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IC-M45A Service Manual

1. R79 Output power adjustment Sensitivity adjustment R106 Freguency deviation adjustment C85 PLL lock voltage Reference freguency check point adjustment PLL lock voltage CP2 adjustment Sensitivity check point Audio generator 300 Hz to 3 kHz E Ni ODORE SECTION 5 PARTS LIST LOGIC UNIT LOGIC UNIT ORDER TE ES wra 8900005320 FFC 519 ORDER ER era 1140008330 S IC UPD789406AGK A03 9EU 1140005620 S IC 250805 2 7 6 1110004920 S IC S 80934ANMP DDY 0910051452 POB B 5321B 8930045650 LCD CONTACT SRCN 2040 SP N W 1590000660 S TRANSISTOR DTC144TU T107 1520000450 S TRANSISTOR 25 1132 T100 Q 1590000670 S TRANSISTOR FMW1 T148 s 1750000020 S DIODE 155184 TE85R 1750000550 S DIODE 155355 17 1750000020 S DIODE 155184 TE85R 1750000550 S DIODE 155355 TE 1 1750000020 S DIODE 155184 TE85R 1750000130 S DIODE DA204U T107 VR A UNIT ORDER mn 7210001500 VARIABLE RKO97111102AA 10 6 5 Ice p 6060000630 S CERAMIC PBRC 4 91 BR 8900009060 CABLE OPC 893 7030003580 S RESISTOR ERJ3GEYJ 153 V 15 0910051461 B 5322A 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003630 S RESISTOR ERJ3GEYJ 393 V 3
2. 6 2 MICROPHONE 7 EMI CONDUCTOR INFORMATIO 8 BOARD LAYOUTS LOGIC UN ara 827 MAN UN 9 BLOCK DIAGRA 10 VOLTAGE DIAGRAM 1094 LOGIC ed dra prae an bik pawasqa 102 MAIN UNI adem ant dd aaa Ba kiqa qa 10 3 VR BUNITS TABLE OF CONTENTS SECTION 1 GENERAL Frequency coverage Mode Usable channels Power supply requirement Usable temperature range Frequency stability Current drain at 13 8 V DC Antenna impedance Dimensions projections not included Weight with ant battery case and cells TRANSMITTER Output power at 13 8 V DC Modulation Maximum frequency deviation Spurious emissions Adjacent channel power Residual modulation Audio harmonic distortion Audio frequency response RECEIVER Receive system Intermediate frequencies e Sensitivity Squelch sensitivity Adjacent channel selectivity Spurious response Intermodulation rejection ratio Hum and noise Audio output power at 13 8 V DC Audio frequency responce Iransmit SPECIFICATIONS 156 025 157 425 MHz Tx 156 025 163 275 MHz Rx 16KOG3E FM All USA international and Canadian channels plus 10 weather channels 13 8 V DC 10 negative grou
3. AN e ani PTT q R106 27k C143 1 2 RV 153 0 001 43 5 R91 C140 B O ie L 10k 22 10 da 5 RM me d R107 GNE 5 10k Took AF2 JE 5 O ss sad d7 uk ak 5 UNLK m 5 DA im 777 777 55 5 RMUT 515 su r RS I 1k 3 18 V E 3 Die L i ki 178 174 1 C 0 1 0 1 4 93V Tx O V na Rx 0 V Rx 4 92V 22 20 8 2K JI 2SB1132R 2SB1132R 2SC2712Y B8B ZR SM3 TF sai 42 x _ SON 4 s 5 lt ds 5 021 q 6 E RN1404 6 7 5 7805 R124 Eoo dg z gt C159 J 01 018 019 DSA3A1 RN1404 C160 VY 10 1 N 10 3 VR A AND VR B UNITS VR A UNIT VR B UNIT QOO BS lt j 5 z 5 z lt gt 2 10 3 Icom Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan Phone 06 6793 5302 Fax 066793 0013 Icom America Inc Corporate Headquarters 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 425 454 8155 Fax 425 454 1509 URL http www icomamerica com lt Customer Service gt Phone 425 454 7619 Icom Canada A Division of Icom America Inc 3071 5 Road Unit 9 Richmond B C V6X 2T4 Canada Phone 604 273 7400 Fax 604 273 1900 Icom Australia Ptu Ltd A C N 006 092 575 290 294 Albert Street Brunswick Victoria 3056 Australia Phone 03 9387 0666 Fax 03 9387 0022 URL htip www icom net au
4. C1608 JB 1H 102K T A C1608 JB 1H 102 C1608 JB 1C 223 C1608 JB 1H 102 C1608 JB 1E 103K T A ECWU 1C 223JB5 ECST1CY105R ECST1AY225R C1608 JF 1C 104Z T A S ELECTROLYTIC 16 CV 10 BS S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC C1608 JB 1C 104KT N C1608 JF 1C 224Z T A C1608 CH 1H 101J T A C1608 JF 1C 104Z T A C2012 JF 1C 105Z T A C1608 JB 1E 103K T A C1608 JB 1E 103K T A S ELECTROLYTIC 16 CV 10 BS S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S TANTALUM S TANTALUM S CERAMIC C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1C 104KT N C1608 JB 1C 473K T A C1608 CH 1H 181J T A C1608 CH 1H 181J T A C1608 JB 1C 104KT N C1608 JF 1C 104Z T A ECST1CY105R ECST1AY225R ECST1VY104R C1608 JB 1H 471 MAIN UNIT 4030007050 4030009530 4030007040 4030007070 4030009530 4030006860 4030009530 4030009530 4030011600 4030011600 4030006860 4030011600 4030006860 4030006860 4030007040 4610002150 4030007010 4030006860 4030006860 4030008880 4030006900 4030009560 4030006860 4030009920 4030006860 4030009990 4030007020 4030006860 4030008630 4030007040 4030008630 4030008630 4030006860 4030006860 4030007010 4030006860 4030007040 4030006860 4030006860 4030006860 4030007020 4550002830 4030006860 4030006860 4510004590 4030006860 4030006850 4510007300 4030008630 4030006860 4030006860 403000
5. BLACK WHITE Q 8 1150001540 SC 1302 8510011690 2040 Module plate REF NO ORDER NO DESCRIPTION 7700001600 KUC 2123 030245 MAIN UNIT MP11 C SN D MP10 C 4 MP8 L MP11 p 7 MP2 C UNIT abbreviation C CHASSIS PARTS L LOGIC UNIT M MAIN UNIT VA VR A UNIT VB VR B UNIT W1 C SECTION 7 SEMI CONDUCTOR INFORMATION e TRANSISTOR AND FET S 2SB1132 Q Symbol BAQ 25 3268 Symbol Bi 2SK302 V Svmbol TV D 5 RN1402 Symbol XB e DIODES 1SS184 Symbol B3 HSM88ASR Symbol C3 2SB1132 R Symbol BAR ej 2SC3775 3 Symbol OY3 P 2SK880 Y Symbol XY RN1404 Symbol XD 155196 Symbol G3 HVU350 Symbol 4 7 2581143 5 25 2712 Y 25 2714 Symbol B1143 Symbol LY Symbol QY E SEY H X B E C 2SC4215 O 2SD1664 Q 2SJ144 Y Symbol QO Symbol DAQ Symbol VY P der 3SK131 L DTC144 TU FMWI Svmbol V12 Svmbol 06 Svmbol W1 di bl XP6501 AB Symbol 5N E E B B C 155321 155355 DA204 0 Symbol F9 Symbol A Symbol K MA77 MA338 MA862 Symbol 4B Symbol 6H Symbol M11 I MIL SECTION 8 BOARD LAYOUTS 8 1 LOGIC UNIT e TOP VIEW TO MAIN UNIT J4 3 1 2 MICROHON e VR AUNIT e VR BUNIT UNIT J1
6. Y Y 1931OHd 1519 1910 sna viva b 180 Qun V HA JSHJAJH Lsa esa zsa LINN 21901 id 921 MS HAMOd Ga lt a ODA lt 3NH XL gt gt 80 gt INIT NOWINOO gt TM HOLIMS NH3LIVd x lt x 13S3H H3009 V M am gt b B 01 JNOL gt d338 glo 1810 Qun V HA 19 r Eum 4 a Dl gt k te Co zb O 818 x 19 221 U O wun g HA dv Y vid 13 JAYA va o e d ld LNO du daMOd dd XH XL iq m P MS LNY o co AN eol N DINVHAD cld LNY SECTION 9 SECTION 10 VOLTAGE DIAGRAM 10 1 LOGIC UNIT DS1 LM 1798B J JJ R15 14 10k 10k C10 o 1990 5V D e 4 91 MHz R4 R2 100k 100k 510 P40 KRO 511 PA1 KR1 512 P42 KR2 513 P43 KR3 514 P44 KR4 515 P45 KR5 P93 S16 IC i ih P92 S17 Xn X1 PBRC 4 91 BR P91 S18 IC1 XT2 f OH a 90 519 UPD789406AGK A03 9EU VDDO P87 S20 vsso P86 S21 P85 S22 P84 S23 P83 S24 P82 S25 P81 S26 P80 S27 1 CMPREF 0 CMPINO 6 5 4 3 2 L J P27 INTPS CPT5 P26 INTP2 TO5 P25 INTP1 TI1 P24 INTPO TIO P23 CMPTOUTO TO P22 SI RXD P21 SO TXD P66 AN AVSS 05 155184 TXDET 45 B mM J SP1
7. F45G07 4 R19 100k J W2 Ji to MAIN I SP unit J4 w3 z 71 el 9901 O BEEP BEEP O m m O H H Pro B E oe 30118 Kawi ming _ sr Osmo SEND 2 E Oroes 3 E E CH 9 E ne L sa 9 T 9 Oonk T 3 RIT 9 9 mE H Q2 nm oom H SOLV e s 3 7 H F E r ws 5 A 3 H 5V o 2 C3 q DIM3 9 59 V 0 01 DIM2 6 13 V L DIM1 3 50 V iy DIMO 0 00 V IC3 DTC144TU e ie S 80934ANMP DDV R22 68 k R13 R12 R25 47 k 1k Tk 14 1 0 01 pis R28 R26 KEYM d 1 Q 2 10 1 to LOGIC unit J1 10 2 MAIN UNIT TROY DET Rx 1 98 V R22 TONE 1 5K 55 mA c51 ATO ud Soc 5 0001 Q44 m FL 310 FIS FL 310 NIN A TV L C6 L2 L1 ANT im 2 R20 L5 SP LA 243 0 001 LA 243 LA 253 C57 Q3 60 SOLC 0 047 10V 001 R32 470 25 2714 4 Q1 C13 cj 610 ER 3SK131 L ov 2 02 top Rx 1 52 V 3SK131L _____ A 57 2 R13 7 39nH 36 C3 C2 Tx 0 V 100 k Tx 0 V E Rd XB15A308 22 P 24 P 8P TA31136FN 5 E Bx 0 52 V Rx 0 4 V T T T R25 10k R4 o 2S
8. 62 156 125 160 725 _ 157 175 161775 10 156 500 62 156 125 156 125 83A 8 157 175 157 175 1 156 550 63 156 175 160 775 161 825 156 600 1564175 156175 157225 157225 156 700 156 225 166225 654 157275 157275 5 15 156 750 156 750 65 156 275 160 875 86 86 86 157 325 161 925 6 156 800 65A 65A 65A 156 275 156 275 86A 157 325 157 325 17 156 850 156 850 66 156 325 160 925 161 975 161 550 68 156 425 156 425 uk 157 425 A 156 950 156 950 69 69 69 156 475 156 475 157 000 161 600 70 70 70 156 525 156 525 157 00 156 575 Low power only Momentary high power 2 Receive only NOTE Channels 3 21 23 61 64 81 82 and 83 CANNOT be used by the general public in USA waters O gt gt 7 N eae S z gt gt 4 CD x M O N O D Co N A x N N E o I9 gt gt gt N N co Oo N O B 2 O Weather Frequency MHz Weather Frequency MHz chaning Eh nnel 162 550 WX06 162 500 wxo2 162 400 Wo 162 525 SECTION 2 DISASSEMBLY INSTRUCTIONS e REMOVING THE CASE e REMOVING THE MAIN UNIT D Unscrew 4 sc
9. Asia Icom Inc 6F No 68 Sec 1 Cheng Teh Road Taipei Taiwan R O C Phone 02 2559 1899 02 2559 1874 Icom Europe GmbH Communication Equipment Himmelgeister Str 100 D 40225 Dusseldorf Germany Phone 0211 346047 Fax 0211 333639 URL http www icomeurope com Icom Spain S L Crta de Gracia a Manresa Km 14 750 08190 Sant Cugat del Valles Barcelona SPAIN Phone 93 590 26 70 Fax 93 589 04 46 URL http www icomspain com Icom UK Ltd Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 01227 741741 Fax 01227 741742 URL http www icomuk co uk Icom France S a Zac de la Plaine Rue Brindejonc des Moulinais BP 5804 31505 Toulouse Cedex France Phone 561 36 0303 Fax 561 36 03 00 URL http www icom france com Count on us Icom Inc S 13601Il CD 6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan 1999 Icom Inc
10. Q7 buffer amplified at Q8 and 210 are then sent to the T R switch 011 The receive LO signal is applied to the 1st mixer circuit 2 through low pass filter and the transmit signal is applied to the pre drive amplifier 011 A portion of the VCO output is reap plied to the PLL IC IC2 2 or pin 19 via Q9 3 4 POWER SUPPLY CIRCUITS LINE DESCRIPTION The voltage from the connected DC power sup ply Same voltage as the HV line which is passed through the PWH switch VR A unit R1 Common 5 V converted from the HVS line at the regulator circuit IC6 Receive 5 V converted from the 5V line at the R5 regulator circuit 021 022 The regulated volt age is applied to the receiver circuits T5 Transmit 5 V converted from the 5V line at the T5 regulator circuit Q19 Q20 eu to transmitter circuit to 1st mixer circuit Am nn m n jul Buffer IC3 PLL IC 9 PSTB CK lt 5 DATA 3 5 ALLOCATIONS 3 5 1 CPU LOGIC unit number name name Input port for the weather alert tone decode signal Low Weather alert tone 1050 Hz is detected Input port for the PLL unlock signal UNLK Low While PLL is locked Input port for the connected power supply voltage detection low battery indicator 44 PITO Input port for the PTT switch Input port for the TX indicator from 45 TXDE
11. S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S TRIMMER S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S TRIMMER S RESISTOR S RESISTOR S RESISTOR S RESISTOR RR0816R 433 D 43 ERJ3GEYJ 225 x 2 2 MQ ERJ3GEYJ 472 V 4 7 ERJ3GEVJ 103 10 ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 122 V 1 2 ko ERJ3GEYJ 104 V 100 ERJ3GEYJ 471 V 470 ERJ3GEVJ 103 V 10 103 V 10 ERJ3GEYJ 152 V 1 5 ERJ3GEYJ 391 V 390 ERJ3GEYJ 334 V 330 ERJ3GEYJ 473 V 47 ERJ3GEYJ 152 V 1 5 ERJ3GEYJ 273 V 27 ERJ3GEYJ 563 V 56 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 274 V 270 ERJ3GEVJ 100 V 10 ERJ3G
12. i B ri a 8 2 MAIN UNIT FROM MICROPHON FROM VR A UNIT P1 6133 C155 wa 134 Rita C156 co o C169 o Ri24 C16 C116 Y A z H H LI g NZ R110 4 laa E m m E E E Y e Je SP 5 2 BUE 3 S R115 R119 Dno R128 FROM LOGIC UNIT J1 4 h CiS L20 112 D18 ah O C122 Ga R71 E ES i J2 i Qc 1 R83 R68 c120 C123 B LC R74 137 6138 s LINZ R80 5 co LO 9 143 IC3 NN 5 79 co a 8 T lt C89 1 BEE ens R55 R42 a jr S S sli i FI2 O J4 Lo Ba 5 BEBE J m 2 m LE x C44 R23 C126 D19 Pi m CN olol ko O 28 O H Jp E R63 C103 E a C81 R52 C179 C14 m R10 R5 5 B C34 C81 C33 C91 cs 28 R14 C32 Bi FI R21 c13 H a W D1 Q B H O zx B El w a a R a N N El Lom U Le N O N 5 ces N co ddl SIM JIN SI SS AG
13. 030003460 7030003680 7030003400 S FET 2SJ144 Y TE85R S TRANSISTOR 2SC2712 Y TE85RTEM DIODE S VARICAP S VARICAP S VARICAP S DIODE S VARICAP S VARICAP S DIODE S DIODE S DIODE S DIODE S DIODE S DIODE S DIODE DIODE DIODE S DIODE S VARICAP MONOLITH CERAMIC MONOLITH XB15A308 HVU350TRF HVU350TRF HVU350TRF 155321 TE85R MA338 TX MA338 TX MA77 TX 155196 TE85R MA862 TX 155196 TE85R HSM88ASR TR HSM88ASR TR DA204U T107 DSA3A1 XB15A308 MA77 TX HVU350TRF FL 310 ALFY450E FL 310 S DISCRIMINATOR CDBCA450CX24 S XTAL COIL COIL COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL COIL COIL S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR CR 659 21 25 MHz LA 253 LA 243 LA 243 LON 1A 39NJ04 0 30 1 7 8TL 60N 0 30 1 7 8TL 60N NL 252018T 047J NL 252018T 047J NL 322522T R82J 3 NL 252018T 1R0J NL 252018T 1R0J LB 257 NL 252018T 1R0J NL 252018T 1R0J NL 252018T 1R0J MLR1608M R10K T MLR1608M R10K T MLR1608M R10K T NL 252018T 082J NL 252018T 082J LA 243 LW 25 ERJ3GEYJ 105 V 1 ERJ3GEYJ 393 V 39 ERJ3GEYJ 473 V 47 ERJ3GEYJ 104 V 100 ER
14. 30 CONNECTOR B07B EH S 6450001060 CONNECTOR HSJ1493 01 010 6510021720 S CONNECTOR 30FLT SM1 TB 7030003970 0910051442 S JUMPER PCB MCR18EZHJ JPW 000 B 5320B S Surface mount 5 4 SECTION 6 MECHANICAL PARTS AND DISASSEMBLY 6 1 CABINET PARTS CHASSIS PARTS ACCESSORIES nam ORDER NO DESCRIPTION MS ORDER DESCRIPTION an 6510004880 Antena connector MR DES 01 8900009040 Cable OPC 891 Optional product Microphone HM 124B BLACK 8950005110 2289 MIC hanger Optional product Microphone HM 124W WHITE 8010017250 2040 Mobile bracket BLACK 1 8010017270 2040 Mobile bracket A WHITE 1 2510001040 Speaker F45G07 4 8610010560 2040 Knob bolt BLACK 2 8610010590 2040 Knob bolt A WHITE 2 8900009050 Cable OPC 892 8810004770 Screw PH A0 M3 0x16 SUS 2 8810001490 Screw PH A0 M5x20 SUS 2 8010017263 2040 Chassis 3 1 8850000180 Flat washer M5 SUS 2 8930045700 2040 IC clip 1 8850000500 Spring washer M5 SUS 2 8510011530 2040 Case BLACK 1 8510011550 2040 Case A WHITE 1 8210015210 2040 Front panel BLACK 1 8210015260 2040 Front panel A WHITE 1 8930045260 2040 6 key 1 8930045270 2040 R packing 1 8930045280 2040 F packing 1 8610010550 Knob N 264 BLACK 2 8610010580 Knob N 264 A WHITE 2 8930033470 1542 Jack bush 1 8930045290 2040 Bush plate 1 8810008630 Screw PH M3x6 NI ZU BT
15. 4 3 TRANSMITTER ADJUSTMENTS ADJUSTMENT ADJUSTMENT CONDITION Operating channel ch16 Output power Transmitting MEASUREMENT VALUE UNIT LOCATION MAIN Connect a digital 2 6 V multi meter or oscil loscope to the check point CP1 VALUE NK Rear Connect 26 W High Panel power meter to the antenna connector ADJUSTMENT POINT UNIT ADJUST i MAIN C85 ADJUSTMENT POINT B Operating channel ch16 Rear Connect an 4 3 kHz Output power Low Panel deviation meter to Connect an audio generator to J2 the antenna con pin 5 with an AC millivoltmeter nector through an and set as attenuator Frequency 1 kHz Level 550 mV Set an FM deviation meter as HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 Transmitting 4 4 RECEIVER ADJUSTMENT MAIN R106 ADJUSTMENT POINT MAIN C10 C20 C26 MEASUREMENT UNIT LOCATION ADJUSTMENT ADJUSTMENT CONDITION SENSITIVITVI 1 Operating channel ch16 MAIN Connect DC volt Maximum voltage SQUELCH control meter to the check Max counterclockwise point CP2 Connect an SSG to the antenna connector and set as Frequency 156 800 MHz Level 100 uV 67 dBm Modulation 1 kHz Deviation 13 5 kHz Receiving This output level of a standard signal generator 550 is indicated as SSG s open circuit Dc power supply 13 8 V 15 to DC cable
16. 7 8810008660 Screw PH M3x8 NI ZU 4 8810008660 Screw PH M3x8 NI ZU BT 2 8810004540 Screw BiH M3x8 SUS 2 245 3 asp i Screw abbreviations A BT Self tapping 8810008680 Screw PH M3x8 NI 4 Pan head Flat head BiH Bind head UNIT NI Nickel SUS Stainless DESCRIPTION ZK Black 5030001373 5080000440 5080000440 8900005320 8930045650 8210015200 8930045300 VR A UNIT Rer ORDER NO 7210001500 Variable resistor RK097111102AA 10KA PWR VOL incl nut VR B UNIT ORDER NO MAIN UNIT ORDER NO LCD LD HU4549J 1 Lamp BQ031 30118 Lamp 0031 30118 Cable OPC 519 LCD contact SRCN 2040 SP N W 2040 Reflector 2040 LCD holder DESCRIPTION DESCRIPTION DESCRIPTION H1 7210001010 Variable resistor RK097111000AA 10KB 1 SQUELCH incl nut 6 2 MICROPHONE PARTS CHASSIS PARTS pw ORDER NO 8210013600 8210013590 8210013620 8210013610 8930039780 8930039750 8930039760 8930039730 8930039720 8930039740 8810009250 8810009260 8810009240 8850001610 8900009070 8900009080 MAIN UNIT DESCRIPTION 1823 Front panel 1823 Front panel A Rear panel Rear panel A 1823 Seal 1823 PTT holder 1823 PTT rubber 1823 Key board 1823 Hanger knob 1823 M sheet Screw 0 2 6x16 SUS Screw BO 2 0x6 NI BT Screw Bih M4x10 ZK Spring washer M4 SUS OPC 894 OPC 895 BLACK WHITE BLACK WHITE
17. 8630 4030006900 4030006860 4030011170 4030006860 4030011290 4030006860 4030006860 4030006850 4030006860 4030006860 4030006860 4030006860 4030006860 4030006860 4030006900 4030006860 4510007310 4550006150 4030006860 4030008770 4030007090 4510004630 4030008630 4030006860 4030006900 4510007280 4510007280 4510007280 4030008920 4510004590 S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TRIMMER S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC C1608 CH 1H 220J T A C1608 CH C1608 CH 1H 180J T A C1608 CH 1H 330J T A C1608 CH C1608 JB 1H 102K T A C1608 CH C1608 CH 1H C1608 JB 1C 104KT N C1608 JB 1C 104KT N C1608 JB 1H 102K T A C1608 JB 1C 104KT N C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 180J T A CTZ3S 10A W1 AF C1608 CH 1H 100D T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1C 223 C1608 JB 1E 103K T A C1608 CH 1H R75B T A C1608 JB 1H 102K T A C1608 CH 1H 050B T A C1608 JB 1H 102K T A C1608 CH 1H 200J T A C1608 CH 1H 120J T A C1608 JB 1H 102K T A
18. 9 7030003630 S RESISTOR ERJ3GEYJ 393 V 39 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 VR B UNIT 7030003700 S RESISTOR ERJ3GEYJ 154 V 150 ORDER iii a 7210001010 VARIABLE RKO97111000AA 10KB 0910051470 POB 5323 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003250 S RESISTOR ERJ3GEYJ 270 V 27 7030003250 S RESISTOR ERJ3GEYJ 270 V 27 7030003660 S RESISTOR ERJ3GEYJ 683 V 68 MAIN UNIT ORDER E ET 1110003640 S IC BA1604F T 1110003200 S IC TA31136FN EL 1130007610 S IC uPD3140GS E1 058 1150001540 IC M57710 A SC 1302 1110003750 S IC M5218AFP 600C 1180001070 S IC TA7805F TE16L 1110003090 IC LA4425A 7030003630 S RESISTOR ERJ3GEYJ 393 V 39 7030003650 S RESISTOR ERJ3GEYJ 563 V 56 7030003640 S RESISTOR ERJSGEYJ 473 V 47 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 7030003510 S RESISTOR ERJ3GEYJ 392 V 3 9 7030003490 S RESIS
19. AMIC S CERAMIC S CERAMIC S CERAMIC S TRIMMER S CERAMIC S CERAMIC S CERAMIC S TRIMMER S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S MYLAR S TANTALUM S TANTALUM S CERAMIC ERJ3GEYJ 104 V 100 ERJ3GEYJ 104 V im ko MCR10EZHJ 4 7 4R7 ERJ3GEYJ 102 V 1 ERJ3GEYJ 564 V 560 ko ERJ3GEYJ 822 V 8 2 ERJ3GEYJ 184 V 180 ERJ3GEYJ 272 V 2 7 ERJ3GEYJ 331 V 330 Q ERJ3GEYJ 103 V 10 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 103 V 10 ERJ3GEYJ 222 V 2 2 MCRS50JZHJ 33 Q 330 ERJ3GEYJ 473 V 47 ERJ3GEYJ 183 V 18 ERJ3GEYJ 102 V 1 ko GRM42 6 0800 500PT GRM42 6 CH 240J 500PT GRM42 6 CH 220J 500PT GRM42 6 CH 050C 500PT GRM42 6 W5R 102K 500PT GRM42 6 CH 270J 500PT GRM42 6 CH 360J 500PT C1608 CH CTZ3S 10A W1 AF C1608 CH 1H 070D T A C1608 CH C1608 JB 1E 103K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H R75B T A C1608 JB 1H 102K T A C1608 JB 1C 104KT N CTZ3S 10A W1 AF C1608 CH 1H 120J T A C1608 CH 1H R75B T A C1608 CH 1H 120J T A CTZ3S 10A W1 AF C1608 JB 1H 102 C1608 JB 1H 102 C1608 CH 1H 050C T A C1608 JB 1H 102 C1608 JB 1H 102K T A C1608 CH 1H 150J T A C1608 CH 1H 330J T A C1608 JB 1H 102 C1608 JB 1H 102 C1608 CH 1H 680J T A C1608 JB 1C 223
20. B1132R 43K TER HUUS50 e D4 D3 C20 Je d Ki HVU350 HVU350 10P R86 NU C34 18 17 C19 8 R7 R3 14 68 777 777 Tx O V 0 001 82 nH 47 nH no 0 1 0 001 33 47k 0 01 C49 KDE L V V MAGN a5 04 047 646 IC1 22M EL Rx 2 58V M ba ES Q6 1604 L d O CP1 6 001 1M cao 0 001 02 25016640 XB15A308 XP6501AB I J 030 T HVU350 Tx V nur dd R28 10 k R27 22 T Q 25 2712 001 C126 0 1 18 P 33 C110 12P R82 SP 22 C94 R48 D13 2 0 001 68 k HSM88ASR C97 L18 25 3268 6 001 gt L16 I 0 001 R50 G 0 1 uH 4 011 27618 R70 E 125 1 0 uH 08 TUN a 25637753 90 Tx 25 W 9 88 V 0 001 9 id MA77 C95 Tx 1 W 6 04 V L 1 Map K 20 P Rx 0 V S L12 LB 257 C93 D12 _ r K 5P 4 155196 r J 7 o L Q8 K 7 2SC42150 G9 C96 BOSE 2SK302Y 2SC42150 010 R67 107 J R59 47k 100 0 001 25 42150 68 R78 10 k 0 001 aE 1 15 2MHz java RN1404 gt CH 16 RN1402 ps pa V Tx 25 W 4 94 V R80 Tx 1 W 0 V ark ni vo NA T C148 C147 C138 pO 72 O NE J3 a l sas 30FLT SM1 TB sa R89 1 IC5B rit i IC5A 2 7 k 5218 600 R104 8105 NTCCS20123NH E 5 R100 R R98 R95 5p EEP B 82k Bok 82k 47k R102 33K J2 7 PF dcm M H Mt R94 R90 BO7B EH S o C144 SN 3304 Q24 5 MITA ge 2SJ144Y 2 d Saon 27k nA
21. C1608 JF 1C 104Z T A C1608 CH 1H 180J T A C1608 JF 1C 104Z T A C1608 JF 1C 104Z T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 100D T A C1608 JB 1H 102K T A C1608 CH 1H 180J T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 CH 1H 120J T A TESVD2 1V 685M 12R C1608 JB 1H 102K T A C1608 JB 1H 102K T A ELECTROLYTIC 16 MV 470 HC S CERAMIC S CERAMIC C1608 JB 1H 102K T A C1608 JB 1H 471K T A S ELECTROLYTIC 50 CV 1 BS S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC C1608 JF 1C 104Z T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JF 1C 104Z T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A GRM42 6 CH 180J 500PT C1608 JB 1H 102K T A GRM42 6 CH 240J 500PT C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 471K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1E 103K T A C1608 JB 1H 102K T A S ELECTROLYTIC 16 CV 10 BS S TANTALUM S CERAMIC S CERAMIC S CERAMIC ECST1CY105R C1608 JB 1H 102K T A C1608 JB 1H 562K T A C1608 CH 1H 470J T A S ELECTROLYTIC ECEV1CA100SR S CERAMIC S CERAMIC S CERAMIC C1608 JF 1C 104Z T A C1608 JB 1H 102K T A C1608 JB 1E 103K T A S ELECTROLYTIC 50 CV 2R2 BS S ELECTROLYTIC 50 CV 2R2 B
22. EYJ 681 V 680 0 ERJ3GEYJ 683 V 68 ERJ3GEYJ 681 V 680 0 ERJ3GEYJ 683 V 68 ERJ3GEYJ 391 V 390 Q ERJ3GEYJ 393 V 39 ERJ3GEYJ 102 V 1 ERJ3GEYJ 102 V 1 ko ERJ3GEYJ 473 V 47 ERJ3GEYJ 103 V 10 ERJ3GEYJ 332 V 3 3 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 331 V 330 Q ERJ3GEVJ 101 V 100 Q ERJ3GEYJ 680 V 68 ERJ3GEVJ 101 V 100 Q ERJ3GEYJ 331 V 330 Q ERJ3GEYJ 221 V 220 0 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 472 V 4 7 ERJ3GEVJ 101 V 100 Q ERJ3GEVJ 100 V 10 ERJ3GEYJ 102 V 1 ERJ3GEYJ 101 V 100 Q ERJ3GEYJ 102 V 1 MCR18EZHJ 33 0 330 MCR18EZHJ 33 330 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 332 V 3 3 ERJ3GEYJ 103 V 10 ERJ3GEYJ 221 V 220 0 ERJ3GEYJ 103 V 10 RV 143 RHO3A3AS2 471 ERJ3GEYJ 273 V 27 kQ ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 104 V 100 ERJ3GEYJ 471 V 470 MCR10EZHJ 68 680 MCR10EZHJ 68 680 ERJ3GEVJ 101 V 100 Q ERJ3GEYJ 272 V 2 7 kQ ERJ3GEYJ 272 V 2 7 kQ ERJ3GEYJ 334 V 330 ERJ3GEYJ 103 V 10 ERJ3GEYJ 682 V 6 8 ERJ3GEYJ 103 V 10 ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 823 V 82 ERJ3GEYJ 823 82 ERJ3GEYJ 823 82 ERJ3GEYJ 101 V ERJ3GEYJ 333 V 33 ERJ3GEYJ 273 V 27 S THERMISTOR NTCCS2012 3NH 103KC T 100 9 ERJ3GEYJ 822 V 8 2 RV 153 RHO3A3AN4X02A 333 ERJ3GEY
23. J 103 V 10 ERJ3GEYJ 155 V 1 5 ERJ3GEYJ 104 V 100 ERJ3GEYJ 474 V 470 S Surface mount MAIN UNIT ORDER ORDER mno 030003680 7030003680 7030000100 7030003440 7030003770 7030003550 7030003710 7030003490 7030003380 7030003560 7030003480 7030003560 7030003480 7030001070 7030003640 7030003590 7030003440 4030011100 4030011290 4030011180 4030011070 4030011260 4030011190 4030011220 4030009530 4610002150 4030006980 4030009530 4030006900 4030006860 4030006860 4030009560 4030006860 4030011600 4610002150 4030007020 4030009560 4030007020 4610002150 4030006860 4030006860 4030006960 4030006860 4030006860 4030007030 4030007070 4030006860 4030006860 4030007110 4030008880 4030006860 4030006860 4030008880 4030006860 4030006900 4340000010 4550006150 4550006170 4030008630 4510007310 4030011600 4030009660 4030007130 4030008630 4030008680 4030006900 4030006900 4510007310 4030006860 4030006860 4030011600 4030008920 4030007160 4030007160 4030011600 4030008630 4550006150 4550006170 4550006360 4030006850 S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S HESISTOH S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TRIMMER S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CER
24. J3GEVJ 101 V 100 Q ERJ3GEVJ 470 V 47 Q ERJ3GEYJ 330 V 33 0 ERJ3GEVJ 105 V 1 ERJ3GEVJ 105 V 1 ERJ3GEYJ 222 V 2 2 kQ ERJ3GEVJ 101 V 100 Q ERJ3GEYJ 824 V 820 ERJ3GEYJ 104 V 100 ERJ3GEYJ 223 V 22 ERJ3GEVJ 103 V 10 ERJ3GEVJ 100 V 10 Q ERJ3GEYJ 332 V 3 3 ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 152 V 1 5 ERJ3GEYJ 152 V 1 5 ERJ3GEYJ 152 V 1 5 ERJ3GEYJ 104 V 100 ERJ3GEVJ 471 V 470 MAIN UNIT 7030007590 7030003840 7030003520 7030003560 7030003520 7030003450 7030003680 7030003400 7030003560 7030003560 7030003460 7030003390 7030003740 7030003640 7030003460 7030003610 7030003650 7030003480 7030003730 7030003200 7030003420 7030003660 7030003420 7030003660 7030003390 7030003630 7030003440 7030003440 7030003640 7030003560 7030003500 7030003480 7030003380 7030003320 7030003300 7030003320 7030003380 7030003360 7030003480 7030003520 7030003520 7030003320 7030003200 7030003440 7030003320 7030003440 7030000960 7030000960 7030003480 7030003500 7030003560 7030003360 7030003560 7310002670 7030003610 7030003480 7030003480 7030003680 7030003400 7030000240 7030000240 7030003320 7030003490 7030003490 7030003740 7030003560 7030003540 7030003560 7030003520 7030003670 7030003670 7030003670 7030003320 7030003620 7030003610 7510000750 7030003550 7310002770 7030003560 7030003820 7030003680 7030003760 S RESISTOR
25. MIXER AND 1ST IF CIRCUITS The 1st mixer circuit converts the received signal to a fixed frequency of the 1st IF signal with a 1st LO VCO output fre quency By changing the 1st LO frequency only the desired frequency will be passed through a pair of crystal filters at the next stage of the mixer The signals from the RF circuit are mixed with the VCO sig nals at the 1st mixer circuit Q2 to produce a 21 7 MHz 1st IF signal The 1st IF signal is applied to a pair of crystal filters FI1 and to suppress out of band signals and is then amplified at the IF amplifier Q3 The amplified signal is applied to the 2nd mixer circuit IC2 pin 16 e 2nd IF AND DEMODULATOR CIRCUITS 3 1 4 2ND IF AND DEMODULATOR CIRCUITS The 2nd mixer circuit converts the 1st IF signal to a 2nd IF signal A double superheterodyne system which converts receive signals twice improves the image rejection ratio and obtains stable receiver gain The FM IF IC IC2 contains the 2nd local oscillator 2nd mixer limiter amplifier quadrature detector and noise detector circuits etc The 1st IF signal from Q3 is applied to the 2nd mixer section of IC1 pin 16 and is mixed with a 25 25 MHz 2nd LO sig nal generated at the PLL circuit IC3 pin 17 to produce 450 kHz 2nd IF signal The 2nd IF signal from 2 3 is passed through the ceramic filter FI2 where unwanted signals are sup pressed and is then applied to the 2nd IF and limit
26. Measuring range 1 50 W Frequency range 0 1 300 MHz HF power meter Frequency range 100 300 MHz Output level 0 1 uv 32 mV terminated type Impedance 50 Q 127 to 17 dBm SWHR Less than 1 2 1 Standard signal generator SSG Frequency range DC 20 MHz Frequency range 0 1 300 MHz Measuring range 0 01 20 V Freguency counter Frequency accuracy 1 ppm or better Sensitivity 100 mV r better AC millivoltmeter Measuring range 10 mV 10 V Input impedance 40 Frequency range 30 300 MHz External speaker Measuring range 0 to 10 kHz Capacity 9 W or more Att t Power attenuation 50 or 60 dB DC voltmeter Input impedance 50 DC or better enuator Capacity AM Gf more Oscilloscope CONNECTIONS Standard signal CAUTION JS pu DO NOT transmit while SSG is connected to the antenna connector 32 mV to 0 13 uV RF power meter DC power supply 50 O 1 50 W 13 8 V 15A FM deviation meter Attenuator 50 dB or 60 dB to the antenna connector 4 2 ADJUSTMENTS ADJUSTMENT LOCK VOLTAGE Receiving ADJUSTMENT CONDITION Operating channel ch16 REFERENCE 1 Operating channel ch16 FREQUENCY Output power Low Rear Loosely couple the 156 800000 MHz Panel frequency counter Connect an RF power meter or a to the antenna con 50 dummy load to the antenna nector connector Transmitting
27. O SERVICE MANUAL VHF MARINE TRANSCEIVER IC M415A Icom Inc INTRODUCTION This service manual describes the latest service information for the IC M45A VHF MARINE TRANSCEIVER at the time of publication 2 versions of the IC M45A have been designed This service manual covers each version MODEL VERSION SYNBOL BLACK USA 1 WHITE IC M45A DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V This will ruin the transceiver DO NOT expose the transceiver to rain snow or any liquids DO NOT reverse the polarities of the power supply when connecting the transceiver DO NOT apply an RF signal of more than 20 dBm 100mW to the antenna connector This could damage the trans ceiver s front end ORDERING PARTS Be sure to include the following four points when ordering replacement parts 1 10 digit order numbers 2 Component part number and name 3 Equipment model name and unit name 4 Quantity required lt SAMPLE ORDER gt 1110003490 516 TA31136FN IC M45A MAIN UNIT 5 pieces 8810008660 Screw BO M3x8 NI IC M45A Chassis 10 pieces Addresses are provided on the inside back cover for your convenience REPAIR NOTES 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transceiver until the transceiver is dis connected from its power source 3 DO NOT force any of the variable components T
28. S S ELECTROLYTIC 50 CV 2R2 BS S CERAMIC C1608 JB 1C 473K T A ELECTROLYTIC 16 MV 470 HC S Surface mount MAIN UNIT ORDER E E mm 4030011600 4510004590 4030006860 4030008630 4510007290 4030006900 4030008630 4030008630 4030006900 4510007310 4030008630 4030006900 4030008630 4030006900 4030012600 4030006860 4550006130 4550006150 4030008630 4030006860 4030006860 4030008630 4030006860 4030006860 4030008890 4030008890 4030011600 4030006970 4030007030 S CERAMIC C1608 JB 1C 104KT N ELECTROLYTIC 16 MV 470 HC S CERAMIC S CERAMIC C1608 JB 1H 102K T A C1608 JF 1C 104Z T A S ELECTROLYTIC 6 CV 100 BS S CERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROLYTIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S TANTALUM S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC C1608 JB 1E 103K T A C1608 JF 1C 104Z T A C1608 1C 104Z T A C1608 JB 1E 103K T A 16 CV 10 BS C1608 JF 1C 104Z T A C1608 JB 1E 103K T A C1608 JF 1C 104Z T A C1608 JB 1E 103K T A C2012 JB 1A 105M T A C1608 JB 1H 102K T A ECST1VY224R ECST1CY105R C1608 JF 1C 104Z T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JF 1C 104Z T A C1608 JB 1H 102K T A C1608 JB 1H 102K T A C1608 JB 1C 273K T A C1608 JB 1C 273K T A C1608 JB 1C 104KT N C1608 CH 1H 060D T A C1608 CH 1H 150J T A 6510019420 S CONNECTOR B8B ZR SM3 TF 65100034
29. T the power detector circuit Main unit D13 D14 SQLV Input port for the squelch volume level Input port for the smart mic functions 2 02 V UP is pushed 47 KEYM 3 00 v DN is pushed 3 84 V HI LO is pushed 49 50 LAMP2 Outputs LCD backlight control signal LAMP1 High While LCD backlight is ON Output port fo RF output power High or Low select signal Low While low power is selected 53 Outputs beep audio signals Input port for the data signals from the EEPROM IC2 pin 1 Input port from the FM IF IC MAIN unit 2 13 for the squelch oper ation Low While signal receiving Outputs strobe signals for the PLL cir Outputs data signals to the EEPROM IC2 pin 5 PLL and IC MAIN unit Outputs clock signal to the EEPROM ce pin V and PLL IC MAIN unit papa transmit mute signal E aa Low While transmitting Outputs the analog switch MAIN unit RMUT 024 control signal Low While squelched Outputs the T5 regulator MAIN unit SEND 019 020 control signal Low While transmitting Outputs the R5 regulator MAIN unit 76 RCV 021 022 control signal Low While receiving SECTION 4 ADJUSTMENT PROCEDURES 4 1 PREPARATION REGUIRED TEST EGUIPMENT EGUIPMENT GRADE AND RANGE EGUIPMENT GRADE AND RANGE Output voltage 13 8 V DC Frequency range 300 3000 Hz Dow r Sippy Current capacity 10 A or more AO generator Measuring range 1 500 mV
30. TE85R 1590000420 S TRANSISTOR RN1404 TE85R 1520000460 S TRANSISTOR 2SB1132 T100 R 1590000420 S TRANSISTOR RN1404 TE85R 4 NIK 2 NJ 6510021720 30FLT SM1 TB 6510018960 S CONNECTOR 2 oo foy oi so 5030001770 LCD LM 1798B 5080000440 LAMP BQO31 30118 5080000440 LAMP BQO31 30118 O 0 p Q Q 0 p 0 Q Q S 9 s Q IM S Surface mount MAIN UNIT ORDER ORDER NIU TE R omoes 1520000460 S TRANSISTOR 2581132 T100 R S TRANSISTOR 2SC2712 Y TE85RTEM 1530000160 1590001390 1530000160 1710001080 1720000370 1720000370 1720000370 1750000470 1790000540 1790000540 1790000620 1750000060 1790000450 1750000060 1790000690 1790000690 1750000130 1790000700 1710001080 1790000620 1720000370 2010002420 2020001680 2010002420 6070000210 6050010800 6110001670 6110001600 6110001600 6200002370 6200008260 6200008260 6200002600 6200002600 6200003050 6200001980 6200001980 6130002360 6200001980 6200001980 6200001980 6200004700 6200004700 6200004700 6200002430 6200002430 6110001600 6170000230 7030003800 7030003630 7030003640 7030003680 7030003320 7030003280 7030003260 7030003800 7030003800 7030003480 7030003320 7030003790 7030003680 7030003600 7030003560 7030003200 7030003500 7030003480 7030003460 7030003460 7
31. TOR ERJ3GEYJ 272 V 2 7 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 4030006860 S CERAMIC C1608 JB 1H 102K T A 4030006860 S CERAMIC C1608 JB 1H 102K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4510007280 S ELECTROLYTIC 50 CV 2R2 BS 4030008890 S CERAMIC C1608 JB 1C 273K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4030006900 S CERAMIC C1608 JB 1E 103K T A 4510007280 S ELECTROLYTIC 50 CV 2R2 BS 4030006900 S CERAMIC C1608 JB 1E 103K T A 1580000540 S FET 3SK131 T2 LA 1580000540 S FET 3SK131 T2 LA 1530002360 S TRANSISTOR 2SC2714 Y TE85R 1520000460 S TRANSISTOR 2SB1132 T100 R 1590001190 S TRANSISTOR XP6501 TX AB 1540000550 S TRANSISTOR 2501664 T100Q 1560000270 S FET 25 302 TE85R 1530002600 S TRANSISTOR 25 4215 TE85R 1530002600 S TRANSISTOR 2SC4215 O TE85R 1530002600 S TRANSISTOR 2SC4215 O TE85R 1530002240 S TRANSISTOR 2SC3775 3 TB 1530003710 S TRANSISTOR 2SC3268 TE12L 1560000540 S FET 25 880 TE85R 1590000420 S TRANSISTOR RN1404 TE85R 1590000420 S TRANSISTOR RN1404 TE85R 1520000380 TRANSISTOR 2SB1143 S 1590000670 S TRANSISTOR FMW1 T148 1590000460 S TRANSISTOR RN1402
32. e divider The PLL circuit using a one chip PLL IC IC3 directly gen erates the transmit frequency and receive 1st IF frequency with VCOs The PLL sets the divided ratio based on serial data from the CPU on the LOGIC unit and compares the phases of VCO signals with the reference oscillator fre quency The PLL IC detects the out of step phase and out put from pin 13 The reference frequency 21 25 MHz is oscillated at X2 3 3 2 TX AND RX LOOP The generated signal at the VCO C70 C74 L12 D6 D7 Q7 enters the PLL IC IC3 pin 19 and is divided at the pro grammable divider section and is then applied to the phase detector section The phase detector compares the input signal with a refer ence frequency and then outputs the out of phase signal pulse type signal from pin 13 The pulse type signal is converted into DC voltage lock voltage at the loop filter C67 C79 R55 R56 and then applied to variable capacity diodes D6 D7 of the VCO to stabilize the oscillated frequency The lock voltage is also used for the receiver circuit for the bandpass filter center fre quency The lock voltage from the loop filter is amplified at the buffer amplifier Q8 Q10 and then applied to the RF cir Cuit e PLL circuit Loop R55 R56 filter C67 C79 21 25 MHz signal to the FM IF IC 2 pin 2 X1 21 25 MHz Buffer Programmable counter 3 3 3 CIRCUIT The outputs from
33. e AF signals the squelch circuit switches the AF mute switch A portion of the AF signals from the FM IF IC IC2 pin 9 pass through the SQUELCH control pot VR B unit R1 via the signal and are then applied to the active filter section IC2 pin 8 The active filter section amplifies and fil ters noise components The filtered signals are applied to the noise detector section and output from pin 13 as the SQL signal The SQL signal is applied to the CPU LOGIC unit IC1 pin 57 The CPU analyzes the noise con ditton and outputs the RMUT signal to an AF mute switch Q24 3 1 7 WEATHER ALERT DECODER CIRCUIT USA version only When the weather alert function is activated and a 1050 Hz alert tone from NOAA weather radio broadcast is received the IC M45A emits beep tones and indicates flash ing ALT on the display to inform of an emergency weather report on the air AF signals from the FM IF IC IC2 pin 9 are applied to the tone decoder IC1 3 When 1050 Hz signal is detect ed the tone decoder outputs a low level signal from pin 8 and the output signals are applied to the CPU LOGIC unit IC1 pin 41 to control beep tones and the ALT indicator 3 2 TRANSMITTER CIRCUITS 3 2 1 MICROPHONE AMPLIFIER CIRCUIT The microphone amplifier circuit amplifies audio signals with 6 dB octave pre emphasis from the microphone to a level needed at the modulation circuit The AF signals from the micro
34. er ampli fiers in IC2 pin 5 The signal is applied to the FM detector section in IC2 for demodulation into AF signals The FM detector circuit employs a quadrature detection method linear phase detection which uses a ceramic dis criminator X1 for phase delay to obtain a non adjusting cir cuit The detected signal from IC2 pin 9 is applied to the AF circuit 3 1 5 AF AMPLIFIER CIRCUIT The AF amplifier circuit amplifies the detected signals to drive a speaker The AF circuit includes an AF mute circuit for the squelch AF signals from IC2 pin 9 are applied to the de emphasis circuit R116 C182 The de emphasis circuit is an integrat ed circuit with frequency characteristic of 6 dB octave and then the integrated signals are applied to the AF amplifier Q23 The amplified signals are passed through the VOLUME control VR A unit R1 and are then applied to the AF power amplifier IC7 pin 1 via the analog switch Q24 The output signal from IC7 pin 4 drives the internal external speaker 2nd IF filter 450 kH 21 25 MHz 17 level 2 adjustment pot R1 VR B unit drei O co X2 21 25 MHz 5 70 Ti T5 2 1136 signal DET 52 LA ist IF 21 7 MHz from 555 R30 EJ X1 SQL signal to the CPU OR5 LOGIC unit IC1 pin 57 R36 3 1 6 SGUELCH CIRCUIT A squelch circuit cuts out AF signals when no RF signals are received By detecting noise components in th
35. nd 20 C to 60 4 F to 140 F 10 ppm 20 C to 60 4 F to 140 F at 25 W 6 0A Heceive max audio 1 2A 50 nominal 152 W x67 H x144 D mm 6 W x2 8 H x523 D in 900 g 2 Ib High 25 W Low 1W Variable reactance frequency modulation 45 0 kHz 70 dB 60 dB 40 dB Less than 10 at 70 deviation 1 dB to 3 dB of 6 dB octave from 300 Hz to 3000 Hz Double conversion superheterodyne system Ist 21 7 MHz 2nd 450 kHz 0 32 uV typical at 12 dB SINAD 0 32 UV typical 70 dB typical 70 dB typical 70 dB typical 40 dB 4 0 W typical at 10 distortion with an 4 O load 2 dB to 8 dB of 6 dB octave from 300 Hz to 3000 Hz All stated specifications are subject to change without notice or obligation H VHF MARINE CHANNEL LIST INT CAN Transmit Receive USA INT Transmit Receive USA INT Transmit Receive 156 050 22 157 100 161700 74 74 156 725 156 725_ 03 160 750 2 157 150 161 750 18 156 925 161525_ 156 150 zsa 157 150 157 150 zea 156 925 156 925 160 850 26 26 157300 161 900 157025 161 625 156 250 156 25 161 950 80A 80 157 025 157 025 156 30 162 000 81 157 075 161 675 160 950 60 60 156 025 160 625 81A 81 157 075 157 075 oval 156 350 186350 e1 156075 160 675 187 125 161 725 156450
36. phone are amplified at the microphone amplifier IC5 A capacitor C138 and resistor R89 are connected to the microphone amplifier IC5 to obtain the pre emphasis characteristics The amplified signals are passed through the splatter filter IC5 to suppress unwanted 3 kHz or higher signals fil tered signals are then applied to the modulation circuit e APC circuit HF signal x amp IC4 TMUT 27 3 D IA 2222 Q14 3 2 2 MODULATION CIRCUIT The modulation circuit modulates the VCO oscillating signal RF signal using the microphone audio signals Audio signals from the splatter filter IC5 pass through the frequency deviation adjustment pot R106 and are then applied to the modulation circuit to modulate the oscillated signal at the VCO Q7 3 2 3 DRIVE AMPLIFIER CIRCUIT The drive amplifier circuit amplifies the VCO oscillating sig nal to a level needed at the power amplifier The VCO output is buffer amplified by Q8 and Q10 and is then applied to the T R switch D11 The transmit signal from the T R switch is amplified to the pre drive Q11 and drive Q12 amplifiers to obtain an approximate 300 mW sig nal level The amplified signal is then applied to the RF power amplifier IC4 pin 1 3 2 4 POWER AMPLIFIER CIRCUIT The power amplifier circuit amplifies the driver signal to an output power level IC4 is a power module which has amplification output capa bilitie
37. rews A D Unsolder DC cable 2 points and antenna connector Note When replacing the screw 10 12 kg of torque MUST 8 points as shown below be applied to ensure water resistance 2 Unscrew 2 screws O and 7 screws D to remove the MAIN unit SECTION 3 CIRCUIT DESCRIPTION 3 1 RECEIVER CIRCUITS 3 1 1 ANTENNA SWITCHING CIRCUIT The antenna switching circuit functions as a low pass filter while receiving and as resonator circuit while transmitting The circuit does not allow transmit signals to enter receiver circuits Received signals enter the MAIN unit from the antenna con nector and pass through the low pass filter L1 L2 C1 C3 The signals are then applied to the RF circuit via the anten na switching circuit C7 C8 D1 D19 L3 3 1 2 RF CIRCUIT The RF circuit amplifies signals within the range of frequen cy coverage and filters out of band signals The signals from the antenna switching circuit pass through a tunable bandpass filter C10 C12 C13 D2 L4 where the object signals are led to the RF amplifier circuit Q1 The amplified signals at Q1 are applied to the 2 stage tun able bandpass filter C20 C22 C24 C26 D3 04 L5 L6 to suppress unwanted signals and improve the selectivity The signals are then applied to the 1st mixer circuit D2 D4 employ varactor diodes that are controlled by the PLL lock voltage to track the band pass filters 3 1 3 1ST
38. s of about 35 W The output from IC4 pin 4 is passed through the antenna switching circuit D19 and is then applied to the antenna connector via the low pass filter C1 C3 C5 C6 L1 L2 3 2 5 APC CIRCUIT The APC circuit stabilizes transmit output power The HF output signal from the power amplifier IC4 pin 4 is detected at the power detector circuit D13 D14 L21 and is then applied to one of the differential amplifier inputs Q17 pin 5 via the High Low control circuit Q18 R79 The applied voltage controls the differential amplifier output Q17 pin 2 and the bias voltage control Q16 Thus the APC circuit maintains a constant output power The reflected power from the antenna connector is detected at D14 and is then applied to the CPU LOGIC unit IC1 pin 45 The detected voltage increases when the antenna is mismatched causing the output power to be switched from High to Low to protect the power module IC4 TA ma to antenna RF detector Circuit TXDET signal R83 to the CPU HI LO 3 3 PLL CIRCUITS 3 3 1 GENERAL The PLL circuit provides stable oscillation of the transmit fre guency and receive 1st LO freguency The PLL circuit com pares the phase of the divided VCO frequency to the refer ence freguency The PLL output freguency is controlled by a crystal oscillator and the divided ratio of the programmabl
39. urn them slowly and smoothly 4 DO NOT short any circuits or electronic parts An insulat ed turning tool MUST be used for all adjustments 5 DO NOT keep power ON for a long time when the trans ceiver is defective 6 DO NOT transmit power into a signal generator or a sweep generator 7 ALWAYS connect a 40 dB to 50 dB attenuator between the transceiver and a deviation meter or spectrum ana lyzer when using such test equipment 8 READ the instructions of test equipment thoroughly before connecting equipment to the transceiver SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION 1 PECIFICATIONS WHF MARINE CHANNEL LIST 2 ISASSEMBLY INSTRUCTIONS 3 CIRCUIT DESCRIPTIO 3 1 RECEIVER CIRCUITS 3 2 TRANSMITTER CIRCUITS 3 3 PLLCIRCUITS 3 4 POWER SUPPLY CIRCUITS 3 5 PORTALLOCATIONS 4 JADJUSTMENT PROCEDURES 41 PREPARATION 4 2 PLLADJUSTMENTS 4 3 ITRANSMITTERADJUSTMENTS 44 RECEIVER 5 PARTS LIS 6 MECHANICAL PARTS AND DISASSEMBL 61 CABINET 65

IC-M45A Service Manual

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