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Kenwood - TM-742 Service manual

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1. 1 122 2 123 1 124 88 537 10Mf 127 36 10Me a 7 128 5 129 4 533 gt 532 c css 132 31 1 133 30 1 134 529 1Mdp 135 78 1Mg 136 526 138 ud 81 7 t 6 No 3 IC IC LCD SEG LCD Pin No Name Term No 100Kb 100Ke 139 4 S24 Q 100Kc O 100Kdp 22 100Kb 100Kg 47 M 2 1 5 S15 149 514 ike 150 S13 151 512 1Kg 511 co 153 510 MRHf 154 59 MRHe 155 58 LOCK 156 57 MRHg 157 56 158 55 MRLe 159 53 MRLg 2 0 7 3 152 62 1 59 8 7 56 55 gt 4 B 53 161 5 5 gt 48 O O z 49 TM 42 A 742 942 CIRCUIT DESCRIPTION TONE OUTPUT The TONE output is obtained by outputting from CPU the pulse corresponding to the preset tone and by filtering it Figure 41 CN2 INPUT OUTPUT CTCSS OPTION TSU 7 Data to the CTDSS unit is outputted by P80 P47 and Moreover since P80 has also the function of check ing the connection it becomes an input when the power is turned ON and after checking the connection it be comes an output CTCSS does not turn ON when there is no connection Figure 42 shows the data transmission format and
2. SO AB 32949 NUBE 1 MLL isnipy XH XL UE 232 75502 jaueg aow JO 2243 N l eal wen munasi won 3821 juaunsnipy yu uu inse l Ajuanbas 9 ZHIN OOS ZZZ A0uanba y 71 AU 04 ZHY LOW ZHIN 0067222 ASu nb JJ 7 Paz 42849 OG ZH 9 juawysnipe ZHW 0087222 71 5 ZHIN 08672222 4 ZHIA 000027 4 7 ZHI 099222 4 72242 ZHW 086 722 ASu nb lj3 MusugJ ZHN 000222 ASu nbes3 7 215849 lu unsnfpe ltusuejj 7HIW 222 ouenbej unIpayy ZHN 86 Axuenbed liuusueJ ZHIN O00 ZZZ 12849 lu unsnfpe 5 ZHIN 0087222 ZHN 004 222 ASu nba33 328uo Jamod 1 uoigSiuo ds 1ueunsnfpy uonoeg IN3W1S nr aV CHL WL uado pinoys uajanbs BSIMYDO O 031009 FOS
3. ou Jesu senor re oo eussemes meme Fe euscewos 1 Cow 1 __ K Function LED L H OFF NC Vco 20 O N gt i w 47 R5o Vdisp R51 R52 DISPLAY a DISPALY DT NC OPEN R61 Vref R62 TOE R63 TOE2 8721 INT2 NC OPEN SI INT Interruption PULL PS 7 Interruption DOWN 40 42 A 742 E 942 CIRCUIT DESCRIPTION HD404719A26H 1 0 PORT LIST ENCODERCK Interruption GND SC 1 0 Port name R73 INT3 Dm mem n N N N GND N N C GND C C C R92 SI2 R93 SO2 CLK OUT N GND RA2 TOG GND RA3 BUZZ NC GND 71 RBo TOC NC GND 72 RBi TOB NC GND Pull up with the hardware LOW active 1 DIMMER control of the various LED of CSEL is carried out means of 2 ports THe brightness is shown below 41 742 742 942 CIRCUIT DESCRIPTION 42 LCD DRIVER MSM5265 LIST DISPLAY UNIT X54 3130 11 IC201 No 1 IC IC LCD SEG LCD Pin No Pin coM1 No 80 INPHON I REMOTO 2 NEUE so 2 578 OFF 577 TOT 76 MUTE Baro 5 EN EN
4. 7 9 DTCIA4WK Dil issis4 CDBM455CI6 CFI CFWMASSF 5 100 922 amp 2502714 7 R20 R77 155 220M TX RX UNIT 57 5810 10 026 3 o z 2 e 9 191651 5 o Z viQ 5 Es E 2013 2 r amp P 2 8 b eri 22 E x 001 az z 8 a Nee 68H Ei ate 49 0 _ MOI 221 095 9 a5 m ot 1 1007 292 Sr an t ord 28 e S 3 if E E Nr o z a _ amp 107 x 012 E 001 6 u 5 2 o E 58 rj or x Ed 8 mm E i ms 5 x 3 lt Bo a d 0 4 5 t S t Fi ICT TSI 41 9012 Ria 100 862 PC BOARD VIEW 42 742 E 942 0 11 942A 0 12 742 K P E 2 M2 144M TX RX UNIT 57 3580 Foil side view 0 11 942A 0 12 742 AJE IK P E E2 2 144M TX RX UNIT X57 3580 XX Component side view MINOW Y3MOd IC1 BU4094BF IC2 LA5010M IC5 KCD04 IC6 KCDO5 IC7 KCAO4 ICB KCB11 IC9 KCC04 10 5 17 IC11 KCHO5 Q1 3SK184 S 02 35 131 12 03 8 20 25 2714 04 0 114 05 6 0TC123JK Q7 DTC143EK 010 25 1362
5. E z o MOMS an D S cu o 2 a in rr be Tov ee ooomoa o eo in u a E x 6 5 S m tu N r N g i m um g I lt 3655 o6 Hoare on tO 299 mo z gt 5 1C12 PST7030MT 1 13 14 7 4511 IC15 TC4W66F 1 16 110 4566 1C104 105 LA4446 10106 108 109 BU40538F 112 06 IC113 KCX04 IC114 KCCO7 e 02 5 6 9 10 101 106 2504116 Q3 7 DTC114EU 04 258815 6 7 08 107 109 2 01757 Q11 DTA144EU Q102 2SA1641 S T Q103 DTC144EK Q104 DTA144EK Q105 DTD143EK D1 DAN202U 02 4 6 112 D5 DTZ9 1A D101 103 DA204U u 5 Downloaded by PE ER O Na RadioAmateur EU x gt N 5 lt FE N ta N NC u N 2 N lt o N lt Q m m g 5 la st CONTROL UNIT X53 346X XX 0 11 z i 5 o c 5 8 o lt e e IC1 HD6433388A04F IC2 LC3564PML 12 123 781 IC4 TC74HC133AF IC5 TC74HC00AF 1 6 5 3520 1C7 HD74HC165PF IC8 BU4066BF IC9 103 NJM4558E IC10 TC35219F IC11 LC7385M I IC12 PST7030MT IC13 14 TC4S11F IC15 TC4W66F 16 110 7 4566 IC104 105 LA4446 IC106 108 109 BU4053BF IC112 KCC06 IC113 KCX04 IC114 KCC07 02 5 6 9
6. 53 28 MRLd MRLe 54 527 MRLE N B S26 MRLb amp MRLg 56 N 1 525 57 Pin 524 72 522 7 521 70 520 519 6 B 24 513 512 511 S10 59 TM 42A 742 942 CIRCUIT DESCRIPTION LCD SEG COM1 com2 Term No i ONAIR BUSY 59 E 92 a e to o B e P lt B IGd D m 8 100Md 100Me 72 100 58 B 10Mc 10Mb DISPLAY UNIT X54 3130 11 202 No 1 IC IC LCD SEG LCD i Pin Name COM2 Term No 5 S 87 2 E z Q N ee o e A 7 0755 REV 6 576 100Kf 4 S74 100Kc 1 89 572 10Kg 104 43 TM 742 742 E 942 CIRCUIT DESCRIPTION DISPLAY UNIT 54 3130 11 202 2 Ic IC LCD SEG LCD Pin Pin coM1 1 3 S53 B MRLb MRig 110 52 55 112 551 BUSY 113 550 51 114 549 52 53 116 54 BELL 95 S45 ALT 44 EN 1Gbc 41 100Md EI rr a gt gt gt 100 115 117 118 119 120 121
7. 092 0521 05 20WV CK73FB1E104K CHIP C 0 1UF CK73GB1H471K CHIP K 470pF CC73GCH1H221 J CHIP C 177 TM 42 742 E 942 178 TSU 7 CTCSS UNIT PC BOARD VIEWS Component side view Foil side view 7 Component side pattern CIRCUIT DIAGRAM 01 DAN202U E Foil side pattern rn C n7 UO rn e TM 742 742 E 942 MC 45 MULTI FUNCTION MICROPHONE EXTERNAL VIEW PARTS LIST New aaa Description A02 0896 08 CASE FRONT A02 0900 08 CASE REAR E30 3006 08 CURL CORD ASSY 613 0933 08 CUSHION UP DWN K29 3165 08 KNOB PTT K29 3168 08 KNOB UP K29 3169 08 KNOB DWN 29 3170 08 KNOB CALL VFO MR PF 559 1409 28 SWITCH ASSY UP DWN 540 1431 08 TACT SWITCH CALL VFO MR PF 40 1437 08 TACT SWITCH UP DWN 50 1431 08 MICRO SWITCH LOCK 31 1422 08 SLIDE SWITCH LOCK 91 0383 08 MICROPHONE ELEMENT SCHEMATIC DIAGRAM Moduler HLH Plug Idad D 57 d Q Q Q O RED mi EINEN Y CLEAR _ f V SHIELD W Ll 2 V co 7 TU r a 0 033 0 0474 aoe af 100p R2 O Q O O O O O L 2 2K R10 R8 R9 ECM 22 4 100K 22K 7 100K Downloaded by RadioAmateur EU 179 TM 742A 742 E 942 MC 45DM MULTI FUNCTION MICROPHONE WITH AUTOPATCH EXTERNAL VIEW PARTS
8. x 5 m 2 5 5 mu Me 5 e n x D z 55 558 5 E 4 Le 5 5 gt 5 ur x gt 2 s OSH m 49 N TM 742A 742 E1942 A BLOCK DIAGRAM DISPLAY UNIT 54 313 DISPLAY UNIT 54 313 FAN NIA N a CONTROL UNIT 53 346 A 2 CONTROL UNIT 53 346 spum ms ti s gt 55 55 A 170 169 1 1 fen C ene Bic NER S ______ T cv6 3 cVL WI Downloaded RadioAmateur EU 1 75 LINN 14510 1 75 LINA 14510 IuvuSvia 49019 LEVEL DIAGRAM M 742 A 742 El942 HWO OZZ ZH 6 ANVO MSE VCY6 WA MS 3 VCVYL WWL LNV 2 5 330 MS IH AAS AOT GIW IH INO OS ZHWNO 8Z 2 10821 ZHWO SED 2HINO SyL Aouenbej GOW ZHAL ZH3 sewooeq Jndu DIN 348 jes s Q 9 i i 229 IZO 9 Also i 0 121 1 ozt CP CD 5 L t 8 L OL T 1 PPA i lt lt 0121 821 131
9. IC6 SHIFT REGISTER Processing of the dimmer squelch and level functions is carried out by passing seria data from the microproces sor through the shift registers located IC113 and 1C114 BU4094BF The dimmer and the squelch levels are set by 24 bit control by using 3 shift registers The first 8 bits of the 24 bits are the dimmer level setting data shift register C and the remaining 16 bits are the squelch level setting data shift registers A B Figure 38 25 742 742 E 942 CIRCUIT DESCRIPTION More than 200 ns Dimmer data Squelch data Data Data of shift Data of shift Data of shift register C register B register A Clock Clock Clock 5 8 bit 8 bit 8 bit Enable Buit up at last Q8 Q7 Q6 Q5 04 Q3 Q2 91 Fig 38 O Shift register C Squelch data are entered after this ES th n 150 Mora e ps ni Fig 39 The dimmer level setting is carried out by using 3 bits follow the 8 bit data used for setting the dimmer level out of the 8 bits of the shift register The remaining 5 Figure 40 bits Q4 to Q8 are open ports and they are stuck at H during transmission Figure 39 Refer to the SHIFT REGISTER PORT SPECIFICATION The squelch level is set by using the 16 bit data that LIST for the port specifications of each shift register More than 200 ns Q8 Q7 Qe Q5 Q4 Q3 02 01 Q8 Q7 Q6 95 Q4 Q3 Q2 Q1 Entered in succession shift re
10. MULTIPLE COMPONENTS C R L MULTIPLE COMPONENTS C R L CHIP R 1 0K J 1 10 CHIP R 47K 1 10W CHIP R 1 0K J 1 104 CHIP R 4 7K J 1 10W CHIP R 1 0K J 1710W CHIP R 150K J 1 10W CHIP R 22K J 1 10W CHIP R 1 0K J 1 10W CHIP R 3 3K J 1 104 CHIP R 560 J 1 10W CHIP R 3 9K J 1 109 CHIP R 8 2K J 1 10 CHIP R 18K J 1 10W CHIP R 100K J 1 10W CHIP R 1 8K J 1 10W CHIP R 220 J 1 10 4 CHIP R 12 J 1 10W CHIP R 82K J 1 10W CHIP R 220K J 1 10 CHIP R 180K J 1 10W CHIP R 1 0 J 1 10W CHIP R 4 7K J 1 10q CHIP R 10K J 1 10W CHIP R 47K J 1 10W CHTP R 4 7K J 1 10W CHIP R 10K J 1 104 CHIP R 470K J 1 10W CHIP R 56K J 1 10W CHIP R 470K J 1 10W CHIP R 4 7K J 1 10W CHIP R 330K J 1 104 CHIP R 680K J 1 10W CHIP R 47K J 1 10W A TM 742 K P M 2 E 2 B TM 942 K P M 78 TM 42A 742 E 942 New Parts Parts without Parts No are not supplled Les articies non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert Ref No Address Parts No SMES E s CONTROL UNIT X53 3460 XX Description a R Fk R37 RK73FB2A334J CHIP R 330K J 1 10W R38 R92 0670 05 CHIP R 0 OHM R39 RK73FB2A101J CHIP R 100 J 1 10W R40 7 2 103 10K J 1 10W R41 RK73FB24152J CHIP R 1 5K J 1710W R42 RK73FB2A102J CHIP R 1 0K J 1 10W R43 RK73FB2A394J CHIP R 390K J 1 10W R44 RK73FB2A473J CHIP R 47K J 1 10W R45 RK73FB2A472J CHIP R 4 7K J 1 10W R46 92
11. NN hu TT IC3 4 5 6 203 206 Serial data inverter buffer 5v IC201 202 LCD driver 204 Flip flop Enable generation circuit IC205 i ea LED switch for function ON during function tr iwan Prevention of back flow when common terminal is connect ed by mistake with CN3 For LCD driver flip flop inverter D2 Back flow prevention LED for illumination 0101 102 103 104 105 LED for function 0107 108 109 110 111 112 114 LED for illumination 53 742 A 742 942 54 DESCRIPTION OF COMPONENTS 28TX RX unit X57 3790 01 UT 28S M Use Function 2 V during locking VCO PLL Data input Clock input Enable input Operation Condition Compatibility See Circuit Description Modulation input 8 V during transmission 0 V during reception Lock voltage HET output Low frequency Lomlrequency amplifier imiter _ limiter Microphone amplifier Operation during transmission 28 29 695 MHz D Input Output 28 MHz band transmission Drive Second local oscillator mixer D First IF input 8 83 MHz 8 Second local oscillator input 9 285 MHz IF amplifier detector Squelch output busy signal 0 V while busy Low frequency amplifier Noise detector Noise detection voltage output DC Squelch switch i Signal strength meter output Detection output RD output AF OUT Out of band reception HET input 2 IF output 8 8 V B V ou
12. Teile ohne Parts No werden nicht gellefert Ref No Address Parts No SMES 13 28C2712 Y DTC144EU 28D1757CK 28A1362 Y DTC124EK 28C4226 R23 24 28C2712 Y 2501760 9 FMG1 2SJ106 GR DTC114EK 1200M TX RX UNIT X57 3600 11 Description TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET DIGITAL TRANSISTOR Downloaded by RadioAmateur EU A TM 742 K P M M2 E E2 E3 B TM 942 K P M 97 TM 742 A 742 942 x Now Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis ohne Parts No werden nicht geliefert 28M TX RX UNIT X57 3790 01 Description Ref No Address Parts No GHJE t 5 i 28 TX RX UNIT 57 3790 01 10 1325 11 CHASSIS B42 2437 04 LABEL S NQ UNIT CC4SSL2H18N J CERAMIC 180PF J CC45SL2H221J CERAMIC 220PF J CC45SL2H271J CERAMIC 270PF J CC45SL2H151J CERAMIC 150PF J CK78GB1H103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 0108 K CK73GB1H103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CK73GB1H103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CC73GCH1H220J CHIP C 22PF J CK73GB1H103K CHIP C 0 01UF K CC73FCH1H030C CHIP C 3PF C CK73GB1H103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CC73FSL1H101J CHIP 100PF J CK73FB1E103K CHIP C 0 01UF K CEOANW1C470M ELECTRO 47UF 16WV C
13. 11 21 LABEL S NQ B42 2437 04 CC73FCH1H030C CHIP C 3PF CK73FB1H102K CHIP 1000PF K CC73FCH1H1RSC CHIP C 1 5PF C CC 3FCH1H390J CHIP C 39PF J CK73FB1H102K CHIP C 1000PF K CK73FB1H102K CHIP C 1000PF K CC73FCH1H010C CHIP C 1PF 1PF 1 020 2PF CC73FCH1H390J CHIP C 39PF J CK73FB1H102K CHIP C 1000PF K CK73FB1H102K CHIP 1000PF K CK73FB1H102K CHIP C 1000 K A TM 742 K P M M2 E E2 E3 B TM 942 K P M 87 TM 742 742 942 New Parts Parts without Parts No are not supplied Les articles non mentionnes dans Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert 430 440M TX RX UNIT X57 3590 XX Address Parts No Description t CC73FCH1H050C CHIP CK73FB1H102K CHIP CC73FCH1H060D CHIP 1 102 CHIP CC73FCH1H560J CHIP CC73FCH1H330J CHIP CC73FCH1H330J CHIP CC73FCH1H180J CHIP CC73FCH1H330J CHIP CC73FCH1H330J CHIP 1 102 CHIP 1000PF CEO4NW1CA70M ELECTRG 47UF CK73FB1H102K CHIP C 1000PF 7 1 1052 1 00 92 0003 05 0 47UF CK73FF1C105Z CHIP C 1 0UF CK73FB1H102K CHIP C 1000PF CK73FB1H102K CHIP C 1000PF CEO4NW1C470M ELECTRO 4 UF C92 0504 05 CHIP TAN 0 68UF RAN PON KER NG gt lt CEO4NW1C470M ELECTRO 47UF 1 102 CHIP 1000PF CEO4NW1C470M ELECTRO A
14. CERT me ec gt lt lt x C N t 714 m e 9061 59 iwevsa E E sia a i 12 as 25 i 25 o 78 a 2 40001 9042 82 z n CN M 25 NS m 5 Vee WOOL 12 44 8900 1902 001 THA vit 985 917 5 s Ar NIE 5 fo 2027 58 oe 5 SES AGE iv 1029 262 Seg 500 5025 s 25 s I 55 28 55 m E gt x E Gp os 99 z m x Seu os gt 100 5 8 2052 x 213 25 m Fatal 3 H D oiv 5 E 10 FEY 4 nL 113 6 oe 50 w 9 zi 8 I 5 ac Os rt 496 6212 E 10 eza m w pos Jod ox gt C ss Cr DE 9 c a bow 2 mE x degt 4001 862 o rt y D x B 2 ae gt x ME 9 2 5 10 12 28 0 CET M a xoo ef 06 TEM T85 04 15v228 T oo HE 5 i SSKITSILI 5 E 5 1275 Q27 DICI44EK 3 1 1 5 57
15. Lock voltage Data input Clock input Enable input PLL output Operation during reception 144 MHz band Q1 High frequency amplification az First IF amplification Operation during reception Operation during reception 10 7 MHz Q15 Q16 Q17 742 AJ 42 942 DESCRIPTION OF COMPONENTS Transmission and reception power selection Inverter Lo 0 V during lock Q10 Q12 and Q13 are set OFF during transmission Q11 and 014 set during transmission Q10 Q12 and Q13 are set ON during reception Q11 and Q14 are set OFF during reception Modulation muting ON during reception 19 Q20 21 D15 D16 017 018 CV line buffer PLL output amplification 8 V filter Middle low POWER switch APC control Antenna transmission and reception selection Power detection 144 MHz band Middle and low POWER switches are set ON when high Operation during transmission OFF when busy P ON during transmission OFF during reception APC Power reverse connection protection 61 42 AJ 42 E 942 62 DESCRIPTION OF COMPONENTS 220 TX RX Unit X57 3810 10 UT 220S K Operation Condition Compatibility WIII IIIOIIIMI Shift register See Circuit Description IC1 IC2 9V AVR 9v 13 8v IC5 Second local oscillator mixer First IF input 30 825 MHz IF amplifier detector Low frequency amplifier Noise detector Squeic
16. NN n gt gt N 0 ou ss QOGOGOQNQNQGQCG n IC1 BU4094BF XRU4094BF IC2 KCH10 IC3 KCA04 KCB18 IC5 KCC04 IC6 KCD04 IC7 LA5010M IC8 KCB19 IC9 KCD05 01 35 184 5 02 35 131 12 Q3 8 20 2SC2714 Y 04 15 17 DTC144EK Q5 DTC144EU Q6 7 25 DTA114K Q9 2SJ106 GR Q10 2SA1362 Y Q11 2SB1119S Q12 DTC144WK Q13 FMW1 014 21 24 2SC2712 Y 018 2501757 019 25 208 Q22 FMG1 Q23 2SD1902R Q26 DTC143EK be lt m A pattern 162 161 TM 742 A 742 E 942 SCHEMATIC DIAGRAM Common DC line ine Signal line Control 0202 wnr s2 1 X58 3840 03 2 2 E 50M TX RX UNIT X57 3800 XX L 9089 vou 04 5 300 800 0112 300 6012 3001 8015 500 109 KS 400 9012 Oiv 400 012 400 6012 I 910 1915 14 4001 72015 5 NE 5 EE Li a on 2 s 5 I E dost veo 1 rd M s TE x x Ipu o 55 5 001 j ie 18A 8 5 5 9 5 E 2 x 5 5 as 2 5 me 100 5 112 x m 50M TX RX UNIT 57 5800 01 ICG 025 DTAIIGEK NZZ 10 Paw ts p 423
17. R Binary 14 bit programmable counter setting value 2560 in 5 10 15 and 20 kHz steps 2048 in 12 5 and 25 kHz steps In 5 10 15 and 20 kHz steps nis 705 and is 80 Therefore fyco 705 x 128 x 12800 2560 90240 80 x 5 451600 451 6 MHz See the 144 MHz band unit 57 3580 00 for the function of each pin of IC10 in the PLL circuit e 8T 8 during transmission and unlock signal See the 144 TX RX unit description on page 13 The figure on the under indicates the 430 MHz unit 8c 742 A 742 942 CIRCUIT DESCRIPTION 18 TM 942A UT 1200 1200 TX RX Unit Frequency Configuration The 1200 MHz unit incorporates a digital variable frequency oscillator VFO that freely can selecta channel step of 10 12 5 20 or 25 kHz with a PLL synthesizer system The frequency in the receive signal channel is mixed with a frequency of 1200 3 to 1240 20 MHz obtained when a first local oscillation frequency of 600 15 to 620 145 MHz is multiplied by 2 to produce a fist 240 1299 99MHz W 1240 1299 99MHz intermediate frequency of 59 7 MHz This frequency is then mixed with a second local oscillation frequency of 59 245 MHz to produce a second intermediate frequency of 455 kHz This is called a double conversion system The signal in the transmission channel is oscillated and frequency divided by a PLL circuit then multiples the frequency of 630 to 649 995 MHz by two to produce a frequency of 1260 to
18. 438 449 995 MHz RF AMP TX AMP 430 439 995 MHz of 21 6 MHz The frequency is then mixed with a second local oscillation frequency of 21 145 MHz to produce a second intermediate frequency of 455 kHz This is called a double conversion system The signal in the transmission channel is directly oscillated and frequency divided by a PLL circuit amplified by a straight amplifier then transmitted 21 145 MHz 451 6 461 595 MHz 459 6 471 595 MHz 438 449 995 MHz The alphanumeric characters enclosed in parentheses are used for K models Fig 16 Frequency Configuration 430 TX RX Unit Receive Signal Channel e Outline A 430 MHz band antenna input signal is passed through the antenna selection diode in the final stage and sent through a front stage antenna matching coil to the high frequency two stage amplifier and helical block of a GaAs gallium arsenide FET and junction FET The signal is then input to the first mixer The first mixer input signal is mixed with the first local signal from the PLL circuit and converted to a first intermediate frequency signal of 21 6 MHz The unwanted near by signal components are then eliminated by a two stage MCF The first intermediate frequency signal is amplified and input to FM IF KCDO4 This signal is then mixed with a second local oscillation frequency of TX power selection L when middle and low H when high TX po
19. 52 0334 04 942 144 440 1200 52 0335 04 942 144 430 1200 POLYSTYRENE FOAMED FIXTURE SO 410 2696 12 PROTECTION BOARD 62 H13 0897 04 ITEM CARTON BOX 305 TM 42A 742 942 PACKING OPTIONAL BAND UNIT 311 INSTRUCTION MANUAL B62 0089 10 320 PROTECTION BOARD H13 0855 04 POLYSTYRENE FOAMED FIXTURE 10 2726 03 SHEET G11 0665 04 335 SCREW SET N99 0355 05 PROTECTION BAG 25 0760 04 330 300 O RING CAUTION LABEL J69 0325 05 B41 0686 04 ata 340 317 TX RX UNIT 322 LI TERMINAL X57 3790 01 UT 28S PROTECTION BAG E23 0657 04 X57 3800 01 UT 50S H25 0029 04 X57 3810 10 UT 220S X57 3590 12 UT 440S 309 X57 3600 11 UT 1200 LABEL ZA B42 3488 04 326 ITEM CARTON BOX H52 0130 04 UT 28S H52 0133 04 UT 50S H52 0136 04 UT 220S H52 0197 04 UT 440S H52 0112 04 UT 1200 328 OUTER PACKING CASE H62 0110 04 285 H62 0113 04 UT 50S 62 0116 04 UT 220S H62 0169 04 UT 440S H62 0101 04 UT 1200 LABEL B42 2454 04 121 42 A 742 942 ADJUSTMENT Required Test Equipment 1 2 8 9 Tester and DC V M Use a tester with high input impedance RF VM Input impedance 1 M ohms or more 2 pF or less Voltage range FS 10 mV to 300 V Measurable frequency 1 300 MHz maximum Frequency counter F counter Input sensitivity Approximately 50 mV Measurable frequency 1
20. 942 x New Parts Parts without Parts No are not supplied Les articles mentionnes dans le Parts No ne sont pas fournis ohne Parts No werden nicht gellefert Ref No Address Parts No PMES HR XS 1200M TX RX UNIT X57 3600 11 Description C114 116 CK73FB1H471K CHIP 470PF C117 CK73GB1H102K CHIP 1000PF C118 7 1 103 0 01UF C119 CC73FSL1H101J CHIP 100PF 120 CC73FUJ1H221J CHIP 220PF C123 125 C126 130 C131 C132 C133 C134 137 C138 C139 C140 C141 142 144 145 147 156 157 C188 C159 E22 0672 04 E22 0673 04 E23 0467 05 0 3011 05 40 5461 05 11 0442 05 10 1444 03 F10 1445 04 F10 1446 04 F10 1457 14 F10 1475 04 G02 0599 04 G02 0706 04 G11 0654 04 011 0655 04 G11 0660 04 G11 0661 04 G13 1319 04 G53 0508 04 J42 0471 04 L79 1013 08 L72 0366 05 L79 1015 05 L34 4259 05 L71 0280 05 L34 2034 05 L40 3982 19 L40 5682 19 L77 1375 05 L77 1376 25 N09 2077 05 N87 2606 46 N88 2606 46 94 CHIP CHIP CHIP CHIP CHIP CK73FB1H471K CK73FB1H471K CK73GB1H103K CK73GB1H471K CK73FB1E103K CHIP ELECT CHIP CHIP CHIP CK73FB1H471K CEO4NWO0J470M CC73FSL1H101J CK73FB1E104K CK73FB1H471K CHIP CHIP CHIP CHIP CHIP CC 3FSL1H101J CC73GCH1H101J CK73GB1H102K CK73FB1H102K CC 3FSL1H101J TERMINAL BOARD TERMINAL BOARD TERMINAL ANT CABLE PIN CONNECTOR 12P SHIELDING CGVER SHTELDING VCO SHIELDING M
21. EE r N 8 574 amp ON AIR BUSY N AB S73 L e n a i 572 any gt E 571 569 N 568 E c MESE o s EUN S66 16 7 S65 100Ma 100 1 564 100Md amp 2 on 15 14 lt o N 18 20 1 S60 gt 57 10Mb 10Mg 25 c css N 556 555 27 2 cow Term 3 53 6 29 REV S52 IMc 30 31 S51 32 100 550 0755 549 amp 100Ka 100 33 34 n 48 100Kd 100Ke 47 e 100Kc 546 CLKdp 6 100 36 37 9 545 100Kb 100Kg 38 544 Burst1 Burst2 43 10 39 3 10 S42 10Ke 40 10Kdp 10Kg SF 43 1Kf 1Ke 05 K 1kg 47 co 48 N 41 41 lt amp 10Kc 40 10Kb 42 S39 Ax 88 38 1 44 7 537 1 45 536 1Kc 46 ol 535 1Kb 34 U 49 w 533 82 532 50 8 LOCK 51 530 MRHb 6 MRHg 52 79 529 MRLa
22. IF IC LOE SATURATION REGULATOR ICC PRE 50 BAND IF FET FET TRANSISTOR DIGITAL TRANSISTOR A TM 742 K P M M2 E E2 E3 B TM 942 K P M x New Parts Parts wlthout Parts No are not supplled Teile ohne Parts No werden nicht geliefert No Address jh m DTA114EK 2SC2714 Y 2SJ106 GR 28A1362 Y 2SB1119 5 DTC144WK FMW1 2SC2712 Y DTC144EK 2SD1757 K 2SK208 Y 2562714 2SC2712 Y FMG1 25019028 2SC2712 V DTA114EK DTC143EK DTC144EK X58 3840 01 742 A 742 942 28M TX RX UNIT X57 3790 011 28 SUB UNIT X58 3840 01 50 TX RX UNIT X57 3800 01 Description PARTS LIST Les articles non mentionnes dans le Parts ne sont pas fournis DIGITAL TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR SUB UNIT 28MHZ SOW 28 SUB UNIT X58 3840 01 CC 3FCH1H471J CK73FB1H152K CM73F2H241J L34 1357 05 L40 1001 19 R92 0686 05 25 1971 25 3240 390 1500 CHIP C 240 COIL 2T SMALL FIXED INDUCTOR 10UH CHIP R 33 J 1 24 TRNSISTOR TRNSISTOR 50 TX RX UNIT X57 3800 01 10 1325 11 B42 2437 04 CC45SL2H750J CC45SL2H560J 4551 2 680 7 CC45SL2H101J CC45SL2H680J CC45SL2H120J CC45SL
23. P76 AN6 DA0 P93 RD PTT ANT DA1 P92 IRQO P91 RQT 42 P40 TMCIO PS0 RQZ ADTRG qq m o 2 z lt lt lt lt lt K w SERRE SEE FE Circuit Control Terminal c Reset terminal O Reset state 1 Ordinary state Operation mode Mode 2 setting Set to 1 Operation mode Mode 2 setting Set to O TM 742 A 742 E 942 A CIRCUIT DESCRIPTION HD6433388A04FI O PORT LIST Back P13 Circuit Terminal name External RAM Address External RAM CE2 P__RAMCE2 External RAM CE1 Input composing AND with P_RAMCE12 External CE1 input composing AND with P_RAMCE11 P RAMCE12 External RAM Expander data 29 TM 742A 742 942 CIRCUIT DESCRIPTION HD6433388A04F1 0 PORT LIST M M Circuit COM Terminal 1 0 Port Port Name P34 D4 DATA 235 p_DAT5 1 0 P36 p_DAT6 P37 P DAT7 1 0 Clock chip select 0 Selected state P CKCS S3520CF CS 1 High impedance P40 TMC10 N Clock data input P CKSOUT S3520CF SOUT Clock write select P_ CKWR S3520CF WR Clock data output CTCSS Unit Data 53520 SIN Beep sound output Stuck at the 1 level 2 when there is output of BZ terminal Effect sound P__CKSIN TMCI1 TMO1
24. Parallel input terminal bit 7 Existence of repeater function Parallel input terminal bit 6 FAN delay time setting bit 1 1 The time is set in combination with terminal No 4 VO Expander terminal name TM 742 A 742 942 CIRCUIT DESCRIPTION 8 bit Shift Register HD74HC165F Expander terminal name Parallel inptu terminal bit 5 FAN delay time setting bit 0 IE Terminal No F FANDLO E 3 _ 1 FAN Delay Time setting input 1 The time is set in combination with terminal No 5 Parallel input terminal bit 4 Transmission remodeling data bit 4 0 Remodeling 1 No remodeling P FANDL 1 FANDL 0 Permanently ON when POWER is ON ON during transmission ON during 1 1 minute after and of transmission ON during transmission ON during 2 1 1 minutes after end of transmission TIMING CHART SHIFT LOAD E PH Qe ens F Pub SRS ea G T 0 H i H ie sees ease eed bare ids t aaa Sek cach Tae EAS aS eee OUT PUT QU H L H L Since S L is stuck at H data are outputted from QH LOAD at the leading edge of the clock 37 740 742 E 942A CIRCUIT DESCRIPTION 1 0 PORT SPECIFICATION LIST DISPLAY UNIT 54 3130 11 1 HD404719A26H 70 RA3 BUZZ 78 RDO ANA 77 RC3 AN3 76 Rc2 AN2 75 Rci AN1 74 RCO ANO
25. RY DISPLAY UNIT X54 3130 XX B11 1070 04 B11 1071 04 CK73GB1H102K C92 0004 05 CK73GB1H102K C92 0045 05 CK73GB1H102K CC73GSL1H101J CC73GCH1H330J CK73GB1H102K CK73GB1H472K CK73GB1H102K CK73GB1E103K CK73GB1H102K CK73GB1H102K CC73GSL1H101J CK73GB1E103K CK73GB1H102K C92 0047 05 CK73GB1E103K E29 1112 14 E37 0309 05 E40 3262 05 40 5587 05 40 3262 05 40 5887 05 40 3262 05 G11 0688 04 J21 4409 03 J30 0563 05 177 1504 05 N14 0552 05 R90 0720 05 RK73FB2A102J RK73GB1J681J RK73GB1J102J RK73GB1J681J RK73GB1J102J RK73GB1J681J RK73GB1J102J RK73GB1J681J RK73GB1J102J RK73GB1J681J RK73GB1J102J FILTER CLCD FILTER LCD CHIP C ELECTRO CHIP C ELECTRO CHIP C CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP c gt G O O CHIP C ELECTRO CHIP C CONNECTOR amp TER PIN CONNECTOR PIN CONNECTOR PIN CONNECTOR PIN CONNECTOR PIN CONNECTOR AUXILIARY PAR MOUNTING HARD SPACER CRYSTAL RESON NUT ENC VOL MULTI COMP CHIP CHIP CHIP CHIP 20 20 20 25 CHIP CHIP CHIP CHIP CHIP 0 CHIP CHIP 20 2 1000PF 1 0UF 1000PF 22UF 1000PF 100PF 33PF 1000 4700PF 1000PF 0 010UF 1000PF 1000PF 100PF 0 010UF 1000PF 47UF 0 010UF ROR RU 5 5 MINAL FOR INSIDE FOR INSIDE FOR INSIDE FOR INSIDE FOR INSIDE T WARE LCD ATGR CAMHZ G Ca Oe C4 C4 C4 Ca C CS C A TM 742 K P M M2 E E2 E3
26. Sup Subject TM KENWOOD sw nfo Amateur Radio Division Date February 23 1993 lementar 742 942 Mars CAP Modification Guide Procedure 1 2 Detach the front panel from the main chassis Remove the bottom cover of the transcevier by removing the 4 screws on the bottom of the cover and loosening the 4 screws on the sides of the unit Orient the radio so the bottom is up and the front panel area is near your chest Near the front panel area you will find a large board this is the Control Unit Remove the chip resistor noted in the diagram below and reinstall it as shown Control Unit X53 346X XX A 2 5 Reinstall the bottom cover of the transceiver and reattach the front panel 6 Reset the microprocessor Press and hold the MR key while the power is switched on Then release the MR key This will erase all operator programmed data 7 The frequency range after modification will be Remove resistor from this position and install it in this position 144 MHz Band RX Unchanged 118 MHz thru 174 MHz TX 142 000 MHz thru 152 000 MHz All other band modules will remain unchanged with this modification Front Panel Area 22493 by CLM for Kenwood U S A Page 1 of 1 TM 742 A742 942 CIRCUIT DESCRIPTION 28 TX RX Unit Frequency Configuration The 28 MHz unit incorporates a variable frequency oscillator VFO based on a phase locked loop PLL synthesizer system that allows a cha
27. 1857 In this case is 155 and A is 6 1C2 KCH09 2 V during lock Modulation input Bv 8 V during transmission 0 V during reception Lock voltage 9 285 MHz Data input Clock input Enable input HET output Fig 3 e 8 V during transmission and unlock signal The signal output from pin 4 of IC1 is high during reception 013 is turned and Q14 and O11 areturned off No voltage appears at the collector 8T of 011 Serial data is output from the contro unit during trans mission and input to shift register IC1 Pin 4 of IC1 is then made low Therefore O13 is turned off and 14 and Q11 are turned on An 8 V voltage is applied to the collector 8T of Q11 if the PLL circuit is unlocked during transmission the LD pin goes low 024 is turned off Q13 is turned on Q14 is turned off 011 for BT switching control is turned off and the 8T line does not operate 8T 8c LD 0 7 V during unlock 2 V during lock Therefore z 11 5x64 6 9285 1857 7360 6 x5 36 83 MHz The following table lists the pin functions of the PLL circuit Pin name Function Pin name Function 5C 5V MO Modulation signal input Lock signa 2 V LD during locking 9c 9v NC Unused 8CL 8 V ripple filter 8 V during transmis ST sion 0 V during reception 9 285 MHz crystal oscillation XI XO CV Lock voltage output DP Data input iii E GND CP HT HET output Clock input Enable input Table 4 PL
28. 2 aoe 8 re 8 a S P m 8 Ei al A 015 ore vv rS x 22 WV 3T 151 122282 50 r CD y 8 365 13 IH wate Pon 912656802 gt n 665 a 4 t 5 a 22 vu eo Ir TALEO 1833 691 28 01 INOS 7 081551 SNIHOIIMS MOT z BASdS SOI LNOD a E 008 010671 921 2800 OSI 862 9 H j CON 218252 15 11052 5 I t 942 098 o 212 tat ii SN taper Re 4 4 nD goz YV bod 2 41 8 9 TE i EEIN ied 49 3 veo ezi d8 Q 3 val 461 2X b3 g 8 5 Ls z LNY 2 11a 024 1 093 EU E E dpa a 5 mee a Og aa o 893 80 Ag RIB HOSE mE H3LINWITdWV SIWON 221 65 0 LINN 04 05 jeubig 2 06 151 3indoW en em XX O6GE LSX LINN XH X L INVYDVIC 211 1 3 25 uouiuo2 PC BOARD VIEW M 742 742 E 942 220M TX RX UNIT X57 3810 10 220M TX RX UNIT X57 38 10 10 Component side view BU4094BF 2 3SK184 M57774 s G 2SK208 G m A pattern 1
29. 742 P 2 2 942 K P New Parts TM 42A 742 E 942A PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Address ft W 2G Ref No Parts No 10 1446 04 10 2010 03 10 2012 04 F20 1008 04 G02 0600 14 002 0705 04 G02 0715 04 G02 0718 04 611 0655 04 G11 0656 14 G11 0661 04 G13 0841 04 G13 1337 04 G13 1349 04 G13 1351 04 J42 0471 04 L79 1013 05 L72 0372 05 L34 4279 05 L40 1082 19 L34 4280 05 L40 1582 19 L34 1239 05 L34 1207 05 L34 1208 05 L34 0908 05 L34 0641 05 L40 8272 48 L40 1001 19 L40 1092 19 L40 3372 48 L77 1405 05 L77 1463 05 L71 0420 05 N09 2077 05 N87 2606 46 N88 2606 46 220M TX RX UNIT X57 3810 10 Description BA t SHTELDING PLATE SHIELDING COVER SHIELDING CASE VCO PLL INSULATING SHEET APC FLAT SPRINGCTHERMAL SWITCH FLAT SPRING FLAT SPRINGCAPC TR FLAT SPRING VCG SHEET CN1 CN2 55X8 CONDUCTIVE RUBBER INSULATING SHEET APC TR CUSHIQN XTAL 22X7 CUSHIQN 55X8 DC CORD BUSHING FILTER CERAMIC FILTER CFWM455F CGIL 1ST IF SMALL FIXED INDUCTOR 0 1UH COIL SMALL FIXED INDUCTSR O 15UH COIL COIL COIL COIL COIL SMALL FIXED INDUCTGR 82NH SMALL FIXED INDUCTGR 1QUH SMALL FIXED INDUCTOR 1UH SMALL FIXED INDUC
30. B TM 942 K P M 81 42 742 942 82 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentlonnes dans le Parts No ne sont pas fournis DISPLAY UNIT X54 3130 XX Telle ohne Parts No werden nicht gellefert 144M TX RX UNIT X57 3580 XX Ref No Address New Parts No Parts PRES FEF 8 Description 12 RK73GB1J681J CHIP R 680 J 1 16W R13 RK73GB13J102J CHIP R 1 0K J 1 16W R14 15 RK73GB1J103J CHIP R 10K J 1 16W R16 RK 3FB24222J CHIP R 2 2K J 17109 R17 RK73GB1J331J CHIP R 330 J 1 16W R18 RK73GB1J473J CHIP R 47K J 1 16W R19 RK73GB1J470J CHIP R 47 J 1 16W R20 RK73GB1J100J CHIP R 10 J 1 16W R21 RK73GB1J105J CHIP R 1 0 J 1 16W R101 RK73FB2A561J CHIP R 560 J 1 10W R102 RK73FB2A102J CHIP R 1 0K J 1 10W R103 RK73GB1J473J CHIP R 47K J 1 16W R104 RK73FB24A272J CHIP R 2 7K J 1 10W R105 RK73FB2A162J CHIP R 1 8K J 1 10W R106 RK73FB2A272J CHIP R 2 7K J 1 10W R201 203 RK73GB1J3R3J CHIP R 3 3 J 1 164 R204 205 RK73GB1J1007 CHIP R 10 J 1 16W R206 RK73GB1J105J CHIP R 1 0M J 1 16W R207 RK73GB1J104J CHIP R 100K J 1 16W R208 209 RK73GB1J222J CHIP R 2 2K J 1 16W R210 RK73GB1J223J CHIP R 22K J 1 16W R211 212 RK73GB1J100J CHIP R 10 J 1 16W VRI 3 R23 9409 05 POTENTIOMETER TACT SWITCH TACT SWITCH S70 0408 05 S 0 0409 15 S101 112 S113 115 B38 0379 05 DISPLAY ASSY MA112 MA720 B30 2025 05 B30 2048 05 LED LED 03 4 0101 105 0107 112 B30 205
31. CK73FF1C105Z CEO4EW1A221M CK73FB1H102K CK73FB1E104K CC73FCH1H121J CC73EFCH1H390J CC73FCH1H330J 76 CHIP CHIP CHIP CHIP CHIP 1000PF 0 1008 1 006 0 02208 1000 0 1002 1000PF 0 10UF 1000PF 1 006 CHIP CHIP CHIP CHIP CHIP CHIP 0 10UF CHIP CHIP CHIP CHIP gt 100PF 4700PF 12PF 0 012UF 22PF 1800PF 150PF 100PF CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP ELECTRO 1000PF 1 0UF 0 022UF 1 0UF 220UF 9900 OOO O CHIP C CHIP C 0 10UF CHIP C 120PF CHIP C 39PF CHIP C 33PF 5 1000 742 2 2 B TM 942 K P 4 7UF b TM 742 A 742 El942 x New Ports PARTS LIST Parts without Parts No are not supplied Les articles mentionnes dans le Parts No sont pas fournis Teile onne Parts No werden nicht gellefert Ref No Address Parts No SMES m 5 CONTROL UNIT X53 3460 XX Description E SR HK C39 41 CK73FB1E103K CHIP C 0 0108 K C 42 CK73FB1H102K CHIP C 1000PF K C43 CK73FB1E104K CHIP C 0 10UF K C44 CK73FB1E103K CHIP C 0 01UF K C45 CK 3FB1H332K CHIP C 3300PF K C46 CC73FSL1H101J CHIP C 100PF J C47 CK73FB1E103K CHIP C 0 01UF K C48 CK73FB1E223K CHIP C 0 022UF K C49 CK73FB1E103K CHIP C 0 01UF K C50 CK73FB1H102K CHIP C 1000PF K C53 CK73FB1E104K CHIP C 0 100 K C101 CK73FF1C105Z CHIP C 1 0UF 2 C102 103 CK73FB1H102K CHIP C 1000PF K C104 CEO4E
32. KCCO6 KCX04 KCC07 2SC3722K S 25 4116 DTC114EU 28B815 6 7 28C4116 Y DTC114EU 2501757 28C4116CY DTA144EU 28C4116 Y 28A1641 CS T DTC144EK CONTROL UNIT X53 3460 XX Description HEZM CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP 70 20 020 20030 00 20 20 20 20 20 DIGDE DIODE DIODE DIODE DIODE IC CPUD IC 8192 X8 RAM IC IC IC 2 INPUT NAND GATE ICCANALOG SWITCH X4 AMP IC DECODER C I IC 2 INPUT NAND GATE IC IC BILATERAL SWITCH AMP IC AF PQWER AMP ICCANALOG MULTIPLEXER ICCANALOG MULTIPLEXER IC BILATERAL SWITCH TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR A TM 742 K P M M2 E E2 E3 B TM 942 K P M yO G x New Parts 42 A 742 942 PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert C10 C19 20 C21 22 C23 C101 103 C201 C202 203 C204 205 C206 207 C208 C209 DTA144EK DTD143EK 2504116 7 2501757 09 0573 05 CONTROL UNIT 53 3460 DISPLAY UNIT X54 3130 XX Description DIGITAL TRANS ISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR LITHIUM BATTE
33. Les articles mentlonnes dans le Parts No sont pas fournls 220M TX RX UNIT X57 3810 10 Teile Parts No werden nicht gellefert Ref No Address New Parts Sees f H g Parts No 5 15 164 15 164 155184 DAN235 K 155181 MI407 MI308 188226 DSA3A1 15 164 BU4094BF XRU4094BF LASOO9M KCD04 KCA04 KCB15 KCC04 M57774 KCH08 3SK184 S 2502714 7 2541362 7 25811195 DTC144WK 2SC2712 Y DTC1A4AEK 2SD1757 K 2SK208 Y 2SC2714 Y 2502712 7 FMG1 2SD1902R 2SJ106 GR5 B41 0686 04 B42 2437 04 B42 2454 04 42 3488 04 862 0089 10 23 0657 04 011 0665 04 10 2726 03 13 0855 04 25 0029 04 25 0760 04 52 0130 04 H62 0110 04 J69 0325 05 99 0355 15 57 3790 01 Description DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE IC SHIFT STORE REGISTER IC IC LGE SATURATION REGULATOR IC FM IF IC MIC AMPLIFIER IC DRIVE AMP 220M BAND IC APC IC POWER MODULE 220 225MHZ IC 220 PLL VCG FET TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET CAUTION LABEL CADJUST LABEL S NG UNIT LABEL S NO ITEM CARTON BOX LABEL FREQUENCY INSTRUCTION MANUAL TERMINAL SHEET FAN CABLE POLYSTYRENE FOAMED FIXTURE PROTECTION BOARD PROTECTION BAG 60X110 PROTECTION BAG 200X350 ITEM CARTON
34. Q11 2SB1119S Q12 DTC144WK 013 14 21 2SC2712 Y 015 17 144 018 2501757 019 25 208 Q22 FMG1 023 25019028 Q24 2SJ106 GR 01 3 4 6 15 164 D2 5 7 15 166 011 12 155184 D13 DAN235 K 014 155181 D15 MM07 D16 MI308 017 18 155226 D19 DSA3A1 D20 MA77 LL x X x Hd z m gt 5 amp ra r 00 c c t O 16 400 00 a NY Mm N 9 rerr 5 x xx 2 oooxono lt 0 0 20000 EEFEE GOD QN 90 mx xxx H3MOd 1C1 BU4094BF 2 1 5010 IC5 KCD04 IC6 KCD05 IC7 KCA04 IC8 KCB11 04 10 5 17 IC11 KCH05 01 35 184 5 Q2 3SK131 V12 03 8 20 25 2714 Q4 DTA114YK 05 6 07 123 Q7 DTC143EK 010 25 1362 011 25811195 Q12 DTC144WK 013 14 21 25 2712 Q15 17 DTC144EK 018 2501757 019 25 208 Q22 FMG1 023 25019028 Q24 28J106 GR 1SV164 02 5 7 1SV166 011 12 155184 D13 DAN235 K 014 155181 D15 MI407 D16 MI308 017 18 155226 D19 DSA3A1 G m G lt 158 157 TM 742 A 742 942 x x Signal line Control line POWER MODULE ICIO S AVIT 144 DRIVE 235K ois f DAN 1 8 SCHEMATIC DIAGRAM 13 4v1 R55 470 DEV 144M TX RX UNIT X57 3580 XX TS MIC AMP LIMITER
35. R92 0670 05 RK73FB2A222J Description CUSHIQN CN1 CN2 CUSHTON VCO INSULATION SHEET APC TR FORMED PLATE XTAL FORMED PLATE VCG D CUSHION VCO CUSHTON VCO NON WOVEN FABRIC SPACER FILTER CERAMIC FILTER CFWM455F COIL SMALL FIXED INDUCTOR 0 15UH COIL 1ST IF C8ILC2 5T SMALL FIXED INDUCTOR O 33UH COIL 10 5T CGILC6T CSILC6T COIL 9 5T CQIL 4 5T SMALL FIXED INDUCTGR 82NH SMALL FIXED INDUCTOR 10UH CRYSTAL RESGNATGR C12 8MHZ CRYSTAL RESONATOR 10 245MHZ CRYSTAL FILTER 10 7MHZ SCREW MODULE BRAZIER HEAD TAPTITE SCREW ANT HEAD TAPTITE SCREW FLAT CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP 20 20 20 20 20 20 20 mco 30 1 10W 1 10W 1 10W 1 10W 1 10W 10K 33K 270K 100 10K 100 10K 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W ULLAL C4 Cy Oy Cy Oy 1 10W 1 108 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 85 42 A 742 E 942 86 x New Parts Parts without Parts No are not supplled Les articles non mentlonnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert Ref No Address Parts No SREB m Bh 144M TX RX UNIT X57 3580 XX Description Bh amp RK73FB2A1013 CHI
36. TM 742 A 742 942 CIRCUIT DESCRIPTION Squelch volume input The squelch volume for each band works by convert ing the voltage output by dividing 5 V applied to the variable resistoratthe analog portofthe microprocessor and so reads the rotation angle If the rotation angle changes acommand corresponding to the value sent to the control unit CONTROL UNIT RESET BACKUP CIRCUIT The 1 level pulse with duration of approximately 20ms is outputted by the RESET IC IC1 2 and the RESET MICROPHONE KEY INPUT CIRCUIT The UP DOWN keys and the function keys of the microphone are connected to the analog inputs of the microprocessor and the various functions are operated by the voltage applied when the key is ON Figure 37 9014 N UP DOWN CALL VFO MR PF Fig 37 Microphone key input circuit Fig 36 Reset Backup Circuit SW Q5 when the power is turned ON The CPU is reset by means of this pulse When the power is turned OFF the voltage drop of the 13 8V line is detected Q6 of the backup circuit turns OFF 09 turns ON and the IRQ terminal is stuck at the level a result the CPU gets in the backup oper ation At that time the voltage VDD is supplied by BA vis R24ID1 Moreover the backup circuit is also connect ed to the clock IC IC6 S 3520CF and it gets in the access inhibit backup state when the 1 level is en tered Refer to the Port List for IC6 To IC2 6 Vcc
37. bit 1 PD SOC There is resistance 1 No resistance 0 13 BAND C squeich level adjustment bit 2 0 There is resistance 1 No resistance Q7 12 BAND C squelch level adjustment bit 3 Q There is resistance 1 No resistance BAND C squelch level adjustment bit 4 PD__SQC4 0 There is resistance 1 No resistance Shfit registor B4094 Circuit Terminal name Function PD SOCO All bits are stuck at H IF when MONI ON Data coming from the panel are inverted when they enter the shift register CONTROL UNIT X53 346X XX SHIFT REGISTER C 4094 BUILT INTO IC114 Port Data Name Function For dimmer level adjustment Bit O Refer to the table below for the logic Data coming from the panel are inverted when they enter the shift register Port logic versus dimmer level correspondence lit Dimmer level Q3 bit 2 Q2 bit 1 Q1 bit O di 0 1 0 27 TM 742 A 742 E1942 PORT SPECIFICATION LIST CIRCUIT DESCRIPTION CONTROL UNIT 53 346 HD6433388A04F P84 TXDI RQ3 P86 SCKIRQS P85 RXDI RQ4 79 78 69 5 05 68 P344 RES 60 XTAL 59 P61 FTOA EXTAL 58 P62 FTIA 1 P63 FTIB 56 Mi L55 pesto 54 Pee FTOB IRQS UM 53 P52 SCK0 32 Aves PSI RXD0 Top View PSO TXDO 50 1 Vis PT2 AN2 P97 WAIT 48 P73 AN3 96 P74 AN4 P95 AS 46 PTS ANS PO4WR 45
38. clockwise 742 742 942 ADJUSTMENT Transmitter Section Adjustment Measurement point Adjustment point equipment 1 Maximum 1 Frequency 28 850 MHz Powermeter 52 W or more power check Transmit Ammeter 2 High power 1 Frequency 28 850 MHz 50W adjustment ransmit check Specification 5 2 Frequency 28 000 MHz 44 W or more Transmit 3 Frequency 29 640 MHz 44 W or more Transmit 1 Frequency 28 850 MHz Powermeter Rear TX RX 4 Adjust 11 6 W Transmit panel 2 Frequency 28 000 MHz E 9 5 W or more Transmit Adjust 3 Mediurn power adjustment check 3 Frequency 29 640 MHz Transmit 3 0 8 0 W 1 Frequency 28 850 MHz Powermeter Rear ANT Transmit panel 2 Frequency 28 000 MHz Transmit 3 Frequency 29 640 MHz Transmit TX RX VR2 4 4 KHz 200 Hz panel 4 4 KHz Check 2 2 to 3 6 kHz Transmit 4 Low power check 3 0 8 0W i 3 0 80 W DC detector 1 Frequency 28 850 MHz Oscilloscope AG AG 1 kHz 50 mV K P M 5 Deviation adjustment check Filter Transmit 2 Frequency 28 050 MHz AG 1KHz 5 0 mV P M 2 8 mV E Filter 25 15K 6 Frequency 1 Frequency 28 850 MHz Frequency Rear ANT TX RX TCT Adjust 28 850 MHz 20 Hz adjustment Transmit counter panel Powermeter L1 L5 L4 L3 o cz Fig 60 28 MHz Band adjustment Component layout upper view 130 7
39. i i i i 3 nqow JAIXO 33d I I I i XX 009 L5x i i i i i 1 7 519 1 1 1670 Aug Z i 201914 i d OF gt D 1 I 1 1 i i 5 L s t 5 5 i i i KX 821 921 S8 0 i 1 renum DIN 8P9Z 066 159 I WALA dH WALA dV H i ozo TUYA 0 I 521 LO b CH H Q AWEZ i OIN i i 0121 821 AES 17d AWOL Cas z I i DIN i i 8P9Z AZL O 085 lt i 9 5 XL AJQ 2H3It 18 DSS JIW3 sayeads au 01 payaULOD 01300 10A JV 19089 8 9 10 s jag JY Z 4111070 e BIA JUIOd 95 eu Bunoeuuoo Aq paujeyqo QvNIS 10 arg 95 L AWSS LO 51 O 21 21 LO 8 v E Ep E CU l y LNVDOZL En L I 221 dl 5 91 009
40. ipaddesip pinous asion Pinoys ASNE pue pinoys yojands uonisod Buiso 2 01 TOS 195 Ino 08 pinoys ASng 00 11 00 8 uonisod 1044409 uo 06 8431 jeubis igpg os ndino 02 s nd no OSS 41 955 5206 931 suo uay uo 06 531 ey os 1sn py aow QNYNIS 8021 alow JO QNVNIS 8PZL aow 10 QNVNIS GPZL SS9 JO S UU UJIXeu SI s jejeunjoA Buipeai J31 uullOA 1000 uOnJo1sip g 955 2432 2H 8Pv1 3ndino OSS 0757222 Aouanbal4 7 340 andino OSS ZHN 096222 Aouanbay Tigpzz andino OSS zHIN 096222 ASusnbaj ZHYE uonepnpol andino OSS 2HIN 098222 2HN Tigps andino OSS ZHN 086 6Zz A0uanba y ZHXE ZH indino 955 2 070612 AQuanbaly 955 91025011280 ZHYE 267 uonejnpojw Tigp6 indino oss uomoisiQ ZHN 0907722 ousnba 2432 9002501050 ZHNL 18209 indino 955 911 Xu X1 dS 1X3 uomoisiqQ ZHN 090772 ouenbels 9 I908H ZHYE ZHY uonei npow Jeueg
41. 05 E23 0619 05 E23 0619 05 PHONE JACK TERMINAL TERMINAL F05 1531 05 FUSE F10 1446 04 SHIELDING PLATE F10 2010 03 SHIELDING CGVER F10 2012 04 SHIELDING CASE VCG PLL F20 1008 04 INSULATION SHEET APC F51 0017 05 FUSE 15A G02 0600 14 ELAT SPRING THERMAL SW G02 0705 04 FLAT SPRING 602 0715 04 LEAF SPRING APC TR G02 0718 04 FLAT SPRING VCQ 609 0426 05 SPRING DC CORD G11 0654 04 CUSHION VCO A TM 742 K P M M2 E E2 E3 B TM 942 K P M 742 A 742 E 942 ae ss PARTS LIST Parts without Parts No are not supplied Les articles non mentlonnes dans le Parts ne sont pas fournis Teile ohne Parts No werden nicht gellefert 144M TX RX UNIT X57 3580 XX Ref No Address tou 3G 3G Parts No F 611 0655 04 G11 0660 04 611 0661 04 G13 0841 04 G13 1325 04 G13 1337 04 G13 1349 04 653 0508 04 130 0564 05 L79 1013 05 L72 0372 05 L34 4252 05 L40 1582 19 L34 4251 05 L34 1185 05 L40 3382 19 L34 1239 05 L34 0895 05 L34 0742 05 L34 0908 05 L34 0499 05 L40 8272 48 L40 1001 19 L77 1405 05 L77 1473 05 L71 0228 05 09 2077 05 N87 2606 46 N88 2606 46 RK73FB24103J RK73FB2A333I RK73FB2A274J RK 3FB24A101J RK73FB2A103J RK73FB2A101J RK73FB24A103J RK73FB2A473J RK73FB2A104J RK73FB2A683J RK73FB24823J R92 0670 05 RK73FB2A470J RK73FB2A102J RK73FB2A152J RK73FB24A471J RK73FB2A101J RK73FB2A103J RK73FB2A473J RK73FB2A103J R92 0670 05 RK73FB2A394J
42. 10 to 14 W Rear ANT TX RX VR2 Adjust in the 4 0 to 5 0 KHz Panel higher or direction 4 2 KHz m 1 Maximum power check Frequency 136 000 MHz 145 980 MHz 147 980 MHz 1 Power adjustment check Transmit 2 High power adjustment Transmit 3 Medium power adjust ment Transmit 4 Low power check Transmit 1 Frequency 145 980 MHz AG 1 kHz 50 mV P M 28 mV Filter 25 DC detector Oscilloscope 2 Deviation adjustment check Transmit 2 Frequency 145 980 MHz AG 1 KHz 5 0 mV M 2 8 mV Transmit 3 Tone check 1 Frequency 144 980 MHz DC detector Rear ANT Check 0 5 to 1 5 KHz Tone On Oscilloscope Panel Transmit 4 Protection check 1 Frequency 147 980 MHz Antenna open Transmit re a Frequency TX RX TC1 145 980 MHz 100 Hz counter Powermeter 5 Frequency adjustment 1 Frequency 145 980 MHz Transmit Note Use adjustment tool with ceramic plastic tip 1 5 mm square for L1 through L4 Fig 57 144 MHz band adjustment Component layout upper view 124 42 AJ 42 E 942 ADJUSTMENT e 430 440 MHz Band TM 742A E TM 942A UT 440S Measurement Measurement point Adjustment point Test Terminal equipment Common Section adjustment uni feats 1 Lock 1 Frequency 468 000 MHz Digital TX RX TP2 Check the lock on Receive voltmeter voltage chec Receiver S
43. 10K TRIM POT 10K 579 0401 05 THERMAL SWITCH 95 C 15 164 DIODE 1SV166 DIGDE 15 164 DIODE 1SV166 DIQDE 15 164 DIODE A TM 742 K P M M2 E E2 E3 B TM 942 K P M ee TM 42A 742 942 x Parts Parts without Parts No are not Les articles non mentionnes dans le Parts No ne sont pas fournis 144M TX RX UNIT X57 3580 XX Telle ohne Parts No werden nicht gellefert TX RX UN 430 440M TX RX UNIT X57 3590 XX Ref No Address New Parts No Part emus 07 Description 1SV166 DIODE 155184 DIODE 155184 DIODE DAN235 K DIODE 155181 DIODE 407 DIQDE MI308 DIODE 155226 DIODE 1 DIODE BU4094BF IC SHIFT STORE REGISTER IC IC LOW SATURATION REGULATOR IC FM IF IC AM IF IC MIC AMPLIFIER XRU4094BF LASO10M KCD04 KCD05 KCA04 IC DRIVER IC APC IC POWER MODULE FOR 144 2 IC 144MHZ VCO PLL FET KCB11 KCCO4 5 17 05 35 184 5 TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR 3SK131 V12 2502714 7 DTA114YK DTC123JK DTC143EK 2SA1362 Y TRANSISTOR 28B1119 S TRANSISTGR DTC144WK DIGITAL TRANSISTGR 2502712 7 TRANSISTOR DTC144EK DIGITAL TRANSISTGR 2SD1757K TRANSISTOR 25K 208 Y FET 25 2714 TRANSISTOR 28C2712 Y TRANSISTOR FMG1 TRANSISTOR 2SD1902R TRANSISTOR 28J106 GR FET 430 440M TX RX UNIT X57 3590 XX A10 1316 01 CHASSIS
44. 1299 99 MHz This signal is amplified by a straight amplifier then transmitted Fig 18 Frequency Configuration 1200 TX RX Unit Receive Signal Channel e Outline The received signal from an antenna is passed through a low pass filter in the transmission final stage and sent through a transmission reception selection diode switch to the receiving front end The signal is then amplified to high frequencies by a microwave GaAs gallium arsenide FET and sent to a dielectric filter The unwanted components of the signal are eliminated by a microwave transistor in another stage and the dielectric filter The resultant signal is input to the first mixer The front end block is matched by a microstrip line to ensure high sensitivity and high reliability A GaAs FET is used in the first mixer to obtain a good two signal characteristic This signal is mixed with the first local signal froma PLL circuit by the first mixer and converted to a first intermediate frequency of 59 7 MHz The unwanted near by signal components are eliminated by a two stage MCF The resultant signal is produced as a first intermediate frequency signal The first intermediate frequency signal is amplified and input to FM IF HIC IC2 KCD04 This signal is then mixed with a second local oscillation frequency of 59 245 kHz to produce a second intermediate frequency of 455 kHz The intermediate frequency signal is passed through a ceramic filter to obtain a sharp characte
45. 1955 19 9 andino 955 9 11 INV ZHW 0987222 quewidinba 3991 uonipuo puwa 1uausnipy 201 841 42945 uawainseay yojanbs 40842 uiBuens jueuasn pe J919uJ jeubis yoayo 50392 uoniolsiq jueunsnipe 499 1U ssedpueg jueunsn py J 1 un oA Jeu amp ig ZHN 0007512 Aouanbai4 3ueuidinba 3591 3usunsnipy Juawaunseayy 4201 jueunsn py 296 SOZZ LN pued ZHN OCT 1N3N1Shf v 742 AF42 E 942A BOARD VIEW 742A 0 21 742A M 0 22 742A 2 CONTROL UNIT X53 346X XX 0 11 IC1 HD6433388A04F 102 LC3564PML 12 IC3 TA78LO6F IC4 TC74HC133AF IC5 TC74HCOOAF IC6 S 3520CF 1C7 HD74HC165PF IC8 BU4066BF 1C9 103 NJM4558E IC10 TC35219F 1C11 LC7385M 2 E 2 o GND INPUT L78LRO5B FA 1 0404719 26 IC2 L78LR05B FA 103 6 203 206 7 4511 1C201 202 M8M5265GS V1K 1C204 TC74HC73AF IC205 NJM7BLOSUA 01 25 1745 6 7 02 2581119 5 Q3 101 DTC114EU Q4 5 DTC144EU D1 MA112 02 720 D3 4 830 2025 05 0101 105 830 2048 05 0107 112 114 830 2053 05 e
46. 2006 45 0 2008 45 N80 2605 45 NI4 0552 05 OR x 5 p PAIN 14 32 PAS 2 SM Se Se gt Nip SS 4 lt lt 1 Downloaded by RadioAmateur EU TM 742 742 E 942 A EXPLODED VIEW TM 742 A 742 942 EXPLODED VIEW TX RX UNIT H 144 430 440 U M26x6 F Tap 88 2606 46 2 at u lt 203 215 Y 216 27 Thess WN 2 209 213 e N 14 b 430 440 P A W 5 5 8 1 9 2077 05 gt 1 9 2179 05 N 2 6 6 Br Tap 87 2606 46 2 6 8 N87 2608 46 k 742 A 742 E 942 SUB INSTRUCTION MANUAL B59 0466 000 23 PACKING FIXTURE H11 0857 14 H25 0750 04 INSTRUCTION MANUAL B62 0287 00 B62 0345 00 FRANCE MICROPHONE MIC T91 0397 05 DC CORD 30 3034 05 3 SPANNER W01 0414 04 92 BAG H25 0029 04 63 MIC HOOK J20 0319 24 67 PAN HEAD TAPPING SCREW N46 3010 46 PACKING UNIT T42A P M M2 I INSTRUCTION MANUAL 24 942A P M B62 0287 00 T42A K 942A K 6I PACKING FIXTURE H11 0856 14 25 INSTRUCTION MANUAL 23 862 0288 00 48 SUB INSTRUCTION MANUAL PROTECTION BOARD B59 0466 00 813 0861 04 22 WARRNTY CARD B46 0410 30 BRACKET 429 0454 03 PROTECTION BAG 65 25 0723 04 66 20 ITEM CARTON BOX UPC CODE LABEL 52 0370 04 742 B44 2163 04 H52 0371 04 742A E2 M M2 H52 0372 04 742E
47. 28 1 ceu On au 0 azz Nes uo N ize 5 l 5 x x 49 2 612 FH o 4 i a 88 x 3 wx vel H 59 o as we 900 lt on seid z Ko 2 945 9219 5 12 a LEG gt 5 10 go 58 22 4 x S 4 492 4 498 scs L 4 2 102 5 5 ga ur hes gt ole r 7 aJ B2ZASI 9a Woo lo vip 8 z x lags 5 H o2 On 29 5 ASZ 862 9 5 sa 3 NOOI os wk a 77 B22ASI m 912 053 qe a x m 2o o 62 ri hs 5 E o 1 t 1212 10 a E M 107 25 m gt 1 ae 8 x 9o 155 gt lt e 0 dot x lt n 29 5 E E E 8 z 10 262 x m o PT d at lt 49 10 z 7 163 PC BOARD VIEW M 742 742 E 942 28M TX RX UNIT X57 3790 01 28M TX RX UNIT X57 3790 01 Component side view m lt z gt 7 u IC1 BU4094BF XRU4094BF IC2 KCH09 IC3 KCA04 IC4 KCB16 IC5 KCC04 IC6 KCD04 IC7 LA500
48. 300 MHz or more DC power supply Voltage 10 to 17 V variable Current 12 A or more Power meter Power measurement ranges 100 W 50 W and 15 Ww Input impedance 50 ohms Measurable frequency 1 300 HMz AF vacuum voltmeter AF Input impedance 1 M ohms or more Voltage range FS 1 mV to 30 V Measurable frequency 50 Hz to 10 kHz AF generator AG Output frequency 100 Hz to 10 kHz Output voltage 0 5 mV to 1 V Linear detector Measurable frequency 1 300 MHz Spectrum analyzer Measurable frequency 1 300 MHz 10 Directional coupler 11 Oscilloscope Use a high sensitivity oscilloscope with horizontal input socket 12 SSG Use an SSG that produces a frequency of 20 to 1 300 MHz with amplitude and frequency modulation Output level 0 1uV to 100 mV 13 Dummy resistor 122 Use an 8 ohm resistor exceeding the rated value in each band 14 Noise generator Use a noise generator whose output contains a high frequency component of more than 1 300 MHz near ignition noise 15 Sweep generator Use a sweep generator that can sweep the 1 300 MHz band 16 Tracking generator Preparation e Setcontrols to the position shown in Table 23 unless otherwise specified POWER SW AF VOL VR SOL VOL VR Table 23 When viewed from the front of the set RO Transmission band detection output 100 mV 10 k ohms Fig 55 Microphone Socket on Front Panel e Use an insulated tool such as a plastic
49. ANT CABLE ANT CABLE DC CABLE PIN ASSY 12P PHONE JACK RF COAXIAL CABLE RECEPTACLE SHIELDING SHIELDING SHIELDING SHIELDING FUSE 15A PLATE PLATE PLATE CASE VC8 PLL FLAT SPRING DB TR FLAT SPRING THERMAL SW EARTH SPRING EARTH SPRING SPRING DC CORD CUSHIGNCCN1 CN2 CONDUCTIVE RUBBER MCF CUSHISN VCG INSULATION SHEET DB TR CUSHIGNC12 8MHZ XTAL CUSHION VCO TM 742 K P M2 E E2 942 K P 89 42 A 742 942 x New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert 430 440M TX RX UNIT X57 3590 XX 90 613 1351 04 653 0508 04 J42 0471 04 L79 1013 05 L72 0372 05 L40 1872 80 L40 1572 48 L79 1016 05 L79 1017 05 L79 1017 05 L79 1018 05 L40 2772 48 L40 3372 48 L40 3372 48 L40 2272 48 L34 4250 05 L40 2272 48 L34 1238 05 134 1185 05 L34 1032 05 L34 1226 05 L34 1238 05 134 1226 05 L40 1872 48 L40 1001 19 L77 1445 05 L77 1405 05 171 0411 05 109 2077 05 N87 2606 46 N88 2606 46 RK73FB2A104J RK73FB2A3333 RK 3FB2A101J RK 3FB2A470J RK73FB2A220J RK73FB2A471J RK73FB2A223J RK73FB2A102J RK73FB24A102J RK73FB24221J RK 73FB2A222J RK73FB2A470J R92 0670 05 RK73FB2A122J RK73FB2A334J RK73FB2A102J RK73FB2A471J RK73FB24A473J RK73FB24223J RK 73FB2A182J RK73FB2A103J RK73FB24182J Description
50. B51 8192 00 S 1094 Knob S Q L K29 4808 04 32060 EM j Knob Ass y VOL Downloaded by RadioAmateur EU KENWOOD 42 742 E 942 OVERVIEW List of Destinations Mode Destination Destination code TM 742A K TM 942 A A TM 942A Canada ___ umapi Other countries Units for Each Model and Destination e unt fete unt x533460 21 Je fle unit x53 3460 22 el unt 63346271 contol unit x533462 72 fof display unit x54 3130 11 o o o o o o o o o o 28 _ x57 aeooo amem 7358012 2 220 xs7 3590 12 o e 57 3690 22 7359272 12 xs7 seoo 11 1 BAND UNITS Any of the following optional band units may be installed in the TM 742A 742E The same instructions apply for the Tri Bander as for the Dual bander BEEN OPTIONAL BAND UNIT TM 742A U S A Version UT 288 0 505 UT 220S UT 1200 T
51. BOX OUTER PACKING CASE RING SCREW SET TX RX UNIT 28MHZ SOW 0 285 742 K P 2 E 2 942 K P M 113 TM 742 A 742 E 942 x New Parts PARTS LIST Parts without Parts No are not supplied UT 50S Les articles non mentionnes dans le Parts No ne sont pas fournis UT 220S Telle ohne Parts No werden nicht gellefert UT 1200 Ref No Address PRES E B41 0686 04 B42 2437 04 B42 2454 04 B42 3488 04 B62 0089 10 E23 0657 04 611 0665 04 H10 2726 03 H13 0855 04 25 0029 04 25 0760 04 52 0133 04 62 0113 04 J69 0325 05 N99 0355 15 57 3800 01 B41 0686 04 42 2437 04 42 2454 04 B42 3488 04 B62 0089 10 23 0657 04 G11 0665 04 10 2726 03 13 0855 04 H25 0029 04 25 0760 04 52 0136 04 62 0116 04 J69 0325 05 N99 0355 15 X57 3810 10 B41 0686 04 B42 2437 04 B42 2454 04 B42 3488 04 B62 0089 10 E23 0657 04 G11 0665 04 H10 2726 03 H13 0855 04 H25 0029 04 114 Description CAUTION LABEL ADJUST LABEL S NQ UNIT LABEL S NO ITEM CARTON BOX LABEL FREQUENCY INSTRUCTION MANUAL TERMINAL CABLE POLYSTYRENE FOAMED FIXTURE PROTECTION BOARD PROTECTION BAG 60X10 PROTECTION BAG 200X350 ITEM CARTON BOX OUTER CARTON BOX 9 RING SCREW SET TX RX UNIT 50M 504 UT 220S CAUTION LABEL ADJUST LABEL S NG UNIT LABEL S NO ITEM CARTON BOX LABEL FREQUENCY INSTRUCTION MANUAL TERMINAL SHEE
52. BUSHING J30 0583 14 J42 0471 04 L79 1013 05 FILTER L72 0372 05 CERAMIC FILTER CFUMASSF L34 4283 05 COIL 7 5T L34 4284 05 COIL 10 5T L34 4285 05 CQIL 1ST IF L40 6891 19 SMALL FIXED INDUCTOR 6 8UH L40 1001 19 SMALL FIXED INDUCTGR 10UH L34 1355 05 COIL 10 5T L40 6882 19 SMALL FIXED INDUCTSR O 68UH L40 3982 19 SMALL FIXED INDUCTOR O 39UH L34 1361 05 COIL 4 5T L34 1354 05 COIL 8 5T 134 1352 05 COIL 8T 134 1363 05 COIL 2T L34 1351 05 COIL 7T L34 1364 05 COIL L34 1356 05 COIL L34 1355 05 COIL L33 0741 05 CHOKE COIL L34 1355 05 COIL 10 5T SMALL FIXED INDUCTGR S 6UH L40 5691 19 L40 3982 19 SMALL FIXED INDUCTGR O 39UH L40 1001 19 SMALL FIXED INDUCTOR 10UH L40 1892 19 SMALL FIXED INDUCTOR 1 8UH L77 1465 05 CRYSTAL RESGNATGR 9 285MHZ CRYSTAL FILTER 8 83MHZ L71 0422 05 1H 2H 3G 3H 2H 1G 1H SCREW x3 BRAZIER HEAD TAPTITE SCREW BRAZIER HEAD TAPTITE SCREW FLAT HEAD TAPTITE SCREW N09 2179 05 N87 2606 46 N87 2608 46 N88 2606 46 RK73FB2A472J CHIP R 4 7K J RK73FB2A103J CHIP R 10K J 1 10W RK73FB2A472J CHIP R 4 7 J 1 10 RK 3FB2A680J CHIP R 68 J A TM 742 K P M M2 E E2 E3 B TM 942 K P M TM 742 742 E 942 PARTS LIST Parts without Parts No are not supplied Les articles non mentlonnes dans Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert 28M TX RX UNIT X57 3790 01 No Address Parts No E 9
53. C 68PF J CC73GCH1H151J CHIP C 150PF J CC73GCH1H151J CHIP C 150PF J 1 103 CHIP 0 01UF K CK73GB1H102K CHIP C 1000PF K CK73FB1E103K CHIP C 0 01UF K CC73FCH1H560J CHIP C S6PF J CC73FCH1H680J CHIP C 68PF J CC 3FCH1H040C CHIP C 4PF CC73GCH1H181J CHIP C 180PF J C05 0345 05 TRIMMING CAP 10PF E22 0673 04 TERMINAL BOARD E30 3009 15 ANT CABLE E40 5461 05 PIN ASSY 12P E11 0442 05 PHONE JACK 23 0465 05 TERMINAL TP A TM 742 K P M M2 E E2 E3 B TM 942 K P M 99 TM 42A 742 942 100 x New Parts PARTS LIST Parts without No are not supplied Les articles non mentionnes dans fe Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert Address Parts No 2H 28M TX RX UNIT X57 3790 01 Description E RS m m F10 2006 14 SHIELDING PLATE CFINAL F10 2009 04 SHIELDING PLATE L TYPE 1G F10 2010 03 SHIELDING F10 2012 04 SHIELDING CASE VCG PLL F12 0421 04 CONDUCTIVE SHEET 25 4X43 CONDUCTIVE SHEET 25 4X15 INSULATING BRARD APC INSULATING BOARD 60X22 12 0422 04 20 1008 04 20 1090 04 FLAT SPRING THERMAL SWITCH FLAT SPRINGCAPC TR FLAT SPRING VCQ FLAT SPRING FRGNT CONDUCTIVE RUBBER CN1 CN1 55X8 602 0600 14 602 0715 04 602 0718 04 602 0720 04 011 0655 04 INSULATING SHEET APC CUSHIQN XTAL CUSHION VCO CUSHTON VCO G11 0661 04 613 0841 04 613 1319 04 613 1337 04 SPACER FINAL DC C RD
54. CHIP C 27PF J CC73FCH1H120J CHIP C 12PF J CK73EF1C105Z CHIP 1 0UF Z CK73FB1E103K CHIP C 0 01UF K CK73FB1H102K CHIP C 1000PF K CK 73FB1E103K CHIP C 0 01UF K CEO4NW1E100M ELECTRO 100 25WV CEO4NW1A330M ELECTRS 33UF 10WV CK73FB1E103K CHIP C 0 01UF CEO4NW1A221M ELECTRO 220UF 10WV CC 3FCH1H100D CHIP C 10PF D CK73FB1E103K CHIP C 0 01UF K CC 73FCH1H150J CHIP C 15 2 7 1 103 0 01UF K CEO4NW1C101M ELECTRO 100 7 1 103 0 01UF CK73FB1E223K CHIP C 0 022UF CK73FB1E103K CHIP C 0 01UF 7 1 1052 1 0UF CEO4NW1E100M ELECTRO 1QUF CK73FB1E103K CHIP C 0 01UF CK73EF1C105Z CHIP C 1 0UF CK73FB1E223K CHIP C 0 022UF CK73FB1H681K CHIP 680PF CC73FCH1H221J CHIP C CK73FB1E103K CHIP C 0 01UF CK 3FB1H102K CHIP C 1000PF CEO4NW1E330M ELECTRO 33UF SWV CK73FB1E103K CHIP C 0 01UF CM73F2H391J CHIP C 390PF CM 73F2H820J CHIP C 82PF C93 0509 05 CERAMIC 0 0068UF CC73FCH1H390J CHIP 39PF K K K 2 2 K z K K 220PF J K K 2 K J J J J J C93 0509 05 CERAMIC 0 0068UF A TM 742 K P M M2 E E2 E3 B TM 942 K P M TM 742 742 E 942 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentlonnes dans Parts ne sont pas fournis Teile ohne Parts No werden nicht gellefert Ref No Address New Parts No Partsi n NE 50 TX RX UNIT X57 3800 01 Description Bh a R C89
55. CONNECTOR FOR INSIDE CNS 40 5343 05 PIN CONNECTOR FOR INSIDE PIN CONNECTOR FOR INSIDE CN101 106 E40 5452 05 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 77 TM 742A 742 E 942 PARTS LIST Parts without Parts No are not supplied Les articies non mentlonnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert CONTROL UNIT X53 3460 XX Ref No Address New Parts No Parts SMES ME NE 5 40 5224 05 40 5408 05 40 3299 05 11 0448 05 08 0876 05 7 0329 05 F53 0095 05 G11 0691 04 G13 1396 04 J30 0563 05 L7808CV L92 0131 05 L77 1516 05 L77 1441 05 L78 0301 05 L78 0089 05 90 0729 05 90 0727 05 RK73FB2A102J RK73FB2A473J RK73FB24102J RK73FB2A472J RK73FB2A102J RK73FB2A154J RK73FB2A223J RK73FB24A102J RK73FB24A332J RK73FB2A561J RK73FB2A392J RK73FB24A822J RK73FB2A183J RK73FB2A104J RK 73FB2A182J RK73FB2A221J RK73FB2A123J RK73FB24823J RK 73FB2A224J RK73FB2A184J RK73FB24A105J RK73FB2A472J RK73FB2A103J RK73FB2A473J RK73FB2A472J RK73FB2A103J RK73FB2A474J RK73FB24A563J RK73FB2A474J RK73FB2A472J RK73FB2A334J RK73FB2A684J RK73FB2A473J Description PIN CONNECTOR FOR INSIDE PIN CONNECTOR FOR INSIDE PIN CONNECTOR FOR INSIDE PHONE JACK RECTANGULAR RECEPTACLE CONNECTING WIRE FUSE 1 2A AUXILIARY PART FORMED PLATE SPACER RESONATOR CORE CRYSTAL RESONATOR CRYSTAL RESONATOR RESONATOR 3 5795MHZ RESONATOR 480KHZ
56. Figure 44 shows the data configuration The L level obtained when the tone is detected from the CTCSS unit and its coincidence is confirmed is entered in P81 of the microprocessor and then the squelch is opened Each CTCSS unit is able to cope with 3 bands This operation is executed by switching the low frequency sig nal outputted by the band unit Figure 43 abit MSB_LSB P43 D7 P80 ET P Fig 42 CTCSS Data Transfer Format LIST OF PORTS OF IC11 LC7385M Function description BandA Band B Band C IC108 109 BU4053 BF Fig 43 Tone frequency selection data of CTCSS FX365 foo ee esos Example 88 5 HZ H H H L L DTMF unit Fig 44 CTCSS Data Configuration INPUT OUTPUT OF DTMF Data to DTMF is outputted by P66 67 and P60 to P63 of the microprocessor P60 to P63 are the data in the case of the encoder and tones corresponding to each data are outputted from the TONE terminal of IC10 TCD35219F while P66 is stuck at H As for the decoder the detected signals correspond ing to each band are switched at IC108 109 in the same way as in CTCSS and after that it passes through the analog switch IC8 and is entered in the DTMF decoder IC11 LC7385M When an effective tone is detected the terminal STD is stuck at and P67 of the microprocessor is enabled As a result data are entered in P60 to P63 and the coincidence with the preset 0755 codes is checked by the mi
57. O O CHIP CHIP CHIP CHIP CHIP CHIP CHIP ELECTRO CHIP TAN ELECTRO CHIP TAN ELECTRO CHIP CHIP CHIP CHIP CHIP CHIP CHIP ELECTRO CHIP C CHIP C ELECTRO ELECTRO CHIP C 3PF 1000PF 0 01UF 0 5 56 0 5PF 12PF 12PF 1000PF 6PF x 1000 6 0 0108 0 01UF 3 0PF 1000PF 0 01UF 15PF 1000PF 0 10UF ACA C 1 00 0 01UF 47UF 0 68UF 47UF 0 47UF 47 0 0 01UF 1000PF 1 0UF 15PF 1000PF 20PF 1000PF 47UF 1000PF 0 01UF 10UF 33UF 0 01UF A TM 742 K P M M2 E E2 E3 B TM 942 K P M 109 TM 42 742 E1942 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert C67 C68 70 671 C74 C75 C76 c77 c79 c81 2 C83 C84 C85 C86 C87 C88 C89 C90 093 C94 C95 C96 97 C98 699 100 c101 102 C103 C104 C105 C106 C108 C109 110 C111 C112 6113 C114 115 C116 C119 120 127 128 129 C130 C131 C133 C134 C135 137 C140 TC1 203 2 J1 J2 110 CK73FB1H102K CC73FCH1H100D CK73FB1E103K CK73FB1H102K CK73FB1H223K CEO4NW1C101M CK73EF1C105Z CK73FB1H102K CK73EF1C105Z CC458L2H180J CK73FB1H102K 45 2 102 4551 2 040 CC73FCHIHORSC CC73FCH1HORSC CC73FCH1H020C CC45SL2H220J CC458L2H180J CK73FB1H102K CC73FCH1H
58. P__BEEP the Beep sound Power switch 0 Power ON P SW 1 Power OFF Pow TMRIO P46 P__TONE Sub tone Clock synchronism signal output S3520Cf SCK Serial gt Parallel conversion HD74HC165F CTCSS Unit Clock P_CKSCK P50 TXDO P51 P52 P60 p 1 0 Panel microprocessor 51 Panel microprocessor SO Parallel Serial conversion HD74HC165F input Destination repeater function provided not provided FAN SW etc DTMF Data 04 01 P61 FTOA FTC1 Data 03 02 30 P63 FTIB P62 FTIA P_DTDA2 TM 742 742 942 CIRCUIT DESCRIPTION HD6433388A04F I O PORT LIST pCOM Back Circuit Terminal name Content DTMF Data 02 03 Data 01 04 DTMF detection 0 No signal 7385 10 1 Signal detected DTSS unit switching 0 Detection output 1 MIC DTMF tone generator TC35219 TOE 0 No output a Tone output receiver LC7385 TOE 0 High impedance EN 1 Enable Mic DOWN Port shared with RXD1 Mic UP CALL VFO Port shared with SCK1 BAND Unit A ALT input lS q BAND Unit B ALT input BAND Unit C ALT input BAND Unit A S meter mput BAND Unit B S meter input _ BAND Unit S meter input 31 TM 742 742 E 942 CIRCUIT DESCRIPTION HD6433388A04F PORT LIST P_CTCSS P_MMUTE KBSO CTCSS Unit Enable conenection check 0 CONNECT 1 N
59. Protection 1 Frequency 29 690 MHz Ammeter Check 12A or less check Antenna Open i Transmit LEL u do pinous uorenbs ndino 955 BSIMYDOIO 1eeddesip pinous asion IN 0009 105 ZH dn 1481 2 pinoys ASNg pue pt andino OSS pinous yojanbs ZHW Ot0 ZG Aduanbasy Z ino o8 pinoys Asng uonsod Buisojo 00 11 00 81 01 101002 2ndino 955 A9399 uonisod 105 94 195 3 ZHIA 07075 Aduanbaly uojenbs uo o6 5431 Jajew ZH 32840 2H L Tigp9 e iey os 1ndino sz andino 955 02 S indino OSS eu OSS isnipy ZHW 070 26 A9u nb i3 jeu6is 44508 11 u do euuajuv ZHIN066 S A0uanba g L yoeyo 4013933044 ZH3 lu uulsnlpe 5206 q31 suo L 1919uJ joueg 1ueunsn pe uau uo 5031 andino OSS ZH OZ F ZHN 00075 isnipy 121 seal ouanbseJj ZHN 000 zS Aou nb ij 9 ye Jeu os isnipy ZHW 09026 jeubis ZHI ZH L uongjnpoiw oz andino 955 30W JO 5 80 ZL ZHIN Aduanbaly 2 ZH L 6 andino 955 aow 10 QNVNIS ZL ZHIN 090706 A
60. RK73FB2A473J RK73FB2A154J RK73FB2A273J RK73FB2A152J RK 3FB2A221J R92 0670 05 RK73FB2A471J RK73FB2A103J RK73FB2A222J RK 3EB2B220J R92 0670 05 RK73FB2A102J RK 73FB24A562J RK73FB2A104J R92 0685 05 R92 0670 05 R92 0679 05 R92 1214 05 RK73FB2A103J RK73FB2A221J RK73FB2A473J RK73FB2A104J RK73FB2A472J RK73FB2A473J RK73FB2A103J RK73FB2A102J R12 6429 05 R12 6427 05 R12 6423 05 559 0444 05 HSK277 15 128 155184 MA862 155181 155184 155184 MI407 MI308 MA716 DSA3A1 155184 MA716 862 KCD04 KCA04 BU40948F XRU4094BF LASO10M KCC04 KCB14 M57788M KCB12 KCB13 430 440M TX RX UNIT X57 3590 XX Description CHIP R 47K J 1 10W CHIP R 150K J 1 104 CHIP R 27K J 1 10W CHIP R 1 5K J 1 10W CHIP R 220 J 1 10W CHIP R 0 OHM CHIP R 470 J 1 10M CHIP R 10K J 1 10W CHIP R 2 2K J 11109 CHIP R 22 J 1 8W CHIP R 0 GHM CHIP R 1 0K J 1 10W CHIP R 5 6K J 1 10W CHIP R 100K J 1 10W CHIP R 22 J 1 24 CHIP R 0 OHM CHIP R 0 OHM CHIP R 120 J 1 2 CHIP R 10K J 1 10W CHIP R 220 J 1 10W CHIP R 47K J 1 10W CHIP R 100K J 1 10 CHIP R 4 7K J 1 10W CHIP R 47K J 1 10W CHIP R 10K J CHIP R 1K J 1 10W TRIMMING 100 TRIM POT 47K TRIM POT 10K THERMAL SWITCH 90 C DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE IC FM IF IC MIC AMPLIFIER IC SHIFT STORE REGISTER IC IC LOW SATURATION REGULATOR ICCAPC ICC DRIVER IC POWER MGD
61. V TM 742 742 942 CIRCUIT DESCRIPTION voltage is applied to the collector 8T of Q11 An unlock circuit is activated only during trans mission The LD signal output from the PLL circuit is ORed with the signal at pin 4 of IC1 using 011 as shown in the figure the LD signal is set high during unlock Therefore no voltage appears at the collector 8T of Q11 and no transmission wave is output to the reception state 0 2205 220 TX RX Unit Frequency Configuration The 220 MHz unit incorporates a variable frequency oscillator VFO based on a phase locked loop PLL synthesizer system that allows a channel step of 5 10 12 5 15 20 or 25 kHz to be selected The frequency in the receive signal channel is mixed with a first local oscillation frequency of 189 175 1 94 17 MHz to produce 220 229 995MHz WV a first intermediate frequency IF of 30 825 MHz This frequency is then mixed with a second local oscillation frequency of 30 37 MHz to produce a second IF of 455 kHz This is called a double conversion system The signal in the transmission channel is produced by direct oscillation and is frequency divided by a PLL circuit amplified by a linear amplifier then transmitted MIC AMP Fig 14 Frequency configuration 13 TM 742 A 742 942 CIRCUIT DESCRIPTION 14 220 TX RX Unit Receive Signal Channel Outline The received signal from the antenna passes through a low pass filter in the fi
62. VOLUME BUZZER CIRCUIT The angles of the potentiometers of the various bands that are located on the panel unit are transformed to 5 bit data through A D conversion executed by the microprocessor of the panel unit and are sent to the microprocessor of the control unit These data are out putted by the 1 expander C101 to IC112 HIC as serial data Data are fetched at leading edge of clock IC112 CSA The buzzer sound heard when the key is pressed is outputted from the IC P44 of the control unit MIXed with the DTMF monitor output and is outputted to IC112 IC112 carries out the LEVELIMUTE processing of the audio signal in conformity with the received data and after that the signal is outputted to the speaker chan geover switch IC106 Figure 51 The volume level is set for the speaker output and buz zer sound sound of each band by using the 2 electronic potentiometers 87032 built into IC112 The data have 28 bit composition with 20 bits used to set the level The remaining 8 bits are used as com mands and other applications The data are fetched at the trailing edge of the clock Figure 52 Fetched in the latch by the leading edge Fig 52 742 A 742 E 942A CIRCUIT DESCRIPTION e SPEAKER SWITCHING CIRCUIT Four speaker jacks are provided in total one in each band unit rear and one in the control unit side As for the functions of the various terminals the speaker
63. maximum output point Guaranteed attenuation within 100 kHz of 455 matcing impedance 2 0kQ Table 14 Ceramic filter CFWM455F L72 0372 05 220TX RX unit CF1 Guaranteed attenuation 35 dB or more Signal strength meter The signal strength meter output voltage of FM IF HIC IC5 KCD04 is supplied to the control unit e Shift register circuit The ES CK and DT serial data from the control unit are sent tolC1 BUAO94BF to perform the control op eration outlined in the following table Enable input Table 15 220 TX RX Unit Transmit Signal Channel e Outline In the transmission channel the desired frequency is produced by direct oscillation and is directly frequency modulated by means of a varicap diode e Modulator circuit The audio signal from the control unit is input to microphone amplifier HIC KCA04 ICA consists of a preemphasis circuit amplifier limiter and splatter circuit that eliminates unwanted high frequency components The voltage controlled oscillator VFO signal is directly frequency modulated by means of a varicap diode in the frequency modulator circuit e Younger stage circuit The signal output from the VCO is input to drive circuit HIC IC8 KCB15 The amplifier can obtain a stable drive output without adjustment because it has a large bandwidth An APC circuit controls the collector voltage in the Younger final stage e Power amplifier circuit The drive signal i
64. nicht gellefert Ref No Address Parts No SMES E E amp 144 TX RX UNIT 57 3580 Description E C80 1 050 C C81 CC45SL2H120J CERAMIC 12PF J C82 CK73FB1H102K CHIP C 1000PF K C83 CK45B2H102K CERAMIC 1000PF K C84 CM73F2H330J CHIP C 33PF J C85 CC73FCH1H220J CHIP C 22PF J C86 CC73FCH1HORSC CHIP C 0 5PF C c87 CC73FCH1HO20C CHIP C 2 0PF C88 CC45SL2H560J CERAMIC 56 J 89 CC45SL2H470J CERAMIC 47 J c90 CK73FB1H102K CHIP C 1000PF K C93 CC73FCH1HORSC CHIP C 0 5PF 094 CM73F2H300J CHIP C 30PF J C95 CC73FCH1HO20C CHIP C 2 0PF C C96 CK73FB1E103K CHIP C 0 01UF K C98 CK73FB1H102K CHIP C 1000PF K c99 CEO4NW1E100M ELECTRO 10UF 25WV C100 CK73FB1H102K CHIP C 1000PF K C101 1 100 ELECTRO 10UF 25WV C103 CK73FB1H102K CHIP C 1000PF K C104 CK73FB1E103K CHIP C 0 01UF K 6105 CK73FB1H223K CHIP C 0 022UF K C110 CC73FCH1HO30C CHIP C 3PF 111 CK73FB1E103K CHIP C 0 01UF K C112 CEQ4NW1A221M ELECTRO 220UF 1 C113 CC73FCH1H100D CHIP C 10PF D 114 115 CC73FSL1H101J CHIP C 100PF J C116 CC73FCH1H080D CHIP C 8PF D C119 CEO04NW1E100M ELECTRG 10UF 25WV C120 127 CC73FSL1H101J CHIP C 100PF J C128 129 CK73FB1H102K CHIP 1000PF K CE04EW1C102M C05 0345 05 C130 ELECTRG 1000UF 16WV TC1 TRIMMING CAP 10PF 22 0672 04 TERMINAL BGARD E22 0673 04 TERMINAL BOARD E30 2145 15 ANT CABLE 0 3007 05 DC POWER CORD 40 5461 05 PIN CONNECTOR 11 0442
65. 0 A tN Cu MU 2115754 902 0221 OLY 20 9 21 X1A SDSSCSHSM zoz 10221 950 502 018 11 2019 1 85087941 zat 79 rSx S0 9 0 0 H S01 1i0 0 navti21Q bOL S 7v O HOZVGh LL POvOH 21 50 5202 0589 5 6121952 Srv sx ram m amsa sts ILS 016 SE zT SA uQ 10970 AREE dn aes iota f 22 5 000 Zorg sora soraa FA ART qaw NOT 1 3 3 OLLO gaia 0251 90 9 6019 E T 2014 I I I I l I __ eT ed E DN EIN I I 1 I I raaa vivo tino viva no ano aso HLA SOSSZTSNSN 20221 1531 52 9 LDF ALA SOSITSNSN 0221 IM 2 ww ofan DTI 15035 79 LINN Av dSIQ Li 0 g1i vYSX O 787335 951 1 m DIEI to otu yz 5 L ie E EES ee A M e c a 77 LINO Av1dSIO i1 0 g v5xX WVd9VI0 9I1VIW3H9S 742 A742 E 042A BOARD VIEW 1200M TX RX UNIT X57 3600 11 UT 1200 M Co
66. 01gF 1 2 3 4 5 8 0 1 0 1pF 2 2 0 22pF 1 Type ceramic electrolytic etc 4 Voltage rating 1 O O 10pF f 2 Shape round square etc 5 Value 1st number Multiplier 3 Temp coefficient 6 Tolerance 1 O 1 100pF 2nd number 1 0 2 1000pF 0 001 2ndwors pome 30 60 120 250 500 Example CC45TH 470260 80 100 10uF 10 50 20 0 08 4 752 10 75 than Temperature Coefficient Less than 10 pF Rating voltage Dimension xi S A ESL e uh r 3r 23 rc Empty 5 6 0 5 50205 Less than 2 0 A a E Es 32z02 16 02 Less than 1 25 PIRE 29 03 125202 Less than 125 Cr cocoa CO f 3 T i Dimension 1 234 5 6 7 Chip B F 1 cerarnic electrolytic etc Dimension code Wattage RESISTORS 22 ane square etc 32 02 1 6 0 2 0 57 28 Chip resi bon IMEI 20 03 1 25 0 2 0 45 Chip resistor Carbon A Temp Boe RETRO 0 45 2A Expr 23 lt es 90297 oe 5 Voltage rating Z ox evo Val Dimension 1 2 3 4 5 6 7 5 Cora wattage Chip B F 2 Carbon resistor Normal type MES w UV CUCFEY TTF 12345 6 7 71 TM 742 A 742 942 New Parts Parts without Parts No are not supplied PARTS LIST Les articles non mentlon
67. 1 VR2 VR3 VR4 TS1 D1 D3 07 08 09 D10 D11 D12 013 015 016 IC2 IC3 IC4 IC5 IC6 IC8 IC9 91 02 93 RK 3FB24221J R92 0670 05 R92 1252 05 R12 6429 05 R12 6427 05 R12 6421 05 R12 6423 05 59 0444 05 77 15 228 DAN235 K 155184 DAN235 K 155181 MI407 M1308 188226 DSA3A1 155184 BU4094BF XRU4094BF KCH10 KCA04 KCB18 KCC04 KCD04 LASO10M KCB19 005 35 184 5 35 131 12 28C2714 Y DTC144EK DTC144EU 114 25 2714 2SJ106 GR 28A1362 Y 25 1119 5 DTC144WK FMW1 2SC2712 Y DTC144EK 2501757 28K208 Y 25 2714 28C2712 Y FMG1 25019028 25 2712 DTA114EK DTC143EK 58 3840 03 PARTS LIST 50 TX RX UNIT X57 3800 01 Description CHIP R 220 J 1 10W CHIP R 0 OHM CHIP R 0 OHM TRIM POT 100K TRIM POT 47K TRIM POT 4 7K TRIM POT 10K THERMAL SWITCH 90 C DIGDE DIQDE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE DIODE IC SHIPT STSRE REGISTER IC IC 50MHZ PLL PLL IC MIC AMPLIFIER IC DRIVE AMP SOM BAND IC APC IC FM IF DET IC LOW SATURATION REGULATOR FRONT ICCAM IF FET FET TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR DIGITAL TRNSISTOR TRNSISTOR TRNSISTOR DIGITAL TRNSISTOR TRNSISTOR FET TRNSISTOR TRNSISTOR TRNSISTOR TRNSISTOR TRNSISTOR DIGITA
68. 1 BU4094BF to perform the control operation outlined in the following table att Switching High when ATT is on for AM low for FM High for narrow for wide when off band Table 3 e ATT circuit If there is cross modulation the ATT circuit operates 28 TX RX Unit Transmit Signal Channel Outline In the transmission channel the desired frequency is produced by direct oscillation and is directly frequency modulated by means of a varicap diode e Modulator circuit The audio signa from the control unit is input to microphone amplifier HIC IC3 04 1C4 consists of a preemphasis circuit amplifier limiter and splatter circuit that eliminates unwanted high frequency components The voltage controlled oscillator VFO signal is directly frequency modulated by means of a varicap diode in the frequency modulator circuit Younger stage circuit The signal output from the VCO is input to drive circuit HIC IC16 KCB16 The amplifier can obtain a stable drive output without adjustment because it has a large bandwidth An APC circuit controls the collector voltage in the Younger final stage Power amplifier circuit The drive signal is amplified to the specified level by a discrete transistor 02 performs class amplification and the collector output voltage is controlled by an APC circuit Q202 amplifies the power by class C operation improving the efficiency of the final stage
69. 1 0K J 1 10W R115 RK73FB2A183J CHIP R 18K J 1 10W R116 RK73FB24A472J CHIP R 4 7K J 1 108 R117 118 RK73FB24A183J CHIP R 18K J 1 10W R119 RK73FB2A472J CHIP R 4 7K J 1 10W R120 RK73FB2A103J CHIP R 10K J 1 10M R121 R92 1215 05 CHIP R 470 J 1 24 R122 124 7 2 103 10K J 1 10W A TM 742 K P M M2 E E2 E3 B TM 942 K P M 42 742 942 80 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Telle ohne Parts No werden nicht gellefert Ref No Sm Es R125 129 R130 133 R134 R135 R136 137 R138 139 140 141 R142 R143 145 R146 R147 148 R149 R150 R151 01 02 4 D5 D6 0101 103 2 IC3 IC4 5 106 107 IC8 IC9 10 11 IC12 13 14 IC15 IC16 103 104 105 106 IC108 109 IC110 112 IC113 114 91 92 93 94 95 6 97 98 99 10 911 9101 9102 9103 Address Parts No t RK73FB2A104J RK73FB2A183J RK73FB2A4R7J RK73FB2A473J RK73FB24101J RK73FB2A473J RK73FB24101J RK73FB2A473J RK73FB2A4R7I RK73FB2A474J RK 3FB24A183J RK73FB2A332J RK73FB2A474J RK73FB2A472J DAN202U MA112 DTZ9 1 A MA112 DA204U HD6433388A04F LC3564PML 12 TA78LO6F TC74HC133AF TC74HCOOAF 3520CF HD74HC165FP BU4066BF NJM4558E TC35219F LC7385M PST7030MT TC4S11F TCAW66F TC4S66F NJM4558E LA4446 BU4053BF BU4053BF TC4S66F
70. 1 FMW1 012 13 23 25 2712 Q15 17 DTC144EU 018 2501757 Q20 DTCI24EK 021 22 25 4226 823 24 924 2 01760 0 025 1 026 25 106 68 Q27 DTA114 K Q28 DTC114EK D1 MAB62 03 716 04 6 155193 D5 02CZ62 X Y 07 155187 D8 02CZ12 X Y D9 HSK151 D10 13 MI808 D14 DSA3A1 D15 02C23 6 Y 2 D17 DAP202U D19 MI808 Component side E o 2 a pattern Foil side No mark does not Connected 145 D pattern C pattern 144 B pattern A pattern 143 nnected 146 Way 8t 242252 eio BI 30 6212 1412142252 2 sl 2T aia TM Ao a 52 M a ind m PT S 819 5 FEM PTEE T Y ou ol 2 a ale 2 aye 8 5g E 5 E PRA 3 5 131518 lea alae 481 012 x 2061451 zl 1089 ph eH 3 rem Xivi 15 625 60552 20 0 sv as 2 5 5 ave 2 1 x 40 1311 x 33 11210 820 7 E 2 BJR ca se 13 zi NEM 9666 352 ajaj v 2 30 sis 2 ola wee a ci x azz 60 awe o 924 8 at TE 30151938 Ld1HS ovy vh50184 WF N 2121 EH EA 3o 120 121 gt 1070971082
71. 10 101 106 25 4116 Q37 DTC114EU Q4 2SB815 6 7 08 107 109 2501757 Q11 DTA144EU Q102 2SA1641 S T Q103 DTC144EK Q104 DTA144EK Q105 DTD143EK 2 i5 D1 DAN202U D2 4 6 MA112 D5 DTZ9 1A D101 103 DA204U m 942A K P M 742E E E2 E3 DISPLAY UNIT 54 3130 11 742A K P 2 Foil side view 942A K P M 742E E E2 E3 DISPLAY UNIT X54 3130 11 742A K P M M2 EW BOARD en bois W199 a GREEN 9 293738 8 103735 Qa ai gpu 4 5520 60 THIGH gi 22 8120 1 2 oor PRE 1 1 404719 26 IC2 L78LR058 FA IC3 6 203 206 TC4S11F IC201 202 MSM5265GS V1K 1C204 TC74HC73AF IC205 NJM78L05UA 01 25 1745 6 7 02 2581119 5 Q3 101 DTC114EU Q4 5 DTC144EU D1 MA112 D2 MA720 03 4 30 2025 05 D101 105 B30 2048 05 0107 112 114 830 2053 05 MSM5265GS V1K HD404719A26H 8 14 22 20 2 310W3H ZIS 9 I 278 00 0 717192 015 Component side view 1C1 HD404719A26H IC2 L78LR05B FA IC3 6 203 206 TC4S11F 1C201 202 MSM5265GS V1K 1C204 1C74HC73AF 1C205 NJM78LOSUA 01 2541745 6 7 02 2581119 5 Q3 101 DTC114EU Q4 5 DTC144EU D1 MA112 D2 MA720 D3 4 B30 2025 05 D101 105 830 2048 05 D107 112 114 B30 2053 05 8815 C4116 C114EU D143EK D1757K 564PML 12 g 7 144 7 114 2541745 32 iCase z lt m io o tr I 1 2SB1119 B C
72. 1291 05 FIXED RESISTOR R47 RK73FB2A153J CHIP R 15K J 1 10W R48 RK73FB2A333J CHIP R 33K J 1 10W R49 RK73FB2A223J CHIP R 22K J 1 10W R50 RK73FB2A474J CHIP R 470K J 1 10 R51 53 RK73FB2A473J CHIP R 47K J 1 10W R54 57 R92 0670 05 CHIP R 0 OHM R58 RK73FB24A472J CHIP R 4 7K J 1 10 59 RK73FB2A103J CHIP R 10K J 1 10W R60 RK73FB2A473J CHIP R 47K J 1 10W R61 RK73FB2A473I CHIP R 47K J 1 10 R62 RK 73FB2A473J CHIP R 47K J 1 10W R64 RK73FB2A473J CHIP R 47K J 1 10W R64 RK73FB2A473J CHIP R 47K J 1 104 R65 66 RK73FB2A473J CHIP R 47K J 1 10W R67 RK73FB2A473J CHIP R 47K J 1 10W R67 RK73FB24A473J CHIP R 47K J 1 10 R68 RK73FB2A474J CHIP R 470K J 1 10W R69 RK73FB24121J CHIP R 120 J 1 10W R70 71 RK73FB2A474J CHIP R 470K J 1 10W R72 RK 73FB2A682J CHIP R 6 8K J 1 104 R73 RK73FB2A473J CHIP R 47K J 1 1098 R74 RK73FB2A473J CHIP R 47K J 1 10W R74 RK73FB2A473J CHIP R 47K J 1 10W R75 7 2 473 47K J 1 10W R76 RK 73FB2A473J CHIP R 47K J 1 10W R77 RK73FB2A473J CHIP R 47K J 1 10W R80 RK73FB2A473J CHIP R 47K J 1 10W R81 82 RK 73FB2A121J CHIP R 120 J 1 10 R83 RK73FB2A102J CHIP R 1K J 1 1040 R101 RK73FB24A563J CHIP R 56K J 1 10W R102 104 RK73FB2A223J CHIP R 22K J 1 10W R105 RK73FB2A101J CHIP R 100 J 1 10W R106 107 RK73FB2A332J CHIP R 3 3K J 1 10W R108 RK73FB2A474J CHIP R 470K J 1 10W R109 RK 73FB24A183J CHIP R 18K J 11109 R110 RK73FB2A4725 CHIP R 4 7K J 1 10W R111 R92 0685 05 CHIP R 22 J 1 20 112 114 RK73FB2A102J CHIP R
73. 144 430 MHz FM MULTI BANDER TM 742 A E 144 430 1200 MHz FM TRIBANDER TM 942 A SERVICE MANUAL Panel Ass y 62 0221 03 TM 742A 62 0222 03 TM 742E A62 0197 03 TM 942A E Knob Panel Ass y K29 4806 04 62 0219 03 29 4840 041 Knob K29 4805 04 Photo is 942 CONTENTS OVER VIEW 2 430 440M TX RX UNIT X57 359X XX 149 CIRCUIT DESCRIPTION 3 220M TX RX UNIT X57 3810 10 153 DESCRIPTION OF COMPONENTS 51 144M TX RX UNIT X57 3580 XX 157 SEMICONDUCTOR DATA 68 50M TX RX UNIT 57 3800 011 161 PARTS 5 71 28M TX RX UNIT 57 3790 01 165 EXPLODED VIEW 116 BLOCK 169 PACKING A RES 120 LEVEL DIAGRAM 175 ADJUSTMENT 122 TSU 7 CTCSS UNIT 177 PC BOARD VIEWS SCHEMATIC DIAGRAM MC 45 MULTI FUNCTION MICROPHONE 179 CONTROL UNIT X53 346X XX 135 MC 45DM MULTI FUNCTION MICROPHONE DISPLAY UNIT X54 3130 11 137 WITH 180 SCHEMATIC DIAGRAM 139 UT 288 50S UT 2208 1200 SPECIFICATION 181 1200M TX RX UNIT X57 3600 11 143 BACK COVER Mettallic cabinet TOP A01 2068 03 mid f f 1992 12 PRINTED IN JAPAN
74. 18 25 3123 Q19 FMG1 020 2501760 0 Q21 2SJ106 GR D1 HSK277 D2 1SV128 03 6 7 13 155184 04 15 862 05 155181 D8 MI407 D9 MI308 010 11 14 716 D12 DSA3A1 BINGOW IC1 KCD04 1 2 04 IC3 BU4094BF IC4 LA5010M IC5 KCC04 IC6 KCB14 1C7 M57788M 8 12 9 IC10 KCHO7 01 3 35 184 5 Q2 2SK582 Q4 DTC114EK Q5 25C2714 Y 06 7 5 08 2541362 Q9 DTC144WK 010 11 17 25 2712 012 25811195 Q13 15 0 144 016 2501757 018 25 3123 Q19 FMG1 020 2501760 0 Q21 2SJ106 GR D1 HSK277 02 15 128 03 6 7 13 155184 04 15 862 05 155181 08 407 09 08 010 11 14 716 D12 DSA3A1 BU4094BFM57729 pus v m A pattern Qo i G m A pattern 150 149 car Lst quip pu 815 51 Ex 5 51 5 5 dS 1X3 as jo INI 5 SBA an sx a Teles sss sS 8 118 18 8 1312 81 53 ER 34 EERE EEE EHH IND 34 53 804 901 1802 722 LH HYH 90i 802 a G NS 90 14032 LL y asea 5 843 901 1NOD 82 90 819 901 1102 853 909 142 r l 1 1 34 901 1405 9 l s 0 01 is or ECELE m zd Ri D 4 v a L zal Loy I x pe e El 881901752 5 15
75. 19 SMALL FIXED INDUCTSR O 15UH SMALL FIXED INDUCTGR O 22UH CRYSTAL RESONATOR 11 05MHZ CRYSTAL FILTER 10 595MHZ L40 1592 19 L40 2282 19 L77 1464 15 L71 0421 05 SCREW X3 BRAZIER HEAD TAPTITE SCREW BRAZIER HEAD TAPTITE SCREW FLAT HEAD TAPTITE SCREW 09 2179 05 N87 2606 46 N87 2608 46 N88 2606 46 RK 3FB2A472J CHIP 4 7K 1 10W RK73FB2A103J CHIP 10K 1 10W RK73FB2A472J CHIP 4 7K 1 10W RK73FB2A680J CHIP 68 1 104 RK73FB2A271J CHIP 270 1 1089 7 2 680 66 RK73GB1J104J CHIP 100K RK73GB1J562J RK73GB1J154J RK73GB1J101J CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP RK 3GB1J103J RK73GB1J104J RK73GB1J100J RK73FB2A101J RK73FB2A473J RK73FB2A102J RK 73FB2A223J RK73GB1J152J RK73FB2A101J RK73FB24152J CHIP CHIP CHIP CHIP CHIP RK73FB24391J CHIP RK73FB24A563J CHIP RK73FB24223J CHIP RK73FB24A331J CHIP RK73FB24A222J CHIP D 23 gt gt 20 2D mmm 70 20 20 CIC hy C4 C4 Ca C C4 CA C4 C C4 C C4 RK73FB2A274J CHIP A TM 742 K P M M2 E E2 E3 B TM 942 K P M TM 42A 742 El942 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert 50 TX RX UNIT X57 3800 01 Description R32 RK73FB2A101J R33 RK 73FB2A221J R34 RK73FB2A103I R35 RK73FB2A334J R36 RK73FB2A473J R37 RK73FB2A471J R38
76. 2 Deviation Frequency 1270 000 MHz DC detector adjustment AG 1kHz 50 P Oscilloscope check M 28 mV E Transmit Frequency 1270 000 MHz AG 1KHz 5 0 K P M 2 8 mV Transmit 3 Tone check 1279 98 MHz Frequency Tone On Transmit 4 Protection check Frequency 1240 000 MHz 1270 000 MHz 1299 980 MHz Antenna Open Transmit 5 Frequency check Frequency Transmit Fig 59 1200 MHz band adjustment Component layout upper view The adjustment of the 12000MHz BAND can be carried out by taking the 144MHz BAND and 430MHz BAND units out of the control unit and by installing the 1200MHz BAND at the position of the 430MHz BAND central part Cord with alligator clip should be used to connect the power supply Take care for the clip not to short circuit with the casing 128 742 A 742 942 ADJUSTMENT Measurement point Adjustment point Test Specification equipment 2 Terminal Method Digital TX RX TP3 Check the lock 5 5 7 0 voltmeter voltage Condition Rear TX RX L1 4 Adjust so that the panel voltmeter reading is maximum Rear EXT SP Minimize the 596 or less panel distortion factor 12 dB SINAND or more e 28 MHz Band UT 28S Common Section Adjustment 1 Frequency 29 700MHz Receive 1 Lock Voltage check Receiver Section Adjustment Specification equipment voltmeter reading is maximum 1 Frequency 29 700MH2 SS
77. 2 MIS isnipy ES XH XL joueg JO MES 42945 EWA XH X1 ASu nba33 quauidinbse 3uaunsn py jurod Xoeuo JeM Od 01 t 12849 juaunsnipe ZHW 096766 3ueunsn py uonoes yoayo 490 241 12842 Edl XHXL jeueiq ZHIW 000 vs A2uenbai 71 J907 L ZHW 000 05 77 12849 ZHIN 000 26 ZHN 000725 Aduanbay Jamod L Sued wun yu tudinb uonea2yiosds 5591 jueunsn pg quod juawainseay yu uuysn py uogas uowwog SOS Ln pueg zHIN 04 jueunsn py uonoes 1933 IN3WIS POV WN vel mata saddn 3noAe pueq ZHI 022 29 B14 yllusues sy u do euuajuy HIN 086722 42842 401981044 559 JO jaueg jigjunoo 2 F ZHW 004 222 isnipy 121 189g Aouanba y CT 39945 HH 9v 5 050 ZH 002 ZH oF ysnipy ZgA 4884 10 9918p MO Boe 29999 MD Jaueq MOS 72942 ANv
78. 2 1 11 KCH05 e Power amplifier circuit A drive signal is input to power module IC10 and amplified to the specified level e APCcircuit The automatic transmission output control circuit APC detects and partially amplifies the power module output with a diode and controls the output control voltage The control voltage is outputin inverse proportion to the output so the control voltage output is always constant To protect the set against excessive temperature rise the high power unit has a thermal switch The high power unit is automatically set to alow power by the thermal switch when it exceeds the specified temperature R Binary 14 bit programmable counter setting value 2048 In this case n is 208 and A is 36 Therefore fyco 208 x 128 36 x 12800 2560 26624 37 x 5 133300 kHz 133 300 MHz The following table lists the pin functions of the PLL circuit Modulation signal Se 8V ripple filter 12 8 MHz crystal Unused oscillation Clock input Enable input Lock voltage output e 8T 8 V during transmission and unlock signa A 0 7 V voltage is applied to the base of Q13 during reception Q13 is set on Q14 is set off and 011 16 set off No voltage appears at the collector 8T of Q11 Serial data is output from the control unit during transmission and input to shift register IC1 Pin 4 of IC1 is then set low Therefore Q13 is changed from on to off Q14 from off to on and Q11 from off to on An8
79. 220 0319 24 221 4308 14 121 4404 04 J21 4405 04 129 0454 03 169 0325 05 K29 4805 04 29 4806 04 29 4808 04 29 4840 04 L15 0310 25 09 2084 05 N10 2030 46 N30 3040 46 N32 2606 46 N33 2606 45 N33 2614 45 CONNECTING WIRE SPEAKER FLAT CABLE 16P CONNECTING WIRE FAN HEAT SINK HEAT SINK COVER COVER COVER CAVR SP FAN PANEL LOWER PANEL UPPER 154 20 0 CODE FUSE FUSE COMPRESSION SPRING LEAF SPRING VOL KNOB FRAT SPRING SPEAKER NON WOVEN FABRRIC 100X85 NON WOVEN FABRRIC 130X5 NON WOVEN FABRRIC 60X10 SHEET PANEL SHEET PANEL LOWER SHEET 50 25 SHEET 30X20 ENCODER NON WOVEN FABRIC 30X10 POLYSTYRENE FOAMED FIXTURE PACKING FIXTURE PACKING FIXTURE PROTECTION BOARD PROTECTION BOARD PROTECTION BOARD 150X30 BAG BAG 200X200 BAG 230X400 BAG 170X270 ITEM CARTON BOX 942A ITEM CARTON BOX 942A OUTER CARTON BOX MIC FOOK ACSY MOUNTING HARDWAEE FAN MOUNTING HARDWARE RELEASE MOUNTING HARDWARE PANEL WIRING BGARD CACSY Q RING NUT KNOB ENCODER KNOB MHz KNOB SQL KNOB ASSY VOL LGW FREOENCY CHOKE COIL SCREW PULS TERMINAL HEXAGON NUT BAND UNIT PAN HEAD MACHIN SCREW FLAT HEAD MACHIN SCREW OVAL HEAD MACHIN SCREW OVAL HEAD MACHIN SCREW 742 K P M2 E 2 942 K P 75 TM 42A 742 942 x New Parts Parts without Parts No ar
80. 2H150J CC45SL2H030C CK73GB1H103K CK73FB1E103K CK73GB1H103K CK73FB1E103K CK73GB1H103K CK73FB1E103K CC73GCH1H120J CK73GB1H103K CC73FCH1HO60D CK73GB1H103K CK73FB1E103K CHASSIS LABEL S NO UNIT CERAMIC 75 CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC CHIP CHIP AROS Ca ty by C4 C4 CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP C x A TM 742 K P M M2 E E2 E3 B TM 942 K P M 103 TM 42A 742 E 942 104 x New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert 50 TX RX UNIT X57 3800 01 Ref No Address Parts No E Description m Ww CK73FB1H102K CHIP C 1000PF K CK73FB1E103K CHIP C 0 0108 K 1 040 CEO4NW1C470M ELECTRO ATUF 16WV CK73GB1H103K CHIP C 0 01UF K CK73EF1C105Z CHIP C 1 0UF C92 0003 05 CHIP TAN 0 47UF 25WV CK73FB1E104K CHIP C 0 10UF K C92 0504 05 CHIP TAN 0 68UF 20WV CEO4NW1C470M ELECTRO 47UF CK73FB1E103K CHIP C 0 01UF CC73GCH1H100D CHIP C 10PF D CEO4NW1C470M ELECTRO 47UF 16WV CK73FB1E103K CHIP C 0 01UF K C92 0004 05 ELECTRO 1 0UF CK73FB1E103K CHIP C 0 01UF CEO4NW1E100M ELECTRO 10UF 25WV CK73FB1E103K CHIP C 0 Q1UF K CK73FB1E103K CHIP C 0 01UF K CEO4NW1C470M ELECTRO 47UF CK73FB1E103K CHIP C 0 01UF K CC73FCH1H270J
81. 3 05 LED 0114 B30 2053 05 LED IC1 HD404719A26H IC CPU IC2 L 8LR05B FA IC IC3 6 TC4S11F IC 2 INPUT NAND GATE IC201 202 MSM5265GS V1K IC LCD DRIVER IC203 TC4S11F IC 2 INPUT NAND GATE 10204 TC74HC73AF IC IC205 NJM78L0SUA IC VGLTAGE REGULATGR 51 16206 TC4S11F IC 2 INPUT NAND GATE 01 92 93 94 30 0865 15 2541745 6 7 2581119 5 DTC114EU DTC144EU LAMP LED DIGITAL TRANSISTOR DIGITAL TRANSISTOR DIGITAL TRANSISTOR DTC114EU 12 P M 11 K B42 2437 04 LABEL S NO 1 040 742 K P M2 E 2 942 K P TM 742 A 742 E 942 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentlonnes dans le Parts No sont pas fournis Telle ohne Parts No werden nicht geliefert 144M TX RX UNIT X57 3580 XX Ref No Address Parts No SMES i 9 CK73FB1H102K CK73FB1H102K CK73FB1E103K CC73FCH1HORSC 7 1 151 CC73FCH1H030C CC73FCH1HOR5C CC73FCH1H150J CC73FCH1HO20C CK73FB1H102K CC73FCH1HO60D CK73FB1H102K CC73FCH1HOSOC CK73FB1E103K CK73FB1H102K CK73FB1E103K 4551 2 020 CK73FB1H102K CK73FB1E103K CC 73FCH1H390J CC73FCH1H101J CK73FB1H102K CK73FB1E104K CK73EF1C108Z CK 73FB1E103K CC73FCH1H010C CEO4NW1C470M C92 0504 05 CEO4NW1C470M 92 0003 05 CEO4NW1E100M CEO4NW1C470M CK73FB1E103K CK73FB1H102K 7 1 1052 CC73FUJ1H150J CK73FB1H102K CC73FUJ1H220J CK73FB1
82. 32H IC1 Caution This modification requires advanced surface mount soldering equipment that is rated for CMOS circuits It also requires familiarity with advanced surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself P Seek qualified assistance from your closest Kenwood Service Center Long Beach CA or Virginia Beach VA Time required for this modification is 90 minutes or less Service code 98 B X53 346 B 2 C IC1 D 91 631194 by CLM for Kenwood Service Corporation E51 93 054 Page 1 of 1 KENWOOD Se rvi ce B u n Amateur Radio Division Subject TM 642 742 942A Microprocessor Change Date February 10 1994 Symptom Due to a recent rule change by the FCC it is no longer possible to supply transceviers or provide replacement microprocessors that would allow a transceiver to receive in the 800 MHz band Corrective Action The microprocessor program of IC5 has been modified to prevent 800 MHz band reception Production has been changed beginning with serial number lot 510XXXX Units produced after this point will not be capable of 800 MHz reception Parts Required Qty Description __ Old Kenwood Part New Kenwood Part ___ 1 Microprocessor HD6433388A22F HD6433388A25F Procedure When ordering a replacement microprocessor you will be supplied with the new version Please make sure your customer understands the
83. 470PF 10PF 100PF 1 5PF CHIP CHIP CHIP CHIP CHIP 47 0 01UF 1 5 100PF 470PF CHIP CHIP CHIP CHIP CHIP 100PF 1 5 0 470 470PF 3PF CHIP CHIP ELECT CHIP CHIP 1 5PF 1000PF 470PF CHIP CHIP CHIP CHIP CHIP 8PF 0 01UF 3PF 100PF 3PF 470PF CHIP CHIP CHIP CHIP CHIP 4700PF 1000PF 15PF 22PF 0 01UF CHIP CHIP CHIP CHIP CHIP ELECTRG 47UF CHIP 1 00 O O O O O OOOOO 742 2 2 942 0 02206 o lt G G O OKRO OXF UPC OXU NO o lt 742 A 742 El942 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Address Parts No Sms 9 1200 TX RX UNIT 57 3600 11 Description E 4 7n 0 C45 92 0002 05 0 22UF 35WV C46 CK73FB1E104K CHIP C 0 100 K C47 CK73FB1H471K CHIP C 470PF K C48 92 0504 05 0 68UF 20WV C49 C92 0004 05 ELECTRO 1 0UF cso 73 1 223 0 0220 C51 CK73EF1C105Z CHIP C 1 0UF Z C52 CC73FCH1H030C CHIP C 3PF C C53 CK73FB1E473K CHIP C 0 047UF K C54 CEO4NW1C470M ELECTRO 47UF 55 CK73EF1C105Z CHIP C 1 0UF Z C56 CK73FB1E223K CHIP C 0 022UF K C57 CK73FB1H471K CHIP C 470PF K C58 59 CEQ4
84. 54 1C1 BU4094BF IC1 XRU4094BF IC2 LA5009M 5 004 IC7 KCA04 IC8 KCB15 9 4 10 57774 1 01 2 38 184 6 Q3 2SC2714 Y Q10 020 25A1362 Y Q11 2S81119S Q12 DTC144WK 013 14 21 25 2712 Q15 17 DTC144EK 018 2501757 919 25 208 Q22 FMG1 Q23 2SD1902R Q24 2SJ106 GR D3 D5 D7 D20 1SV164 011 12 155184 D13 DAN235 K 014 155181 D15 MI407 D16 MI308 017 18 155226 D19 DSA3A1 Foil side view 2SD1757 INPUT Case 4 KCDO4 KCB15 KCHO8 KCCO4 25019028 lt DTCi44EK 25 2712 DTC144WK 25 2714 25811195 5 2 FMG1 5 LA5009M 2SA1362 9 en A pattern IC1 BU4094BF IC1 XRU4094BF IC2 LA5009M IC5 KCD04 1 7 4 IC8 KCB15 IC9 KCCO4 1C10 M57774 IC11 KCHOB Q1 2 3SK184 S 03 25 2714 Q10 020 25A1362 Y 011 25811195 Q12 DTC144WK 013 14 21 25 2712 Q15 17 DTC144EK 018 2501757 019 2SK208 Y Q22 FMG1 Q23 2SD1902R Q24 2SJ106 GR D3 D5 D7 D20 1SV164 011 12 155184 D13 DAN235 K 014 155181 D15 MI407 D16 MI308 017 18 155226 D19 DSA3A1 153 Common DC line 742 742 E 942 Signal line Control line POWER MODULE ICIO 5 SCHEMATIC DIAGRAM 220M TX RX UNIT X57 3810 XX ANT A9 0001 015 o H a b q I ivevsa 4 6 100 169 10 962 100 262 017 155226 S METER E Mu gs u Q23 25018028 QIO 2
85. 6 5 K ZHWL 6S ZHAL 08Z L gt I co WALA 955 1 1 ava 50 D 20 LO 1 ks g a E a LNVOEY O O i si I eer 821 1 ET 8PS 821 A 9 0 056656 lt 9 2 9 LZ SEV ds J 9 4 i 2 L aX 20 21 9 L t 50 21 TE Warrm x F 1 vs T I 321 S L i dl YHPLET gPS 0Ort 8P5 84 1 6 XX X9vE 5x XX 08S LSX K ZHW569 0L i ZHWL STL i 295 XH 176 75 42 A 742 E 942 BLOCK DIAGRAM 28M TX RX UNIT X57 3790 01 H 10 06LE LSX LINN XUXLI8Z 171 BLOCK DIAGRAM TM 742 742 942 50M TX RX UNIT X57 3800 01 L0 O08E LSX 105 172 42 742 E 942 TSU 7 CTSS UNIT TSU 7 PC BOARD VIEW TSU 7 PARTS LIST Ref No Address Rart Rarts No Description Desti Re nation marks TSU 7 X52 3170 00 G10 0692 04 CUTTION H21 0704 04 CUTTION L78 0062 05 STAL 1MHz FX365LS IC DAN202U DIODE E40 5341 05 R12 6526 05 TRIM POT 47K RK73BG1J274J CHIP R J 270K RK73BG1 J824J CHIP R J 820K RKT3BF1J103J CHIP R J 10K RKT3BG1J105J CHIP R J 1M RK73BG1J473J CHIP R J 4K CK73GB1H471K CHIP K
86. 6 04 K29 4808 04 K29 4840 04 115 0310 25 NO9 2084 05 N30 3030 46 N32 2606 46 33 2606 45 N33 2614 45 N35 2605 45 N46 3010 46 N80 2006 45 N80 2008 45 N80 2605 45 N86 2606 45 N87 2606 46 N87 2608 46 NON WOVEN FABRIC 130X5 NON WOVEN FABRIC 60X10 NON TOVEN FABRIC 145X5 NON WOVEN FABRIC CASE SHEET PANEL UPPER SHEET PANEL SHEET CPU 60 25 SHEET 30X30 ENCODER NON WEVEN FABRIC 30X10 POLYSTYRENE FORMED FIXTURE PACKING FIXTURE PACKING FIXTURE PACKING FIXTURE PACKING FIXTURE PACKING FIXTURE PROTECTION PROTECTION PROTECTION PROTECTION PROTECTION PROTECTION PROTECTION PROTECTION BOARD 150X30 BOARD 260X325 BQARD 260X325 BAG BAG 200X200 BAG 230X400 BAG 170X270 BAG 170X270 ITEM CARTON BOX TM 742A 440M ITEM CARTON BOX TM 742A 430M ITEM CARTON BOX TM 742E OUTER CARTON BOX TM 742A OUTER CARTON BOX TM 742E F8G8KCACSY MOUNTING HARDWARE FAN MOUNTING HARDWARE MOUNTING HARDWARE RELEASE MOUNTING HARDWARE PANEL WIRING BOARD ACSY BUSHING KNOB ENCODER KNOB BUTTON MHZ KNOB KNOB ASSY SOL VOL LOW FREQUENCY CHOKE COIL SCREW PLUS TERMINAL PAN HEAD MACHINE SCREWCUNIT FLAT HEAD MACHINE SCREW TX RX D OVAL HEAD MACHINE SCREM CASE OVAL HEAD MACHINE SCREW FAN BINDING HEAD SCREW PANEL PAN HEAD TAP SCREW MIC HOOK PAN HEAD TAPTITE SCREW PANEL PAN HEAD TAPTITE SCREW PANEL PAN HEAD SCREW PAN
87. 73 72 71 RBO TOC 80 RD2 AN6 79 RDI ANS RD3 AN7 AGND a Y Jg 21 22 23 24 E ES 28 29 30 31 32 010 D12 D13 D14 D15 RO0 ROI RO2 RO3 R10 R11 Dil 38 69 RA2 TOG HD404719A26H 5 34 R12 68 RAIAGI R13 67 RA0 IG0 35 36 R20 66 93 502 R21 765 92 512 37 R22 64 91 5 2 62 R83 SI1 61 2 501 63 ROO SCK1 60 R81 INTS 59 4 R73 INT3 R72 INT2 R70 INTO R63 TOE2 R62 TOEI R61 Vref R60 COMP R53 R52 48 R51 R50 Vdisp 46 R43 R42 R41 R40 R33 41 R32 TM 742 A 742 E 942 CIRCUIT DESCRIPTION HD404719A26H PORT LIST IC1 name PS OFF 4 02 PDoBELL PDoTONE pum tus S U U U U ESN UNES RON ROS 7 C _ C u Content GND DONT USE 2 B RESET 4 MHz Xtal 4 MHx Xtal GND NC OPEN 5 V 5M 5 V 5M PDoREV 0 PDoMHZ PDoCSA q PDoCSB 2 Do PDoLOW l LOW 21 Dio PDoMUTE MUTE PDoCSC PDoBSA PDoBSB PDoBSC 39 TM 742 A 742 E O42 CIRCUIT DESCRIPTION HD404719A26H I O PORT LIST IC1 NC Vcc Port name RE ou CS LED fest om owl emmo
88. 9M IC8 KCB17 IC9 KCD05 01 35 179 1 02 35 131 12 03 25 2714 Q4 DTC144EK Q5 DTC144EU 06 7 DTA114EK Q8 2SC2714 Y Q9 2SJ106 GR 010 25 1362 011 25811195 Q12 DTC114WK Q13 FMW1 014 25 2712 Q15 17 DTCI44EK 018 2501757 019 25 208 020 25 2714 021 25 2712 022 1 Q23 2SD1902R 024 25 2712 Q25 DTA114EK Q26 DTC143EK 027 0 144 01 2 MA77 03 6 1SV228 07 9 DAN235 K 08 155184 010 155181 D11 MI308 UM9401 012 013 14 155226 D15 DSA3A1 016 17 155184 ui uj Z T o TLEEETERRI 4 X Trj 5 9 u Y Y NNT 2 o 2289 eus 3 SUR QQOOQNSNqe ta m c lt IC1 BU4094BF XRU4094BF IC2 KCH09 IC3 KCA04 IC4 KCB16 IC5 KCC04 IC6 KCD04 1C7 LA5009M IC8 KCB17 IC9 KCD05 Q1 3SK179 L Q2 3SK131 V12 Q3 2SC2714 Y Q4 DTC144EK Q5 DTC144EU Q6 7 0 114 Q8 2SC2714 Y Q9 2SJ106 GR Q10 2SA1362 Y Q11 2SB1119S Q12 DTC114WK 013 1 Q14 2SC2712 Y Q15 17 DTC144EK Q18 2SD1757 K 019 25 208 020 25 2714 Q21 2SC2712 Y Q22 FMG1 Q23 2SD1902R Q24 2SC2712 Y Q25 DTA114EK Q26 DTC143EK Q27 DTC144EK 01 2 MA77 D3 6 1SV228 07 9 DAN235 K 08 155184 010 155181 D11 MI308 UM9401 D12 MI308 013 14 155226 DIS DSA3A1 016 17 155184 166 Clu 9 268 s NI 2 5 LLI m EP lt
89. B2A104J R92 0679 05 RK73FB2A392J R92 0670 05 R92 1213 05 RK73FB2A223J RK73FB2A471J R92 0699 05 R92 0670 05 73 2 332 7 RK73FB2A221J RK73FB2A473J RK73FB2A104J RK 73FB2A223J RK73FB24A103J R92 0670 05 RK73FB24102J R12 6429 05 R12 6427 05 R12 6423 05 579 0401 05 15 164 220M TX RX UNIT X57 3810 10 Description 58 10K J 1 10W CHIP R 390K J 1 10W CHIP R 10K J 1 10W CHIP R 0 OHM CHIP R 2 2K J 1 10W CHIP R 100 J 1 10W CHIP R 0 OHM CHIP R 1 8K J 1 108 CHIP R 10K J 1 10W CHIP R 1 8K J 1 10W CHIP R 22K J 1 10W CHIP R 27K J 1 10W CHIP R 47K J 1 10W CHIP R 4 7K J 1 10W CHIP R 0 OHM CHIP R 22K J 1 10W CHIP R 120K J 1 10W CHIP R 47K J 1 10W CHIP R 470 J 1 10W CHIP R 100K J 1 10W CHIP R 1 0 J 1 10 CHIP R 0 OHM CHIP R 10K J 1 10W CHIP R 470 J 1 10W CHIP R 0 OHM CHIP R 2 2K J 1 10W CHIP R 0 OHM CHIP R 1 2K J 1 10W CHIP R 22 J 1 10W CHIP R 1 0K J 1 108 CHIP R 0 OHM CHIP R 100K J 1 10W CHIP R 0 OHM CHIP R 3 9K J 1 10W CHIP R 0 OHM CARBON J CHIP R 22K J 1 10W CHIP R 470 J 1 10W SOLID 10 1 2W CHIP R CHIP R J CHIP R 220 J 1 108 CHIP R 47K J 1 10W CHIP R 100K J 1 100 CHIP R 22K J 1 10W CHIP R 10K J 1 10W CHIP R 0 OHM CHIP R 1 0K J 1 10W TRIMMING POT 100K TRIM POT TRIM THERMAL SWITCH 95 C DIODE A TM 742 K P M M2 E E2 E3 B TM 942 K P M TM 742 AJ 42 942 TOM PARTS LIST Parts without Parts No are not supplled
90. C98 C99 C100 C101 C102 11 112 11 114 115 C116 1 3 C117 C118 C119 120 C121 C122 123 C124 125 C126 C127 C129 C133 C137 C138 TC1 203 CNI 2 Ji TP2 28M TX RX UNIT X57 3790 01 Description s n d CC73FCH1H180J CHIP C 18PF J CK73FB1E103K CHIP C 0 01UF K CEO4NW1C101M ELECTRO 1000 16WV CK73FB1E103K CHIP C 0 01UF K CK73FB1H223K CHIP C 0 022UF CK73FB1E103K CHIP C 0 01UF K 1 1052 1 0UF 2 CEO4NW1E100M ELECTRO 10UF 25WV CK73FB1E103K CHIP C 0 01UF K CK73EF1C105Z CHIP C 1 00 2 73 1 223 CHIP 0 0220 K CK73FB1E103K CHIP C 0 01UF CK73FB1E103K CHIP C 0 01UF K 7 1 102 1000 K CEO4NW1E330M ELECTRG 33UF 25WV CK73FB1E103K CHIP C 0 01UF K CM73F2H102J CHIP C 1000PF J CM73F2H271J CHIP C 270PF J 93 0509 05 6800PF CC73FCH1H330J CHIP C 33PF J 6800PF 93 0509 05 CK73FB1E103K CHIP 0 01UF K CC73FCH1HO40C CHIP C 4PF CC73FCH1HORSC CHIP C 0 5PF c CK73FB1E103K CHIP C 0 01UF K CC73FCH1H080C CHIP C 8 0PF CC73ESL1H101J CHIP C 100PF J CC73FCH1H820J CHIP C 82PF J CK73FB1E103K CHIP C 0 01UF K CC73FCH1HORSC CHIP C 0 5PF 73 51 1 101 100PF J CK73FB1E103K CHIP C 0 01UF K CK73GB1H103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CK73FB1H102K CHIP C 1000PF K CEO4NW1E100M ELECTRO 100 25WV 1 103 CHIP 0 01 K CC73GCH1H680J CHIP
91. CK73FB1E103K CHIP C 0 01UF K C90 CC73FCH1H020C CHIP C 2 0PF C c91 CC73FCHIHORSC CHIP C 0 SPF C92 96 CK73FB1E103K CHIP G 0 01UF K C97 CC73FCHIHO20C CHIP C 2 0PF C98 99 CC73FCH1H390I CHIP C 39PF J C100 CK73FB1E103K CHIP C 0 01UF K C101 CC 3FCH1HOR5C CHIP C 0 5PF 102 111 CC73FSL1H101J CHIP C 100PF J C112 113 CK73FB1E103K CHIP C 0 01UF K C114 CK73GB1H103K CHIP C 0 01UF K C115 116 CK73FB1E103K CHIP C 0 01UF K C117 CK73FB1H102K CHIP C 1000 K C118 CEO4NW1E100M _ELECTRO 10UF 25WV 119 CK73FB1E103K CHIP C 0 01UF K 124 125 CK73FB1E103K CHIP C 0 01UF K C126 CK73GB1H102K CHIP C 1000PF K C127 CK73FB1E103K CHIP C 0 01UF K C128 CC73GCH1H270J CHIP C 2 PF J 130 131 7 1 1 5 1 5PF C C132 CC73FCH1H180J CHIP C 15 J 133 CC 73FCH1H560J CHIP C 56PF J C134 CC73GCH1HOSOC CHIP C SPF C135 CC 73FSL1H101J CHIP C 100PF J C136 CK73FB1E104K CHIP C 0 1008 C138 CC73GCH1H151J CHIP C 150PF J C139 140 CC73FCH1H470J CHIP C 47 J TC1 C05 0345 05 TRIMMING CAP 10PF E22 0673 04 TERMINAL 203 0 3009 15 CABLE CN1 2 40 5461 05 ASSY 12P 11 11 0442 05 PHONE JACK TERMINAL TP SHIELDING PLATE FINAL SHIELDING PLATE L TYPE SHIELDING SHIELDING CASE VCG PLL INSULATING SHEET APC TP2 23 0465 05 10 2006 14 10 2009 04 10 2010 03 F10 2012 04 F20 1008 04 205 204 F20 1090 04 INSULATING SHEET 60X22 FLAT SPRING THERMAL SWITCH FLAT SPRING BPF COI
92. DESCRIPTION OF COMPONENTS No 2 0 V during transmission 08 010 and Q11 b are set OFF during transmission 09 012 and 013 are set ON during transmission Q8 Q10 011 and 012 are set ON during reception Q8 Q13 Transmission reception power selection G9 Q11 a and O13 are set OFF during reception Q18 Modulation muting ON during reception 019 020 8T voltage selection OFF when low Q21 PLL output amplification Q2 2 Transmitting PLL output amplification Operation during transmission Q24 8 V ripple filter APC control Operation during transmission Lower power switch ON when high Q25 D ee 1 ee el s ee D7 Temperature compensation Drive D8 Overvoltage prevention D10 D13 Antenna switch ON during transmission D14 Power reverse connection protection Power detection 67 42 742 942 SEMICONDUCTOR DATA 68 Power Transistor 2SC3240 28 TX RX Unit Electrical characteristics m T ze O Power Transistor MRF492 50 TX RX Unit e characteristics Conditions Maximum value om es a Tc 25 C 250W N gt External view E E F lange Emitter External view Emitter Base Emitter 4 Collector 42 742 El942 SEMICONDUCTOR DATA Power module S AV17 144 TX RX UNIT e Equivalent circuit diagram e External view Input terminal First power
93. DTA144EU B pattern A pattern VREF B pattern A pattern 210950 TC4S11F NJM78L05UA GNO VIN 138 DTC114EU 137 651 0X2 0121 x 2 o x x eef sz were 905347 Pii 3994721 Hen 40591 21 o vem 911282 9010 999572 er MLSE LOSES 10604154 4 002HvL21 21 x x x ss s 1 9 vers 8 v v1 50 0121 12 91619952 595 237 721 394 3 11210 010 385S W WN 16228 03711249 to 36 26871 2907911 1353 Lv91vSZ 0841 10131 3 7 za fA 3117252 0176 9 ZO 521 21 mar s27 ION xX Q3sn C XX X9v amp amp 8X 9117552 1040 os601axd vowst nZ0zNvG 18 2216252 TI 4899078 82 4r0v88giivsOM 21 278 65 279 65x 1 I I I 1 1 1 I 1 I 1 1 1 1 I 1 1 1 1 I I I I I I 1 I 1 1 a 3 santons a21 46128634 Th TER veld tele 3115 DIE 50 31 Pa eed L
94. EL SCREW CASE BRAZIER HEAD TAPTITE SCREW BRAZIER HEAD TAPTITE SCREW A TM 742 K P M M2 E E2 E3 B TM 942 K P M 73 742 A 742 E 942 A x New Parts Parts without Parts No are not supplied Teile ohne Parts No werden nicht geliefert Address Parts No fi amp N89 2005 46 N99 0331 05 T07 0286 05 742 0310 25 791 0396 05 T91 0397 05 91 0398 05 WO1 0414 04 53 3460 11 53 3460 21 53 3460 22 53 3462 71 53 3462 72 54 3130 11 X57 3580 12 57 3590 12 57 3590 22 57 3592 72 490 0160 05 490 0010 05 A01 2068 03 01 2069 03 13 1601 02 A62 0197 03 462 0206 02 A62 0219 03 82 0012 02 82 0013 02 B03 0577 04 B41 0696 04 B42 2455 04 B42 3343 04 B42 3394 14 B42 3412 04 B42 3440 04 842 3554 04 B44 2163 04 B44 2165 04 B46 0410 30 B46 0422 00 B59 0466 00 B62 0287 10 B62 0288 00 B62 0345 00 72 0476 04 72 0477 04 032 0417 04 23 0657 04 0 3006 08 0 3034 05 0 3135 15 74 PARTS LIST Les articles non mentlonnes dans le Parts No ne sont pas fournis TM 742 TM 942 Description PAN HEAD SCREW RELEASE SCREW SET ACSY SPEAKER FAN MOTOR MICROPHONE MICROPHONE MICROPHONE DTMF SPANNER ACSY CONTROL UNIT CONTROL UNIT CONTROL UNIT CONTROL UNIT CONTROL UNIT DISPLAY UNIT TX RX UNIT 144M SOW TX RX UNIT 440M 35W TX RX UNIT 430M 35W TX RX UNIT 430M 35W SHEET FRO
95. EgO ram EZD 28 50 3 4 35 18 1 7 04 21 4 4 4 9 35 391 t 78 1803 45 501 1 24 36 2 8 48 581 8 80v v01 78 1u03 01 01 1 5 5 845 191 1 8 1 02 5 D 4 H E 3053912179189 333 301 t79 106 3197321 173 CIE CL ZED Tepes 2 545 501 176 09 DZD 674 1007 Ovi YW ID HEETE 13 71 E7v 1403 38 4 7Y 1802 04 1 4 4 4 4 5 7v 1N02 z gt x D s a e vet ixi 9 59 9 9 9 9 9 9 9 9 0 tes 1x3 1 h 85 54543 5 EI aan 1 SEES 5 1 127821153451 11 009 06 LINN xu ui ZHMOQZ 276 1 06 amp L x LINA Xu ui verc ns i 19950 5 1 ej Vj 24 655 15 LINN xu si ZANOS 2373 3294 amp 1 065 amp 4 LINN vZr6 wi 41 064 ES Z 08 L8X LINN tHWO VEEL LIRA 8 8 LINN xu ui fuevwis I VASO IS 50 31 17 08S LSX _ LINN Xu di 479 2 1 61 mo em s e tad Soe eee ee eee ee ee AVELOHPL OL 0221 2 be LINN 279 54162 1
96. F COMPONENTS 430 TX RX Unit X57 3590 XX No 1 Reference Second local oscillation mixer IF amplification detection low frequency amplification noise amplification noise detection and squelch switching Description D 21 6 MHz first IF input 21 145 MHz second local oscillation OV when scan control and busy signals are busy Noise detection voltage output DC Signal strength meter output Detection output AF output RD output IC2 Low frequency amplification and limiter Microphone amplifier Shift register See the circuit description 10V AVR 10v 13 8 a gt 7 9 iC6 430 MHz band transmission driver D Output input 1C7 Power module 0 V during lock Modulation input IC10 VCO PLL 12 8MHz Data input Lock voltage Clock input Enable input PLL output Q1 Q2 High frequency amplification Operation during reception First mixer Operation during reception First IF amplification Operation during reception 21 6 MHz TM 42A 742 942 DESCRIPTION OF COMPONENTS C30 Transmission reception power selection OV during transmission LO 0 V during lock Q8 09 and Q10 are set OFF during transmission Q11 and Q12 are set ON during transmission Q8 Q9 and Q10 are set ON during reception Q11 and Q12 are set OFF during reception LII lT usv PLL output amplification Q Q 17 19 Middl
97. G output 0 dBu Modulation 1KHz Deviation 3 KHz Receive Digital voltmeter SSG 1 Band pass filter BPF adjustment Distortion meter Oscilloscope 1 Frequency 28 890MHz SSG output 60 dBu Modulation 1KHz Diviation 3KHz Distortion factor adjustment Distortion meter Millivoitmeter Oscilloscope 1 Frequency 28 040MHz SSG output 9 dBu Modulation 1KHz Deviation 3 KHz Receive sensitivity check 12 dB SINAND or more Frequency 29 700 MHz SSG output 9 dBu Modulation 1KHz Deviation 3 KHz Frequency 22 040 MHz 12 dB SINAND or more SSG output 20 dBu Modulation 1KHz Deviation 3 KHz Signal 1 Frequency 28 890 MHz strength SSG output 24 dBu LEDS go on then meter Modulation 1 KHz one LED goes off adjustment Deviation 3 KHz The SSG output is 20 6 dBp Adjust the SSG output so that all signa strength meter LEDs go on 2 Frequency 28 890 MHz SSG output 25 Rear 5 Check panel SSG TX RX so that all Modulation 1 KHz Deviation 3 KHz Frequency 28 890 MHz 556 Rear EXT SP SSG output OFF panel 2 Frequency 28 890 MHz SSG output 14 dBu Modulation 1 KHz Deviation 3 KHz 3 SSG output Signal strength meter check Set the SQL control to the closing position Control position 8 00 11 00 BUSY should go out Squelch check Squelch should open and BUSY should light up SQL control fuily
98. H102K CEOQ4NW1C470M CK73FB1H102K CK73FB1E103K CEO4NW1E100M CE04NV1A330M CK73FB1E103K CK73FB1H102K CC73FCH1H100D CC73FCH1H100D CK73FB1E103K CK73FB1H102K CK73FB1H223K CEO4NW1C101M CK73EF1C1052 CK73FB1H102K 1 1052 Description BASH W CHIP C 1000PF K CHIP C 1000PF K CHIP C 0 01UF K CHIP C 0 5PF 150PF J CHIP C 3PF 0 5PF CHIP C 15PF J CHIP C 2 0PF C CHIP C 1000PF K CHIP C 6PF D CHIP C 1000PF K CHIP C 0 01UF K 5 CHIP 1000PF K CHIP C 0 01UF K CERAMIC 2PF 1000PF K CHIP 0 01UF K CHIP C 39PF J CHIP C 100PF J CHIP C 1000PF K CHIP C 0 1008 K CHIP C 1 0UF 2 0 01UF K CHIP C 1PF ELECTRO 470 16WV CHIP TAN 0 68UF 20WV ELECTRO 47UF 16WV CHIP TAN 0 47UF ELECTRG 10UF 25WV ELECTRO 47UF 16WV CHIP C 0 01UF K CHIP C 1000PF K CHIP C 1 0UF Z CHIP C 15PF J CHIP C 1000PF K CHIP C 22PF J CHIP C 1000PF K ELECTRO 470 16WV CHIP C 1000PF K CHIP C 0 01UF K ELECTRO 10UF 25WV ELECTRO 33UF 10WV CHIP 0 01UF CHIP C 1000PF K CHIP C 10PF D CHIP C 10PF D CHIP C 0 01UF K CHIP C 1000PF K CHIP C 0 022UF K ELECTRO 100UF 16WV CHIP C 1 0UF Z CHIP C 1000PF K CHIP C 1 0UF Z A TM 742 K P M M2 E E2 E3 B TM 942 K P M 83 TM 742 AJ 42 942 84 x Now Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans Parts No sont pas fournis Telle ohne Parts No werden
99. I 13 7 a CONT 103 SPSWA CONT 103 CONT 103 58 CONT 103 5 CONT 103 B 144M UNIT X57 3580 XX z o Har 6 q wevsa 610 X57 3580 XXj CDBM455C6 AM IF sr CFI CFWMaS IC6 lt 93 2SC2TI4IY 157 IF AMP R20 C23 XF i 19 7MH IC2 Lasoiom OV 10 00 1 5 BU4094BF Oly NL 3 eee 2 S91AS 0 LC e vu CONT 104 ESA CONT 104 DTA CONT 104 CONT IO4 SCA CONT 104 SQA CONT 104 RAA CONT 104 RDA 160 DTCI23JK 742 A1742 942 50M TX RX UNIT 57 3800 01 BOARD VIEW 50M TX RX UNIT X57 3800 01 Component side view Foil side view IC1 BU4094BF XRU4094BF 2 10 IC3 KCA04 KCB18 5 04 IC6 KCD04 IC7 LA5010M 1 8 19 IC9 KCD05 Q1 3SK184 S 02 35 131 12 03 8 20 2SC2714 Y 04 15 17 DTC144EK Q5 DTC144EU 06 7 25 0 114 Q9 2SJ106 GR Q10 2SA1362 Y 011 25811195 Q12 DTC144WK Q13 FMW1 014 21 24 25 2712 018 2501757 Q19 2SK208 Y Q22 FMG1 Q23 2SD1902R Q26 DTC143EK 01 2 77 D3 6 1SV228 07 9 DAN235 K 08 16 17 155184 D10 1SS181 D11 MI308 MI407 D12 MI308 013 14 155226 D15 DSA3A1 5 x 7 o IN EE 5 s lt r OFT c ore ne o o Yx
100. ITTER Less than 36 kHz RECEIVER Notes 1 Circuit and ratings are subject to change without notice due to advancements in technology 2 Recommended duty cycle 1 minute Transmit 3 minutes Reception KENWOOD CORPORATION Shionogi Shibuya Building 17 5 2 chome Shibuya Shibuya ku Tokyo 150 Japan KENWOOD U S A CORPORATION COMMUNICATIONS amp TEST EQUIPMENT GROUP P O BOX 22745 2201 East Dominguez St Long Beach CA 90801 5745 U S A KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembr cker Str 15 6056 Heusenstamm Germany TRIO KENWOOD U K LIMITED KENWOOD House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS BENELUX N V Mechetsesteenweg 418 B 1930 Zaventem Belgium TRIO KENWOOD FRANCE S A 13 Boulevard Ney 75018 Paris France KENWOOD LINEAR S P A Downloaded by 20125 Milano via Arbe 50 Italy KENWOOD ELECTRONICS AUSTRALIA PTY LTD RadioAmateur EU P O Box 504 8 Figtree Drive Australia Centre Homebush N S W 2140 Australia KENWOOD amp LEE ELECTRONICS LTD Wang Kee Building Sth Floor 34 37 Connaught Road Central Hong Kong KENWOOD ELECTRONICS CANADA INC P O BOX 1075 959 Gana Court Mississauga Ontario Canada LSS 1N9 a Ng a s
101. Ic4 D8 toattenuate the received signal before it enters Q2 FET for high frequency amplification 21 58 3840 0 C77 R75 Fig 2 Power amplifier circuit 742 742 942 CIRCUIT DESCRIPTION APC circuit The automatic transmission output control circuit APC detects and partially amplifies the power amplifier output with a diode and controls the output control voltage The control voltage is outputin inverse proportion to the output so the control voltage output is aiways constant To protect the radio against excessive tem perature rise the high power unit has a thermal switch The high power unit is automatically set to a low power by the thermal switch if it exceeds the specified tem perature during reception during transmission 28 TX RX Unit PLL Synthesizer The VCO and PLL circuits are housed in a solid shielding case as a hybrid integrated circuit Compari son frequencies are produced by dividing a 9 285 MHz reference oscillation frequency by 1857 to correspond to the 5 10 15 20 and 25 kHz channel steps For 28 MHz the relationship between fyco RX and each frequency division ratio is given by 2848 83 nx64 Alxfo JP Where f g VCO output frequency n Binary 10 bit programmable counter setting value A Binary 6 bit programmable counter setting value Reference oscillation frequency of 9 285 MHz R Binary 16 bit programmable counter setting value
102. J CHIP R 560 J 1 104 RK73FB24A103J CHIP R 10K J 0 RK73FB2A473J CHIP R 47K J 1 10W RK73FB2A471I CHIP R 470 J 1 10W R92 0670 05 CHIP R 0 OHM RK73FB2A221J CHIP R 220 J 04 RK73FB2A472J CHIP R 4 7K J 1 10W RK73FB2A2223 CHIP R 2 2K J 1 10W 7 2 334 R 330K J 1 10W RK73FB2A223J CHIP R 22K J 1 104 RK73FB2A182J CHIP R 1 8K J 1 10W RK73FB2A103J CHIP R 10K J 1 10W RK73FB2A1027 CHIP R 1 0K J 1 10W RK73FB2A103J CHIP R 10K J 1 10W RK73FB2A474J CHIP R 470K J 17108 RK73GB1J472J CHIP R 4 7K J 1 16W RK73FB2A684J CHIP R 680K J 1 108 RK73FB2A823I CHIP R 82K J 1 10 RK73FB2A331J CHIP R 330 J 1 10W RK73FB2A102J CHIP R 1 0K J 14109 RK73FB2A472J CHIP R 4 7K J 17108 RK 3FB2A102J CHIP R 1 0K J 1 10W RK73FB2A560I CHIP R 56 J 1 10W RK73GB1J271J CHIP R 270 J 1 16W RK73GB1J103J CHIP R 10K J 1 16W RK73GB1J222J CHIP R 2 2K J 1 16M RK73GB1J471J CHIP R 470 J 1 16W RK73FB2A100J CHIP R 10 J 1 10W RK73FB2A152J CHIP R 1 5K J 1 10W RK 73FB2A683J CHIP R 68K J 1 108 R92 0670 05 CHIP R 0 OHM RK 73FB24A220J CHIP R 22 J 1 10W RK73GB1J472J CHIP R 4 7K J 1 169 RK73GB1J222J CHIP R 2 2K J 1 164 RK 73GB1J471J CHIP R 470 J 1 16W RK73FB2A180J CHIP R 18 J 1 1089 R92 0670 05 R A TM 742 K P M M2 E E2 E3 B TM 942 K P M 95 TM 742 AJ742 942 PARTS LIST Parts without Parts are not supplied Les articles non mentlonnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert 1200M TX RX U
103. K73GB1H103K CHIP C 0 01UF K 7 1 1052 CHIP 1 0UF 2 92 0003 05 CHIP TAN 0 47UF 25WV CK73FB1E104K CHIP 0 10UF K 92 0504 05 0 68UF 20WV CEO4NW1C470M ELECTRO 47UF 16WV CK73FB1E103K CHIP C 0 01UF CHIP C 33PF ELECTRO 4708 16WV CHIP C 0 01UF K ELECTRO 1 0UF 16WV CHIP C 0 01UF K CC73GCH1H330J CEO4NW1CA70M CK73FB1E103K 92 0004 05 CK73FB1E103K CEO4NW1E100M ELECTRG 10UF 25WV CK73FB1E103K CHIP C 0 01UF K CK73FB1E103K CHIP C 0 01UF K CEO4NW1CA470M ELECTRO 47UF 16WV CK73FB1E103K CHIP G 0 01UF K CK73FB1H822K CHIP C 8200PF K CK73FB1H102K CHIP C 1000PF K CC73FCH1H270J CHIP C 27PF J CC73FUJ1H100D CHIP C 10PF D CK73EF1C105Z CHIP C 1 00 2 CK73FB1E103K CHIP C 0 01UF K CK73FB1H102K CHIP C 1000PF K CK73FB1E103K CHIP C 0 01UF K CEQ4NW1E100M ELECTRO 10UF 25WV CEO4NW1A330M ELECTRO 33UF 10WV CK73FB1E103K CHIP C 0 01UF K CEO4NW1A221M ELECTRO 220UF 10WV CC73FCH1HO30C CHIP C 3PF CK73FB1E103K CHIP 0 01 K CK73FB1E103K CHIP C 0 01UF A TM 742 K P M M2 E E2 E3 B TM 942 K P M 98 x New Parts 742 A 742 E 942 A PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis ohne Parts No werden nicht gellefert Ref No Address Parts No SRES M 5 C65 C66 C67 C68 69 C70 C72 C73 C74 C75 C76 C77 C79 80 C81 C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 96 97
104. KHz Deviation 3 KHz Adjust the SSG output so that ail signal strength meter LEDs go on 1 Frequency 1270 100 MHz Rear EXT SP Set the SOL SSG output Off panel control to the Modulation 1 KHz closing position Deviation 3 KHz 2 SSG output 14 dBu MOD 1 kHz DEV 3 kHz SQL controf fully clockwise 3 SSG output 3 The SSG output is 20 6 dBu 2 SSG output 2548 Control position 8 00 11 00 BUSY should go out Squelch should open and BUSY should light up Noise should disappear Squelch should open 127 742 742 942 Transmitter Section Adjustment Measurement point Adjustment point Specification Une Terminal Unit F ND Rear RX VR4 Check 11 W or more panel RX VR4 Adjust 10W 810 14 W 6 5 A or less ADJUSTMENT Maximum power check Powermeter Frequency 1270 000 MHz Ammeter Transmit 1 Power adjustment High power adjustment Frequency 1270 000 MHz Transmit TX The fan runs when the PTT switch is pressed It continues for a while after the PTT switch is released then stops i Rear ANT TX RX VR3 Adjust in the 4 0 to 5 0 KHz panel higher direction 4 2 KHz IrrI DC detector j Rear ANT Check 0 5 to 1 5 KHz Oscilloscope panel 1270 000 Frequency 1270 000 MHz 1 KHz counter Powermeter Low power adjustment Frequency 1270 000 MHz Transmit
105. Kenwood Service Corporation E51 93 035 Page 1 of 2 KENWOOD S u D le me nta r nfo Amateur Radio Division Procedure 1 Detach the front panel from the main chassis 2 Remove the bottom cover of the transcevier by removing the 4 screws on the bottom of the cover and loosening the 4 screws on the sides of the unit 3 Orient the radio so the bottom is up and the front panel area is near your chest Near the front panel area you will find a large board this is the Control Unit 4 Remove the chip resistors noted in the diagram below and reinstall them as shown Control Unit X53 346X XX A 2 5 Reinstall the bottom cover of the transceiver and reattach the front panel 6 Reset the microprocessor Press and hold the MR key while the power is switched on Then release the MR key This will erase all operator programmed data 7 The frequency range after modification will be s 28 MHz Band 18 0 thru 54 0 MHz Remove resistors 26 0 thru 45 0 MHz from these positions 50 MHz Band 40 0 thru 90 0 MHz 46 0 thru 76 0 MHz 136 0 thru 174 0 MHz 215 0 thru 260 0 MHz 215 Othru 235 0 MHz 440 MHz Band 410 0 thru 470 0 MHz 1 2 GHz Band RX TX 1100 0 thru 1400 0 MHz and install them in these positions 144 MHz Band 220 MHz Band Please note that these are theoretical ranges only Not all radio s will be Front Panel Area capable of tuning the entire range 030393 by CLM for Kenwood U S A Page 1 of 1
106. L FLAT SPRINGCAPC TR FLAT SPLING VCQ CONDUCTIVE RUBBER CN1 CN2 55 8 G02 0600 14 G02 0705 04 G02 0715 04 G02 0718 04 611 0655 04 INSULATING SHEET APC TR CUSHIONCXTAL CUSHIONCVC 22X15 CUSHIONCBPF COIL VCO PACKING G11 0661 04 613 0841 04 G13 1319 04 G13 1337 04 653 0508 04 SPACER FINAL DC CORD BUSHING 230 0583 14 J42 0471 04 FILTER L79 1013 05 CERAMIC FILTER CFWM455F L72 0372 05 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 105 742 742 942 106 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Telle ohne Parts No werden nicht gellefert 50 TX RX UNIT X57 3800 01 Ref No Address Parts No PMES t L1 Description B amp L34 4281 05 COTL YELLOW L2 4 L34 4283 05 CQIL WHITE Ls L34 4251 05 COILCIST IF L6 L40 1582 19 SMALL FIXED INDUCTGR O 15UH L40 1001 19 SMALL FIXED INDUCTGR 1QUH CSIL 6 5T SMALL FIXED TNDUCTOR O 47UH SMALL FIXED INDUCTOR O 18UH COIL 2 5T COIL 8 5T L34 1347 05 L40 4782 19 140 1882 19 L34 1344 05 L34 1354 05 COIL 8T COIL aT COIL 4T COIL 20 8T CSIL 5 5 L34 1352 05 L34 1345 05 L34 1346 05 L34 1364 05 L34 1349 05 COIL 5 57 SMALL FIXED INDUCTGR 10UH CSIL 6 5T SMALL FIXED INDUCTOR 10UH SMALL FIXED INDUCTSR CO 1508 L34 1348 05 L33 0742 05 L34 1347 05 L40 1001 19 L40 1582
107. L TRNSISTOR DIGITAL TRNSISTOR SUB UNIT 50M 504 742 K P M2 E2 942 K P x New Parts PARTS LIST Parts without Parts No are not supplied Les artictes non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert Address TM 42A 742 E 942 50 SUB UNIT X58 3840 03 220M TX RX UNIT 57 3810 10 Description 50 SUB UNIT X58 3840 03 CC73FCH1H391J CC73FCH1H221J CK73FB1H471K CM73F2H910J 134 1357 05 L40 1001 19 25 1972 MRF492 A10 1316 11 B42 2437 04 CC73FCH1H030C CK73FB1H102K CC73FCH1HORSC CC73FCH1H560J CC73FCHIHORSC CC73FCHIH1207 CC73FCH1H120J CK73FB1H102K CC73FCH1HO60D CK73FB1H102K CC73FCH1HO60D CK73FB1E103K CK73FB1E103K CC4SSL2HO30C CK73FB1H102K CK73FB1E103K CC73FCH1H150J CK73FB1H102K CK73FB1E104K CK73EF1C105Z CK73FB1E103K CEO4NW1C4 70M C92 0504 05 CEOANW1CA470M C92 0003 05 CEO4NW1CA70M CK73FB1E103K CK73FB1H102K CK73EF1C105Z CC73FUJ1H150J CK73FB1H102K CC73FUJ1H200J CK73FB1H102K CEOQ4NW1C470N CK73FB1H102K CK73FB1E103K CEQ4NW1E100M CE04NW1A330M CK73FB1E103K CHIP C CHIP C CHIP C CHIP C COIL 2T 390PF 220PF 470PF 91PF SMALL FIXED INDUCTOR 10UH TRNSISTOR TRNSISTOR CHASSIS 220M TX RX UNIT X57 3810 10 LABEL S NO UNIT CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CERAMIC gt
108. L circuit pin functions TM742A 742E1942A CIRCUIT DESCRIPTION 50 TX RX Unit Frequency Configuration The 50 MHz unit incorporates a variable frequency oscillator VFO based on a phase locked loop PLL synthesizer system that allows a channel step of 5 10 15 20 or 25 kHz to be selected The frequency in the receive signal channel is mixed witha first local oscillation frequency of 60 595 64 590 MHz to produce a first in 50 53 995 MHz 50 53 995 MHz termediate frequency IF of 10 595 MHz This frequency is then mixed with a second local oscillation frequency of 11 05 MHz to produce a second IF of 455 kHz This is called a double conversion system The signal in the transmission channel is produced by direct oscillation and is frequency divided by a PLL circuit amplified by a linear amplifier then transmitted 455 KHz MCF 10 595 MHz MIX IF DET 11 05 MHz Fig 5 Frequency Configuration 50 TX RX Unit Receive Signal Channel e Outline The received signal by the antenna passes through a low pass filter in the final transmission stage and then through transmission reception selection diode switch to the receiving front end The signal then passes throughan antenna matching coil and is amplified to high frequencies by a GaAs gallium arsenide field effect transistor The unwanted components of the signal are eliminated by a bandpass filter consisting of a three stage variable capacitor The resultin
109. LIST No Bars Pase Description __ mation marks A02 0898 08 CASE FRONT A02 0901 08 CASE REAR E30 3006 08 CURL CORD ASSY G13 0933 08 CUSHION UP DWN 29 3165 08 KNOB PTT 29 3167 08 KEY DTMF K29 3168 18 KNOB UP K29 3169 18 KNOB DOWN 559 1409 28 SWITCH ASSY UP DWN 540 1437 08 TACT SWITCH UP DWN 550 1431 08 MICRO SWITCH PTT 31 1422 08 SLIDE SWITCH LOCK 91 0393 08 MICROPHONE ELEMENT KENWOOD 1 n SCHEMATIC DIAGRAM On ON Shield pe fModuer _____ Blue 8P Plug m cn Yellow Uis 242 Green O UP E mM 1 57 58 1 Sw2 1 LOCK III ITT 17 T wack onol SHIELD a MEE CALL VFO IMR PF ote 18 RI5z RIG Ce V 1 R3 147 ob ILR 40872 EE R N 5 V 22K 22K 100K 470m YELLOW 816 R4 1 2 3 A 1 14 k Ri c6 E 2 2 1 4593 tee toe H5 ls I toe 45 tel c5 2 2 2K 5 b 9 i I L 180 TM 742 742 E 942 UT 28S 50S UT 220S 1200 SPECIFICATION Frequency renge 28 99 50 220 225 31240 1300 FEM 20 C DC13 8V 15 11 7 15 8V Negativ
110. M 742A UT 28S UT 50S UT 1200 TM 742E 0 285 UT 50S UT 1200 KENWOOD Se rvi ce B u leti n Amateur Radio Division Subject TM 642 742 942A Microprocessor Change Date March 28 1994 This bulletin supercedes ASB 1033 Symptom Reports of problems with microprocessor lock up when using S meter squelch problems with storage recall of PL tone frequencies of 203 5 Hz and or 114 8 Hz or problems with a lack of transmit on the UHF band modules during Remote operation can be corrected using the changes noted in this bulletin Notes 1 All TM 642A transceivers work fine and do not require any changes 2 TM 742 942 s that exhibit any of these symptoms with serial numbers between 412XXXX and 509XXXX need only change IC1 on X53 3460 21 B 2 3 TM 742 942 s that exhibit any of these symptoms with serial numbers of 412XXXX and below must also change IC1 on X54 3130 11 4 TM 742 s with serial numbers of 509XXXX and greater have had these changes incorporated in production 5 Some TM 742 s and TM 942 s below serial number 509XXXX have been returned to Japan for modification and have been placed back into A Stock If the unit that you have has a black dot on the box near the serial number it has already been modified and requires no further action Parts Required Qty Description Old Part No New Part No Circuit Description 1 Microprocessor HD6433388A07F or HD6433388A14F HD6433388A22F IC1 1 Microprocessor HD404719A26H HD404719A
111. N BEEP MUTE BAND 0 MUTE OFF 1 MUTE ON BAND Unit A busy input 0 BUSY 1 CLOSE BNAD Unit B Busy input 0 BUSY 1 CLOSE BNAD Unit C Busy input 0 BUSY 1 CLOSE BAND Unit A shift Register Enable BAND Unit A PLL Shift Register Data 1 BAND Unit A PLL Shift Register Clock 1 BAND Unit A PLL Enable d BAND Unit B Shift Register Enable BAND Unit B PLL Shift Register Data 2 BAND Unit PLL Shift Register Clock 2 BAND Unit B PLL Enable 2 D Unit Shift Register Enable D Unit C PLL Shift Register Data 3 D Unit C PLL Shift Register Clock 3 ND Unit C PLL Enable 3 33 42 A 742 El942 CIRCUIT DESCRIPTION CXD10950 I O PORT LIST Circuit terminal Port Backup Content name Shift Register HD74HC165F S L terminal PEO 0 Latch asynchronous with clock LOAD165 1 Latch at loading edge of clock AF MUTE BAND A 1 0 OFF 1 MUTE AF MUTE BAND PE2 0 MUTE OFF 1 MUTE ON AF MUTE BAND 0 MUTE OFF 1 MUTE ON 1 2 3 Types of band units BAND Unit NOTE X is A B or C The number after conversion is used on the program EP X Number after DT X Unit No conversion 1 1 1 1 1 o NNI 184 Ls s 1 CTC1 CTCSS opcration unit DTS2 DTS1 DTSS operation unit NON M Downloaded by Detected output connection unit RadioAmateur EU 34 TM 742 742 E 942 CIRCUIT DESCRIPTION TERMINAL LIST OF CLOCK IC S 3520CF CONTROL U
112. NIT X53 346X XX SERIAL TIME CLOCK S 3520CF IC6 inal H8 337 pug connection 9 terminal name Synchronous signal input terminal of serial 1 8 clocks cycle Serial address data input terminal Entry of address of counter or address data of register RAM Serial address data output terminal Write selection terminal WR L Write WR Read Chip select terminal CS L Selected state CS H Sout gets at high impedance state System power supply leading edge check signal Connected to power down detection circuit Stuck at when PDW is not used Access disable irrespective of CS when fixed PSW 41 Sout TPout get at high impedance state Reference signal output terminal 1 Hz 1024Hz switching output Control Unit X53 346X XX 6 S 3520CF The contents of the counter and the register can be ADDRESS CORRESPONDENCE LIST read and rectified by handling the 4 bit address and data Address Clock mode as a set The addresses are allocated as shwon in the A3 to A0 MODE 0 table below REGISTER CONTROL MODE SETTING REGISTER Switches the clock mode and the SRAM mode and 0011 10 minute column counter resets the system mera MODE SETTING REGISTER MODE 1111 D3 D2 D1 DO 10 h our column counter Day of the week counter 0 fixed Clock mode selected 1 day column counter unn 00 entered 1 month column counter SYSR is used to clear the counter and the register The system is re
113. NIT X57 3600 11 Description amp RK73FB2A333J CHIP R 33K R92 1201 05 SILID 220 R92 0670 05 CHIP R 0 OHM R92 1264 05 FIXED RESISTOR RK73FB2A472J CHIP R 4 7K R92 0700 05 CHIP 180 RK73FB2A470J CHIP 47 RK73FB2A222J CHIP 2 2K 92 0670 05 CHIP RK73GB1J271J CHIP RK73FB2A103J CHIP RK73FB2A471J CHIP R92 0670 05 CHIP RK 3FB2A4R7J CHIP R 4 R12 6429 05 TRIMMING PGT R12 6421 05 TRIM POT R12 6427 05 TRIM POT 12 6423 05 TRIM POT R12 6427 05 TRIM POT MA862 DIQDE 716 DIODE 155193 DIODE 02CZ6 2 X Y DIGDE 155193 DIODE 155187 DIODE 02CZ12 X Y DIODE HSK151 DIODE MI808 DIODE DSA3A1 DIGDE 02C23 6 Y 2 DIGDE DAP202U DIODE MI808 DIODE KCD04 IC FM IF KCX03 ICCAUTS LOCK TUNING ALT 04 IC MIC AMPLIFIER BU4094BF IC SHIFT STORE REGISTER XRU4094BF IC SHIFT STORE REGISTER LASOO9M IC LOE SATURATION REGULATOR KCBO9 IC 1200MHZ PRE DRIVE KCB10 IC PGWER AMP KCCO4 IC APC M67711 IC PGWER MGDULE 1 24 1 3BHZ KCH03 IC 1 2GHz VC8 PLL NJM78LOSUA IC VGLTAGE REGULATGR 45V RC78LOSUA IC MGF1502 IC 2SC4095 R47 6 TRANSISTOR 35 184 5 FET 2SC3356 TRANSISTOR 28C3120 TRANSISTOR 28A1362 Y TRANSISTOR 2581302 5 TRANSISTOR DTC144WK DIGITAL TRANSISTGR FMW1 TRANSISTOR A TM 742 K P M M2 E E2 E3 B TM 942 K P M 96 New Parts Parts without Parts No are not supplied 42 742 El942 A PARTS LIST Les articies non mentionnes dans le Parts No ne sont pas fournis
114. NT GLASS SHEET CFPC METALLIC METALLIC CABINET BOTTOM FRAME PANEL ASSY UPPER PANEL BODY LOWER UPPER LOWER PANEL ASSY BACK PANEL BACK PANEL DRESSING PLATE CAUTION LABEL LABEL M4x8 MAX LABEL S N0 LABEL FCC LABEL SP LABEL SP LABEL 2 6 5 MAX UPC CODE LABELC ITEM CARTON UPC CODE LABEL QUTER CARTON WARRNTY CARD WARRNTY CARD SUB INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL FRANCE MODEL NAME PLATE 942A MODEL NAME PLATE 942A STOPPER TERMINAL CURL CODE DC CODE CACSY CONNECTING WIREC PANEL A TM 742 K P M M2 E E2 E3 B TM 942 K P M 42 AJ 42 942 x New Parts Parts without Parts No are not Les articles non mentionnes dans Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Description Bh asm W Ref No SRS Address Parts No t E 2 7 0006 05 7 0325 05 7 0326 05 01 0992 03 01 0993 04 07 1203 13 07 1232 04 07 1345 04 51 0017 05 51 0018 05 G01 0833 04 602 0505 05 G02 0716 04 G10 0663 04 G10 0686 04 G10 0700 04 G11 0680 03 G11 0681 13 611 0688 04 G11 0690 14 653 0508 04 10 2696 12 11 0856 24 11 0857 24 13 0861 04 13 0901 04 13 0897 04 25 0029 04 25 0079 04 25 0723 04 25 0750 04 52 0334 04 52 0335 04 62 0291 04
115. NW1C101M ELECTRO 100UF 16WV c 0 CK73FB1H471K CHIP C 470PF K C61 CE04NW1A330M ELECTRG 33UF C62 63 CK73FB1E103K CHIP C 0 01UF K C64 1 101 ELECTRO 100UF 16WV C65 CC73GCH1H030C CHIP C 3PF C66 CC73GCH1H101J CHIP C 100PF C67 CC73GCH1H020C CHIP C 2 0PF C69 CC73GCH1H101J CHIP C 100PF C70 CC73GCH1H050C CHIP C SPF C71 CK73EF1C105Z CHIP C 1 C72 CEOANW1E100M ELECTRO 10UF SWV C73 CK73FB1H471K CHIP C 470PF 75 CK73GB1H471K CHIP C 470PF C76 CK73FB1H471K CHIP C 470PF C77 CK73FB1E103K CHIP C 0 01UF 78 CK73FB1H471K CHIP C 470PF C81 CK73EF1C105Z CHIP C 1 0UF C82 83 CK73FB1H471K CHIP C 470PF C84 CK73FB1H471K CHIP C 470PF C85 CEO4NW1E100M ELECTRO 10UF SWV C86 CK73EF1C105Z CHIP C 1 0UF C87 CK73GB1H471K CHIP C 470PF C89 90 CK73FB1H471K CHIP C 470PF C91 CEQ4NW1C470M ELECTRO 47UF 6WV C92 CC73FCH1H470J CHIP C 47PF c93 CK73FB1H471K CHIP C 470PF C95 CC73FCH1H010C CHIP C 1PF C96 CC73FCH1H100D CHIP C 10PF C97 CK73FB1H471K CHIP C 470PF C98 CM73F2H470J CHIP C 47 C99 CC73FSL1H101J CHIP C 100PF C100 CK73FB1E103K CHIP C 0 01UF C101 CC73FCH1H080D CHIP C 8PF C102 104 CK73FB1H471K CHIP C 470PF C105 CC73FCH1HR758 CHIP C 0 75 C106 CK73FB1H471K CHIP C 470PF C107 CC73FSL1H101J CHIP C 100PF J C108 110 CK73FB1H471K CHIP C 470PF K C111 CC73FSL1H101J CHIP C 100PF J C112 CK73FB1H471K CHIP C 470 K C113 CK73FB1H102K CHIP C 1000PF K A TM 742 K P M M2 E E2 E3 B TM 942 K P M 93 742 742
116. O STA Oe 1 07 STA is used to check the end around carry of the time and the calendar It is stuck at 717 when end around carry is in progress and at 70 when there is end around carrry DET is used to check the power ON clear detection It is stuck at 71 when power ON clear is detected and at 0 in th ordinary mode LIST OF TERMINALS OF THE PARALLEL SERIAL CONVERTER IC PARALLEL IN SERIAL OUT CONTROL UNIT X53 346X XX 8 bit Shift Register HD74HC165F IC7 Terminal No 0 Destination bit 0 1 Destination bit 1 82 0 Destination bit 0 1 Destination bit 717 Serial data output terminal Serial data input terminal PL RPT G 5 P_FANDL 0 No repeater function 1 Repeater function 36 Data shift load selection terminal S L 717 Data entered in the 8 inputs A to H are stored in the vari 1 S L ous registers asynchronously with the clock S L H Successive shift operations are carried out at the leading edge of the various flip flops CLOCK Data shift synchronization signal input terminal Parallel input terminal bit 3 Destination data bit 3 Parallel input terminal bit 2 Destination data bit 2 B Parallel input terminal bit 1 Destination data bit 1 12 P B1 0 Destination bit O 1 Destination bit 717 Parallel input terminal bit 0 Destination data bit 0 0 Destination bit 0 1 Destination bit 717
117. O CONNECT CTCSS DETECT O Tone coincidence 1 No tone coincidence Mic MUTE 0 MUTE OFF 0 MUTE ON CONTROLLER CHECK 1 NEW KENWOOD BUS RD NEW KENWOOD BUS SO 0 Mic PTT 1 NEW KENWOOD BUS SI 1 Shared with Mic DOWN terminal ANO NEW KENWOOD BUS Clock 1 Shared with Mic UP terminal 1 Operation of REPEATER 0 ON function 1 OFF Clock reference signal input S 3520 TPout Power check 0 During backup 1 During operation External RAM I O Expander read control signal O External read 1 Inhibit Externla RAM I O Expander write control signal O External read 1 Inhibit Circuit Terminal A Pull up only when checked by software Care must be taken because ET is stuck at H during check Pull up only when stuck at H during input with software e A Pull up with hardware Pull down with hardware 32 su UN TM 42A 742 942 CIRCUIT DESCRIPTION I O EXPANDER PORT SPECIFICATION LIST CONTROL UNIT X53 346X XX CXD 10950 1 O PORT LIST 101 FAN ON OFF 0 OFF 1 ON Power switch other than 5C 0 OFF 1 ON Volume squelch HIC Data VOLSQDA Volume squelch HIC Clock VOLSOCK Squelch Enable 0 No change 1 Data fetched in latch SUES us tu Electronic volume 2 Enable Data latch at 1 0 VOLCSA Electronic volume 1 Enable Data latch at leading edge 1 0 VOLCSB BEEP MUTE BAND A 0 MUTE OFF MUTEA 1 MUTE ON BEEP MUTE BAND C 0 MUTE OFF 1 MUTE O
118. ODULE SHIELDING COVER MODULE K K K J J 470PF K 470PF K 0 01UF K 470 K 0 01UF K 470PF K 9 47UF 6 100 J K K J J K K J 0 10UF 470PF 100PF 100PF 1000PF 1000PF 100PF C Oc000 OOOmO PHONE JACK SHIELDING CASE FLAT SPRINGCIC FLAT SPRING ANT SHEET VCG 30X20 SHEET CN1 CN2 55X8 SHEET VCG 25X10 INSULATION SHEEON FORMED PLATE NON WEVERN FABRIC DC CORD BUSHING FILTER CERAMIC FILTER FILTER COIL MCF COIL VXO SMALL FIXED INDUCTOR O 39UH SMALL FIXED INDUCTGR O S6UH CRYSTAL RESGNATGR 59 245MHZ TCXO 12 8MHZ SCREW BRAZIER HEAD TAPTITE SCREW FLAT HEAD TAPTITE SCREW A TM 742 K P M M2 E E2 E3 B TM 942 K P M TM 42A 742 E 942 PARTS LIST Parts without Parts No are not supplied Les articles mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert 1200M TX RX UNIT X57 3600 11 Ref No Address Parts No SMFS OG E 5 Description RK 73FB2A222J CHIP R 2 2K J 1 10W RK73FB2A473J CHIP R 47K J 1 10 RK73GB1J473J CHIP R 47K J 1 16W RK73FB2A560J CHIP R 56 J 1 10W RK73FB2A221J CHIP R 220 J 1 10 RK73FB2A472I R J RK73FB2A153J R J RK73FB2A471J R J R92 0670 05 R RK73GB1J180J R J RK 3FB2A101J R J RK73FB2A331J R J RK73FB2A100J R J 73 24151 R J RK73FB2A101J R J R92 0670 05 R RK73FB2A331J CHIP R 330 J 1 10W RK73FB2A224J CHIP R 220K J 14109 RK73FB2A561
119. ORSC 73 2 0500 CC73FCH1HO20C CK73FB1E103K CC73FCH1H150J CK73FB1H102K CEO4NW1E100M CC73FCH1H010C CEO4NW1E100M CC73FCH1H470J CK73FB1H102K CK73FB1E103K CK73FB1H223K CC73FCH1HA470J CC73FCH1H390J CK73FB1H102K CK73FB1E103K CEOA4NW1A221M CC73FSL1H100D CC73FSL1H101J CC73FCH1HO60D CEO4NW1E100M CC 73FSL1H101J CK73FB1H102K 04 1 102 CC73FCH1HO70D CC73FCH1H100D CK73FB1E103K CK73FB1H102K CC73FCH1HO10C C05 0371 05 E30 3009 15 E72 0406 04 40 5461 05 11 0442 05 23 0619 05 CHIP ELECTRO CHIP C CHIP C CHIP C CERAMIC CHIP C CERANIC CERAMIC CHIP C CHIP C CHIP C CERAMIC CERAMIC CHIP CHIP CHIP CHIP CHIP CHIP CHIP ELECTRO CHIP C ELECTRO CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP C ELECTRO CHIP C CHIP C CHIP C ELECTRO CHIP C CHIP C ELECTRO CHIP CHIP CHIP CHIP CHIP TRIM CAP ANT CABLE 220M TX RX UNIT X57 3810 10 Description 1000PF 10PF 0 01UF 1000PF 0 022UF 100UF 1 0UF 1000PF 1 0UF 18PF 1000PF 1000PF 4 0PF 0 5PF 0 5PF 2 0PF 22PF 18PF 1000PF 0 5PF 5 0PF 2 0PF 0 01UF 15PF 1000PF 10UF 1PF 10UF 47 1000PF 0 01UF 0 022UF 47 39PF 1000PF 0 01UF 220UF 10PF 100PF 6PF 10UF 100PF 1000PF 1000UF 7 10PF 0 01UF 1000PF 1PF 2 x Ce Aon TERMINAL BOARD PIN ASSY 12P PHONE JACK TERMINAL
120. P R 100 J 1 100 92 0670 05 CHIP R 0 OHM 73 2 1 821 CHIP 1 6K J 1 10W RK73FB2A103J CHIP R 10K J 1 10W RK73FB2A182J CHIP R 1 8K J 1 10W RK73FB24A223J CHIP R 22K J 1 10 RK73FB2A273J CHIP R 27K J 1 10W RK73FB2A473J CHIP R 47K J 1 1009 RK73FB2A472J CHIP R 4 7K J 1 10W 92 0670 05 CHIP R 0 OHM RK73FB2A223J CHIP R 22K J 1 10 RK73FB2A124J CHIP R 120K J 1 10W RK73FB2A473J CHIP R 47K J 1 10W RK73FB2A471J CHIP R 470 J 17108 RK73FB2A104J CHIP R 100K J 1 10W RK73FB2A105J CHIP R 1 0 J 1 10 RK73FB2A473J CHIP R 47K J 1 10W 92 0670 05 0 OHM RK73FB2A103J CHIP R 10K J 1 10 RK73FB2A471J CHIP R 470 J 1 10W R92 0670 05 CHIP R 0 OHM RK73FB2A222J CHIP R 2 2K J 1 10W R92 0670 05 CHIP R 0 OHM RK73FB2A122J CHIP R 1 2K J 1 10W RK73FB2A220J CHIP R 22 J 1 10W RK73FB2A470J CHIP R 47 J 1 10W R92 0670 05 CHIP R 0 OHM RK73FB2A104J CHIP R 100K J 1 10W R92 0670 05 CHIP R 0 OHM RK73FB2A103J CHIP R 10K J 1 1049 R92 0670 05 CHIP R 0 GHM R92 1213 05 CARBGN 100 J 1 20 RK73FB2A223J CHIP R 22K J 1 10W RK73FB2A471J CHIP R 470 J 1 10W R92 0685 05 CHIP R 22 J 1 20 R92 0670 05 CHIP R 0 OHM R92 0670 05 CHIP R 0 OHM RK73FB24A332J CHIP R 3 3K J 1 10W RK73FB2A221J CHIP R 220 J 0 RK73FB2A473 CHIP R 47K J 1 10W R92 0679 05 CHIP R 0 OHM RK73ZFB2A1047 CHIP R 100K J 1 10W RK73FB24A103J CHIP R 10K J 1 10 RK73FB2A102J CHIP R 1 0K J 1 10W R12 6429 05 TRIM POT 100K 12 6427 05 R12 6423 05 R12 6423 05 TRIM POT 47K TRIM POT
121. RK73FB2A271J RK73FB2A680J RK73GB1J104J RK73GB1J682J RK73GB1J154J RK73GB1J470J RK73GB1J103J RK73GB1J104J RK73GB1J100J RK 73FB2A101J RK73FB2A473J RK73FB2A102J RK73FB2A223J RK73GB1J152J RK73FB24A101J RK73FB2A472J RK73FB24391J RK73FB24A563J RK73FB2A223J RK73FB2A331J RK73FB2A334J RK73FB24222J RK73FB2A274 RK73FB24101J 73 24 221 73 24103 7 RK73FB2A104J RK73FB2A473J RK73FB2A471J RK 73FB2A472J RK73FB24103J RK73FB2A474J RK73FB2A103J RK73FB2A223J RK73FB24A273J RK 3FB2A182J RK73FB2A103J RK73FB2A182J RK73FB2A184J RK73FB24A223J RK73FB2A103J RK73FB24A223J RK73FB2A102J RK73FB2A473J RK73FB2A471J RK73FB24105J RK73FB2A104J RK73FB2A103J RK73FB24222J RK73FB2A102J 8 732824122 RK73FB2A220J R92 0670 05 RK73FB2A104J RK73FB24A221J Description 270 1 10W CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHTP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP 7D 20 20 20 20 70 20 2D 20 gt DDd 20 20 20 2000 29 20 2020 20 20 20 CHIP CHIP CHIP 28 cO CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP 70 20 20 20 3 CHIP CHIP CHIP OD TD gt CHIP CHIP CHIP 70 20 20 20 2 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 101 42 A 742 El942 102 x New Parts Parts without Parts No are not suppiled PARTS LIST Les arti
122. RK73FB2A472J R40 RK73FB24103J R41 RK73FB2A474J R42 RK73FB2A103J R43 RK73FB2A223J R44 RK 3FB2A273J R45 RK73FB24182J R46 RK73FB2A103J R49 RK73FB2A182J RSQ RK73FB2A154J R51 RK 3FB2A223J R52 RK73FB2A103J R53 RK73FB2A223J R54 55 RK73FB24102J R56 58 RK73FB24A473J R59 60 RK73FB2A470J R61 RK73FB2A105J R62 RK73F824472J R63 RK73FB24A183J 0 20 20 CO 02022 2020 0 0 20 20 2 20 20 R64 65 RK 73FB2A222J R66 RK 3FB2A102J R67 RK73FB2A122J R68 RK73FB2A220J R69 R92 0670 05 J J J J J J J J J J J J J J J J J J J J J J J J J J J J J R70 RK73FB2A104J R72 RK73FB2A471J R73 RK73FB2A1 203 R74 RK73FB2A471J R75 RK73FB2A470J R76 RK73FB2A4723 R77 R92 1213 05 R78 79 RK73FB2A223J R80 R92 0685 05 R81 RK 73FB2A222J R82 RK73GB1J332J R83 RK73FB2A471J R84 R92 1215 05 R86 R92 1252 05 R88 RK73FB2A102I Oy DC R90 RK73GB1J105J R93 94 R92 0670 05 R95 R92 0679 05 R96 98 R92 0670 05 R99 R92 1217 05 20 23 20 20 gt R100 103 R92 0670 05 R104 RK73FB2A472J R105 106 R92 0670 05 R108 RK73FB2A102J R109 RK73GB1J473J OOOO A TM 742 K P M M2 E E2 E3 B TM 942 K P M 107 742 742 E042 108 x New Parts Parts without Parts No are not supplled Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert R110 R111 R112 114 VR
123. RRANTY CARD SUB INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL INSTRUCTION MANUAL FRANCE MODEL PLATE TM 742A MODEL NAME PLATE TM 742A MODEL NAME PLATE TM 742E STOPPER TERMINAL CURL CORD DC CORD CACSY CONNECTING WIRE CGMMGN PANEL CONNECTING WIRE SPEAKER FLAT CABLE 16P CONNECTING WIRE FAN HEAT SINK COMMON AVR SP HEAT SINK COVER FAN COVER PANEL UPPER COVER PANEL LOWER SHADE PLATE 8 KEYS FUSE 15A ACSY FUSE 20A DC CORD COMPRESSION SPRING LEAF SPRING VGL KNGB FLAT SPRING SPEAKER NON WOVEN FABRIC 100X85 A TM 742 K P 2 E E2 B TM 942 K P M 742 A 742 E 942 x New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht gellefert Description amp ASM Ref No Address Parts No ERES m E aS 52 ozz 2 610 0686 04 G10 0700 04 G10 0709 04 G10 0724 04 G11 0680 03 G11 0681 13 G11 0688 04 G11 0690 14 G53 0508 04 H10 2696 12 11 0856 24 H11 0856 24 H11 0857 24 H11 0857 24 H13 0861 04 H13 0897 04 H13 0901 04 H13 0901 04 H25 0029 04 H25 0079 04 H25 0723 04 H25 0750 04 H25 0750 04 52 0370 04 52 0371 04 52 0372 04 62 0323 04 62 0324 04 120 0319 24 J21 4308 14 J21 4352 03 J21 4404 04 J21 4405 04 J29 0454 03 J42 0452 05 K29 4805 04 K29 480
124. T FAN CABLE POLYSTYRENE FOAMED FIXTURE PROTECTION BOARD PROTECTION BAG 60X110 PROTECTION BAG 200X350 ITEM CARTON BOX PACKING CASE RING SCREW SET TX RXUNITC220MHZ 258 UT 1200 CAUTION LABEL ADJUST LABEL S NG LABEL S NG ITEM CARTON BOX LABEL FREQUENCY INSTRUCTIGN MANUAL TERMINAL SHEET FAN CABLE POLYSTYRENE FGAMED FIXTURE PROTECTION BOARD PROTECTION BAG 60X110 A TM 742 K P M M2 E E2 E3 B TM 942 K P M x New Parts Parts without Parts No are not supplied ohne Parts No werden nicht geliefert Address New Parts No Parts fr H25 0760 04 H52 0112 04 H62 0101 04 J69 0325 05 99 0355 15 57 3600 11 742 742 E 942 PARTS LIST Les articles non mentlonnes dans le Parts No ne sont pas fournis UT 1200 Description PROTECTION BAG 200X350 ITEM CARTON BOX OUTER CARTON BOX RING SCREW SET TX RX UNIT 1200 2 10W A 742 K P M2 2 B TM 942 K P M 115 742 Al742 E 942 116 5 5x6 HEXAGON NUT M3 x 30 M3x40 M2 6x6 M2 6 x6 OC M2 6 x 4 M2 6x5 M2 6 x6 NOS 2084 05 NIO 2030 46 N30 3030 46 30 3040 46 N32 2606 46 1 N33 2606 45 1 N33 2614 46 N80 2605 45 1 6 2606 45 EXPLODED VIEW TM 742A E TM 742A E TM 942A Dx2 TM 942 742 42 AITA2 942 EXPLODED VIEW 1 0
125. T voltage input Detection input squelch circuit Table 20 Pin functions as viewed from the control unit E E s L when squelch input is busy e Bandretrieval The control unit is pulled down as shown in Figure 57 Each band is retrieved through the EP CK and DT Therefore the DT CK and EP pins are set low when no pins Data is input for retrieval when the power is band unit is connected Pins set high as listed in Table switched on and when the memory is cleared Data is 21 are pulled up when any band unit is connected The then output again type of connected band unit is then judged _ TX RX UNIT CONTROL UNIT EPB cell J IBI I J i MEL IC101 PD2 PD1 R15 Table 21 Band Retrieval 50 Fig 57 Retrieval System TM 742 Al742 942 DESCRIPTION OF COMPONENTS CONTROL UNIT X53 346X XX No 1 Operation condition interchangeability IC1 Refer to circuit description IC4 For chip selector expander For chip selector SRAM IC6 Refer to circuit description IC7 Refer to circuit description For DTHF receiver Mic amplifier DTMF modulation system adder Refer to the circuit description Refer to the circuit description IC13 14 Serial data inverter buffer For serial data Analog switch For switching during backup RD WR IC16 Analog switch For switching during backup CK 01 expander Refer to the circuit description IC102 8V AVR 3 term
126. TGR 33NH CRYSTAL RESONATOR 12 8MHZ CRYSTAL RESONATOR 30 37MHZ CRYSTAL FILTER 30 825MHZ SCREW MODULE BRAZIER HEAD TAPTITE SCREW FLAT HEAD TAPTITE SCREW RK73FB2A333J CHIP RK73FB2A104J CHIP RK73FB2A101J CHIP RK73FB2A103J CHIP RK 3FB2A101J CHIP 33K 100K J 1 108 J 1 10W 100 J 1 10W 10K J 1 10W 100 J 1 10W J J J J RK73FB2A104J CHIP RK73FB2A473J CHIP RK73FB24103J CHIP RK73FB24151J CHIP R92 0670 05 CHIP 100K 47K 10K 150 0 OHM 1 10W 1 10W 1 10 1 10W 20 RK73FB2A122J CHIP RK 3FB2A471J CHIP RK 3FB24A101J CHIP RK73FB2A103J CHIP RK73FB2A473J CHIP 1 2K 1 10W 470 J 1 104 100 1 10W 10K 1 10W 47K 1 10W 29 2020 20 2 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 111 TM 742 A 742 E 042 112 x New Parts PARTS LIST Parts without Parts No are not supplied Les articles mentionnes dans le Parts No ne sont pas fournis Telle ohne Parts No werden nicht geliefert Ref No Address Parts No SRES 73 2 103 RK73FB2A394J RK73FB24103J R92 0670 05 RK73FB2A222J RK73FB2A101J R92 0670 05 7 2 1827 RK73FB2A103J RK73FB2A182J RK73FB2A223J RK73FB2A273J RK73FB2A473J RK73FB2A4725 R92 0670 05 RK73FB2A223J 7 2 124 7 2 4737 RK73FB2A471J RK73FB2A104J RK73FB2A105J R92 0670 05 RK73FB2A103J RK73FB2A471J 92 0670 05 RK73FB2A222J R92 0670 05 RK73FB2A122J RK73FB2A220J RK73FB2A102J R92 0670 05 RK73F
127. TUF CK73FB1H102K CHIP 1000PF CK73FB1H822K CHIP 8200PF lt 1000PF 1 0UF 18PF 1000PF 6PF CK73FB1H102K CHIP CK73FF1C105Z CHIP CC73FUJ1H180J CHIP CK73FB1H102K CHIP CC73FCH1H060D CHIP CK73FB1H102K CHIP 1000PF CC73FCH1H150J CHIP 15PF CK73FB1H102K CHIP 1000PF CEO4NW1C101M ELECTRO 100UF CK73FB1H102K CHIP C 1000PF CEO4NW1A330M ELECTRO 33UF CK73FB1H102K CHIP C 1000PF CEO4NW1C101M ELECTRG 100UF CK73FB1H102K CHIP C 1000PF CEO4NW1C220M ELECTRO 22UF oo x C gt ORRUNK gt lt CK73FB1H102K CHIP 1000PF CK73FB1H102K CHIP 1000 CM73F 2HOSOD CHIP 5 CM73F2H060D CHIP 6 0PF CM73F2H060D CHIP 6 0PF CC73FCH1HO70D CHIP C CC45SL2H150J CERAMIC 15PF CC45SL2H220J CERAMIC 22PF CC45SL2H2207 CERAMIC 22PF CC73FCH1HORSC CHIP C 0 5PF 1 020 CHIP 2 0PF CC45SL2H080D CERAMIC 8 0PF CC45SL2H100D CERAMIC 10PF CC73FCH1HORSC CHIP C 0 5PF CC73FCH1H020C CHIP C 2 0PF Cox 742 P 2 E2 942 K P New Parts PARTS LIST Parts without Parts No are not supplied Les articles mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Address SMES t E c77 c78 C81 C82 C86 c87 88 89 92 93 C94 C96 C97 C98 C99 C100 C100 C100 C102 103 104 C105 110 C111 C112 C113 C114 C118 C118 C21 22 TCI 2 TC3 Pa
128. ULE 430 450MHZ 1 400 2 PRE AMPLIFIER IC 800MHZ FRGNT END A TM 742 K P M M2 E E2 E3 B TM 942 K P M 91 42 742 942 x Now Parts PARTS LIST Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No sont pas fournis 430 440 TX RX UNIT 57 3590 Telle ohne Parts No werden nicht gellefert 1200M TX RX UNIT X57 3600 11 92 35 184 5 2SK582 3SK184 S DTC114EK 25 2714 FMAS 2SA1362 Y DTC144WK 28C2712 Y 2SB1119 S DTC144EK 2501757 28c2712 Y 25 3123 FMG1 2501760 0 2517106 10 1316 01 B42 2437 04 CC73FCH1H220J 1 471 CC73FCH1H100D CC73FSL1H101J CC73FCH1H1R5B CC 73FCH1H470J 7 1 103 5 CC 3FSL1H101J CK73FB1H471K CC73FSL1H101J3 CC73FCHIHIRSB CEO4NW1C470M CK73FB1H471K 1 030 CC73FCH1H1RSC CK73FB1H102K CK73FB1H471K CK73FB1E223K CC73FCH1HO80D CK73FB1E103K CC73FCH1HO30C CC73FSL1H101J CC73FCH1HO30C CK73FB1H471K CK73FB1H472K CK73FB1H102K 7 1 150 CC73FCH1H220J CK73FB1E103K CEQ4NW1C470M CK73EF1C105Z Description IC 430MHZ VCO PLL FET FET FET DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR DIGITAL TRANSISTOR TRANSTSTOR TRANSISTOR DIGITAL TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET 1200M TX RX UNIT X57 3600 11 CHASSIS LABEL S NQ 22PF
129. W1C470M ELECTRS 47 0 16WV c105 CK73FB1H102K CHIP C 1000PF K C106 CEO4EW1A470M ELECTRO 47UF 1 C107 108 CK73FB1E123K CHIP C 0 012UF K C109 C92 0507 05 CHIP TAN 4 70 6 3WV c110 CK73FB1H682K CHIP C 6800PF K C111 7 1 1052 1 0UF Z C112 CK73FB1H102K CHIP 1000 K C113 CK73FB1E103K CHIP C 0 01UF K C114 CK73FB1H102K CHIP C 1000PF K 115 117 CK73FB1E104K CHIP C 0 10UF K C118 7 1 1052 CHIP 1 09 2 C119 CK73FB1H102K CHIP C 1000PF K C120 CC73FSL1H101J CHIP C 100PF J C121 CK73FB1H102K CHIP C 1000PF K C122 CK73FB1E123K CHIP C 0 012UF C123 CK73FB1E104K CHIP C 0 100 K C124 125 CEQ4EW1A470M ELECTRO 47UF C126 CE04EW1A471M ELECTRS 4700 C127 128 CEO4EW1A470M ELECTRO 47UF 10WV C129 CEO4EW1C101M ELECTRO 100UF 16WV C130 133 CE04EW1A470M ELECTRO 470 C134 CEO4EW1C101M ELECTRO 100UF C135 137 CEQ4EW1A471M ELECTRO 470UF C138 CEO4EW1C470M ELECTRO 470 16WV 6139 CK73FF1C105Z CHIP C 1 0UF 140 141 CK73FB1H102K CHIP C 1000PF C142 CK73FB1E223K 2 K CHIP C 0 022UF K K 2 C143 145 CK73FB1E104K CHIP C 0 10UF C146 147 CK73FF1C105Z CHIP C 1 0UF C148 C90 2167 05 ELECTROLYTIC CAPACITGR LEAD C149 CEO4EW1A101M ELECTRO 100UF 10WV J 1OWV 100PF 470UF CC73FSL1H101J CEO4EW1A471M CXD10959 CHIP C ELECTRO C151 153 C154 IC101 CN1 E40 5425 05 PIN CONNECTOR FOR INSIDE CN2 E40 5224 08 PIN CONNECTOR FOR INSIDE CN3 E40 3246 05 PIN CONNECTOR FOR INSIDE CN4 40 3248 05 PIN
130. Younger final stage url e Power amplifier circuit pu The drive signal is amplified to the specified level by z s a discrete transistor O201 performs class B amplifica A ii tion and the collector output voltage is controlled by an APC circuit 0202 amplifies the power by class C operation improving the efficiency of the final stage Fig 6 Power amplifier circuit 742 742 E 942 CIRGUIT DESCRIPTION APC circuit The automatic transmission output control circuit APC detects and partially amplifies the power amplifier output with a diode and controls the output control voltage The control voltage is output inverse proportion to the output so the control voltage output is always constant To protect the radio against excessive temperature rise the high power unit has a thermal switch The high power unit is automatically set to alow power by the thermal switch if it exceeds the specified temperature e LPF circuit The low pass filter sets the pole to the second and third harmonics and cuts the frequency by having the polar Chebyshev characteristics To cut high frequen cies a filter with Chebyshev characteristics is used before the antenna Fig 7 e 8T 8 V during transmission and unlock signal The signal output from pin 4 of IC1 is high during reception 013 is turned on and Q14 and 011 are turned off No voltage appears at the collector 8T of Q11 Serial data is output from the control
131. amp ZR CUSHIQN CNI CN2 CUSHIQN DC CORD BUSH ING FILTER 455KHZ CERAMIC FILTER CFWM455F SMALL FIXED SMALL FIXED HERICAL BLOC INDUCTSR C18NH INDUCTSR C1SNH K 440MHZ HERICAK BLOCK 435MHZ HERICAK BLOCK 435MHZ HERICAL BLOCK 445MHZ SMALL FIXED SMALL FIXED SMALL FIXED SMALL FIXED COIL SMALL FIXED COIL 9 5T gt COIL 2 5T COIL 3 5T COIL 1 5T COIL 9 5T C8IL 1 5T SMALL FIXED SMALL FIXED INDUCTGR 27NH INDUCTGR 33NH TNOUCTOR 33NH INDUCTOR 22NH INDUCTOR 22NH INDUCTOR 18NH INDUCTOR 10UH CRYSTAL RESONATOR 21 145MHZ CRYSTAL RESONATOR 12 MHZ MCF 21 6MHZ SCREW MODULE BRAZIER HEAD TAPTITE SCREW FLAT HEAD TAPTITE SCREW CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP gt gt x 230 20 20 20 70 20 20 20 2020 22 1 10W 1 10W 1 10W 1 1089 1 1098 100K 33K 100 1 10W 1 10W 1 10W 1 10W 1 10W 1 10W 17109 1 1009 17108 1 10W 1 10W 1 10W 1 1089 1 10W 1 10W 1 10W Cy Cy Oe C4 C C4 CA C4 A TM 742 K P M M2 E E2 E3 B TM 942 K P M 742 A 742 942 x Now Ports PARTS LIST Parts without Parts No are not supplled Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Address Parts No Bh 9
132. amplified again by drive circuit HIC IC8 KCB10 then input to power module IC10 and amplified to the specified level APC circuit The automatic transmission output control circuit APC detects and partially amplifies the power module output with a diode and controls the output control voltage The controlvoltage is outputininverse proportion to the output so the control voltage output is always constant e Antenna selection circuit Figure 19 shows the antenna selection circuit The receiver circuit obtains a low insertion loss and isolation with a two stage breaker circuit consisting of a strip circuit The pin diode used as a switching device has a low junction capacitance The high frequency capacitance of the diode does not depend on the reverse bias voltage Figure 20 shows the equivalent circuit during transmission A current flows through each diode using 8T The impedance becomes very low At that time the receiver side uses a 2 4 strip circuit Therefore the impedance becomes very high when the receiver side is viewed from point The voltage from a power module is transferred to the antenna Figure 21 shows the equivalent circuit during reception The bias is switched off so each diode is high resistance state The antenna and receiving circuit are connected by a strip line 19 TM 742 A 742 942 CIRCUIT DESCRIPTION Power module To receiving front stage 8T Fig 19 Antenna S
133. appears at the collector 8T of 011 Serial data is output from the control unit during trans mission and input to shift register Pin 4 of IC1 is then made low Therefore O13 is turned off and O14 and O11 are turned on An 8 V voltage is applied to the collector 8T of O11 The unlock circuit is activated only during transmis sion The LD pin signal output from the PLL circuit is ORed with the signalat pin 4 of IC1 using D11 asshown in the figure so the LD signalis made high during unlock Therefore no voltage appears at the collector 8T of Q11 and no transmission signal is output during re ception IC2 KCH09 0 V during locking Modulation input 12 8 MHz Data input Lock voltage HET output 5C 5V MO Modulation signal input Lock signal 0 V LD during locking 9C ov Unused 8CL 8 V ripple filter 12 8 MHz crystal oscillation Lock voltage output HET output Data input Clock input Table 16 PLL circuit pin functions 15 742 942 CIRCUIT DESCRIPTION 16 430 TX RX Unit Frequency Configuration The 430 MHz unit incorporates a digital variable frequency oscillator VFO that can freely select a channel step of 5 10 12 5 15 20 or 25 kHz with a PLL synthesizer system The frequency in the receive signal channel is mixed with a first local oscillation frequency of 451 6 461 595 MHz 459 6 471 595 MHz for K models to produce a first intermediate frequency 430 439 995 MHz
134. chniques can easiy damage the circuit boards and void your warranty Seek qualified assistance from your closest Kenwood Service Center Long Beach CA or Virginia Beach VA Time required for this modification is 90 minutes or less Service code A 98 B X53 346 B 2 C IC1 0 91 1 12993 by CLM for Kenwood Service Corporation E51 93 054 Page 1 of 1 KENWOOD 5 B u leti n Amateur Radio Division Subject TM 742 942 28 MHz 50 MHz RC TX Failure Date June 29 1993 Symptom During RC operation Remote Control the 28 MHz and 50 MHz modules do not transmit after a frequency within the affected band is entered from the microphone keypad Pressing the PTT key will cause a beep to be sounded but the radio will not transmit This error is a result of a programming error in two of the microprocessors Corrective Action Replace IC1 on the Control Unit X53 3460 B 2 and IC1 on the Display Unit X54 3130 A 3 to correct this symptom Parts Required Description Kenwood Part No Circuit Description 1 Control Unit microprocessor HD6433388A07F IC1 1 Display Unit microprocessor HD404719A32H IC1 Note To activate the RC function after changing these two parts you need only press the RC key on the front panel of the radio This method differs from the original method which required use of the key and the key Caution This modification requires soldering equipment rated for CMOS type circuits It also requ
135. cles non mentionnes dans le Parts No ne sont pas fournis Telte ohne Parts No werden nicht gellefert Ref No Address Parts No M OR X 9 R73 RK73FB2A220J R74 RK73FB2A221J R75 RK73FB2A470J R77 R92 1213 05 R78 79 RK73FB2A223J R80 R92 0699 05 R81 RK73FB2A103J R82 RK73GB1J222J R83 RK73FB2A471J R84 R92 1215 05 R85 RK73FB2A123J R88 RK73FB2A102J R89 92 R92 1252 05 R93 94 R92 0670 05 R95 R92 0679 05 R96 98 R92 0670 05 R99 R92 1217 05 R100 103 R92 0670 05 R104 RK 3FB2A472J R105 106 R92 0670 05 R108 RK73FB2A681J R111 R92 0670 05 R115 116 R92 0670 05 VR1 R12 6429 05 VR2 R12 6427 05 VR3 R12 6421 05 VR4 R12 6423 05 TS1 579 0401 05 D1 MA77 D3 1SV228 D7 DAN235CK 08 155184 09 DAN23S K 1SS181 UM9401 MI308 155226 05 1 155184 BU4094BF XRU4094BF KCHO9 KCA04 KCB16 KCC04 KCDO4 LASOO9M KCB17 KCDOS 3SK179 L 3SK131 V12 28C2714 CY DTC144EU 28M TX RX UNIT X57 3790 01 Description HZR f CHIP R CHIP R CHIP R CARBON CHIP R SOLID CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP TRIMMING POT TRIM POT gt gt 20 2000 TRIM POT TRIM POT THERMAL SWITCH 95 C DIODE DIGDE DIGDE DIGDE DIGDE DIGDE DIODE DIODE DIODE DIODE DIODE IC SHIFT STORE REGISTER IC IC 28MHZ PLL PLL IC MIC AMPLIFIER AMP 28 30MHZ ICCAPC
136. crocomputer On the other hand the input from the DTMF micro phone is read and controlled by switching the input of IC11 by means Q7 and the microprocessor The ports of IC11 are shown in the following table PLL data output The PLL data is passed through O expander IC101 CXD 1095Q from the microcomputer and output to each band unit with EP CK and DT signals and three serial data items A PLL IC M56760FP is used in common with the 144 and 430 TX RX units Figure 45 shows the data con figuration Figure 46 and 47 shows the PLL data trans fer format To CTCSS unit input Non inverted input of the input amplifier Inverted input of the input amplifier Output o the output amplifier Reference voltage output 2 Abit 21bit Selects the output format of 01 to 04 Binary 2 of B code when stuck at H Hexadecimal code when stuck at L Wm Operation switched to pweor down mode when stuck at these terminals An osciallator circuit is composed by connecting a 3 569545 2 quartz oscillator between MSB LSB MSB LSB Power supply terminal normally OV Controls the 3 state output of Q1 to 04 Enabled when stuck al H High impedance when stuck at L 3 state received data output cim AME L ssp Fig 45 PLL Data Configuration preset by the add on CR Stuck at when the effective tone pari is detected Stuck at when the connection time
137. d local oscillator frequen Cy The control voltage for the vari cap diode is subject to one additional voltage divider stage During receive this DC signal is applied from the RM line to the microproces sor terminal PTHO2 which turns on the tuning indicator light Switching is performed by the 8R line The relationship between the input voltage on the PTHO2 terminal and the tuning indicator and the rela tionship between the RM voltage and the deviation during receive is shown in Table 20and Fig 25 21 742 742 942 CIRCUIT DESCRIPTION I 18 166 15 166 NJM4558M 01 MN4066BS 2 RS IOK 220P UJ D E E SP Fig 24 Block diagram of the ALT unit PTHO2 input voltage ALT indicator 0 1 48 V Only lt turns 1 48 2 79 V Both lt and gt turn OFF 2 79 5 0 V Only gt turns ON Table 20 Relationship between PTH02 input voltage and the T indicator Fig DIGITAL CONTROL UNIT OUTLINE The digital control unit consists of the panel unit which comprises the keys rotary encoder circuit and display circuit as well as the control unit which comprises the reset backup circuit the DTMF circuit the microphone key input circuit the dimmer circuit etc e DATA COMMUNICATION CIRCUIT OF THE PANEL CONTROL UNIT Figure 26 shows the data communication circuit of the panel control unit So is the serial data output SI is the serial data input and an inverter is located between them to protect the p
138. dB 40 kHz or less at 60 dB Attenuation bandwidth 70 dB or more within Fo 1 MHz Spurious 40 dB or more Guaranteed attenuation 1 dB less Insertion loss 2 dB or less Terminating z 4 7 impedance Rp Table 1 MCF L71 0422 05 28TX RX unit XF1 stage MCF The first IF signal is amplified and input to FM IF HIC IC6 KCD04 This signal is then mixed with the second local oscillation frequency of 9 285 MHz to produce the second IF signal of 455 kHz The unwanted near by signalcomponents are then eliminated by an FM ceramic filter The resulting signal is input to IC6 again amplified to the second IF signal and detected to produce an audio signal e Signal strength meter The signal strength meter output voltage of FM IF HIC IC6 KCD04 is supplied to the control unit Nominal center 455KHz frequency 6 dB bandwidth 6 kHz or more from 455 kHz 50 dB bandwidth 12 5 kHz or less from 455 kHz Ripple within 3 dB less 5 kHz of 455 kHz Insertion loss at 6 dB or less maximum output point E Guaranteed attenuation within 100 kHz of 455 kHz 35 dB or more matcing impedance 2 0kQ Table 2 Ceramic filter CFWM455F L72 0372 05 28TX RX unit CF1 TM 42 742 E 942 CIRCUIT DESCRIPTION Shift register circuit The ES CK and DT serial data from the control unit Pin Name IEEE Low when off band are sent to C
139. dBu Set the SQL contro to the closing position Control position 8 00 11 00 BUSY should go out Squelch check Squelch shouid open and BUSY should light up Noise should disappear open SQL control fully clockwise A 125 TM 42 742 E 942 A ADJUSTMENT Measurement point Adjustment point Test Specification KI Adjust 37N 31 to 42 W 10 A or less Transmitter Section Adjustment Powermeter Maximum power check Ammeter 1 Power Frequency 445 000 MHz adjustment check High power adjustment Frequency 445 000 MHz K and P 435 000 MHz E M Transmit Medium power adjustment Frequency 445 000 MHz K and P 435 000 MHz E MI Transmit Low power check Frequency 445 000 MHz K and P 435 000 MHz Transmit Frequency Adjust in the higher DC detector br direction 4 2 K Oscilloscope 445 000 MHz K and P 435 000 MHz AG 1 kHz 2 Deviation adjustment check Fitter Transmit Frequency AG 1 KHz 2 2 to 3 6 kHz 500 Hz Transmit Frequency 3 Tone check Tone On Transmit Frequency 449 980 MHz K and P 439 980 MHz E M Antenna Open Transmit 4 Protection check 5 Frequency Frequency D MHz Frequency 445200 Mhz En counter 435 000 z M adjustment Powermeter 435 000 MHz E M Transmit 1 The adjustment of the 430M BAND can be carried out by t king t
140. e Less than 10 Less than Transmit mode Less than 11 5 Less than 7 0A Less than 6 5 Current drain Receiver mode CET 25W Output Power MD iW Resctance modulation Less than 25098 S 8 83MH _ 10595MHz 30 825 2 455 59 7MH Intermediate frequency 1st 2nd ee 2 2 455 2 7 More than Less than Sei S GREEN Notes 1 Circuitand ratings are subject to change without notice due to advancements in technology 2 Recommended duty cycle 1 minute Transmit 3 minutes Reception Hi Power position Less than 70dB 181 TM 42 A 742 942 SPECIFICATIONS Band 430 440 MHz Band 1200 MHz Band 1240 1300 Mode UaO _ Antenna impedanse Css ai n 20 C 60 C 4 F 140 P 13 8 VDC 15 11 7 15 8 V Negative Less than 11 5 A Less than 10 0 A Less than 1 2 Less than 1 2 A 7424 742 1 5 kg 942 1 8 kg EU 50W 35 W power MID 10 W 10 W Approx 5 W Approx S W Reactance modulation Less 60 dB Less than 3 Double conversion superheterodyne 10 7 MHz 21 6 MHz 59 7 MHz Intermediate frequency n Less than 016 gv 10 dbi More than 12 kHz Less than 24 ki Less than O T zV 14 dB More than 2 W 8 Q load 1240 MHz to 1260 MHz Less than 0 22 zV 7 dByl GENERAL Less than 50 dB TRANSM
141. e and check that the frequency is set to 118 040 with an encoder AM sensitivity K and P models only Frequency 118 040 MHz SSG output 25 Modulation 1 KHz Deviation 30 Press the MR key Minimize the 596 or less Distortion distortion factor factor Oscilloscope SSG 1 Frequency 145 040 MHz SSG output 40 dBu Modulation 1 KHz Deviation 3 KHz AF output 4V 8 ohms 3 Distortion factor adjustment Adjust so that all LEDs go on then one LED goes off Signal strength meter adjustment Frequency 145 040 MHz SSG output 224 Modulation 1 KHz Deviation 3 KHz Adjust the SSG output so that all signal strength meter LEDs go on The SSG output is 20 6 dBu SSG output 23 dB MOD 1 kHz DEV 3 kHz Control position 8 00 11 00 BUSY should go out Frequency 146 040 MHz SSG output Off Modulation 1 KHz Deviation 3 KHz Set the SQL control to the closing position Squelch should open and BUSY should light up SQL control fully Noise should clockwise disappear Squelch should open Squelch check SSG output MOD 1 kHz DEV 3 kHz 3 SSG output 3 14dBu 123 742 742 E 942 ADJUSTMENT Transmitter Section Adjustment Measurement point Adjustment point Specification equipment Powermeter Rear ANT TX RX VR3 Check 57 W or more Ammeter Panel TX RX VR3 Adjust 54W 46to 59 W 11 5 A or less TX RX VR4 Adjust 12W
142. e control of the RD line Figure 54 The setting of the squelch level turns the analog switch ON OFF by means of the 5 bit data of the various bands Refer to the LIST OF PORTS of the shift registers A and B Since a resistance is connected between the two ter minals of the analog switch the resistance value is changed by the combination of the ON OFF states of the switches The voltage level of the SQ output can be con trolled as a result Figure 55 ac There is in each parts To speaker jack of control unit internal Speaker r Power Amy RDSQ 0 2 Fig 54 Shift register ES DATA Analog switch Fig 55 49 TM 742 AJ742 E 942 CIRCUIT DESCRIPTION Connector Connecting the Band Unit and Control Unit Outline The pin assignments of the connector that connects bands The band unit is also used to check which band the control unit and band unit are common in three unit is connected 1 12 1 12 8 8 5 5 ES SSRR TK w 2 mo Audio signal from microphone including DTMF 13 8 V input Microphone ground 4 Es AF signal is output when speaker jack is connected SPSW Speaker jack connection and detection H during connection Pin No Name aje RECEN 8 V is output during the power on sequence eave ana sre ponerse 5 V is output during the power on sequence AL
143. e low POWER switch Middle and low POWER switches are ON when high 20 Q APC control Operation during transmission Squelch hysteresis switch OFF when busy PLL output switch Antireverse current D8 09 Antenna transmission reception selection ON during transmission D10 011 Power detection APC Power reverse connection protection Antireverse current 8T pulse rise is faster during transmission and reception IF level limiter 65 TM 42A 742 E 042 66 DESCRIPTION OF COMPONENTS 1200TX RX Unit X57 3600 11 TM 942A UT 1200 M No 1 Second local oscillation mixer IF amplification detection low frequency amplification noise amplification noise detection 1 59 7 MHz first IF input 3 59 245 MHz second local oscillation 9 OV when scan control and busy signals are busy 0 Noise detection voltage output DC and squelch switching i Signal strength meter output Detection output RD output AF output 4 Low frequency amplification and limiter Microphone amplifier 5 Shift register See the circuit description 6 7 8 9 C2 O voa IC11 VCO PLL Enable input 138v gt __ gt 5v IC12 5V AVR Three terminal regulator UN OUT Operation during reception rma IC IC IC a u i Modulation input LD 12 8 MHz Data input Clock input during reception Lock voltage PLL output TM 742 A 742 El942
144. e not supplied Teile ohne Parts No werden nicht gellefert Ref No N35 2605 45 N46 3010 46 N80 2006 45 N80 2008 45 N80 2605 45 N86 2606 45 N87 2606 46 N87 2608 46 N89 2005 46 N99 0331 08 CANT T07 0268 05 T42 0310 25 T91 0396 05 91 0397 05 WO1 0414 04 53 3460 11 53 3460 21 54 3130 11 Addrass Parts No SMES E 59 1E PARTS LIST Les articles non mentionnes dans le Parts No ne sont pas fournis TM 942 CONTROL UNIT 53 3460 Description HZR BINDING HEAD MACHINE SCREW PAN HEAD TAPPING SCREW PAN HEAD SCREWCPANEL PAN HEAD TAPTITE SCREW PANEL PAN HEAD TAPTITE SCREW PANEL SCREW CASE BRAZIER HEAD TAPTITE SCREW BRAZIER HEAD TAPTITE SCREW PAN HEAD TAPTITE SCREW RELEASE SCREW SET CACSY LGUDSPEAKER FULLRANGE FAN MOTOR MICROPHONE MICROPHONE SPANNER CACSY CONTROL CIRCUIT UNIT CONTROL CIRCUIT UNIT DISPLAY UNIT 57 3580 11 57 3590 13 57 3590 23 57 3600 11 TX RX UNIT TX RX UNIT TX RX UNIT TX RX UNIT 144MHZ 50W 440MHZ 35W 430MHZ 35W 1200MHZ 10W CONTROL UNIT X53 3460 XX CK73FB1H102K CK73FB1E104K CK73FF1C105Z CK73FB1E223K CK73FB1H102K CK73FB1E104K CK73FB1H102K CK73FB1E104K CK73FB1H102K CK 73FF1C105Z CK73FB1E104K C92 0507 05 CC73FSL1H101J CK73FB1H472K CC73FCH1H1 207 CK73FB1H123K CC 73FCH1H220J CK73FB1H182K CC73FCH1H151J CC73FSL1H101J CK73FB1H102K CK73FF1C105Z CK73FB1E223K
145. eans of a varicap diode e Modulator circuit The audio signal from the control unit is input to microphone amplifier HIC IC7 KCA04 IC4 consists of a preemphasis circuit amplifier limiter and splatter circuit that eliminate unwanted high frequency components The voltage controlled oscillator VCO signal is directly frequency modulated by means of a varicap diode in the frequency modulator circuit Younger stage circuit The signal output from the VCO is input to drive circuit HIC IC8 KCB11 The amplifier can obtain a stable drive output without adjustment because it has a wide band An APC circuit controls the collector voltage in the younger final stage 144 TX RX Unit PLL Synthesizer The VCO and PLL circuit are housed in a solid shielding case as a hybrid integrated circuit Com parison frequencies of 6 25 kHz and 5 kHz are produced by dividing a 12 8 MHz reference oscillation frequency by 2048 and 2560 to correspond to 5 10 12 5 15 20 and 25 kHz channel steps For 144 MHz the relationship between fyeg and each frequency division ratio is given by fico 0144 10 7 x 128 A x fosc R Where fyco VCO output frequency n Binary 10 bit programmable counter setting value A Binary 7 bit programmable counter setting value fosc Reference oscillation frequency of 12 8 MHz Modulation 0 V during lock input 12 8 MHz 25 Data input Lock voltage Clock input Enable input HET output Fig 1
146. ection Adjustment Measurement s Adjustment point Test Unie para Digital TX RX voltmeter Distortion Rear EXT SP panel Distorition Rear EXT SP TX RX L7 meter panel Oscilloscope SSG aii SSG output 24 dBu Frequency 445 050 MHz 556 Rear EXT SP K and P panel 435 050 MHz E M SSG output Off Modulation 1 KHz Deviation 3 KHz 2 SSG output 14 dBu 3 SGG output 3 3 500 3 Specification i 1 Frequency 445 050 MHz i Bm en K and P 438 445 450 MHz K P adjustment 435 050 MHz 440 MHz E M2 E M Spectrum analyzer Center of above frequency Tracking generator Output 30 dBm Adjust each frequency as shown in the figure 12 dB SINAD or more Receive Frequency 445 050 MHz sensitivity K and P meter check 435 050 MHz Millivoltmeter E MI Oscilloscope SSG output 9 dBu SSG Modulation 1 KHz Deviation 3 KHz Minimize the 596 or less Distortion Frequency 445 050 MHz factor K and P distortion factor adjustment 435 050 MHz E M SSG output 40 dBu Modulation 1 KHz Deviation 3 KHz AF output 4 V 8 ohms Adjust so that all LEDs Signal Frequency 445 050 MHz strength K and P go on then one LED meter 435 050 MHz goes off adjustment E M check SSG output 23 dBu Modulation 1 KHz Deviation 3 KHz Adjust the SSG output so that all signal strength meter LEDs go on The SSG output is 20 6
147. el side The LCD features dynamic lighting up with 1 2 duty and the lighting up contents are sent from the CPU HD404719A26H to the LCD by serial data transfer The LCD display consists of 158 segments e DESCRIPTION OF THE OPERATION Normally the CLOCK line is stuck at L and the DATA line is stuck at Since the shift register consists of 160 160 bits 320 bits in series it must be given 320 bit data every time For the ENABLE signal to be outputted the DATA line is switched H L 4 times at the point A B with the CLOCK line stuck at after transmitting 320 bits for MSM5265 160bit Fig 34 Display Circuit DIMMER CIRCUIT The dimmer circuit changes the brightness of the lamps in 6 steps Figure 35 shows the dimmer circuit which is built into the IC114 HIC A voltage changeable in 6 steps is outputted from the LB port through the combination of the various LB ports Q1 to 03 of the shift register Refer to the Shift Register Port Table for the logic The display does not light up when the power is turned OFF because the LB line is switched by means of the LB switch 02 Control band LED lighting circuit The LED brightness is changed by switching the current to one of two ports for each LED It is changed in two steps corresponding to lamp dimmers d1 d2 and 4 Q6 2504116 2 5 a 5 18 oTe1448U DTci446U DTCi44RU Fig 35 Dimmer Circuit
148. election Circuit Receiving signal High impedance Module during non operation Transmit 5 Pout ignal ud N Impedance _ gt Short circuit Impedance 0 8T Fig 20 Equivalent Circuit during Transmission qe High resistance Fig 21 Equivalent Circuit during Reception 1200 TX RX Unit PLL Synthesizer The VCO and PLL circuit are housed in 2 solid shielding case as a hybrid integrated circuit This reduces the electrical and mechanical influence and ensures frequency stability The VCO and PLL circuit double the higher harmonics by oscillating and locking 600 MHz frequency to produce a 1200 MHz band frequency Comparison frequencies of 5 kHz and 6 25 kHz are produced by dividing a 12 8 MHz frequency of the TCXD by 2560 and 2048 to correspond to 10 12 5 20 and 25 kHz channel steps The relationship between fo RX and each frequency division is given by RX fx 59 7 2 n x 128 A x fose R vco LD Modulation input 0 V during transmission Lock voltage 12 8MHz Data input Clock input HET output Enable input utp The same as for the 144 MHz unit except 8 V shown in the figure above Fig 22 PLL pin description 20 Where fco RX Previous output frequency that is multiplied by 2 during VCO reception fax Reception frequency n Binary 10 bit programmable counter setting value Binary 7 bit programmable counter setting value f Reference o
149. erial data from the control unit HIC IC6 KCD04 is supplied to the control unit are sent to IC1 BU4094BF to perform the control op eration outlined in the following table TX RX selection Low when TXis set TX power selection Low when high and low H when middie Low when off band Table 7 e ATT circuit to attenuate the received signal before it enters Q2 FET IF there is cross modulation the ATT circuit operates for high frequency amplification 50 TX RX Unit Transmit Signal Channel e Outline In the transmission channel the desired frequency is produced by direct oscillation and is directly frequency 21 58 3840 0 modulated by means of a varicap diode Q202 e Modulator circuit 5204 7 The audio signal from the control unit is input to oa CX microphone amplifier HIC IC3 4 IC4 consists of 8 a preemphasis circuit amplifier limiter and splatter circuit that eliminates unwanted high frequency aT components The voltage controlled oscillator VFO signal is directly frequency modulated by means of a varicap diode in the frequency modulator circuit c202 2 0 e Younger stage circuit The signal output from the VCO is input to drive T circuit HIC IC4 KCB 18 The amplifier can obtain a stable ica drive output without adjustment because it has a large bandwidth An APC circuit controls the collector voltage EX pil 4 pues ces 3 4 in the
150. g reception 0V during transmission 2V while locked 0 7V while unlocked 010 014 024 010 012 Q13 OFF 011 014 024 During transmission 010 012 013 024 011 014 OFF During reception Ce TST HET output amplifier 50 53 995 MHz During transmission 60 595 64 590 MHz During reception S 222 Middle not for 10 W LOW Power switch Operation during transmission Q25 and Q26 OFF During FM reception Q25 and Q26 ON During AM reception 025 026 selection switch 021 022 023 TM 742 A 742 E 942 DESCRIPTION OF COMPONENTS No 3 Operation Condition Compatibiity D7 HET selection switch 59 TM 42A 742 E 942 60 DESCRIPTION OF COMPONENTS 144TX RX Unit X57 3580 XX 1 Reference Description IC1 Shift register IC2 10V AVR Second local oscillation mixer IF amplification detection 5 low frequency amplification noise amplification noise detection and squelch switching IC7 Low frequency amplification and limiter APC See the circuit description 9 10 7 MHz first IF input 10 245 MHz second local oscillation 0 V when scan control and busy signals are busy Noise detection voltage output DC i Signal strength meter output Detection output RD output 9 AF output Microphone amplifier Power module Modulation input 0 V during lock VCO PLL
151. g signal goes to the first mixer is mixed with the first local signal from the PLL circuit then converted to the first IF of 10 595 MHz Center frequency 10 595 MHz Pass bandwidth 6 5 kHz or more at dB 3 23 kHz less at 40 dB Attenuation bandwidth 40 kHz or less at 60 d8 70 dB or more within Fo 1 MHz uaranteed attenuation Spurious 40 dB or more Ripple 1 dB or less Terminating impedance 2 9 Table 5 MCF L71 0421 05 50 unit XF1 The unwanted near by signal components are then eliminated by a two stage MCF The first IF signal is amplified and input to FM IF HIC IC6 4 This signal is then mixed with the second local oscillation frequency of 11 05 MHz to produce the second IF signal of 455 kHz The unwanted near by signal components are then eliminated by an FM ceramic filter The resulting signal is input to IC6 again amplified to the second IF signal and detected to produce an audio signal em Ripple within 5 kHz 3 dB or less of 3455 kHz Insertion loss at maximum 6 dB output point 96 858 Guaranteed attenuation within 100 kHZ of 455 kHz Terminating impedance 35 dB or more 2 0 kQ Table 6 Ceramic filter CFWM455F L72 0372 05 5 unit CF1 742 742 El942A CIRCUIT DESCRIPTION Signal strength meter Shift register circuit The signal strength meter output voltage of FM IF The ES CK and DT s
152. gister B Shift register A after dimmer data ES Fetched in latch with H th More than 40 ns tsu More than 125 ns Fig 40 SHIFT REGISTER PORT SPECIFICATION LIST VOL SQ CONTROL UNIT 53 346 SHIFT REGISTER 4094 BUILT INTO 113 Circuit Terminal name RD mute 0 ON 1 OFF RD MUTE BAND A squelch level adjustment bit 0 0 There is resistance 1 No resistance BAND A squelch level adjustment bit 1 NEM Q There is resistance 1 No resistance BAND squelch level adjustment bit 2 PD_SOA1 5 2 0 There is resistance 1 resistance BAND A squelch level adjustment bit 3 0 There is resistance 1 No resistance BAND A squelch level adjustment bit 4 0 There is resistance 1 No resistance BAND B squelch level adjustment bit 0 0 There is resistance 1 resistance BAND B squelch level adjustment bit 1 0 There is resistance 1 No resistance 26 TM 742 742 El942 CIRCUIT DESCRIPTION S Re a Port Data Name SA Bac Port VE kup Band B squelch level adjustment bit 2 0 There is resistance 1 No resistance BAND B squelch level adjustment bit 3 __5083 ss 0 There is resistance 1 No resistance BAND B squeich level adjustment bit 4 0 There is resistance 1 No resistance BAND squelch level adjustment bit MEN Q There is resistance 1 No resistance BAND squelch level adjustment
153. h switch 8 Second local oscillator 30 37 MHz Low frequency amplifier limiter IC7 IC8 220 MHz band transmission IC9 Q1 Q2 Q3 No 1 Squeich output busy signal 0 V while busy Noise detection voltage output DC Signal strength meter output RD output AF OUT Microphone amplifier Operation during transmission 220 224 995 MHz Input Output Drive u High frequency amplifier Operation during reception 220 MHz band o2 Fustmixer_ Operation during reception o First IF amplifier Operation during reception 30 825 MHz Modulation input 2 V during locking 8 V during transmission 0 V during reception Lock voltage Data input _____4 pp Clock input Enable input _____ HET output TM 742 742 E 942 DESCRIPTION OF COMPONENTS 010 014 Transmit receive power switch 010 012 013 011 014 OFF During reception Modulation system mute ON during reception HET output amplilier 220 224 995 MHz During transmission VCO 8V ripple filter 189 175 194 17 MHz During reception Middle low power switch ICI control Operation during transmission No 2 Operation Condition Compatibility 8V during reception 0V during transmission as TTT rII Antenna transmit receive switch ON Transmit OFF Receive Ia 63 742 A 742 942 64 DESCRIPTION O
154. he 144M BAND unit out of the control unit Fig 58 430 MHz band adjustment Component layout upper view 126 TM 742 A 742 942 A ADJUSTMENT 1200 MHz Band TM 942A UT 1200 Common Section Adjustment Measurement OU point Test Specification 1 Lock voltage 1 Frequency 1299 975 MHz Digital TX RX TP2 TRIM1 Check the E 6 1 69V Receive voltmeter C11 voltage Receiver Section Adjustment 1 Frequency 1270 100 MHz Digital the voltage voltmeter TX RX VR2 so that the AV 0 1 V voltage is 0 1 V higher than above Specification 1 ALT adjustment 2 The same as the above frequency SSG Off Check that the 0 1 V 0 2 V voltage is 0 2 V higher than above when ALT is on then turn ALT off 3 The same as the above frequency SSG output 0 GBM Modulation 1 KHz Deviation 3 KHz 12 dB SINAD or more Distortion meter Millivoltmeter Oscilloscope 1 Frequency 1270 100 MHz SSG output 9 dBp Modulation 1 KHz Deviation 3 KHz 2 Receive sensitivity check Distortion 1 Frequency 1270 100 MHz Distortion Minimize the 5 or less adjustment SSG output 40 meter distortion factor Modulation 1 KHz Oscilloscope Deviation 3 KHz 550 AF output 4 ohms Adiust so that all LEDs go on then one LED goes off Signal strength meter adjustment check 1 Frequency 1270 100 MHz SSG output 24 dBu Modulation 1
155. i a D mum MATT j MEME SER x E so 581 211 sth 270601159 121 340 Er dv v8S8t tv90H 21 MADRP EEA 220251 5 021 056010 2 1 1 I ro s A 69 fof 2 94 3 94 massa NO 94 fof I s 2 24 4 3 ELL 1 58 1 272755 a amp ST x ux s i x LI 1 M PE REX 2 Tum zm 21 r MEM 922 421 rose 1121 s ei sS ep nla ni i EE L EE ccc LEXLIT te Xx 09y SSX LINN 278 XX 09v 5X LINN i9VIG 9IIVIN3H2S Oq 10499 yeubig 20 NOWWOO2 3NI 1 T1vNOIS INOJ t78 1n03 TEER a MDD 1 9 TH 678 1003 L 6 1803 7048 4592 a n T 2176 1902 EIST 279 1905 3 991 178 1405 4 9 101 4 6 1 0 01 20 274 3 5012178
156. in Sr Fig 47 M56760 PLL DATA OUTPUT 46 TM 42A 742 El942 CIRCUIT DESCRIPTION The PLL and reference frequency division ratio data input to the 1200 TX RX unit are output from P21 CK P22 DT and P23 EP1 of the CPU The reference frequency division ratio data R is output only when the power is switched on and when 10 and 12 5 kHz reference frequencies are changed 19bit 16bit MSB LSB MSB LSB RST Fig 48 PLL Frequency Division Ratio Data Fig 49 Reference Frequency Division Ratio Data Transfer Format Transfer Format LSB Dummy Date CEEBEBISDPIIISD Ts Ps De DEE Control Swallow counter division rste 22 23 2 2 26 Main coun ter division rete N EBDEEBBBEBBE Dummy LSB pate 0 Control AE ontro El Referense 1 wee as elelee eee Fig 50 Data Configuration 47 TM 742 742 E 942 CIRCUIT DESCRIPTION 48 AF SIGNAL SYSTEM OUTLINE Signals coming from the detected signal RA of each band unit pass through the electronic potentiometer are added at the mute circuit and buzzer circuit and after passing through the speaker switching circuit they are outputted to the power amplifier and to the speakers Each band has an independent AF signal and any ar bitrary combination can be outputted through the speak er depending on the position where the speaker jack is plugged
157. inal regulator For internal speaker For level compensation 1 Input IC104 Band 1C105 Common 8 Output IC104 Band B IC105 Common IC104 105 Low frequency amplification 138V 049 GND Output IC104 Band C IC105 Band A 9 Input IC104 Band C IC105 Band A 51 TM 742 A 742 942 DESCRIPTION OF COMPONENTS CONTROL UNIT X53 346X XX No 2 Operation condition interchangeability Band C AF input Band A AF input 9 Band AF input Band B internal SP output Band C external SP output 3 Band A internal SP output D Band B external SP output 3 Band C external SP output 3 Band A external SP output f Band A switching input Band B switching input 8 Band C switching input 8 to Internal SP when stuck at 1 Analog switch for speaker switching Q101 102 are ON when power is ON Q101 102 are OFF when power is OFF Q103 instantaneously ON when POWER ON Q104 instantaneous ly ON when POWER OFF Mute switch Fan operates when switch is ON fan does not operate when Switch is OFF Fan motor switch 52 TM 742 A 742 E 942 DESCRIPTION OF COMPONENTS CONTROL UNIT X53 346X XX No 3 107 108 109 Q107 for band C Q108 for band A Q109 for band B Lithium battery OFF when power supply is connected D1 p s Back flow prevention lithium battery switching 2 DISPLAY UNIT X54 3130 11 No 1
158. io Division Symptom Several TM 742 942 owners have complained of a popping noise when the squelch opens or closes even when the volume is turned down Technician s Notes Suggestions We have found that the following changes will reduce or eliminate this noise Parts Required Qty Description Kenwood Part No Circuit Description 3 470K ohm Chip resistor RK73FB2A474J R152 153 154 3 1 uF Chip capacitor CK73FF1C105Z Procedure 1 Carefully unsolder pins 4 14 and 15 of IC 106 on the foil side of the Control Unit X53 3460 A 2 2 Gently lift up on the unsoldered pins of the IC and place a 1 uF chip capacitor as shown in the accompanying diagrams 3 Solder the capacitors to the foil and to the pins of the IC Note If you do not have enough room to install the capacitors on pins 14 and 15 you will need to cut the circuit foil and install the capacitors in the alternate positions indicated in the diagram 4 Install resistors R154 and R153 as shown 5 Install resistor R152 on the component side of the board as shown in the diagram Caution This modification requires soldering equipment rated for CMOS type circuits It also requires familiarity with surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself Seek qualified assistance Time required for this modification is 1 hour or less Service code A 09 B X53 3460 A 2 C ADD R 0 91 7893 by CLM for
159. ion from Sin Refer to DATA WRITE for the entry of data CONTROL REGISTER 1 Address 1101 and data 1001 reference signal out put waveform 1 Hz 24 hour display system is entered TERN e he address data 15 outputted Setting of th ung of the address to be read at the next clock cycle segs XXIII 2502222 from Sin Fig 28 Read timing Address entered in Sin Data wR lj DATA CONTROL z DATA READ gt The read mode is set by sticking CS at 71 and WR at H The serial address is entered from Sin at the 5 leading edge of the upper 4 bits of the SCK clock The other 4 bits have nothing to do with this operation When XGSress or TO WR is fetched at the 8th leading edge of the SCK clock EET the entered address and data are outputted from Sout synchronized with the leading edge of the SCK clock Address and data Address and data Figures 28 29 Sout of 1 minute of 1 minute digit is ouptutted digit is ouptutted Fig 29 DATA WRITE wa The WRITE mode is set by sticking CS to 1 and WR to 1 When the serial address and the data to be cs written it is not necessary to write it in the counter are entered from Sin they are fetched at the leading edge Fon of the SCK clock When WR is fetched with the 8th lead ing edge fo the CSK clock the following data is written in the entered address Sin pen Cure Don s Care ww lt N Coun
160. ires familiarity with surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself Seek qualified assistance Time required for this modification is 1 5 hours or less Service code A 84 B X53 3460 B 2 C IC1 D 91 lo OQ AAAcnttt CERE 062993 by CLM for Kenwood Service Corporation E51 93 033 Page 1 of 1 KENWOOD sro Tec h n LI leti n Amateur Radio Division Subject TM 742 942 Squelch Popping Noise Date May 24 1993 Unsolder An 4 14 and 15 and gently lift up on the pins the IC Install the 1 uF chip capacitor as shown Caution This modification requires Cut foil and add chip cap here if you do not have enough soldering equipment room at pin 15 of the IC Cut foil and add chip cap here if you do not have rated for CMOS type enough room at pin 14 of the IC circuits It also requires familiarity with surface mount soldering techniques If you do Add R156 Add R153 not have the proper Control Unit X53 3460 A 2 equipment Side View knowledge do not attempt this modification yourself Seek qualified Add R152 assistance Control Unit X53 3460 A 2 Time required for this modification is 1 hour or less Service code 09 53 3460 2 C ADD 0 91 6893 by CLM for Kenwood Service Corporation E51 93 035 Page 2 of 2 KENWOOD h n leti n Amateur Rad
161. jack of the band unit outputs the AF signal of the band in question when the speaker is connected The speaker jack of the control unit outputs the sig nal obtained by mixing the remaining AF signals This sig nal is outputted by the internal speaker when there is no speaker connected to the speaker jack Figure 53 shows the main circuit When there is nothing connected to the speaker jack the signal is entered in the adder of IC103 The level of the adder does not change irrespective of the number of signals 1 to 3 that are added For example when one wants to mix the signals of speakers A and C of band B and to output the obtained result from the remaining speaker it is possible to exe cute this operation by connecting with the jack of band B and the jack of the control unit e SQUELCH CIRCUIT Squelch can be preset at each band by means of the squelch potentiometer located in the panel unit The squelch potentiometer signal is converted to 5 bit data through A D conversion at the microprocessor of the panel unit Data are sent from the panel unit to the microproces sor of the control unit and after data conversion they are sent as serial data from IC101 of the control unit to IC113 HIC Refer to the SHIFT REGISTER section for the logic D A conversion is carried out at IC113 through the combination of the shift register and the analog Switch and the control voltage of IC110 is generated by the RDSO terminal to carry out th
162. limitations of this new microprocessor 21094 by CLM for Kenwood Service Corporation 51 93 062 Page 1 of 1 KENWOOD Se rvi ce B u leti n Amateur Radio Division Subject TM 742 942A Microprocessor Change Date November 29 1993 Symptom Reports of problems with microprocessor lock up when using S meter squelch problems with storage recall of PL tone frequencies of 203 5 Hz and or 114 8 Hz or problems with a lack of transmit on the UHF band modules during Remote operation can be corrected using the changes noted in this bulletin Units that exhibit any of these symptoms with serial numbers between 412XXXX and 507XXXX need only change IC1 on X53 3460 21 B 2 Units that exhibit any of these symptoms with serial numbers of 412XXXX and below must also change IC1 on X54 3130 11 Units with serial numbers of 507XXXX and greater have had these changes incorporated in production Parts Required Qty Description Old Part No New Part No Circuit Description 1 Microprocessor HD6433388A07F or HD6433388A14F HD6433388A22F 1 Microprocessor HD404719A26H HD404719A32H IC1 Caution This modification requires advanced surface mount soldering equipment that is rated for CMOS circuits It also requires familiarity with advanced surface mount soldering techniques If you do not have the proper equipment or knowledge do not attempt this modification yourself Attempting to remove and replace either IC without the proper equipment and te
163. m inv THWOOZI 5 4 100 0623 821 pd Hi ZI ZX 0121 Tu 11 009 2SX LINN 0021 gull OG uotutuoo jeu amp is IND ME IS sss orina MERE ELTE EM 343 90t 1N02 2x2 901 1902 219 901 1002 253 90 1802 3W 901 1 02 901 1 02 01 901 803 34 01 1NO2 501 1403 01 1N02 8 501 1N02 8 lt 01 1 02 ana 44511052 810 00 009 48X XH X1 INOOCL 0 22 742A M BOARD VIEW 2 72 742E E 2 942A M 742 A 742 E 942 A 0 22 742A M M2 2 72 742E E E2 E3 942A K P 0 12 742A K P 942A M 430 440M TX RX UNIT X57 359X XX 0 12 742A K P 942A M 430 440M TX RX UNIT X57 359X XX Foil side view Component side view x x X 5 m Qe 5 5 SP O rr G LO 5 N IN lt N x oor NN OM v 5 x o xoo ooon u lt e e N a AAANNANN S1INGOW IC1 KCD04 IC2 KCAO4 IC3 BU4094BF IC4 LA5010M IC5 KCCO4 IC6 KCB14 7 57788 IC8 KCB12 IC9 KCB13 IC10 KCHO7 01 3 35 184 5 Q2 2SK582 04 0 114 05 25 2714 06 7 F MAS 08 25 1362 Q9 DTC144WK 010 11 17 25 2712 012 25811195 Q13 15 DTC144EK 016 2501757 0
164. mponent side view pens FETA IC2 KCD04 1C3 KCX03 IC4 KCA04 IC5 8U4094BF IC6 LA5009M IC7 KCB09 IC8 KCB10 IC9 KCC04 1 10 67711 IC11 KCH02 1C12 NJM78LOSUA Q1 MGF1502 Q2 2SC4095 R47 6 03 35 184 5 05 5 Q6 2SC3356 Q7 2SC3120 Q8 19 2SA1362 Y Q9 2SB1302S Q10 DTC144WK 011 1 012 13 23 28C2712 Y Q15 17 DTC144EU 018 2501757 Q20 DTC124EK 021 22 2504226 823 24 024 2501760 0 Q25 FMG1 Q26 2SJ106 GR Q27 DTA14EK Q28 DTC114EK 01 862 D3 MA716 04 6 155193 D5 02CZ6 2 X Y 07 155187 D8 02CZ12 X Y D9 HSK151 010 13 MI808 D14 DSA3A1 D15 02C236 Y 2 D17 DAP202U D19 MI808 Component side A patern C panern D patiern LA5009M VREF 3SK184 GND VIN NJM78L05UA MGF1502 69060 9 242 0034 1 243 0034 1C eo DTC124EK 5 FMG1 FMW1 DTC144EU DTC144WK 2SA1362 2SD1757K B DTA114EK 25 2712 25 3120 25 3356 Connect and D fe Connect and 5 Connect and A Connect and B C D Connect A and Connect and C amp Connect B and D 6 Connect A and B C S Connect A and B D Connect A and C D POWER MODULE eer fed p ORONO 5 Foil side IC2 KCD04 4 04 1C5 BU4094BF 1C6 LA5009M IC7 KCBO9 IC8 KCB10 IC9 KCCO4 0 67711 IC11 KCHO2 1C12 NJM78LO5UA Q1 MGF 1502 Q2 25C4095 R47 6 Q3 3SK184 S 05 5 06 25 3356 07 25 3120 08 19 25 1362 Q9 2SB1302S QIO DTC144WK Q1
165. n diode switch to the receiving front end The signal is then passed through an antenna matching coil and amplified to high frequencies by a 10 7MHz 7 5 2 or less at 348 25kHz or less at 40dB 45kHz or less at 60dB 1 0dB or less 1 5dB or less 704 more within 1MHz Spurious 40dB or more at fo fo 500kHz 8048 or more at fo 900 920kHz Table 9 MCF L71 0228 05 144 TX RX unit XF1 Nominal center frequency fo Pass band width Attenuation band width Ripple Insertion loss Guaranteed attenuation Terminating impedance GaAs gallium arsenide field effect transistor The unwanted components of the signal are eliminated by a bandpass filter consisting of a three stage variable capacitor The resultant signal is sent to the first mixer mixed with the first local signal from a PLL circuit then converted to a first intermediate frequency of 10 7 MHz The unwanted near by signal components are then eliminated by a two stage MCF em 1 Rating Ripple 3dB or less within 4kHz of 455kHz Insertion loss 6dB or less Guaranteed attenuation 35dB or more within 100kHz of 455kHz matching impedance 2 0kQ Table 10 Ceramic filter CFWMA55F L72 0372 05 144 TX RX unit CF1 TM 742 A 742 942 CIRCUIT DESCRIPTION 12 144 TX RX Unit Transmit Signal Channel e Outline In the transmission channel the desired frequency is directly oscillated and directly frequency modulated by m
166. nal transmission stage and then through a transmission reception selection diode switch to the receiving front end The signal then passes through an antenna matching coil andis amplified to high frequencies by a GaAs gallium arsenide field effect transistor The unwanted components of the signal are eliminated by a bandpass filter consisting of a three stage variable capacitor The resulting signal goes to the first mixer GaAs field effect transistor is mixed with the first local signal from the PLL circuit then converted to a first If of 30 825 MHz The unwanted near by signal components are then eliminated by a two stage MCF The first IF signal is amplified and input to FM IF HIC 5 KCD04 This signal is then mixed with the second local oscillation frequency of 30 37 MHz to produce the second IF signal of 455 kHz The unwanted near by signal components are then eliminated by an FM ceramic filter The resulting signal is input to IC5 again amplified to the second IF signal and detected to produce an audio signal 60 dB or more within 1 MHz Spurious 40 dB or more Ripple 1 5 dB or less Terminating impedance 4 7 Table 13 MCF L71 0420 05 220 TX RX unit XF1 T MR o Nominal center A55KHz frequency 6 dB bandwidth 6 kHz or more from 455 kHz 50 dB bandwidth 12 5 kHz less from 455 kHz Ripple within 5 kHz of 455 kHz 3 dB or less Insertion loss at Facer ees
167. nes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Address Parts No x B amp amp F A01 2068 03 A01 2069 03 A13 1601 02 A62 0206 02 A62 0219 03 A62 0221 03 482 0012 02 482 0013 02 DISH LIN 803 0577 04 B41 0696 04 B42 2455 04 B42 3343 04 B42 3394 04 42 3484 04 842 3485 04 42 3485 04 42 3554 04 44 2163 04 N O 0 co B44 2165 04 B46 0410 30 B46 0419 00 B46 0422 00 BS9 0466 00 IH DJ ND B62 0287 10 B62 0288 00 B62 0289 00 B62 0345 00 B72 0504 04 24 25 25 30 B72 0505 04 B72 0506 04 D32 0417 04 E23 0676 04 E30 3006 08 E30 3034 05 E30 3135 15 E37 0006 05 E37 0325 05 E37 0326 05 F01 0992 03 F01 0993 04 F07 1203 13 F07 1232 04 F07 1345 04 F15 0679 04 F51 0017 05 F51 0018 05 G01 0833 04 002 0505 05 602 0716 04 G10 0663 04 72 A62 0222 03 Description METALLIC CABINET UPPER METALLIC CABINET BGTTGM FREM PANEL BODY PANEL ASSY PANEL ASSY PANEL ASSY BACK PANEL LOWER 742A 742E UPPER BACK PANEL LOWER DRESSING PLATE CAUTION LABEL LABEL M4x8 MAX LABEL S NQ LABEL FCC LABEL SP ANT ANT LABEL SP ANT LABEL M2 6x5 MAX UPC CODE LABELCITEM CARTON UPC CODE LABELC OUTER CARTON WARRANTY CARD WARRANTY CARD WA
168. nnel step of 5 10 15 20 or 25 kHz to be selected The frequency in the receive signal channel is mixed with afirst local oscillation frequency of 36 83 38 525 MHz to produce a first intermediate frequency IF of 8 83 MHz 28 29 695 MHz This frequency is then mixed with a second local oscillation frequency of 9 285 MHz to produce a second IF of 455 kHz This is called double conversion system The signal in the transmission channel is produced by direct oscillation is frequency divided by a PLL circuit amplified by a linear amplifier then transmitted 455 KHz e 9 285 MHz Fig 1 Frequency configuration 28 TX RX Unit Receive Signal Channel e Outline The received signal from the antenna passes through a low pass filter in the final transmission stage and then through a transmission reception selection diode switch to the receiving front end The signal then passes through an antenna matching coil and is amplified to high frequencies by a MOS field effect transistor The un wanted components of the signal are eliminated by a bandpass filter consisting of a three stage variable ca pacitor The resulting signal goes to the first mixer is mixed with the first local signal from the PLL circuit then converted to the first IF of 8 83 MHz The unwanted near by signal components then eliminated by a two Rating 8830 kHz Center freguency fo Pass bandwidth 6 kHz or more at 3 dB E 20 kHz or less at 40
169. of the effective tone pari esceeds the preset time The guard lime is preset by connecting CR Power supply terminal Normally 5V 45 TM 742 A 742 El942 A CIRCUIT DESCRIPTION Data transfer direction 21 2 Reference oscillation Da Ds Dc Do I frequency division ratio Do DeD Da Comparison frequency division ratio gt __ ss a 97211 epeen I 514 BRI cok _ RESET _ __ Po 12800 8 x Reference oscillation Special bit function PLL data to bit relationship frequency division ratio 4 REF Reference oscillation frequency division ratio 16000 f kHz 5 kHz P 320 6 25 kHz P 256 Reference oscillation frequency division ratio 6789 00000010100 0000000010 0 17 16 15 14 13 121110987654321 0 0 0 0 0 0 0 010 1 0 0 0 000 01 40 5 kHz 0 0 0 0 0 0 0 010 0 0 0 0 0 0 01005 25 kHz Fig 46 M56760 PLL DATA 16 16 34 Data PL Mo 14 18 1 7 n fae 2 m w 5 9 13 17 2 4 ic 18 p ae an 2 2 1 For comparison frequency bate Output port 9v sw L H on 20pSnun 021 020 019 018 ____________ 03 032 01 Invalid i gt 1OySinin 10pSm
170. orts of the microprocessor The data communication system is asynchronous and a communication rate of 31250bps is realized Since the connection is checked once every 0 5 se cond by the microprocessor of the control unit side the power turns OFF when the panel unit is removed Control unit Panel block 22 Fig 26 FM IF KCDO4 3 4 12 ALT ON H SG input 0 dB RM voltage V Fixed voltage when ALT is gt 777 OFF Deviation f kHz 0 o 5 10 25 Relationship between the RM voltage and deviation during receive CLOCK IC INITIALIZATION SYSTEM RESET The POWER ON CLEAR function works automatical ly and logics are initialized in this IC S 3520CF when the power is turned ON The system is reset because the POWER ON CLEAR bit D2 of the CNT2 register is stuck at 71 SYSTEM RESET All logics are initialized when the SYSCR bit is set to 44 When cancelling the reset falls down after the build up of CS as shown in Figure 27 More than 220 ps More than 5 xs cs More than 220 gs Cancellation Addrass 11111 Data 0001 MODE register D3 SYSR System reset Fig 27 Reset cancellation timing 742 A 742 E 942 CIRCUIT DESCRIPTION e INITIAL SETTING SETTING REGISTER The clock mode is selected by entering the address 1111 and data 0000 Ordinary mode Clock mode selec t
171. ouanbas4 955 250 050 ZHY d ZHI y y i mm 6 3ndino OSS DR asou 10 QNVNIS 21 uonoisig ZHN 0 6 9 OSS 2 90005011250 2H juawysnipe 1026 20161 1919uJ 09 3ndino OSS 10128 58 10 6 BY SZILUIUIYY S XH X1 dS 1X3 UOIDOISI ZHW 02076 Aduanbaly ZHI 9SS 2H t Bi jaued o andino 955 348 jejeunjo 8U yey L3 XH X1 INV 4894 ZHW OvO 25 ssedpueg yu wdinba iIeuiui l uoneonjis ds 3891 uonipuo9 juawainseayy 5 ZHN 000 05 4Su nb lj 7 22842 ZHW 6 25 5 0 INW 00026 Aduanbasy 71 aow JO AAS 6 2242 ZHW 0t6 8S gt 5 9J0uJ JO AAS 6 72242 ZHW 000 05 2 iusueJ ANY 3Je19uJe Od ZHW 000728 71 5 aJou JO MSp 199u
172. ring lock 8 V during transmission 0 V during reception Lock voltage 11 05 MHz Data input Clock input Enable input CL was sion 0 V during ST reception xO eee Eq Table 8 PLL circuit pin functions HET output 11 05 MHz crystal 8 V during transmis oscillation Fig 9 Downloaded by RadioAmateur EU TM 742 742 E 942 CIRCUIT DESCRIPTION 10 144 TX RX Unit Frequency Configuration The 144 MHz unit incorporates a digital variable frequency oscillator VFO that can freely select a channel step of 5 10 12 5 15 20 or 25 kHz with a Phase Locked Loop PLL synthesizer system The frequency in the receive signal channel is mixed witha first local oscillation frequency of 133 300 137 295 MHz to produce a first intermediate frequency of 10 7 144 147 995MHz MHz This frequency is then mixed with a second local oscillation frequency of 10 245 MHz to produce second intermediate frequency of 455 kHz This is called a double conversion system The signal in the transmission channel is directly oscillatedandfrequency divided by a PLL circuit amplified by a straight amplifier then transmitted 455KHz m 10 245MHz 1 Fig 10 Frequency configuration 144 TX RX Unit Receive Signal Channel Outline For the 144 MHz unit the received signal from an antenna is passed through a low pass filter in the final transmission stage and sent through a transmission reception selectio
173. ristic The signal is then input to an HIC again amplified then demodulated and output from the HIC e Signal strength meter The signal strength meter output voltage of FM IF 122 KCDO4 is supplied to the control unit e Shift register circuit The FS CK and DT serial data from the control unit are sent to IC5 BU4094BF to perform the control operation outlined in the following table 742 742 942 CIRCUIT DESCRIPTION NI TX RX selection L when TX is set TX power selection L when middle and low H when high TX power selection L when high and low H when middle Table 18 1200 TX RX Unit Transmit Signal Channel Outline In the transmission channel the desired frequency is oscillated by half and directly frequency modulated by means of a varicap diode e Modulator circuit The audio signal from the control unit is input to microphone amplifier HIC IC4 KCA04 consists of a preemphasis circuit amplifier limiter and splatter circuit that eliminate unwanted high frequency components The VCO signal is directly frequency modulated by means of a varicap diode in the frequency modulator circuit e Younger stage circuit The signal output from the VCO is input to predrive circuit IC7 09 The amplifier can obtain a stable drive output without adjustment because it has a wide band Power amplifier circuit The signal amplified in the predrive stage is
174. rts No CM73F2H060D CK73FB1H102K C90 2092 05 CC73FSL1H101J CK73FB1H102K CK73FB1H333K CEO4NW1A221M CK73FB1H102K CK73FB1H471K CEQ4NW1C470M CC73FCH1H030C CK73FB1H102K CK73FB1E104K 1 040 CC73FCH1HO20C CC73FCH1HO60D CC73FCH1HO70D CC73FCH1HO70D CEO4NW1C100M CK73FB1H102K CC 73FSL1H101J CK73FB1H103K CK73FB1H102K CC73FCH1HO20C CK73FB16223K CK73FB1H102K CC73FCH1H150J CC73FCH1H330J C05 0346 05 C05 0371 05 E22 0672 04 E72 0406 04 E30 3009 15 E30 3010 15 0 3007 05 40 5461 05 11 0442 05 804 0154 05 F10 1444 03 10 1446 04 F10 1477 24 F10 2012 04 F51 0017 05 G02 0599 04 602 0600 14 602 0704 04 G02 0705 04 G09 0426 05 G11 0655 04 G11 0656 14 G11 0660 04 G11 0661 04 G13 0841 04 613 1319 04 430 440M TX RX UNIT X57 3590 XX CHIP C CHIP C ELECTRO CHIP C CHIP C CHIP C ELECTRO CHIP C CHIP C ELECTRO CHIP CHIP CHIP CHIP CHIP CHIP CHIP CHIP ELECT CHIP 9 CHIP TRIM CAP TRIM CAP C R c C TM 742 A 742 942 A Description 6 0 1000 10UF 100PF 1000PF 0 033UF 220UF 1000PF 470PF 470 3PF 1000PF 0 10UF APE 2 0PF 6PF 10UF 1000PF 100PF 0 010UF 1000PF 2 0PF 0 022UF 1000PF 15PF 33PF C C ROAR 0 OOKKO TERMINAL BGARD TERMINAL BOARD
175. s input to power module 10 and amplified to the specified level 220 TX RX Unit PLL Synthesizer The VCO and PLL circuits are housed in a solid shielding case as a hybrid integrated circuit son frequencies are produced by dividing a 12 8 MHz reference oscillation frequency by 2248 and 2560 to correspond to the 5 10 12 5 15 20 and 25 kHz channel steps For 220 MHz the relationship between fyco RX and each frequency division ratio is given by 220 30 825 1 28 o R Where f VCO output frequency n Binary 10 bit programmable counter setting value A Binary 7 bit programmable counter setting value fosc Reference oscillation frequency of 12 8 MHz R Binary 10 bit programmable counter setting value 2560 In this case nis 295 and Ais 75 Therefore fyeg 295x128 75 x12800 2560 33760 75 x5 189 175 MHz The following table lists the pin functions of the PLL circuit TM 742 A 742 942 CIRCUIT DESCRIPTION APC circuit The automatic transmission output control circuit APC detects and partially amplifies the power amplifier output with a diode and controls the output control voltage The control voltage is output in inverse proportion to the output so the control voltage output is always constant e 8T 8 V during transmission and unlock signal A 0 7 V voltage is applied to the base of Q13 during reception O13isturned on and O14 and Q11 areturned off No voltage
176. scillation frequency of 12 8 MHz Binary 14 bit programmable reference counter setting value 2048 in 12 5 and 25 kHz steps 2560 in 10 and 20 kHz steps For 1260 MHz RX 1260 59 7 x 180 A x 12800 2560 600 15 MHz In this case n is 937 and A is 94 fco T 0 V during transmission EB Enable input mee Table 19 HET output TM 742A 742 942 CIRCUIT DESCRIPTION Unlock circuit Whena PLL circuit is unlocked during transmission the LD pin of a IC11 set low and Q12 is set off Q11 is then set on The 8T line is not activated when 8T switching contro circuit Q13 is set off ON during reception ON during unlock OFF during lock Fig 23 Unlock Circuit ALT Automatic Frequency Locked Tuning Circuit The biock diagram of the ALT unit is shown Fig 24 ALT system uses portion of the second local oscilla tor signal mixer and the FM IF KCD04 module to form a feed back circuit that is used to provide analog au tomatic frequency control When the first IF 69 7 MHz changes due to a shift in the transmitter frequency a corresponding shift will occur in the second intermediate frequency A portion of this second IF signal is detected This correction voltage is amplified NJM4558M and is used to control D1 and D2 via analog switch MN4066BS TP1 can be used to check the value of this control voltage D1 and D2 are in series with the 59 245 MHz oscilla
177. set when it is stuck at 17 and gets at the ordinary mode when it is stuck at 0 10 month column counter 1 year column counter MSO and 51 are used to switch the mode Since the 10 year column counter clock mode is used this time 070716 entered in these registers Control register 1 CONTROL REGISTER 1 1 1101 Control register 2 Fr D3 D2 D1 DO 1 1 35 TM 742 742 E 942 A CIRCUIT DESCRIPTION TPS is used to select reference signal output wave form 1 Hz is outputted when it is 1 and 1024Hz is outputted when it is 0 Since 1Hz output is selected this time it is stuck at 1 SOADJ is used to carry out 30 adjustment and 30 second adjustment is carried out when it is stuck at 17 The operation gets at the ordinary mode when it is stuck at O CNTR is used to reset the counter The operation gets in the reset mode when it is stuck at 17 and after that the content of the specified counter is reset The opera tion gets at the ordinary mode when it is stuck at O 24 12 is used to switch the display mode The 24 hour display mode is selected when it is stuck at 1 and the 12 hour display mode is selected when it is stuck at 0 This time it is stuck at 1 because the 24 hour display mode is selected CONTROL REGISTER 2 This is the flat used to detect the state when the operation is in the clock mode CONTROL REGISTER 2 CNT2 1110 D3 D2 D1 D
178. supply terminal 8 End power supply terminal 4 Output terminal 8 Fin earth Electrical characteristics a Vcc 12 5V Power module M57774 220 TX RX UNIT e Equivalent circuit diagram Input terminal First power supply terminal End power supply terminal 4 Output terminal G Fin earth Standard value Conditions Minimum Standard Maximum 220 Pin E F E s e Electrical characteristics 69 TM 42A 742 E 942 70 SEMICONDUCTOR DATA Power module M57788M 430 TX RX UNIT Equivalent circuit diagram External view Input terminal 2 First power supply terminal Driver power supply terminal 4 End power supply terminal 5 Output terminal 6 Fin earth 5 Standard value ymbol Te Vcc 12 5 Pin 400mW 29 ZI 500 Same as above Same as above Power module M67711 1200 TX RX UNIT Equivalent circuit diagram External view Input terminal First power supply terminal Driver power supply terminal End power supply terminal d 5 Output terminal e Electrical characteristics Fin earth Standard value Symbol Tc C coda E Vcc 12 5 V Vbb 10V 29 1 W Zg 71 500 TM 742 A 742 942 A PARTS LIST CAPACITORS 45 TH 220 J 45 Color Capacitor value 1 0 3 0
179. tain a stable drive output without adjustment because it has a wide 430 TX RX Unit PLL Synthesizer The VCO and PLL circuit are housed ina solid shielding case as a hybrid integrated circuit Comparison frequencies of 6 25 and 5 kHz are produced by dividing a 12 8 MHz reference oscillation frequency 2048 and 2560 to correspond to 5 10 12 5 15 20 or 25 kHz channel steps For 430 MHz the relationship between fyco and each frequency division ratio is given by fyco 430 21 6 In x 128 A x fosc Where fuco VCO output frequency n Binary 10 bit programmable counter setting value A Binary 7 bit programmable counter setting value fosc Reference oscillation frequency of 12 8 MHz 8R 1C 3 Shift register D7 band An APC circuit controls the collector voltage in the younger final stage e Power amplifier circuit A drive signal is input to power module IC7 and amplified to the specified level APC circuit The automatic transmission output control circuit APC detects and partially amplifies the power module output with a diode and controls the output control voltage The control voltage is output in inverse proportion to the output so the control voltage output is always constant To protect the set against excessive temperature rise the high power unit has a thermal switch The high power unit is automatically set toa low power by the thermal switch when it exceeds the specified temperature
180. ter Increment of the data Counter address Register 4 bit data entered form Sin Figure 30 31 shows the writing timing ig 30 Counter write timing EXAMPLE OF DATA WRITING Example of counter writing cs Figure 32 shows the example which consists of writ yin Rad ers cere ons sere Figure 33 shows the example which consists of writ Sin ene 00002020 Den eart ing the ing in the control register 1 Register address Data given to Refer to the reset backup circuit for the backup Fia 31 the register WE ig Register write timing we To cs 4 cs Clock 8 bit Clock 8 bit Clock 8 bit SCK Sin Ae aa 1 800765501 10 si Address 00101 of control 00101 register 1 and data to be written are set So Address of 1 minute Address of 1 minute ut digi 13 ouptutted digit and data Address of control with addition of with addition of Sout register 1 and written 1 are outputted 1 are outputted data are outputted Fig 32 Fig 33 23 742 A1742 942 CIRCUIT DESCRIPTION 24 PANEL UNIT KEY ROTARY ENCODER INPUT CIRCUIT Each key of the panel unit is inputted in one port Moreover the rotary encoder is directly inputted in the microprocessor e DISPLAY CIRCUIT The display circuit consists of two LCD dirvers locat ed at the panel unit and their peripheral circuits Figure 34 and all processings are carried out by the microcom puter located at the pan
181. tool during adjustment especially trimmer coil adjustment 556 protection do not connect a microphone to the microphone socket during receiver block adjust ment Check that the power switch is off before the power cord is connected e The SSG output level is displayed at the release end After setting the various controls as shown in Table 23 make sure that the indications of the display and the LEDs are as shown in Figure 56 when the POWER switch is turned ON while pushing the MR key 42 742 E 942 ADJUSTMENT e 144 MHz Band TM 742 A E TM 942A Common Section Adjustment Measurement Measurement point Test Terminal equipment TP2 1 Lock 1 Frequency 144 040MHz Digital TX RX Check the voltage Receive voltmeter voltage check The DC power supply must be set to the rated voltage Receiver Section Adjustment Measurement Measurement point LEES point Test Specification equipment Bandpass 1 Frequency 144 040MHz Digital uc Adjust so that the Voltmeter reading is filter BPF SSG output 0 dBu voltmeter voltmeter reading maximum SSG IS maximum Modulation 1 KHz Deviation 3 KHz Receive adjustment 12 dB SINAD or more Distortion meter Millivoltmeter Oscilloscope SSG 1 Frequency 144 040 MHz 145 940 MHz 147 940 MHz SSG output 9 dBu Modulation 1 KHz Deviation 3 KHz Receive sensitivity check Press the MHz key 12 SINAD or mor
182. tor circuit and provide voltage contro of this oscillator VCXO Voltage con trolled oscillator Therefore fluctuations of the second IF cause a corresponding change in the second loca os cillator circuit which keeps the frequency of the second IE within the bandwidth of the IF filter This system main OFF during transmission e Predrive circuit 09 The VCO output is amplified by 022 then input to pre drive circuit HIC 7 An average 22 to 23 dBm output is obtained by inputting 0 dBm through three stage 2SC4093 and 25 3357 x 2 amplification An alumina board and hybrid integrated circuit are used to ensure stable circuit operation Drive circuit HIC KCB10 The VCO output is amplified by KCB09 then input to drive circuit HIC Anaverage 29 dBm output is obtained by inputting 20 dBm through one stage 25 3814 amplification integrated radiation plate and alumina board are used to attain a stable output against heating tains close agreement between the transmit and receive frequency bandwidths In practice the receiver frequen cy and transmit frequency are automatically maintained in close agreement The center voltage of the vari cap diode is set by a voltage divider circuit Stability of this voltage is maintained by a voltage follower circuit When the ALT circuit is off the control voltage applied to the vari cap diode is switched to this fixed voltage divider circuit in order to set the secon
183. tside band 0 V within band Mixer RF amplifier RF output 8 V B V within band 0 V outside band 8 RF input Operation during reception 28 MHz band Operation during reception Operation during reception 8 83 MHz ON when ATT is ON OFF during out of band reception TM 42A 742 942 DESCRIPTION OF COMPONENTS No 2 In band out of band power switch Q6 OFF Q7 ON In band reception Q6 ON Q7 OFF Out of band reception o Second local oscillator buffer Operation during reception 9 285 MHz Squelch hysterisis switch ON while busy Transmit receive power switch 8V during reception 0V during transmission 2N while locked 0 7V while unlocked 010 014 024 010 012 013 OFF 011 014 024 During transmission Q10 012 013 024 011 014 OFF During reception 28 29 695 MHz During transmission 36 83 38 525 MHz During reception Middle not for 10 W LOW Power switch Q23 Operation during transmission Q25 and Q26 OFF During FM reception 025 026 AM FM selection switch Q25 and 026 ON During AM reception 55 TM 742 742 942 56 DESCRIPTION OF COMPONENTS No 3 Use Function 2 ON Narrow Transmission band selection switch OFF Wide D1 OFF D2 When ATT Dee 01 ON and D2 OFF When ATT OFF Co 7177 O eS i gt a s w dr s TT Coe 377 p Downloaded RadioAmate
184. unit during transmission and input to shift register IC1 Pin 4 of IC1 is then made low Therefore Q13 is turned off Q14 and during reception during transmission LPF Circuit Fig 8 Q11 are turned on An 8 V voltage is applied to the collector BT of Q11 If the PLL circuitis unlocked during transmission the LD pin goes low Q24 is turned off Q13 is turned on Q14 is turned off Q11 for 8T switching control is turned off and the 8T line does not operate 8T 8C 0 7 during unlock 2 V during lock O TMA AEA CIRCUIT DESCRIPTION e 50 TX RX Unit PLL Synthesizer A Binary 6 bit programmable counter setting value The VCO and PLL circuits are housed in a solid fosc Reference oscillation frequency of 11 05 Mrz shielding case as a hybrid integrated circuit Compari R Binary 16 bit programmable counter setting value son frequencies are produced by dividing a 11 05 MHz in this case n is 189 and Ais 23 I reference oscillation frequency by 2210 to correspond Therefore 189x64 23 x1 1050 2210 to the 5 10 15 20 and 25 kHz channel steps 12096 23 5 For 50 MHz the relationship between fyco RX and 60 595 MHz each frequency division ratio is given by The following table lists the pin functions of the PLL fa 19071 0 595 nx64 Alxfgg R circuit Where f VCO output frequency Binary 10 bit programmable counter setting value Pin name IC2 KCH10 Modulation input 2 V du
185. ur EU TM 742 A 742 E 942 DESCRIPTION OF COMPONENTS 50 TX RX Unit 57 3800 01 UT 50S M No 1 Use Function Operation Condition Compatibility Shift register See Circuit Description Low frequency amplifier limiter Microphone amplifier IC1 IC2 IC3 IC4 50 MHz band transmission Operation during transmission 50 53 995 MHz IC5 IC6 IC7 9V AVR 9v 13 8V iC8 6 01 02 04 Q5 2 V during locking Modulation input 9 285MHz 8 V during transmission 0 V during reception Lock voltage Data input ______4 pp Clock input l Enable input ql output Drive Second local oscillator mixer First IF input 10 595 MHz 8 Second local oscillator input 11 05 MHz IF amplifier detector Low frequency amplifier Squelch output busy signal 0 V while busy Noise detector Noise detection voltage output DC Signal strength meter output Squelch switch Detection output 4 RD output AF OUT D Input Output ut of band reception HET input 2 IF output 8 V 8 V outside band 0 V within band Mixer RF amplifier RF output 6 V 8 V within band 0 V outside band RF input High frequency amplifier Operation during reception 50 MHz band First IF amplifier Operation during reception 10 595 MHz 57 742 A 742 E 942A 58 DESCRIPTION OF COMPONENTS No 2 i warrks pos wwr war Transmit receive power switch 8V durin
186. wer selection L when high and low H when middle ______ _______ 21 145 kHz to produce a second intermediate frequency of 455 kHz The unwanted near by components of the intermediate frequency signal are eliminated by an FM ceramic filter The intermediate frequency signal is input to again The second intermediate frequency signal is amplified and detected by IC1 to produce an audio signal e Signal strength meter The signal strength meter output voltage of FM IF HIC IC1 KCD04 is supplied to the control unit e Shift register circuit The ES CK and DT serial data from the control unit are sent to IC3 BU4094BF to perform the control operation outlined in the following table Table 17 TM 742 742 E 942 CIRCUIT DESCRIPTION 430 TX RX Unit Transmit Signal Channel e Outline In the transmission channel the desired frequency is directly oscillated and directly frequency modulated by means of a varicap diode e Modulator circuit The audio signal from the control unit is input to microphone amplifier IC2 KCA04 1C4 consists of a preemphasis circuit amplifier limiter and splatter circuit that eliminate unwanted high frequency components The VCO signal is directly frequency modulated by a varicap diode in the frequency modulator circuit Younger stage circuit The signal output from the VCO is input to drive circuit HIC IC6 KCB14 The amplifier can ob

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