1 appears on LED display 3 Write the test frequency to the radio Green BUSY LED lights up 4 End of test frequency writing 3 Setting 1 Connect the unit to a suitable DC power supply 2 Turn the power switch on after connecting a PC and FPU cable to the radio 3 Start up the program for the adjustment 4 RX PLL lock 1 RX VCO A high DVM TX RX RX CV RX VCO TC350 1 50V 0 1V voltage CH 11 KE A 2 A3 CH 10 K2 2 RX VCO A low Check 8V or less CH 10 KE CH 1 K2 3 RX VCO B high RX VCO TC351 1 50V 0 1V CH 3 K E A3 CH 12 K2 4 RX VCO B low Check 8V or less CH 12 KE CH 11 K2 5 TX PLL lock 1 TX VCO A high TX CV TX VCO TC350 1 50V 0 1V voltage CH 11 KE A2 CH 10 K2 2 TX VCO A low Check 8V or less CH 10 KE CH 1 K2 3 TX VCO B high TX VCO TC351 1 50V 0 1V CH 3 KE A2 12 K2 4 TXVCO B low Check 8V or less 12 KE 11 K2 6 RX 1 Connect
113. played while in PC mode Lr JU LL PG is displayed while in firmware programming mode 2 decimal points displayed 115 200bps 1 decimal point displayed 57 600bps No decimal 38 400bps Ur or s N 1 is displayed when FPU data is not written mi j J e 22 is displayed when the channel data is not written EC e E3 is displayed when PLL is unlocked Receiver PLL unlocked flashing BUSY LED Transmitter PLL unlocked flashing TX LED L J Vo la m Li EA is displayed when PTT is attempted on a channel number that has no frequency data programmed Vu TKR 750 OPERATING FEATURES 3 Programmable Functions TKR 750 contains many Programmable Functions tabled below Programmable Function Description UX Out 1 5 Off UX I O 1 6 Off UX Out 1 5 On UX 1 6 On UX Out 1 5 On Off UX I O 1 6 On Off UX Out 1 to 5 ports become deactivated respectively UX I O 1 to 6 ports become deactivated respectively UX Out 1 to 5 ports become activated respectively UX I O 1 to 6 ports become activated respectively UX Out 1 to 5 ports are toggled between its active and inactive states respectively A A A A A A UX I O 1 to 6 ports toggled between its active and inactive states respectively Channel Down he channel decrements by one Cha
114. s alarm function becomes valid if the DC power supply voltage becomes less than the preset point he preset point is selected in the range of 10 6V to 13 6V TXS TX Sense This function becomes valid when the transmitter is keyed Selectable AUX Outputs which are set up as Selectable appear in the available Function List for the AUX Input Functions and Key Assignment This allows AUX Inputs and PF Keys to be used to control AUX Outputs RX Signal Detect This function becomes valid if the RX signal level becomes less than the preset point The preset point is selected in the range of 120dBm to 95dBm RF Power Down Detect This alarm function becomes valid if the RF Power becomes less than about 10W Fan Status This alarm function becomes valid when the Fan is turned on either by sensing a high temperature condition or by its operating mode being set to Continuous OPERATING FEATURES 4 Trigger Assignment TKR 750 The Programmable Functions described above can be assigned to PF keys AUX input Save on off Start up and Power supply according to following table In the last column of the table when the Programmable Functions is assigned to any PF keys it expresses that the LED in the PF key turns on either conditions Yes expresses that the trigger is available the Programmable Function No expresses that the trigger is not availabale the Programmable Function Trigger
115. s between Multi Table Sub and Multi Table Main Dec Disable Disables the QT DOT decode operation Dec Enables the OT DOT decode operation Dec Disable Enable Toggles between disabling and enabling the OT DOT decode operation Enc Disable Disables the QT DOT encode operation Enc Enable Enables the OT DOT encode operation Enc Disable Enable Toggles between disabling and enabling the OT DOT encode operation Repeat Disable Disables repeater operation Repeat Enable Enables repeater operation Repeat Disable Enable Toggles between disabling and enabling repeater operation Reset Resets to default condition set up by FPU DC Power Save Off Activates DC Power Save Mode Off DC Power Save On Activates DC Power Save Mode On DC Power Save On Off Toggles between DC Power Save Mode On and Off TKR 750 Programmable Function OPERATING FEATURES Description Scan Off Inhibits scanning Scan On Starts scanning Scan On Off Scanning is toggled between being enabled or inhibited Scrambler Off Disables an installed optional voice scrambler board Scrambler On Enables an installed optional voice scrambler board Scrambler On Off Toggles between enabling and disabling an installed optional voice scrambler board Squelch Off The Squelch unmutes Squelch On The Squelch mutes Squ
116. smits the Primary encode OT DOT TKR 750 OPERATING FEATURES Current When any PTT as described above is active while the repeater is in use or the duplex base station is re ceiving the paired encode associated with re ceiving OT DOT is transmitted When any PTT is active while the repeater or the duplex base station is in idle pe riod the Primary encode OT DOT is transmitted Primary When any PTT provided that the Priority of any PTT is higher than the Priority of Repeat PTT is active while the repeater is in use the encode changes paired encode OT DOT to Primary while continuing to transmit When any PTT is active while the repeater is in idle period the Primary encode OT DOT is transmitted In the base station the Primary encode QT DOT is always transmitted regardless of the receiver status 7 3 OT Reverse Burst Time During repeat with OT tones the repeater re transmits a phase shifted burst of the OT tone reverse burst when it detects the radio using the repeater has un keyed and also sent a reverse QT burst squelch tail elimination This mutes a receiving radio s speaker audio before its receiver circuit shuts off causing squelch tail noise in the speaker audio The TKR 750 can select the time between 140 to 200 ms that the OT reverse burst is sent Typically this time should not have to be adjusted from the default value The transmission of the OT reverse burst c
117. ss Ref Address Ref No Address Component side 10 Pattern 1 71 Pattern 2 7E Pattern 3 Pattern 4 Foil side 65 66 SESE 5 rias ME TL M ee E GND1 T i 6 na T OLEA r1 t3 B 3l HE H 00 P 9 E J ie MUI pica e w om 05 E 02 x 46 qo Di2 oR ics 70 Q9 amp 106 05 uo 7 a ais 55 95 ov s x a Se d 2 _ mamma E ES AE B PUTT Lime gt enl h y Seg y 000 15 i 4 a e os o o4 5 017 ig 025 07 9 er na fen s E IE IE SESE EE ics 7E ico 7 020 2N NNN Y KAK dhadhadh Component side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Foil side Connect 1 and 4
118. t Latch data output for DA converter RF power down signal input Strobe output for shift register Clock output Data output or TX PLL or RX PLL or TX PLL Enable output for RX PLL Clock output for PLL Data output for PLL No connec RSSI signa Squelch signal input Lock detector Lock detector Enable output ion input Ground No connection Detection signal input No connection CN603 To ACC 15 pin connector Power supply output after power switch Power supply output after power switch Ground Ground CN604 To ACC 15 pin connector o O Q N 00D 00000006 FPU Auxi FPU Auxi FPU External speaker output Exte Auxi Auxiliary output 5 se iary output 4 se iary output 3 se nal speaker output FPU FPU Internal speaker input RSSI signal output RX data output Exte Exte iary output 2 se Auxiliary output 1 se nal speaker ground nal speaker ground o NOU U N NR N N NR N N O O GQ N RX data ou Programable put voice amp data O3 TX audio input voice O 2 TX data input data or signaling O 1 ol line ground Programable Programable Con TX signal ground Auxiliary input 3 FPU ectab No connection Auxiliary input 2 FPU selectab Squelch control output 1 FPU External press to talk switch in RS 232C output signal for FPU Ext
119. the frequency f counter CN3 PC adj 50Hz or less frequency counter to CN3 then Test CH 44 85MHz measure the frequency CH 2 Note RX frequency means the local frequency of the RX VCO So its frequency is wanted frequency plus the IF frequency 7 RX 1 High CH Automatically f counter TX RX CN3 PC adj frequency A 2 218 8475MHz tune 2 Low CH Automatically PC adj 180 8525MHz 8 Setting 1 Remove 8 pin cable and the coaxial cable from CN16 and CN19 on TX RX side 9 TX 1 Connect the frequency f counter TX RX CN19 PC adj 50Hz or less frequency counter to CN19 then A 2 measure the frequency CH 2 41 TKR 750 Item Condition ADJUSTMENT Measurement Adjustment Test equipment Unit Terminal Parts Method Specifications Remarks 10 TX frequency tune 1 High CH Automatically 2 Low CH Automatically f counter TX RX A 2 CN19 PC adj 173 9975MHz PC adj 136 0025MHz 11 Setting 1 Insert 8 pin cable and the coaxial cable to CN16 and CN19 on TX RX side 12 Maximum power limitting 1 Measure the RF power at X ANT High CH 13 TX RF high power 1 Measure the RF power at X ANT Low CH Center CH High CH 14 TX RF low power Measure the power level at TX ANT Low CH Center CH High CH Power meter Rear TX ANT Final VRI Adjust the RF power 53W PC ad
120. udio signal goes to control section of TX RX unit X57 626 B 2 from display unit X54 333 The transmit audio signal goes to the input of the multi plexer IC IC605 for microphone muting The audio signal is amplified by IC610 input to the AINL terminal of CODEC IC IC614 and audio processed by DSP IC618 The pro cessed audio signal from the AOUTL terminal of IC614 is amplified by IC616 B 2 to a sufficient level anti aliasing fil tered by IC616 A 2 and amplified by the summing ampli fier IC611 A 2 3 2 Modulation Level Adjustment Circuit The output of the summing amplifier IC611 A 2 is passed to an electronic volume IC615 for maximum devia tion adjustment before being applied to a varactor diode in the voltage controlled oscillator VCO A2 located in TX RX unit X57 626 A 2 IC616 IC616 IC611 B 2 A 2 A 2 MO MB Fig 2 Microphone circuit TKR 750 CIRCUIT DESCRIPTION 3 3 Driver and Final Power Amplifier Circuit The transmit signal is generated by the TX VCO A2 amplified by Q11 and sent to final unit X45 362 This am plified signal is amplified by O2 O3 and Q4 and is passed to the FINAL stage The RF power amplifier consists of MOS FET TX RX unit X57 626 A 2 Final unit X45 362 A 2 cnm ee ar PS arent pee ars ae O TX ANT Q2 Q4 Q5 Drive AMP Drive AMP Final AMP Fig 3 Driver and final power amplifier circuit 3 4 Automatic Power C
121. unit can be control external equipment kept on regardless of the on off of the DC source switch on 1 Remove D625 R755 and R769 for Auxiliary output 1 the front panel D624 R756 and R770 for Auxiliary output 2 on the Short the PSW land near K1 relay by soldering component side of the control section for TX RX unit PCB 2 Install 50608 50612 R761 for Auxiliary output 1 Q607 0611 and R759 for Auxiliary output 2 on the component side of the control section for TX RX unit PCB 0607 50608 50611 50612 DTD114EKA LE 2 ponent side R759 R761 3 9kQ RK73GB1J392J chip resistor 3 Change R801 for Auxiliary output 1 R797 for Auxiliary output 2 from 1kQ RK73GB1J102J to OQ R92 1252 05 By making this modification Auxiliary output I and 2 can now sink up to 600mA each CF1 CF2 WIDE NARROW TX RX unit B 2 op Component side 602 8756 R770 soso 5091 cheos 1C623 R759 R769 8755 8769 49 4 681 0608 0612 Fig 1 Add R761 R759 3 9kQ Remove Z D625 D624 DA204U Add 0608 Add 0612 0607 0611 Shift DTD114EKA DTD114EKA

Download Pdf Manuals

Related Search

Related Contents

balai motorise NS130  Kambrook KFP95 Food Processor User Manual  Hand-Gabelhochhubwagen Electric Stacker-Push Travel  carrocería - carrozzeria  Sunjoy L-GZ224PAL-1 Installation Guide  Samsung SGH-E810 دليل المستخدم  Atmel ATA6264 Power Supply User Manual  HP Z 620  808A User Manual_20130904.ai    

Copyright © All rights reserved. Failed to retrieve file