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SERVICE MANUAL

1. Power meter fal bekt EE 3 BE A Tem e eser m l f E E ZN bw 9 5 5 Mer iud t Orcilloscope Freavenay counter 6 28 2 3 5 a 2 scope Fig 25 Simple Adjustment of Modulation Factor Tone switch In case of W type it s unlock type switch Push to tone switch during the adjustment Rec T type Send W type Connect the test equipment to Fig 27 Connect the oscilloscope of vertical input termi nal through the resistor 1 MQ between RS 470 Q and Q1 Collector Connect the frequency counter to AG and set the AG frequency 1 750 Hz after connect the oscilloscope of horizontal terminal to AG output Adjust VRI until the wave of oscilloscope reads circle Check that Set the AUX switch is at OFF Set the transceiver ready for transmission The lincar The linear detector reads more than 22 5 kHz In case of T type when change to transmitter from Receive Adjust VR2 until take a modulation at 0 7 sec 52 111061 W Type X52 1110 50 T Type var ges e Fig 26 Tone Unit peration Check Unlock function Check that when the Aux switch is at ON unused channel and the channel switch at the center th
2. mio noraca2er02 wan ceramic sor 40 250 CC4SCHIMI00D Ceramic toor 0SpF SEMICONDUCTOR ces CC45CH1H050D Ceramic SpF 0 5pF aua Transistor 256458 8 67 2 Ceramic 10000 10 D1 2 Diode 151565 em ces ccascnimozoc ceramie zor 025pF Diode 151555 wm ceramic 1000pF 210 ceramic 22pF 5 FOTENTIOMETER C71 72 CK45B1H102K Ceramic 1000pF 10 Vm 812240505 Semi fixed resistor SK cus Tantalum asut 10 mraaaoaos Semitized resistor era CK4SBIMIO2K ceramie 1000pF 210 ers 2 Ceramic oOwr 80 20 MISCELLANEOUS c76 CE04W1C100 Electrolytic 16WV 2 Cr7 s2 2 Ceramic 1000pF 10x _ CS15E1C3R3M Tantalum 33uF Ceramic 100opr 10 Ceremic 1000pF RX SYNTHESIZER UNIT X55 1220 61 Sj e Er AX CAPACITOR AOR EC SET 788 ml EE mOTACBzEOOO Carbon 0000 199 22 4 CKASBiMA7IK ceramic 470pF 10 SEMICONDUCTOR cs CCASCHIM1O0D Ceremic 10pF 050F Is 2 7 025 e an 1000 Ceramic 10pF OSpF ER Moe preda
3. olyethylene bag Hook metal 102__ 2 4712 Camon 4700 s waw Cerere SEMICONDUCTOR a5012004 Polyethylene bag Power cord belt battery case dummy otor virozwos orde voss 219 0461 05 Batory case A supplied 102369 MT1 7760 66 gaan had 219 0462 05 Battery case B supplied POTENTIOMETER 419 1310 04 Diode holder x 2 n 401 05 Variable resistor a 4195139204 Bat Riany 2 Maswa SON bomen 320031924 Hook fittings supplied E D 225 2601 04 PC board A for channel SW Vm10237 05440106 Variable resistor sokna SQU METER s 325 2602 04 board B tor G RPT SW 0 n 332023004 Antenna mounting bracket SWITCH 332071804 Antenna holder E 5 529 140205 Rotary switch CHANNEL pero bel dr 52 3 540 2403 05 Push switch 20 kHz CALL 461 0055 05 sa 529 1401 05 Rotary witch RPT 21070813 Knob x 2 VOLUME sau 55 531140205 stige switch LAMP 21 072004 O APT K21 0721 03 knob CHANNEL MISCELLANEOUS K29 0706 04 Knob x 2 PUSH Sw 08 0304 05 Power jack N08 0501 04 Ornamental screw EJ 11 0401 05 Earphone jack N09 0256 05 Screw GND 06 040305 mic 140116 04 Hex bos for 312 m E04 0102 05 M type receptacle N14 0507 04 Mex boss x VR101 102 54 19028204 Washer for 212 A01 072303 Cas
4. SEE vee lef jeje Piip Fio oefe 12 zal 3 6 4 575MH2 the variable capacitor VCO to control its frequency The VCO output is buffer amplified into a transceiver iocal oscillator signal The frequency dividing ratio is fixed at 128 for the AUX channels Thus the local oscillator s crystal oscil lation frequency fo is so determined that an intermediate frequency of 1 60 MHz will be applied to the programable divider Therefore fo will be foc where f is the receiving frequency In the following case the PLL circuit is unlocked and the buffer amplifier Q13 stops operating making it impossible to transmit or receive 1 This position is selected without connecting crystal oscillators to the AUX channels 2 The main knob 40 CH is anywhere between channel positions The PLL circuit has failed SEMICONDUCTOR DATA MC3357 Circuit Description The MC3357 is a low power FM IF circuit designed for in voice communication scanning receivers An input frequency 10 7 MHz to Pin 16 is down to 455 kHz signal by OSC and mixer This signal runs through an external band pass filtering back to Pin 5 for iter amplification The audio is recovered using conventional quadrature FM detector circi noise is heard at this time it means that there are no input signals This noise band is monitor 4
5. 551 19330 Ceramic 33oF 46 as vo3 0355 05 Transistor 2SC1000 GR cc scHiHORSC Cermie ERI 220 Ceramie 2206 25 Es you ces oe Sorin Cia Ceramic 1000pF 10 Cha 2 Ceramic 00146 80 20 0010 w Sw 15 CCASSLIM101J Ceramic 100pF 15 012 03 0271 05 Transistor 25C1345 E Cte CK45F4H1032 Ceramic oOtur 80 20 eu verom rm ga eee coramie 10 Op Er so cia CCAa5SL1H101K Ceramic 100pF 5 ars 05 Transistor 28078410 20 91 0431 05 taverbuirorur 510 pecore M Uinc en Ceramic 120F 5 606471 ME eel ceromie 100p 25 Gu per ite CO92M1H103K Myler 020 03 0241 05 Transistor 2SC735 Y coroazeos Layer buitt0 022uF 10 cos Ceramic 10000 10 psa A Ceramic 0 0146 80 20 Que 227 csiseicanaw Tantalum 23 Q ue csisercanant Tantalum 224F 16WV tr SSO or AA m czs 5 _ tayerbuilt 00496 510 14 PARTS LIST TR 2300 Ref No Parts No
6. 5 KENWOOD SERVICE MANUAL Model TR 2300 2m FM HANDY TRANSCEIVER R 2300 CONTENTS GENERAL CIRCUIT DESCRIPTION 4 8 DATA 24 PARTS ALIGNMENT PRINTED CIRCUIT BOARD n RX SYNTHESIZER UNIT X55 1220 61 ml TX UNIT 56 1280 00 FILTER UNIT X51 1160 00 TONE UNIT X52 1110 61 PARTS LIST PACKING DISASSEMBLY TROUBLE SHOOTING LEVEL DIAGRAM soon pues ADJUSTMENT OPTION ACCESSORY TRICKLE CHARGER 1 NICKEL CADMIUM BATTERY PACK PB 15 HELICAL WHIP ANTENNA RA 1 BLOCK DIAGRAM SCHEMATIC DIAGRAM SPECIFICATIONS e TR 2300 GENERALICIRCUIT DESCRIPTION GENERAL The TR 2300 is an all solid state 144 MHz band handy transceiver for amateur radio stations small in size and thickness and light in weight with a transmitting output power of 1 W The MODE is FM The PLL frequency synthesizer system assures transmission and reception on 80 channels separated 25 kHz apart from one another which may be selected by a combination of the rotary Switch which has 40 positions per turn CIRCUIT DESCRIPTION Units RX SYNTHESIZER unit 56 122061 TX unit X56 1280 00 FILTER unit 51 1160 00 TONE unit X52 1110 61 W type X52 1110 50 T type Both the TX and RX units have many accessory cir cuits and terminals to perform various functions Acc
7. ie wore CARRIER FREQ 145 5 MHz RE POWER 1 25 w 5 SCAN WIDTH 2 MH2 DIV BAND WIDTH 30 kHz 5 SCAN TIME SEC VIDEO FILTER 10kHz H INPUT ATT 2008 LOG REF LEVEL 12 dBm 1048 0IV FREQUECY OWFFERENCE IN Suppression Characteristics Spurious Response TR 2300 PARTS ALIGNMENT Whip antenna S meter LED Knob T90 008205 831 0611 05 11 7260 56 29 0706 04 xexwoos MIC jack Knob Knob Knob 1K21 071813 K210721 03 K21072004 teos 0403 05 Lamp switch Ear phone jack Power jack 5313140205 E11 0401 05 E08 0304 05 Flat head screw Flat head screw N33 3006 45 1N33 3006 41 TR 2300 PARTS ALIGNMENT TR 2300 PRINTED CIRCUIT BOARD RX SYNTHESIZER UNIT 55 1220 61 25C1345 E 28C10001GR 2SA4951Y 25c78410 2sczastv 2ScC 33 v s t 25 25K 19 GR i SM5104GA TOP view oly Lm Lys TO UNIT sv 2 13 35K400L 8 16 17 25 460 8 04 MC3357P 05 25 1000 06 7 25A4951Y Q9 10 15 25 78410 Q11 2sC733lY O12 2SC1345 E Q14 2SK TIGA O Q19 SM5104GA 012 4 5 1N60 D3 9 10 151555 D6 7 8 12 13 152588 011 15516 TR 2300 PRINTED CIRCUIT BOARD TX UNIT 56 1280 00 Fu IMG
8. 30 25A495 Y 250733 25A562 Y 2SC735lY 250458 8 25C784 0 25C460 B 25C1000 GR 3SKA4U L AS 5 kz 1 G uPC78LO0B8 uPC7S8LO05 OUT TA7O0GTAP MC3357P SM5104GA 161514 13 12 11 00 9 TOP VIEW 123545678 SN7ALS73N 14 13 32 11 09 B TOP vIEW 12345657 it B TR 2300 01 2 25C460 B 08 15 25C458 8 Q13 23A562 Y 21 152208 SCHEMATIC DIAGRAM Q3 4 25K18IGH ag TA70G1AP 014 25C496 Y 02 5 7 9 10 151555 05 3SK40 L 010 uPC78LO8 Q16 uPC575C B D3 4 1N60 06 25 2407 Q11 uPC78LO5 06 2 080 Q7 25C2329 012 25C735 Y D8 2 088 Signal line OSC amp Control line B line Adjusting point X56 1280 00 d 02 152588 ac 51 1160 00 03 IN60 INT ANT Et 52 AN on Nee zou 22P 0101 VO6B EXT DC 28 Ref 13 0V 52 Em R23 390 gt BATTERY 0302 CFF 56 149 EXT SP EE C46 4 o R5 47 ce IOFISA TM RSEN 5 ANS i he pP 5 QI gav Gu 23 3 Cia gt PT 4c 22P asf eu H3 335 8 esa lk 5 x o o sod 1 81818181818 E 2 2 L iH 774 A s z n 5 Oner ann E c atte 4 amp 5957 RIT
9. ed by an active filter and a detector squelch trigger circuit s scan control output also shows whether or not there is noise Simultaneously the internal switch operates to cancel the audio output from terminal 9 OSC is an internal bias Colpitts type oscillator whose collector Pin 4 base Pin 1 and emitter Pin 2 connected A crystal is used instead of an ordinary coil The mixer is doubly balanced type for reducing spurious response Pin 16 s input impedance is kept low by an internal bias resistance of 3 and the mixer output is connected to a crystal filter Pin is connected to The signal passes through a band pass filter ceramic or LC to 5stage limiter amplifier circuit Pin 5 and the limiter output from Pin 7 directly drives or externally drives through a quadrature coil the multiplier circuit in circuit in the IC for FM detection The output from Pin 7 is also used for DC feedback to Pin 5 The demodulated audio signal runs through a filter and buffer so that Pin 9 s impedance will be about 400 9 This signal runs via the deemphasis circuit volume control circuit and amplifier circuit to drive the speaker Pin 11 produces a simple inverting OP amplifier output for externally applying DC bias to Pin 10 Internally there is a 2 V bias The filter is composed of extrenal impedance elements for frequency discrimination The audio signal through the filter is fed to an external detect
10. 4 3 RPT switch poor contact 1 09 01 ai 6 detective 2 L15 L16 maladjusted 1 1 O19 defective 2 23 defective 1 018 019 defective 2 Channel switch AUX switch poor contact TR 2300 TROUBLE SHOOTING OTO Gis DE 15 DE In TX unit faulty 1 Replace batteries Recharge batteries if nickel cadmium type Battery voltage Voltage 100 low Adjust external power source to rated voltage Batteries placed Place batteries inthe wrong e in the correct direction direction T Replace con EERS 21012015 D5 DB i heck AVA cum TX unit fauity 2 08 09 in TX unit faulty Nickel cadmium Y 7 2 Faulty battery rae Ne Weng sme connection correctly T ne 2 ien connecter Replace e m 1 Nickel cadmium ox SEED 19 TR 2300 No receiving output TH poor sensitivity mission ok 5 meter does not work Noise cannot be heard Sauelch circuit does not work Distorted F gt Tone Check AF circuit EXPTETT Sound distorted Mw 2 16 in TX unit defect 20 TROUBLE SHOOTING Teter to troubleshooting ep p for trammission reception Cable that itis not disconnected Check antenna connector f
11. Ceramic 100006 10 z E30022005 Power plug with lead wire 3P C _ Ceramic 01 80 20 31 0428 05 Lead wire A for TX filter ca CK45B1H102K Ceramic 1000pF 10 31 0429 05 Lead wire B for whip antenna c9 CK45F1H1032 Ceramic 0 01uF 80 20 Foroszoos Cover SEMICONDUCTOR F20051004 insulating plate x 2 Bt Tete ono F29 040304 Antenna insulating pipe _ 05 oiode 152588 viroosros 1 60 611 0008 08 Cushion for meter 613061404 Cushion for upper case POTENTIOMETER var 812340505 Semi fixed resistor 10K HO1257503 Carton case inside 13 TR 2300 PARTS LIST Rot Paru No Description Ret no Ports No Description Lm co _ 22000F 10 ear exaseinarix Ceramic 47006 10 1 34 0692 05 veeel 32 CK45B1H152K Ceramic 1500pF 10 12 3 134060305 c33 C91 0430 05 Layer built0 047uF 10 ta 134 0680 05 VHF coll c34 CEO4W1C100 Electrolytic 16WV us L34 0499 05 MEE an cas CQ92M1H223K Mylar 0 0224 t10 Cae 2 Ceramic oor 80 20 Ca CEO4WIA470 tlecoiyne 47 F ca coroazoos NO O22 10 TONE UNIT X52 1110 50 T TYPE av 100006 10 X52 1110 61 W TYPE caz
12. current 40 mA DC 40 mA DC 145 V 20 4 V OPTION NICKEL CADMIUM BATTERY PACK PB 15 General This pack holds nickel cadmium dry ceils for Models TR 2300 TR 2200GX The pack consists of a case PB 15A holding 6 nickel cadmium dry cells connected in series and another case PB 15B holding 4 of them in series It can be recharged by the battery charger BC 1 without removing the pack from the transceiver Specifications Nominal voltage Operating time Charging current Charging time Discharge cycle life Operating temperature 12 V 450 mAh 1f PB 15A and PB 15B are com bined 15 72V 450 mAh PB 15B 48V 450mAh Varies with transceiver models See the instruction manual for your transceiver 45 mA Approx 15 hours when charg ed by BC 1 More than 300 times Charge 6 to 45 C Discharge 20 C to 45 C Storage 20 to 45 TR 2300 HELICAL WHIP ANTENNA RA 1 This is a helical whip antenna for Model TR 2300 Specifications Type of antenna Frequency range Impedance Operating temperature Dimensions MA helical antenna 144 to 148 MHz 50 ohms 20 C to 60 C 180 mm tong 10 mm in dia meter 29 TR 2300 BLOCK DIAGRAM A 0082 81 00 0911 19X 831114
13. unit 3 1 i e Hox 107 MHz 455 2408 S N 2408 260mv istor VOLUME 50 LI These voltages are RF valve voltmeter readings when a 40 dB Input is applied from SSG to the ANT terminal Measuring Conditions Test Equipment D c 1 56 MG518A Anritsu nd 2 AG AG 201 Trio C 0 01uF 10 uF 16 V for AF circuit 3 AF valve voltmeter VT 106 Trio 2 14525 MHz A RF valve voltmeter MLG9A Anritsu MOD 1 kHz DEV 5 kHz AG Output 50 mW 8 ohms SYNTHESIZER PLL SECTION 0065v ossy y fel n oof Ju P 7 005v Mores asav NL ue Lars RF voltmeter MLGOA Anritsu 22 TR 2300 LEVEL DIAGRAM TRANSMITTER SECTION osev O72V When TP1 shorted to GND no RF output i edam jr oasv IKHz l L L6 Lmv ii LI ID ai i cie mic Di Ki i5 Hios pL o osav 19 159 055v 17 56 13 MET ee or T x Po pid Am mr 4 nen 1 6 son 1 d meter i 1 M soma 12 Test Equipment and Measuring Conditions 1 145 25 MHz AG AG201 Trio AF valve voltmeter VT 106 Trio RF valve voltmeter ML6DA Anritsu TEST EQUIPMENT REQUIRED 1 RF Valve Voltmeter Input impedance
14. way Red for recharging Black Ground Mor external power supply 13V DC Fig 11 Power Cord Conductors Adjusting Tools 0 2 2 24 When adjusting the trimmers or coils use non induc ed adjusting rod of bakelite or the like This transceiver uses small sized semi fixed variable resistors Use a regular screwdriver of the size which matches the adjusting holes VOLTAGE AND LAMP OPERATION CHECKS Terminal Voltage Check 1 Turn the 4 5 knob to Position 5 2 Set the transceiver ready for reception and check the following terminal voltages o 6V ABVto52V o 7V 7010 76V T8 3 Set the transceiver ready for transmission and check the following terminal voltages and also check that the ON AIR lamp lights T8 271083 V o 5V 481052 V 3 7R Less than 0 5 V Lamp Indication Check 1 Check that the lamp goes out when the lamp switch is at OFF that the Aux indicator lights when the switch is at Aux and that the channel lamp lights when it is at the lamp position Battery Checker Adjustment 1 Turn the squelch knob counterclockwise all the way to the BATT position Adjust the source voltage 1096 V 2 Turn VRS in the TX unit until the S meter pointer is between the red and black zones as shown in Fig 12 O ear D Fig 12 Battery Check 2 PLL CIRCUIT PLL Circuit Adjustment 1 Set the transceiver ready for reception turn the a
15. is obtained Fig 14 RF Unit Adjustment 345 002 15 Sweep Waveform Table 8 Frequency DO AT wien T DO er min sen fied s s E arial LR enses CR rau persi lOpeatia rome ena terminai ECE j 06 15220 vas ooo sano 145909 azaoa z 74771144500 1398007 tas soo Boo 14800 44500 HE 530 142029 134325 14502 1442 2 3 os 444050 raso as oso 134350 vasos 23 56 asso 145 550 aa 860 vs s50 144986 i fiso lisan meon Mie Mene EAR 5 10 144 100 133 400 145 100 134 400 145 100 144 500 25 60 133 900 145 600 134 900 145 600 145 000 e iaia igaz msia naso msia ERG 133890 143 299 134998 108600 148 900 7 s aveo rssaso 134450 as so 144580 27 65 132950 jas eso ax aso 145650 as oso B e 10 132470 145 178 134429 145129 1455 28 122878 145625 134975 1481078 145 07 3 29 144200 1345 45 200 44 900 29 39 raa ooo 1as10 135000 145 106 a azm iaee EEE ERE EEE 25 44 250 12230 734550 an 35 344360 194 050 145 750 iss sn van rn T 145180 GNE E AES EES EEE AE 30 144300 133800 145300 134500 eo 144800 3460
16. 14509 13s 106 vs 300 145300 aa EE JEJE TIE E 15 3s 123650 148 250 134650 15 350 40 750 35 os 444850 134180 ves aso 135180 145360 445250 ie E os ion masaze Ien x 5 E IE SE EE m 144400 133700 145 400 raa 700 145400 144800 37 40 444900 134200 145900 135200 tas 900 148300 H ERJEXSESTEREJETJETIEBBNNE 19 45 144 450 133 750 145 450 134 750 145 450 144 850 39 95 144950 134 250 145 950 135 250 145 950 145 350 144429 13779 145475 547 142499 1342291 145979 135279 142379 145375 Feci AUX 25 TR 2300 2 3 26 ADJUSTMENT IF Circuit Adjustment 1 Disconnect the sweep generator and detector and connect SSG and AF valve voltmeter as shown in Fig 16 2 Turn the 5 RPT knob 10 5 channel knob to Position 00 and set the AUX switch at OFF SG re DC power supply Oscilloscope Fig 16 IF Circuit Adjustment 3 Turn the AF volume control until the AF output noise is about 0 2 V 8 ohms and adjust VR2 and L9 to the maximum noise output 4 Set SSG as follows 145 00 MHz MOD 1 kHz DEV 5 kHz and 30 to 50 dBu Set the receiver in the best receiving condition and turn the AF volume control until the AF output is 0 63 V 8 ohms 5 Adjust SSG attenuation to 40 dBy and increase the AF o
17. 2 cxassiiozk Ceramic 1000 10 us 130020905 FT for 10 7MHz TantumO ar 35wV u 071020105 _ Monothiic filter 10F15A cas ceoawraazoa Electrolytic 47uF te 130020905 for 10 ca Ceramic 1000 10 to 120050305 for DET cso 51 2 Ceramic 001 80 20 Lio 172032205 quartz 10 2498 53 ceoawicioo Etectrotvtie 10ur 16 en 172030905 Ceramic filter CFTASSF2 a ess ceramic OotgF 0 20 ur 130019905 ier tor assmHz css Ceramic 1000pF 10 ua 140190103 Ferinduetor css ceoawiczzia electrolytic 220uF 16WV a ua 133080505 cs ceoawicioo electrolytic voor Lis 022060705 Jose css 2 cerme oowr gt 80 20 L16 17 34068305 Tuning for 1 i fess csiservonim 20 us 134069205 Tuning coil for 130 2 AMP 2 oorsur 10 ue 122060605 056 coi for Jeet ceoawice7aa etectrotysic azur 16 120 La0102103 Feriinduetor mH ces ceramic 23006 210 un 140 339103 perr inductor 3 344 CCE04W1A101O Electrolytic 1004F 10V t22 140102103 dm coa ceoewraazoa etecrroivtic 47uF 10v E 172075205 crystal auars 128 MHz ces
18. CK4SF1H103Z oor 80 20 Top 0 50F CAPACITOR 1 33pF 15 er 2 ceramic 1000pF 310 Cx45F1H1032 Qoru 20 200 tiewolyue 22uF 7 48 a7 Ser Cass estoassos ooozur se o ccasciti270s Ceramic 206 i5 ceoawicazoa tiectoivue 22uF Cao ccascHiMio0D Ceramic 10pF 0pF c7 ceoawinor tictoivuc wr sow Ceramic 001 803 20 Co 10 ckaseini02x ceramie 10006 210 G51 52 1 1 1 Ceramic 100pF 16 Tantalum 15uF tio m Jess Tantalum 2246 1 12 ceramic 1000pr 10 0 ceramice 2758 5x cia esrsetarsor Tantum tsue 10 55 ceramic spr spr ese csrsercanam aaue 16WV RESISTOR c57 90 0246 05 Ceramic QOl1gF 10 mic ADTACB2E000 caen 15 van cse csiseicanmm Tantalum ruf 16WV But ess Ceramic 20 50 mas meta tim six waw gt ccasruimozoc ceramie 292061705 zeka six ceramic Sor 02 ns RNIASK2EA7OSF film 4200 21
19. Ceramic 100pF 5 12 077082105 Crystal quartz 43 3666 RPT 677081905 micas aoracezeoooilcaren 0000 5 xioa 177082005 42 5666 1 vor 01488262222 carbon aaen ss MISCELLANEOUS i2 Capon 1000 s waw 18 0251 05 Crystal socket x 2 223 s AW 23004504 Terminal Square x 6 mas 222 Carbon 2260 15 5 23040105 Terminal Round x 4 TS EICONGUGTOR F01082104 Shield cover for helica a 5 Transistor 25260 8 F11 072a0a Shield case for PLL 03 4 vosooros rer 2sKi9 GR 211072504 Sniei cose for helical s les vosoostos askaot los 0 240706 Transistor 2562407 03 2329 06 25c2320 voa 0093 05 25 TX UNIT 56 1280 00 as 30 0039 05 CAPACITOR vao103016 10x en Heerlen c2 CC4STHIH1000 Ceramic lOpF O SoF ecasuuraozoc Ceramic 208 025oF Bu w cas cotoaszos condemer220pr 10 w eis CcasSLiM2201 ceramic 220 5 aw vmma scan C58 Ceramic oor 80 20 9 wan co Cos2wiMioak mylar Omur 10 Vir cto4wic2200 2zur jan
20. Description marks Ret _ Parts Description Me 09 10 v11 007605 191655 eze 27 1000pF 710 Di vitox405 1516 c28 ceo wicioo Electrotyric 104F 16WV 012 13 vi1 041405 piodo 192588 ca ceooso4os To00pF 1101705 Diode 152208 coo Ceramic Jor 11 041405 Diode 152588 ccascHinoRsc Ceramic OSpF 0 250F Mylar OOP 10 FOTENTIOMETERITRINMER caa CE04W1C100 Electrolytic 16WV var 2 mizaaoros Semitixed resistor 2041 cos ceoososos ceramic tooopr TCi 2 cosooaors Ceramic trimmer 20pF cos Ceramic 10 TC3 6 cosoosros Ceramic trimmer 2SpF cos Ceramic 15pP 5 cosooszos Ceramic trimmer 6pF c37 2 Ceramic 1O00pF 10 76101 102 COS 006705 Ceramic trimmer 25pF co ceoawic220a 2246 Mvlar 10 COIL INDUCTOR IFT CRYSTAL FILTER BOE Er Re ME Ee dd a 134068105 Tuning etectrotytic sowv rey 134068505 vur coi 5 ceoawraaroa etectrotytic 47uF L34068405 VHF ceoawiean7 etectroiytic azur 2547 134068605 VHF 645 ceoawica2a eiectroiyrie 220 169v us 134069705 VHF coi
21. k u 1 rf COK isoon 01 2 25 46018 4 2SK19 GR 05 35 40 1 Q6 25C2407 07 25 2329 4 Q8 15 2SC458 B 09 TA7061AP 010 0 78108 Q1 1 pPC7BLOS 012 25 735 Q13 25A562 Y 014 25 496 Q16 4PC575C2 8 01 152208 02 5 7 9 10 151555 0 RX UN D3 4 1N60 08 2 088 ascraaste Zeaseaty 25 2502929 Ar TER D 7 v 4 z G zero lt In 22 our W TONE UNIT X52 1110 51 T TYPE INT ANT wna soc 88 28 fie 5 ewe MRE e 08 Ean go 3 dec p Sin 4 EXTANT D1 MI301 02 152588 D3 1N6O 12 TR 2300 PARTS LIST TOTAL Symbol New parts Ret No Parts No Description me pars Description Esp CAPACITOR z 257603 Carton case inside W n HO3166704 carton case Outside T CCABSU2H330J Coramie IME H03 1670 04 Carton case Outside W CK4SFiH1O3Z ceramie oor 80 20 reco 45 2 Ceramic 1000pr 510 5104 H10 2507 04 Packing material Plate RESISTOR 25 0079 04 polyethylene bag Microphone E H Polyethylene bag TR 2300 R101 ACOSGF2H330 Sona 230 5 Waw
22. volt age at terminal LT Approx 0 4 Vrms ADJUSTMENT 2 Operation Check 89 1 Unlock function Check that when the Aux switch knob is at ON lunused channel and the channel switch at the center the frequency at terminal LR cannot be measured with the frequency counter S so ds 2 Channel switches Check that when the AUX switch is at OFF amp 5 RPT knob at 4 and the channel knob at Position 4 Qe 00 the frequency at terminal LR is 133 3 MHz Em 100 Hz when the switch is turned to Position 05 vt ul 10 and so on the frequency changes at 25 kHz intervals and when turn the 5 RPT knob at Fig 13 RX Synthesizer Unit 56 1220 61 ON the 25 kHz step can be change frequency from Sweep generator 143 3 MHz Er DC power supply 3 RX UNIT Tes m Detector ot RF Unit Adjustment 1 Set the unit ready for reception and turn the Aux switch is at ON unused channel 2 Connect the sweep generator to the antenna terminal and the detector to 3 Increase the vertical gain of the oscilloscope to the maximum and adjust the sweep generator fre quency and output level so that an appropriate waveform can be obtained 4 Repeatedly adjust TC2 and L1 until a wave form such as shown in Fig 15
23. 1 min 20 pF max Frequency range 300 Hz to 5 kHz Voltage range F S 10 mV to 300 V Output 05 mV to 1 V gt Measuring frequencies 200 MHz min 9 Frequency Counter 2 Power Meter Minimum input sensitivity About 50 mV Impedance 50Q Measuring frequency 150 MHz min Measuring range 2 10 Sweep Generator O Measuring frequencies 150 MHz min o Frenat vande 3 DC Power Supply 144 148 MHz O Voltage Variable from 9 V to 16 V O Measuring output 145 MHz band Current 1A min 11 D 4 Linear Detector 12 SSG 5 Directional Coupler Capable of covering 144 148 MHz 6 Oscilloscope 2 Frequency modulation is possible With horizontal input terminal and high sensitivity 13 DC Voltmeter Input impedance Sufficient O Measuring frequency 50 Hz to 10 kHz 14 Dummy Resistor O Input impedance More than 1 MQ 8 5W approx Voltage range F S 3 mV to 30 V 23 TR 2300 BE ADJUSTMENT FORE ADJUSTMENTS AND REPAIRS If you are making adjustments or repairs for the first time or if you are not familiar with the proper way of handling the transceiver read the instruction manual first before attempting adjustments or repairs It is necessary 10 keep the following in mind Power Cord Conductors The yellow wire of the accessory power cord is posi tive the black one a grounding wire and the red one for recharging Be careful not to connect them in the wrong
24. 100 me E M e 1k k 5 Lol VRIO2 ol SQUELCH E 022 R2T 2 7K R34 33K R32 33yl6V 24V liig R353 33K C38 Lo T oz2 tea 2215 cQ CT2 m 00 01 213 3S5K4O0 L 03 8 6 7 25C460 B Q4 MC3357P Q5 25CIOOO GR 06 7 254495 7 09 05 25078400 QI 250733 7 25 1345 O14 25K 9 GR SNTALST3N QI9 SM5I04GA fone i Ay 33pl6V SE 5 i 4 s w w DI 2 4 5 INGO ilius D3 1151555 1 52 1110 61 DH NSS 2 92 04 152208 o1 2 2SC458 B Jor 151555 TR 2300 Note 3 5 1 Voltage values with parenthesis of Q6 Q7 X52 1280 00 Voltage at driving signal pere 2 Voltage values with parenthesis of Q4 X55 1220 00 Voltage at squelch ON g 3 Voltage values with parenthesis of 011 012 013 X55 1220 00 Voltage at unlock operation W H BI m TR 2300 TR 2300 32 SPECIFICATIONS GENERAL Semiconductors Transistors 22 FET s 7 IC s 7 Diodes 30 Frequency Range 1440 to 146 0 MHz Operating Temperature 20 C to 50 C Standard Operating Voltage DC 130 V Internal 1 nickel cadmi
25. 20292704 18 Antenna earth wg E23 004304 2 Panetmount tiing A212567 03 529240205 rar 3 Ornamental pane A21 0721 0590 NTA DEO 4 82547292411 21 8 831 0611 05 switch mount fitting 121 2565 04 FM toe oet 5 Potentiometer mosaaovos rowen vot 22 Senda S Hee Bee 822250705 24 Diode holder 319 131004 7 Potentiometer 205440105 saueren 24 Dios Hex boss N14 0507 04 abad 245 0401 04 Antenna stopper 132022004 BF baan ant aai DR TONER 30 insulator ring 39 0283 04 S40 2403 09 7 14 Wether 19028204 28 Knob bush 342 0401 04 12 Terminal 23 0097 04 29 23 Hex nue N14 011604 30 Lamp stopper 221251204 14 Rotary switch 529140205 earn Epe 15 Dial stie 819 0602 04 32 Earth 23001504 16 V11 7260 56 Earth tug 23 0015 04 17 49 MIC jack E06 0403 05 17 TR 2300 DISASSEMBLY TROUBLE SHOOTING DT X 9 screw NOI USO T ar roo LN C RN pum or 2 Check AVR voltage to 015 in TX unit detective 1 014 12 Q13 in PLL circuit defective 22 C18 maladjusted 014 015 D14 defective 1 2 TC7 maladiusted 1 08 020 O11 defective 2 C15 L16 maladjusted 3 C24 defective
26. 4010 Terminal Round x 4 31091308 Tuning f40070405 Pin piua 7P ts 134088905 Tuning tor Mix in plug 10 34098805 Tuning cow 3 set n V 34089008 Tuning or F02 0413 08 Heat sink ka Tuning tor Fro1219 08 shield plate to taaosaros vnr con F110726 04 shield cave 16 Operating manual 859 2599 00 wi 2600 00 T Polyethylene baa E 04 Packing materialta ite 3808 01 102507 Fotyernyiene bog A 25 0120 04 em ide 257603 W Carton case inside HO12575 03 T Elton case outside 03 1670 04 w m ease outside HOS 1667 04 T Polyethylene bag D 1825 0079 04 Trickle charger Polyethylene bag 8 1825 0120 04 Accessories Polyethylene bag A H25 0120 04 Power plug with lead wire 620022008 X 1 Shoulgering belt 106 1 0055 05 X 1 Polyethylene bag B 1H25 0120 041 Battery case A 19 0461 09 X 1 Battery case 8 119 0462 05 X 1 Dummy cell WO9 0002 05 X 1 Polyernylene bag C 125 0116 04 Binding screw 136 3006 41 X 2 Phone plug E12 0001 051 X 1 Operating manual 850 2509 00 W 1020 031924 x Y 850 2600 00 T wo9 0004 05 T wos 0005 0s W TR 2300 DISASSEMBLY No Description Parts No Remarks Description Parts No Remarks A
27. TR 2300 DATA suoneoytoads 4 oger 2998 8941 S EI aedes amit 22848941 OL 84 Lal mum LT ars mu sc axe UA HET E suoneagioods 9 orgel aoysisue11 4 6222052 ones mma vre ost Yan SEED 30 WOUDEN TR 2300 DATA FILTER L72 0309 05 Nominal center frequency 455 kHz dB bandwidth More than 5 kHz from 455 kHz 6 dB bandwidth than 27 5 kHz from 455 kHz 60 dB bandwidth Less than 16 kHz from 455 kHz Guaranteed attenuation More than 45 dB at 455 100 kHz More than 30 dB at 0 1 to 1 0 MHz Ripple Less than 3 dB at 455 5 kHz Insertion loss Less than 6 dB Input and output impedance 1 5 CARRIER rat SOMME ANT INPUT LEVEL 2048 zoe siot LLL enn NOTE T T CARRIER FREO 145 5 RF POWER 1 25 W SCAN WIDTH 100 MHziDIV TBAND WIDTH 30 kHz SCAN TIME 2SEC VIDEO FILTER 10 kiz ATT 2068 LOG REF LEVEL 12 dBm 10dB DIV UNDESIRED SIGNAL INPUT IN Af zo 45 6 8 UNDESIRED SIGNAL INPUT LEVEL IN 48 af 200r 40KME Intermodulation Characteristics CARRIER FREQ 145 ANT INPUT LEVELS Ipv LL 2049
28. Turn TC2 to the minimum position and turn VR2 counterclockwise all the way to the minimum posi tion Connect the power meter to the EXT antenna terminal 3 Set the unit ready for transmission connect the RF valve voltmeter to TP1 and adjust L3 and L4 until the meter reads maximum When meter reads has over 0 46 V RMS adjust the RF volt to 0 46 V with 13 Reference voltage at 1 0 35 Vrms 4 Connect the frequency counter to and adjust the frequency to 10 7 MHz 100 Hz with TC1 5 Connect the RF valve voltmeter to TP2 and adjust L5 L6 L7 LB and VR1 repeatedly until the meter reads maximum Reference voltage at TP2 1 5 Vrms TR 2300 ADJUSTMENT 6 Adjust TC2 TC3 and TC4 until the power meter reads maximum Check that the transmitting out put power is more than 1 5 W 7 If current drain exceeds 500 mA reduce the capaci tance of TC3 so that there will be no current drain of more than 500 mA 8 Adjust the transmitting output power to 1 2 W with VR2 DC power supply with ammeter Als Power meter RF voltmeter Fig 19 Transmitter Adjustment 2 RF Meter Adjustment 1 Adjust the filter unit s VRT until the RF meter reads 8 To Eo E RF meter adj EA ce 5 ge 20 Filter Unit 3 Transmitting Freugency Adjustment 1 Readjust so that the transmitting output fre qu
29. cri 13 ceramic 5 1 C14 16 CK451F1H103Z Ceramic O 01yF 80 20 DS CK4581H102K Ceramic 1000pF 10 veru dada KL cia 45 1 0700 Ceramic 7pF 0 5pF Dr nie 45 1 0100 Ceramic 1pF 0 25 58 AZIE c20 CCA5CH1H220J Ceramic 22pF 25 5710 Vo fm c21 estsereanam Tomolum3duF 16WV POTENTIOMETER TRIMMER C22 24 Ceramic 1000or 510 25 CC45CH1H100D Ceramic 10pF 0 5pF ela aided 15 TR 2300 PARTS LIST PACKING mewe Parte Ne Descioton mesmo No Deveription EN vra 12 201505 Semrnxeq n vxo 534050205 VHF coi s Vha 4 12240308 Semified resistor Sk e 0707008 Vas 91240605 resistor SOK tiz 13408905 VHF 34084108 con 008006205 ceramic wimmer or tia 134000305 VHF Tea ceramic vimmer 10 tis taotooros Fertinductor 193 cosoosors ceramic immer 20P Cie t o102103 perriinducior TNGUCTORAFTICRYSTAL r _ Femsinguetor ur L33 0615 05 Choke 154 MISCELLANEOUS 2 L40 1021 03 Ferriinductor 23 0046 04 Terminal Square x 6 t2 tooo 950
30. cuit jA EE No or insufficient Reception Check AVR Transistors Q16 Q13 transmitting output Sireutt voltage Q15 defective ox Adjust immers TC2 ointer esca mo 2 Replace transistors 06 Antenna DZ im Mier diode unit defective Pointe T VAT of iter unit matasjuste Cheek AF meter 2 Br miter unit circuit defective 3 Moter disconnected Check LT Terminar D12 in AX or synthesize voltage p unit defective T Connector poor contact 2 Standby switch poor contact Y Check AVR circuit 2 Diodes 05 06 07 08 detective 1 2 L3 through L7 transistor DC and AF voltage maladjusted Toa maladjusted 1 01 defective 2 Q9 defective 3 VR3 VRA maladjusted poor contact Ne modulation suficient modula Von or distorted modulation Check microphone amplifier modula Replace microphone Resolder connector Microphone cord broken Spread microphone jack pins Poor microphone sensitivity con 21 TR 2300 LEVEL DIAGRAM RECEIVER SECTION 52 10 7882 2668 2408 648 548 1 1248 D S N 2408 S N2408 S N 2408 S N 2408 1 24 Sa 2448 i 1 i os Filter 3
31. e compensation and power stabilizing The output of VCO is converted into an IF signal of 3 60 to 4 575 MHz by the output 129 6999 MHz of the local oscillator in the mixer The local oscillator is a 3rd overtone 43 2333 MHz crystal oscillator whose output is tripled into 129 6999 MHz IF signal is amplified and divided into one half by a pre scaler into a signal of 1 80 to 2 2875 MHz which is then applied to the programable divider C MOS LSI The frequency dividing ratio N of the programable divider is set at somewhere between 144 and 183 Table 1 with the main knob so that its output will always be 12 5 kHz The output of the reference oscillator 12 80 MHz is divided by 1024 by the frequency divider into a 12 5 kHz signal which is applied to the phase comparator where compared with the output of the programable divider The comparator output is applied from a low pass filter to 3 TR 2300 DATA N 144 183 Table 1 Programmable Cord poirien 2 ese es Pronom po m ong on e ve T 1 fot pe hz ES as SERERE mst om af HEJJ a Wee 1214 El
32. e transmitter sends no output power Channel switches Check that when the AUX switch is at OFF 5 RPT knob at 5 and the channel knob at Position Fig 27 Tone Unit Adjustment 00 an output frequency of 145 00 MHz can be obtained when the channel knob is turned to 05 and to 10 the frequency changes at 25 kHz inter vals the frequency rises by 20 kHz 3 Transmitting outputs at 00 and 975 Check that transmitting output power at Position 00 or 975 varies less than 0 2 W from the transmit ting output power at Position 145 00 4 Current drain Check that when a 50 ohm load is connected to the external antenna terminal current drain is less than 450 mA 2300 m 1 cammer rea Las somn went rw I ae e a m T UBI OR 2 OUTPUT Ze ze Ec 3g 6 D 14 16 18 SOURCE VOLTAGE IN V Fig 28 Source Voltage vs Current Drain and Transmitting Output Power OPTION ACCESSORY TRICKLE CHARGER BC 1 General W09 0005 05 W type W09 0004 05 T type This battery charger is designed specially for Models TR 2300 TR 2200GX and can charge the 10 builtin PB 15 UM3 n Specifications Input voltage Power consumption Output current Output voltage el cadmium dry cells in the transceiver AC 200 V 50 60 Hz 3 W max
33. e Rating Unit Tos vpp Vss 0 3 7 0 v Operating voltage Vpp Vss 4 5 5 5 Input voltage VIN VsssViN lt Opening Toer 30 70 Wes 40 125 Pw 250 mW 260 c Soldering time 5 sec Table 3 SM5104GA Program Counter Truth Table N P Ps Ps Pa Ps Py P Po 2 0 0 elejo jolo olo CRYSTAL QUARTZ AUX Channel Type 25 Frequency 1390 Aura t e 3 f desired frequency fo oscillation frequency to be obtained Allowable frequency deviation 20 X 1076 or less at 25 C 10 X 107 or less at 25 Temperature range and allowable deviation 330 X 10 5 20 to 60 C Oscillator circuit and output Fig 9 Oscillator output is more than 0 13 V rms when the following circuit is used as a experiment circuit 33 0605 05 L2 L32 0607 05 2 25C460 Fig 9 OSC Circuit fout xn 514 sHigh tevel 0 lt Low level OO S gt Pu h h A A NS 1 FET u Y Fe po LD Pi ror Fig 7 SM5104GA Pin Arrangement gt CED este cove M5104 G DeeP ez PHASE DETECTOR Vss P P PROGRAMMABLE COUNTER Fig 8 SM5104GA Equivalent Circuit
34. ency will 145 00 MHz 100 Hz DC power supply Shorten whip antenna as much as possible Frequency counter Fig 21 Transmitting Frequency Adjustment 4 A Modulation Factor Adjustment by use of linear detector 1 Connect as shown in Fig 22 and apply a signal of 1kH2 15 mV from AG to the microphone terminal 2 Set the AUX switch at OFF and adjust until the linear detector reads 5 kHz 3 Then adjust the AG output to 1 5 mV and adjust until the linear detector reads 3 5 kHz Directionai 27 coupler 3 Powermeter Audio stor Audio voltmeter Fig 22 Modulation Factor Adjustment Fig 23 Transmitting Frequency Deviatior Characteristics s ero e Check adi MIC GAIN MAX DEV VES TO Fig 24 TX Unit 4B Simple Adjustment of Modulation Factor 1 Connect as shown in Fig 25 2 Apply a signal of 1 kHz 15 mV from AG to the microphone terminal and adjust VR4 until the AF valve voltmeter connected to terminal T reads 0 54 V 3 Adjust the AG output to 1 5 mV and adjust VR3 until the voltage at terminal is 0 35 V Tone Unit Adjustment 1 Set the following switches and knobs as follows O Aux switch unused channel 27 TR 2300 ADJUSTMENTS DATA
35. essory Circuits 1 S RF meter 2 Battery checker 8 Squelch circuit 4 Aux circuit 5 TONE OSC circuit 6 CHANNEL AUX ON AIR Lamp indicator circuit 7 Frequency shift circuit Repeater Accessory Terminals 1 Whip antenna terminal For connecting whip and heli cal antenna provided as accessories 2 External antenna terminal For connecting external antenna 3 MIC terminal For connecting microphone 4 External DC terminal For connecting external power supply or nickel cadmium battery charger 6 External speaker terminal For connecting earphone or external speaker Receiver Circuit Received signals are amplified by RF amplifier Q1 from which the amplified signals are applied to the first mixer Q2 The receiver has two tuning circuits in its antenna circuit and a helical resonator after the RF ampli fier to obtain the required bandwidth This design is effec tive for rejecting undesired out of band waves and cross modulation 2 signal characteristics Examples of sensi tivity suppression and intermodulation characteristics are shown on Page 8 The first oscillator s output signal on the 133 MHz band is applied from the PLL circuit to the first mixer from which the 1st intermediate frequency of 10 7 MHz is taken out The first IF signal runs through MCF to which amplifies it and sends the amplifies signal to Q4 has a limiter circuit 10 245 MHz second oscillator circuit mixer circuit discr
36. ete circuit and a squelch cir cuit built into it See Page 4 Q4 produces an AF signal from its Pin 9 and sends it to Q5 which amplifies it and sends the amplified signal to Q16 TX unit for AF power amplification Part of the second intermediate frequency is fed to 06 and Q7 where it is amplified for operating the S metor An input of about 10 20 dBu is necessary for the meter to indicate 5 8 Transmitter Circuit Audio signals from the MIC terminal are amplified by Q9 to the level required for modulation Q1 is a crystal oscillator circuit which generates a 10 7 MHz signal The audio signals are used for variable reactance direct shift The signal amplified by Q2 is mixed with the 133 MHz band signal from the PLL circuit by the balanced mixer which consists of and 04 into a 144 MHz band signal The signal then passes the band pass filter consisting of L5 L6 and L7 to Q5 and Q6 where it is amplified The amplified signal then goes to Q7 for power amplification Part of the drive output from Q6 is rectified by D3 and D4 whose output is sent to Q8 where it is amplified A stable transmitting output is produced by applying ALC to 05 PLL Circuit Fig 1 shows the basic composition of the PLL circuit The PLL circuit is designed on the basis of the PLL circuit for the TR 7500 but consumes much less power and Occupies much less space VCO assures satisfactory fre quency and output stability by use of FETs temperatur
37. he oscillator output is sent to the reference divider circuit where the input is divided into the required fre quency The divided frequency serves as reference signal fr for the digital type phase detector located downstream The reference divider circuit can be set at a dividing ratio of either 1 1024 or 1 2048 by means of Fs frequency division selecting terminal The comparison signal fi applied to input terminal Fin of the amplifier is amplified and shaped before it is sent to the programable counter where it is converted into fpc by program terminals Po through if Po 1 for example the programable counter produces an output of 1 255 The converted frequency fpc is fed to the phase detector The phase detector compares the phase of this signal with that of the reference signal and produces a pulse length signal in direct proportion to the phase difference between the two signals such as shown in Fig 5 from its output terminal Do Program Om aarda De Dui a D detector Fe prone Vas fose Noe Pal down resistors are setin terminals Pull ap resistor ie in termina Fs Fig 6 SM5104GA Block Diagram _TR 2300 Table 2 SM5104GA Absolute Maximum Ratings DATA nem Cod
38. ing circuit which checks the presence or absence of noise or tone signals on the audio band This output enters Pin 12 The external positive bias input to Pin 12 sets the squelch trigger circuit so that Pin 13 s impedance will low at about 60 Then the aduio mute circuit Pin 14 opens If the voltage of Pin 12 reaches 0 7 V due to noise of the tone detector the voltage of Pin 13 rises to a level 0 5 V below the source voltage applying a load current of DATA about 500 pA Pin 14 is internally grounded Pin 12 has a hysteresis of 100 mV for preventing jitter Audio muting is accomplished by connecting Pin 14 to high impedance reference grounding point in the audio path between Pin 5 and the audio amplifier E nere E aso te Sean Cont Seven mout I Finer inoue Ph tes Fig 4 357 Block Diagram TR 2300 ISM5104GA Circuit Description This product was developed as a C MOS LSI for PLL and consists of an OSC reference oscillator circuit DI VID ER reference frequency divider AMP amplifier circuit PC programable counter and PD phase deteci r as shown in the block diagram A high accuracy crystal oscillator circuit can be formed by adding a crystal resonator and a capacitor between Qin and of the reference oscillator circuit External signals can be applied to Qin at the same time T
39. mp 5 RPT knob 105 and the Aux knob to OFF Turn the channel knob to position 00 2 Check the RF voltage at TP2 turn the L5 core clockwise 180 half quarter turn from the oscilla tion start point Reference voltage level at 2 Approx 0 35 Vrms 3 Connect the RF valve voltmeter to and adjust 116 and L17 repeatedly few times until the meter reads maximum Reference voltage at Approx 0 4 Vrms 4 Connect the DC voltmeter to TPG and adjust the voltage 10 2 0 V with TC7 Aux switch turned ON unused and adjust the voltage at to the maximum with L17 5 Connect the frequency counter to TP and adjust the frequency to 12 79810 MH 10 Hz with 6 Set the AUX switch is at OFF turn the 5 RPT knob to position 47 connect the frequency counter 10 terminal LR and adjust the frequency to 133 3 MHz 100 with TC101 7 Set the AUX switch is at OFF turn the 5 RPT knob to position 5 and adjust the frequency to 134 3 MHz 100 Hz with TC102 8 Set the transceiver ready for transmission turn the D RPT knob to position RPT Connect to frequency counter to terminal LT and adjust the frequency to 133 7 MHz 100 Hz with 0 Connect the power meter to the external antenna terminal set the channel knob at Position 00 set the transceiver ready for transmission connect the RF valve voltmeter to terminal LT and adjust L18 until the meter reads maximum Reference
40. nge without notice due to development in technology A product of TRIO KENWOOD CORPORATION B 17 3 chome Achada Meguro Tokyo 153 Japan TRIS COMMUNIC ATIONS ING TERE KENWOOD COMMUNICATIONS GmbH Taio KENWOOO AUSTRALIAIPTY LTD 1978 10 PRINTED IN JAPAN 851 0855 00 T 400 W
41. o Top AS 19 028304 Insulating ring for 212 01072403 Case Bottom 19 060404 Spacer for cover 20232705 Panel 19 0605 04 Washer for channel knob 21 0721 04 Ornamental panel W N24301 4 E ring x 2 A210720 04 Ornamental panel T A23 1425 03 Rear panel i reuse OMEN 790008205 Antenna 801061203 Escutcheon Right le iben E 801061403 Escutcheon Lett j wos 000205 Dummy battery 05 0706 04 Speaker grill cloth 109000405 Trickle charger T 819060204 Dis sit 0005 05 Trickle charger W ilot lamp Small rene 29051105 Socket pin 031001105 S meter Fore Z pr dil eee a E40076805 Pin socket E 840244204 Name plate T nire paeas 850257600 Operating manual W soes arn T 850260000 Operating manua T 061000 Name plate Caution 84264104 Name plate EXT SP FILTER UNIT 51 1160 00 gt 021080604 share E CAPACITOR 12 0001 05 Phone plug Supplied ceramic 100pF 15 E20048103 46 terminal plate for battery ccasstwia30 Geramic 33pr Lex 23 0015 04 Earth tug x 6 220 ceramic 2205 15 E 22004304 Antenna earth lug x 2 Cs _ ccascuini20 Ceramic 1290F 5 23 009704 Terminal for 212
42. or faulty com Voltagel 1 Replace battery drop Recharge battery If nickel cadmium battery is used Adjust external power sup ply to 13 V Cheek LA terminal volt je detective Check RE MF MIX voltage TC2 LT L6 L8 VR2 maladjusted Check second local oscillator 3 04 deeds 42 oscillator crystal Voltages EN T VAT maladjusted 2 Smeter disconnected 3 0607 defective Does not 1 Transistors 04 05 defective MOLT Check IF and 2 EXT SP lack poor contact stage volt 3 Speaker disconnected Low ane 2 G16 in TX unit detective 6 VR2 maladjusted discriminator PE n maladjusted REL Check second La focal osciliator e cryst froquoncy defective a poor ean RF and IF trimmers end col TR 2300 TROUBLE SHOOTING eter troubleshooting step tor no transmission reception Extend rod antenna fully 2 Check antenna cable that it is not disconnected Check antenna connector for poor contact 3 Replace battery Voltage 2 Recharge battery if nickel drop cadmium battery is used 3 Adjust external power sup ply voltage to 13 V Transistor GB detective Aue cir
43. um Ni Cd cells 10 each 2 UM3 dry cells 9 each Operating Voltage Range DC 9 6 to 16 V Grounding Negative grounding Antenna Impedance inten SOM DC Current at DC 13 0 V 2 Less than 45 mA in receive with no input signal Less than 450 mA in transmit at 1 W 50 ohms load Dimensions 122mm _ 413 16 wide 51mm 2 high 175 mm 67 8 deep Whight Bela afte Approx 1 2 kg 2 64 Ibs with 10 Ni Cd cells TRANSMITTER SECTION Transmitting Frequency 144 MHz band 40 channels 145 MHz band 40 channels AUX 1 channel e wawapa qqh odd FM RF Output Power Modulation Variable reactance direct shift Maximum Frequency Dev 5 kHz Less than 60 dB Less than 50 dB for harmonics Dynamic microphone with PTT switch 500 2 Spurious Radiation Microphone RECEIVER SECTION Receiving Frequency 144 MHz band 40 channels 145 MHz band 40 channels AUX 1 channels Mode FM Circuitry Intermediate Frequencies Double superheterodyne 10 7 MHz 150 IF 455 kHz 2nd IF Receiver Sensitivity 22 22 2 S N more than 30 dB for 1 uV input 20 dB noise quieting less than 0 4 uV Less than 0 25 uV More than 14 kHz at 6 dB down Less than 32 kHz at 60 dB down More than 0 7 W across 8 ohms load 10 distortion Squelch Se Pass Band Width Selectivity Audio Output Note The circuit and ratings may cha
44. utput to the maximum with L9 46 While adjusting SSG attenuation so that the S meter reads 3 to 4 repeatedly adjust L6 18 and VR2 a few times until the S meter reads maximum 7 Adjust SSG attenuation to 6 dBu 0 5 pV and make a fine adjustment of the SSG frequency so that the best waveform and maximum output can be obtained Check at this time that the signal to noise ratio is more than 20 dB NOISE m tu Fig 17 Signal to Noise Ratio and Output Level vs Antenna Input Voltage S Meter ADjustment 1 Adjust SSG attenuation to 30 dBu 30 pV and adjust until the S meter reads close to 10 2 Adjust SSG attenuation to 20 dBu 10 pV and turn VR2 clockwise until the S meter reads 5 8 TI Fig 18 S Meter Operation Characteristics 4 Operation Check 1 Check that 20 dB NQ sensitivity is less than 2 dBu 0 8 pV 2 Check that the signal to noise ratio is more than 40 dB when SSG attenuation is 40 dBp 100 3 Squelch operation check Squelch threshold point Anywhere from 9 to 11 on clock dial Squelch sensitivity Less than 10 dBu 0 3 HV 4 AF output level 5 Current drain More than 24 V 8 ohms 0 7 W O Receive Less than 45 mA 4 TX UNIT 1 Transmitting Output Adjustment 1 Set the following switches and knobs as follows Channel knob 00 Aux switch OFF 5 RPT knob 6 2

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