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IC-M302 Service manual - R

1. 9 5 7 32 SECTION 8 TRANSISTOR AND FET S 2SA1577 Q Symbol HP 3SK131 L Symbol V12 FMW1 Symbol W1 1SS321 Symbol F9 2SB1132 R Symbol BARB DTA144EU Symbol 16 155355 Symbol A d ae gt HSM88ASR Symbol C3 2SC4116 BL Symbol LL B E DTC114EU Symbol 14 B 1SV214 Symbol 1 pink X HVC350B Symbol BO SEMI CONDUCTOR INFORMATION 2SC4215 O Symbol QO B E DTC114 TU Symbol 04 B 1SV307 Symbol MA77 Symbol 4B 2SC4226 R25 Symbol R25 DTC144EU Symbol 26 DA204 K Symbol XB15A308 Symbol T8 SECTION9 BOARD LAYOUTS 9 1 MAIN UNIT e TOP VIEW B 601 5C MP3 X1 JI FI F12 C OC C46 lol zm e lco S R42 C65 CO C73 C74 R MIC m Fg me 8 08 Po Jo gt B 91H 09 098 E HE em mx egm E ND 869 8 082 659 994 Leu O 8 rd a BE 619 29 8020 lt a7 235 E E L o gt gt N e 0255 C306 B 5 IRR E Q 63 2 R211 5 on S lt gt S gt jay EJ IRI IS l
2. 4030006860 4510005310 4010008050 4030006860 4030006860 4010005430 4030006860 4030006860 4030006900 4030006860 4030006850 4030006860 4030006860 4030006850 4030006900 4030006860 4030007130 4030006850 4030007050 4030007130 4030006850 4030006860 4030006850 4030006860 4030006860 4510004590 4030011600 4510004590 4030011600 4030006900 4030017490 4030006860 4030011810 4030006860 4030006900 4030006870 4030007110 4030011600 4510004630 4030011600 4510004630 4030011600 4030009580 4030010770 4030007130 4030008470 4030006850 4030009920 4030006860 4030007050 4030007050 4030007050 4030006860 4550006540 4030011600 4030006900 4030006860 4550000510 4550002980 4030006900 4610001590 4030007020 4030007040 4510004630 4030011600 4510004630 4030011600 4030006860 4510004630 4030006850 4030006860 4510004630 4030006850 4030006850 4030006850 4030006860 4030007090 4030006850 4030006850 4030006860 4030007090 4030007090 4030006850 4030006850 4030006860 4030006860 4030006860 4030007090 S CERAMIC S ELECTROLYTIC ECEV1CA220SR CERAMIC S CERAMIC S CERAMIC 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 ELECTROLYTIC S CERAMIC S ELECTROLYTIC 16 MV 470 HC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S C
3. 50 0 471 T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T S Surface mount MAIN UNIT ORDER E R mm a 7030003680 7310002670 7030003590 7030003320 7030003560 7030003360 7030003560 7030003500 7030003510 7510001710 7030003520 7030003320 7030000100 7030003580 7030003450 7030003800 7030003600 7030003560 7030003800 7030003800 7030003800 7030003680 7030003490 7030003680 7030003480 7030003720 7030003560 7030003680 7030003560 7030003800 7030003520 7030003600 7030003680 7030003590 7030003660 7030003660 7030003660 7030003610 7510001670 7030003520 7030003600 7310002600 7030003610 7030003280 7030003550 7030003570 7030003570 7030003400 7030003660 7030003320 7030003860 7030003280 7030003440 7030003200 7030003480 7030003380 7030003380 7030003500 7030003560 7030003480 7030003560 7030003480 7030003510 7030003520 4010007630 4010005420 4010008050 4010005790 4010007630 4010008070 4030006990 4030007010 4030007010 4030009920 4030006860 4030011600 4030006900 4030006860 4030011600 4030009530 4030007010 4030006860 4030009530 4030009520 4030007010 4030011600 S RESISTOR S TRIMMER S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S THEMI
4. ERJ3GEYJ 104 V 1 ERJ3GEYJ 398 V 39 ERJ3GEYJ 153 V 1 ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 102 V 1 ERJ3GEYJ 102 V 1 ERJ3GEYJ 561 V 560 Q ERJ3GEYJ 473 V 47 kQ ERJ3GEYJ 221 220 Q ERJ3GEYJ 101 V 1 ERJ3GEYJ 333 33 ERJ3GEYJ 223 V 22 kQ ERJ3GEYJ 104 V 1 ERJ3GEYJ 101 V 1 ERJ3GEYJ 391 V 390 Q ERJ3GEYJ 822 V 8 2 kQ ERJ3GEYJ 822 V 8 2 kQ ERJ3GEYJ 681 V 680 ERJ3GEYJ 683 V 68 ERJ3GEYJ 101 V 1 ERJ3GEYJ 333 V 33 kQ ERJ3GEYJ 102 V 1 ERJ3GEYJ 390 V 39 Q ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 391 V 390 Q ERJ3GEYJ 100 V 1 ERJ3GEYJ 103 V 1 ERJ3GEYJ 103 V 1 ERJ3GEYJ 470 V 47 ERJ3GEYJ 102 V 1 ERJ3GEYJ 101 V 1 ERJ3GEYJ 100 V 1 ERJ3GEYJ 102 V 1 ERJ3GEYJ 181 V 1 ERJ3GEYJ 151 V 1 ERJ3GEYJ 224 V 220 MCR10EZHJ 470 Q MCR50JZHJ 68 680 MCR10EZHJ 2 2 MCR10EZHJ 2 2 ERJ3GEYJ 682 V 6 8 00 kQ 00 kQ 00 kQ 00 kQ 00 Q 5 MQ 0 09 2 2 00 5 0 5 5 00 0 0 0 0 5 5 50 00 5 00 Q 00 00 0 80 Q 00 Q kQ 09 0 0 00 0 0 0
5. o 55 mio C22 gt amp 5 Y NN o D C241 SS O S 8 C124 R212 o N UT aS S 6135 O ES RS 3 Risa 5 S C128 Ros E uos Pag Hest 168 aN 2 R181 C83 93 8 pg 6127 o c P R182 B 6 106 1001 gt i a 4 8 88 R S B S 1 RES R65 ci C Oj N C198 55 C85 L T C115 LOGIC 2 BI o Rgs z wa 8215 259 5 NG g Z E E an a o sp C119 _ C305 C96 TFT uf 105 R83 IBD i 99 N S 29 62 B EZ gt 6619 1013 FE 019 5 4 JJ E 2012 829 Col O g n R184 REF DEV 6100 Q 0 1 5 9800 bly 62 co D R C rN E J 91 E q sa h 019 HO 4 m Bla SE a M 00 70 2 O gt LO I NS LA 7600 0709 3 PWR gia El NG E 5 T L d C140 O R58 R143 ud 0800 L 7004 LOLO 2600 9600 9 6004 E 7 6020 2020 4 Je celyd J 21 22 9219 2714 8014 ER 0714 e 5 py C 7214 7910 E 2919 Jr c LU 7 20 80
6. NEN gt TX line C RX ENG MES p Lm CP4 O AD qe NOL 5 CP5 R152 4 7 C207 0 001 Voltage line CP3 Q Q N OQ gt Q N to the antenna connector J2 B5B PH K S W1 OPC 1264 J2 B4B ZR SM3 TF 11 3 LOGIC UNIT DS6 FY1101 TR FY1101 TR DS7 R31 390 DS4 P FY1101 TR FY1101 TR DS5 R30 390 DS2 DS3 5 SML 311YT SML 311YT R29 1k R35 220 DIM MAX 12 4V C14 00 Q2 2SB1132 5V IC2 p o gu R21 27 Q6 DTC114TU R38 1K IC5 BD5242FVE TR 5 VOUT VDD SUB CT GND 5 5V 5 6k 2 80V SEG27 3 5V 01 C5 0 INI TO LOI St co eu JOIN O oojoo NINININ P67 AN7 P66 AN6 P65 AN5 P64 AN4 P63 SCLK22 AN3 P62 SCLK21 AN2 P61 SOUT2 AN1 P60 SIN2 ANO P57 ADT DA2 P56 DA1 P55 CNTR1 P54 CNTRO IC1 PSS RTP1 M37560MFA 303GP P52 RTPO P51 PWM1 P50 PWMO P47 SRDY1 P46 SCLK1 P45 TXD P44 RXD P43 TOUR P42 INT2 P41 INT1 P40 P77 P76 P75 P74 P73 P72 P71 P70 INTO RESET XCIN XCOUT XIN XOUT VSS P27 P26 P25 P24 P23 P22 P21 P20 P17 P16 P15 SEG39 P14 SEG38 R64 10 k X1 CR 769 7 9872 MHz 3 95 SCAN CHWX CH16 DN P30 SEG18 P31 SEG19 P32
7. MAIN UNIT ORDER emem 7010007590 RESISTOR RD1 4S 123JTA 7010007600 RESISTOR RD1 4 682JTA lt FG gt 7010007610 RESISTOR RD1 4 153JTA lt FG gt 7010007620 RESISTOR RD1 4 333JTA lt FG gt 4030018660 S CERAMIC C1608 JB 1H 223K T lt FG gt 4030018670 S CERAMIC C1608 CH 1H 471J lt FG gt 7700002640 MICROPHONE KUC3523 040245 lt FG gt 2260002780 SWITCH SKHHLPA010 lt FG gt 2260002790 SWITCH SKHHAMA010 lt FG gt 2260002790 SWITCH SKHHAMA010 lt FG gt 2260002790 SWITCH SKHHAMA010 lt FG gt 9027150010 WIRE 71 98 010 98 98 lt FG gt 9027150010 WIRE 71 98 010 98 98 lt FG gt 9027150020 WIRE 24 00 020 W01 W01 lt FG gt 9027150030 WIRE 24 04 020 W01 W01 lt FG gt 0910056860 PCB B 6067 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount 6 5 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY CHASSIS PARTS ORDER NO DESCRIPTION 6510004880 Connector MR DSE 01 BOARD REF ORDER DESCRIPTION 5030002590 LCD IS08251E00V0 8930061040 LCD contact SRCN 2685 SP N W 8900012330 Cable OPC 1258 8210019840 2685 Reflector 8930060510 2685 LCD holder 8930061420 2685 LCD filter SQL BOARD REF NO ORDER DESCRIPTION 7210003150 TP96N97 15SK 10KB 2685 VR UNIT REF NO ORDER DESCRIPTION 8010019300 2685 Chassis 8930061050 2685 R Bush plat
8. e SERVICE MANUAL VHF MARINE TRANSCEIVER IC M302 Icom Inc INTRODUCTION This service manual describes the latest service information for the IC M302 VHF MARINE TRANSCEIVER at the time of publication IC M302 upgrade quality all electrical or mechanical parts internal circuits are subject to change without notice or oblig ation DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V Such a connection could cause a fire or electric hazard DO NOT expose the transceiver to rain snow or any liquids DO NOT reverse the polarities of the power supply when con necting 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 2510001240 Speaker 045P0803 IC M302 Front unit 5 pieces 8810004540 Screw M3x8 SUS 1C M302 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
9. 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 ERJ3GEYJ 104 V 1 ERJ3GEYJ 330 V 33 ERJ3GEYJ 104 V 1 ERJ3GEYJ 104 V 1 ERJ3GEYJ 104 V 1 ERJ3GEYJ 101 V 1 ERJ3GEYJ 155 V 1 ERJ3GEYJ 473 V 47 ERJ3GEYJ 223 V 22 ERJ3GEYJ 103 V 1 ERJ3GEYJ 100 V 1 ERJ3GEYJ 122 V 1 ERJ3GEYJ 122 V 1 ERJ3GEYJ 104 V 1 ERJ3GEYJ 152 V 1 ERJ3GEYJ 471 V 470 Q ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 683 V 68 ERJ3GEYJ 471 V 470 ERJ3GEYJ 102 V 1 ERJ3GEYJ 391 V 390 ERJ3GEYJ 103 V 1 ERJ3GEYJ 152 V 1 ERJ3GEYJ 102 V 1 ERJ3GEYJ 274 V 270 kQ ERJ3GEYJ 152 V 1 ERJ3GEYJ 104 V 1 ERJ3GEYJ 103 V 1 ERJ3GEYJ 103 1 ERJ3GEYJ 103 V 1 ERJ3GEYJ 103 V 1 ERJ3GEYJ 153 V 1 ERJ3GEYJ 153 1 ERJ3GEYJ 102 V 1 ERJ3GEYJ 474 V 470 kQ ERJ3GEYJ 154 V 1 ERJ3GEYJ 272 V 2 7 kQ ERJ3GEYJ 391 V 390 ERJSGE JPW V ERJ3GEYJ 470 V 47 Q ERJ3GEYJ 474 V 470 kQ ERJ3GEYJ 473 V 47 kQ
10. SENSITIVITY 1 Operating channel ch16 e Connect the dis Maximum voltage MAIN L6 e SQUELCH control tortion meter to the L7 Max counterclockwise EXT SP jack with L8 Connect an SSG to the antenna a 4 load L9 connector and set as Connect a DC volt Frequency 156 800 MHz meter to the check Level 1 uV point RSSI 107 dBm Modulation 1 kHz Deviation 3 0 kHz e Receiving This output level of a standard signal generator SSG is indicated as SSG s closed circuit Receiver sensitivity adjustment SECTION 6 PARTS LIST 6 1 IC M302 VR BOARD ORDER 7210003140 VARIABLE TP96N97N 15SK 10KA 2685 6510009490 CONNECTOR S5B ZR 0910056592 PCB 6017 SQL BOARD ORDER 7210003150 VARIABLE TP96N97 15SK 10KB 2685 6510009470 CONNECTOR S3B ZR 0910056602 PCB B 6018B FRONT UNIT ORDER 0800007150 MICROPHONE 141 FG Black 0800007160 MICROPHONE HM 141WACC FG While 0800007320 MICROPHONE 1416 FG Gray 2510001240 SPEAKER 045P0803 lt FG gt 7120000470 JUMPER 7120000470 JUMPER 8900012410 CABLE ERDS2TO ERDS2TO OPC 1263 N 30 L 110 LOGIC BOARD ORDER Lib 1140011800 S IC 1170000350 S IC 1130007430 S IC 1130011570 S IC 1110006210 S IC 1110002700 S IC M37560MFA 303GP FX 2685A PC357N6T TC7S14F
11. 9 4 2 5 APC CIRCUIT MAIN UNIT The APC circuit stabilizes transmit output power The RF output signal from the power amplifier IC4 is detected at the power detector circuit 021 022 131 and is then applied to one of the differential amplifier inputs Q21 pin 3 via the High Low control circuit Q22 R135 The applied voltage controls the differential amplifier output Q21 pin 1 and the bias voltage control Q23 Thus the APC circuit maintains a constant output power 4 3 PLL CIRCUITS 4 3 1 GENERAL MAIN UNIT The PLL circuit provides stable oscillation of the transmit fre quency and receive ist LO frequency The PLL circuit com pares the phase of the divided VCO frequency to the refer ence frequency The PLL output frequency is controlled by a crystal oscillator and the divided ratio of the programmable divider IC8 on the MAIN unit is a dual PLL IC which controls both VCO circuits for Tx and Rx and contains a prescaler pro grammable counter programmable divider phase detector charge pump etc The PLL circuit using one chip PLL IC MAIN unit 8 directly generates 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 BOARD and compares the phases of VCO signals with the reference oscillator frequency The PLL IC detects the out of step phase and output from pins 8 for Tx and Rx The reference frequency 21 25 MHz
12. BPLVL ex when receiving distress signal Low Whil ial alarm DSCDEC Input port for the DSC decode signal ow While sounds special alarm SEG1 23 UNLK Input port for the PLL unlock signal 88 SEG27 Output LCD segment signals Low While the PLL is unlocked 24 EDATA I O port for the EEPROM data signal 92 95 ae Output LCD common signals 0 5 Input port for the squelch level signal Input port for the HM 141 PTT switch Low While the switch 15 6 9 0 1 2 3 4 4 4 4 5 5 5 5 5 62 Input port for the SCAN switch Low While the SCAN switch is Input port for the CH WX switch Low While the CH WX switch is Input port for the CH16 switch Low While the CH16 switch is 43 DN Input port for the W switch Low While the W switch is pushed 44 UP Input port for the 4 switch Low While the 4 switch is pushed Input port for the DSC switch 45 DSC Low While the DSC switch is pushed SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT Output voltage 13 8 V DC Current capacity DC power supply RF power meter terminated type Measuring range 1 50 W Frequency range Impedance SWR 50 Q Frequency range Frequency counter Sensitivity 100 mV or FM deviation meter Frequency range Measuring range DC voltmeter Input impedance Distortion meter Frequency range Measuring
13. E o E NO 9918 5 Lo 9512 gcd PS 95 n co 17100 9910 C174 C171 2 u yg UN E J2 Wi to the LOGIC unit J1 to HM 141 to the VR SQL boards E MING VIVQd 2110 antenna connector 240250 SLAY 93QXM ON39SQ AG SAH 05 IAI 33 dS 919 69l e BOTTOM VIEW to the power supply Red cable Black cable 007 VCC2 VEG Gray cable JE SP UU othe externa Speaker SP EINE Blue cable 9 2 LOGIC UNIT e TOP VIEW R30 R25 R24 cO e N 8 N N 10416 lt ON C14 R1 8 c R4 5 R15 H R14 C26 04 5 CO N 9 3 B E x gt 8 1 Fa 00 R61 p R62 R43 8 8 B LO P moO BD L CC C21 R66 C43 o 8 er R29 6 J2 B 6096A R31 C41 C42 SP SP e BOTTOM VIEW U 3 95 Tadi 584 9 3 VR BOARD e TOP VIEW 5 J1 to the MAIN unit W1 e BOTTOM VIEW 9 4 SQL BOARD e TOP VIEW J1 to the MAIN unit W1 1 ISQLI 3 GND e BOTTOM VIEW 9 5 HM 141 e TOP VIEW MEL apf Pam an IA SECTION 10 BLOCK DIAGRAM 77777 1 SP1 0
14. SEG20 P33 SEG21 P34 SEG22 P35 SEG23 P36 SEG24 P37 SEG25 P00 SEG26 P01 SEG27 P02 SEG28 P03 SEG29 P04 SEG30 P05 SEG31 P06 SEG32 P07 SEG33 P10 SEG34 P11 SEG35 P12 SEG36 P13 SEG37 UP COMO DS1 IS08251E00V0 HVS SP 5 SQLC 11 3 BPLVL C S HVS HVS 25 3 24 BEEP J1 30FLT SM1 TB 11 4 VR SQL BOARD R1 VR BOARD R1 TP96N97N 15SK 10KA 2685 O 41 S5B ZR SQL BOARD J1 S3B ZR TP96N97 15SK 10KB 2685 11 4 11 5 HM 141 MC1 KUC3523 040245 W4 MIC 7 SKHHLPA010 W2 Oi O O PTT WI CHASSIS UNIT WI 00222 20000 0 id MICG 2d S2 3 SKHHLPAO10 i5 YD T 16 1 KEYM d 5 1 1 1 1 46 53 SKHHLPAO10 R3 io 1 15k 1 1 DOWN 4 1 UPON 2 0V 16 9 ON 3 8V S4 SKHHLPAO10 R4 rs 33k H L 49 11 5 Icom Inc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan Phone 81 06 6793 5302 Fax 81 06 6793 0013 URL http www icom co jp world index html Icom America Inc Corporate Headquarters 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 1 425 454 8155 Fax 1 425 454 1509 URL http Awww icomamerica com lt Customer Service gt Phone 1 425 454 7619 Canada Glenwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952
15. Spacer 2685 Shield plate Microphone HM 141B Black Microphone HM 141W White Microphone HM 141G Gray Speaker 045P0803 Cable OPC 1263 2685 Front Panel Black 2685 Front Panel A White 2685 Front Panel C Gray 2685 Key Board 2685 Window plate Knob N 312 Black Knob N 312 A White Knob N 312 B Gray SP net Screw PH M2 6x6 NI ZU BT 2345 Shaft 2685 Spring 2685 D cover 2685 Shaft angle 2685 F Bush plate O ring AC N BR DD NM HAH 8810004700 8810001490 8850000180 8850000500 8310050900 Screw PH A0 M3x16 SUS Screw PH AO M5x20 SUS Flat washer M5 SUS Spring washer M5 SUS 2438 warning sticker N N N N N Screw abbreviations BT Self tapping PH Pan head SUS Stainless NI ZU Nickel zinc BiH Bind head NI Nickel LOGIC BOARD MAIN UNIT F FRONT UNIT V VR BOARD CHASSIS PARTS L LOGIC BOARD yu E DOW z lt G 0 lt CENT 7 UNIT abbreviations 8900012211 8900012221 8900012501 8210020110 8210020130 8210020370 8210020120 8210020610 8210020380 8930060910 8930061150 8930060920 8930061160 8930061970 8930060940 8930061
16. T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T M Mounted side T Mounted on the Top side B Mounted on the Bottom side MAIN UNIT ORDER 4030009500 4030009520 4030007010 4030009530 4030009910 4030006850 4030006860 4030009520 4030006860 4030006860 4030007100 4030007010 4030006860 4030011600 4030006900 4030009920 4030006860 4030006900 4030008920 4030011600 4030006860 4030006860 4030007130 4510004630 4030006860 4030006900 4030011600 4030007170 4030007170 4030011600 4030011600 4030006860 4030006860 4030011600 4030009880 4030006850 4030006900 4030011600 4030011600 4030008880 4030008880 4510004630 4030011810 4510004630 4030011600 4030008920 4340000180 4030011600 4030006870 4030006900 4030011810 4510004630 4030006860 4550006130 4030006860 4030007090 4030007080 4030006850 4030006860 4030006850 4030006900 4030017490 4030006860 4030009540 4030006860 4030009540 4030009500 4030006860 4030006900 4030011770 4030006860 4030007050 4030006860 4030007090 4030006860 4030006860 4030007090 4030006860 4030007050 4030006860 4030009530 4030007090 4030006860 4030007050 4550006700 4030006860 4030006850 4030006850 S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S
17. Verify Receiving multi meter or oscil loscope to the check point LV Operating channel ch16 1 6 V Output power Low Transmitting REFERENCE 1 Operating channel ch16 Loosely couple the 156 8000 MHz MAIN C257 FREQUENCY Output power Low frequency counter Connect an RF power meter or a to the antenna con 50 dummy load to the antenna nector connector Transmitting o S 0 C36 Reference frequency adjustment sa SA W gt L3 00 CP1 PLL lock voltage MM check point me 5 3 TRANSMITTER ADJUSTMENTS MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE OUTPUT e Operating channel ch16 Rear Connect an RF 23 5 W MAIN R135 POWER e Output power High Panel power meter to the e Transmitting antenna connector FREQUENCY 1 e Operating channel ch16 Rear Connect an FM 4 3 kHz MAIN R184 DEVIATION e Output power Low Panel deviation meter to e Connect an audio generator to J2 the antenna con pin 3 on the MAIN unit with an nector through an AC millivoltmeter and set as attenuator Frequency 1 kHz Level 40 mV e Set an FM deviation meter as HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 e Transmitting Output power adjustment Frequency deviation adjustment 5 4 RECEIVER ADJUSTMENT MEASUREMENT k ADJUSTMENT ADJUSTMENT CONDITION
18. any of the variable components Turn 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 30 dB to 40 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 SECTION 4 1 4 2 4 3 4 4 4 5 4 6 4 7 9 1 5 2 5 3 5 4 6 1 6 2 7 1 7 2 9 1 9 2 9 3 9 4 9 9 10 11 11 1 11 2 11 3 11 4 11 5 TABLE OF CONTENTS SPECIFICATIONS INSIDE VIEWS DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPITON RECEIVER CIRCUITS i ia iiei ikiii ieaiai 4 1 TRANSMITER CIRCUITS 4 2 PEE CIRCUIT 4 2 SR 4 4 4 4 POWER 4 4 PORTALCOCATIONG PE EID ES 4 5 ADJUSTMENT PROCEDURES PREPARATION akanang kak qa 5 1 PEL ADJUSTMENTS uu al ER EE 5 2 TRANSMITTER ADJUSTMENTS 5 3 RECEIVER ADJUSTMENTS gace uu os si Bi a a BA as and ka vote 5 4 PARTS LIST
19. is oscillated at X2 MAIN unit 4 3 2 TX AND RX LOOP MAIN UNIT The generated signal at the VCO 013 014 011 014 enters the PLL IC IC8 pin 2 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 8 The pulse type signal is converted into DC voltage lock voltage at the loop filter R211 R213 C252 C254 and is then applied to varactor diodes D13 D14 of the VCO to stabilize the oscillated frequency CIRCUIT RF signal Q18 1 4 from PLL Power module YGR aA to the 5V RF detector 2 3 circuit OHV i OT5 i TXDET signal to the CPU TMUTE signal from the CPU GZ d R138 77 77 LOGIC board pin 2 LOGIC board 51 Q23 e Q21 a 8135 2m R133 Q20 au eS control circuit alee lt O H L qn R136 022 KO e PLL CIRCUIT Buffer sue pt to transmitter circuit VCO Buffer to 1st mixer circuit D16 7 21 25 MHz signal to the Programmable counter Buffer IC8 PLL IC Prescaler 3 Ue O nate Shift register lt POK divider IL15 X2 16 21 25 MHz EH 4 3 4 VCO
20. range 1 100 CONNECTIONS Standard signal generator 17 10 125 dBm 32 mV to 0 13 pV 10A or more 100 300 MHz 30 300 MHz 0 to 10 kHz 50 kO V DC or better Digital multi meter Input impedance 10 MQ V DC or better 1 kHz 10 96 GRADE AND RANGE 300 3000 Hz 1 500 mV 0 1 300 MHz 0 1 LV 32 mV 127 to 17 dBm Frequency range DC 20 MHz Measuring range 0 01 20 V AC millivoltmeter Measuring range 10 mV 10 V Input impedance 4Q i Capacity 5 W or more Attenuator 40 or 50 dB Dummy load Audio generator Frequency range Measuring range Standard signal generator SSG Frequency range Output level Less than 1 2 1 0 1 300 MHz Frequency accuracy 1 ppm or better Oscilloscope better Power attenuation Capacity 50 W or more 50 Q 100 W or more Hesistance Capacity CAUTION DO NOT transmit while the SSG is connected to the antenna connector RF power meter 50 O 1 50 W Frequency counter FM deviation meter Attenuator 40 dB or 50 dB to the antenna connector to DC cable DC power supply 13 8 V 10 Distortion meter SDeaker Red line Black line Red cap EXT SP jack DD 5 2 PLL ADJUSTMENTS MEASUREMENT ik ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST Operating channel ch16 MAIN Connect a digital 1 8 V
21. 0 156 20 157 200 78 156925 161 525 156 250 160 85 157 250 161 850 78A 78 156 925 156 925 156 250 156 250 25b Rx only 79 156975 161 575 156 300 156 30 157 300 161 900 79 156 350 160 95 157 350 161 950 07 156 350 156 350 28 28 28 157 400 162 000 80 80A 156 400 156 400 28b Rxonly 162 000 161 675 156 450 156 450 60 60 156 025 160 625 81 157 075 157 075 156 500 156 50 156 075 160 675 157 125 161 725 02 03 O1 05 On CO N N gt CO CO CO CO O1 gt 0 156 550 156 550 61A 61 156 075 156 075 82 2A 157 125 157 125 156 600 62 156 125 160 725 83 161 775 156 650 62 156 125 156 125 8 83A 157 175 157 175 156 700 63 156 175 160 775 83b Rxonly 161 775 156 750 63A 156 175 84 4 161 825 156 800 64 64 156 225 160 825 84 156 850 64A 64 156 225 160 825 8 161 500 65 156 275 160 875 85 156 90 65A 65A 65A 156 275 156 275 161 55 66 156 325 160 925 86 156 95 66 66A 66A 156 325 156 325 8 161 600 67 156 375 156 375 87 157 00 156 425 156 425 88 68 68 68 88 162 025 161 650 69 69 69 156 475 156 475 88 157 425 157 425 1 Low power only 2 Momentary high power 2 Receive only NOTE Simplex channels 3 21 23 61 64 81 82 and 83 CANNOT be la
22. 030003320 7030003820 7030003640 7030003600 7030003560 7030003200 7030003540 7030003450 7030003450 7030003680 7030003460 7030003400 7030003480 7030003660 7030003400 7030003440 7030003390 7030003560 7030003460 7510001510 7030003640 7030003440 7030003730 7030003460 7030003680 7030003560 7030003560 7030003560 7030003560 7030003580 7030003580 7030003440 7030003760 7030003700 7030003490 7030003390 7030003860 7030003280 7030003760 7030003640 7030003680 7030003630 7030003580 7030003480 7030003440 7030003440 7030003410 7030003640 7030003360 7030003320 7030003620 7030003600 7030003680 7030003320 7030003390 7030003550 7030003350 7030003550 7030003420 7030003660 7030003320 7030003620 7030003440 7030003270 7030003480 7030003390 7030003200 7030003560 7030003560 7030003280 7030003440 7030003320 7030003200 7030003440 7030003340 7030003720 7030000340 7030001110 7030000420 7030000420 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 THERMISTOR NTCG16 4LH 223KT ERJ3GEYJ 473 V 47 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
23. 12 14 to suppress unwanted 3 kHz or higher signals The filtered signals are then applied to the modulation circuit 4 2 2 MODULATION CIRCUIT MAIN UNIT The modulation circuit modulates the VCO oscillating signal RF signal using the microphone audio signals Audio signals from the splatter filter IC2D pass through the frequency deviation adjustment pot R184 and are then applied to the modulation circuit D11 D12 to change the reactance of D11 D14 and modulate the oscillated signal at the VCO Q13 Q14 4 2 3 DRIVE AMPLIFIER CIRCUIT MAIN UNIT 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 Q15 and Q16 and is then applied to the Tx Rx switch D16 D17 The transmit signal from the Tx Rx switch is amplified to the pre drive Q17 and YGR Q18 amplifiers to obtain an approximate 10 mW signal level The amplified signal is then applied to the RF power amplifier C4 4 2 4 POWER AMPLIFIER CIRCUIT MAIN UNIT The power amplifier circuit amplifies the driver signal to an output power level 104 is a power module which has amplification output capa bilities of about 25 W with 10 mW input The output from IC4 pin 4 is passed through the antenna switching circuit D1 and is then applied to the antenna connector via the low pass filter de emphasis s C89 The detected signal from zs RUE the FM IF IC IC1 pin
24. 1530002850 1710001080 1710001080 1720000260 1720000260 1720000260 1720000260 1750000470 1790000620 1790000620 1750000710 1750000710 1790000620 1790000620 1790000690 1790000690 1790000700 1750000150 2030000270 2030000270 2020001680 6070000200 6050011760 6110001600 6110001600 6110001600 6150003820 6150003820 6150003820 6150003820 6200010090 6200009620 6200009620 6200003710 6200008190 6200009560 6200009560 6200009680 6200009680 6110001670 6170000230 6200009560 6200009560 7030003680 7030003630 S FET S FET S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR S TRANSISTOR DIODE DIODE S VARICAP S VARICAP S VARICAP S VARICAP S DIODE S DIODE S DIODE S VARICAP S VARICAP S DIODE S DIODE S DIODE S DIODE DIODE S DIODE MONOLITH MONOLITH CERAMIC DISCRIMINATOR CDBLA450KCAY24 B0 CDB450C24 CR 768 21 250 MHz S XTAL COIL COIL COIL COIL COIL COIL COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL S COIL COIL COIL S COIL S COIL S RESISTOR S RESISTOR NJM2211M TE1 S AV35 1 LA4425A 3SK131 T2 LA 3SK131 T2 LA 2SC4215 O TE85R 2SC4116 BL TE85R 2SC4116 BL TE85R DTC144EUA T106 2SC4226 T1 R25 2SC4226 T1 R25 2SC421
25. 1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1H 681K T C1608 JB 1H 392K T C1608 CH 1H 101J T C1608 JB 1H 272K T C1608 JB 1H 471K T C1608 CH 1H 050B T C1608 JB 1H 102K T C1608 CH 1H 220J T C1608 CH 1H 220J T C1608 CH 1H 220J T C1608 JB 1H 102K T ECST1CY475R C1608 JB 1E 104K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 CH 1H 120J T C1608 CH 1H 180J T C1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 471K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 CH 1H 470J T C1608 JB 1H 471K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 CH 1H 470J T C1608 CH 1H 470J T C1608 JB 1H 471K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 CH 1H 470J T M Mounted side Mounted on the side Mounted on the Bottom side MAIN UNIT 6510021720 S CONNECTOR SOFLT SM1 TB 6510023810 CONNECTOR B5B PH K S 8900012400 7120000470 CABLE JUMPER OPC 1264 ERDS2TO 0910056573 B 6015C S Surface mount 6 2 HM 141
26. 3140GS e FRONT UNIT MAIN CPU 1 M37560MFA 303GP Reset IC IC5 BD5242FVE TR VR board System clock X1 CR 769 SDeaker EEPROM IC4 BR24L32FV W SQL board Photo coupler IC2 PC357N6T Dimmer controller Q2 2SB1132 Q3 Q4 2SC4116 BL Buffer amplifier LOGIC board Buffer amplifier 6 NJM2904M IC3 TC7S14FU SECTIONS DISASSEMBLY INSTRUCTIONS e REMOVING THE CASE e REMOVING THE MAIN UNIT 1 Unscrew 8 screws as shown below and then remove D Unsolder the external speaker cable F 2 points and the case in the direction of the arrow DC cable 2 points on the bottom side 2 Unsolder the antenna connector B 3 points 3 Remove a clip 4 Unscrew 2 screws D and 7 screws to remove the MAIN unit e REMOVING THE LOGIC BOARD Q Remove 2 cables D 2 Unsolder 2 points 3 Unscrew 4 screws 2 to remove the LOGIC BOARD SECTION 4 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 4 1 1 ANTENNA SWITCHING CIRCUIT MAIN UNIT 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 C3 C5 The signals are then applied to the RF circuit via the anten na switc
27. 4266 Fax 1 604 952 0090 URL http www icomcanada com Icom Australia Pty Ltd A B N 88 006 092 575 290 294 Albert Street Brunswick Victoria 3056 Australia Phone 61 03 9387 0666 Fax 61 03 9387 0022 URL http www icom net au Icom New Zealand 146A Harris Road East Tamaki Auckland New Zealand Phone 64 09 274 4062 URL http www icom co nz Fax 64 09 274 4708 Beijing Ltd 1305 Wanshang Plaza Shijingshan Road Beijing China Phone 86 010 6866 6337 Fax 86 010 6866 3553 URL http Awww bjicom com Icom Europe GmbH Communication Equipment Himmelgeister Str 100 D 40225 Dusseldorf Germany Phone 49 0211 346047 Fax 49 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 34 93 590 26 70 Fax 34 93 589 04 46 URL http www icomspain com Icom UK Ltd Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 44 01227 741741 Fax 44 01227 741742 URL http www icomuk co uk Icom France S a Zac de la Plaine 1 Rue Brindejonc des Moulinais BP 5804 31505 Toulouse Cedex France Phone 33 5 61 36 03 03 Fax 33 5 61 36 03 00 URL http www icom france com Asia Icom Inc 6F No 68 Sec 1 Cheng Teh Road Taipei Taiwan R O C Phone 886 02 2559 1899 Fax 886 02 2559 1874 URL http www asia icom com Count us
28. 45P0803 IN P A EX IRA ITP96N97N 1 SQL BOARD de R1 ITP96N97N 15SK 10KB 2685 LOGIC BOARD CLONE NMEA External GPS KEY BOARD DS1 IS08251E00V0 X1 CR 769 7 9872 MHz LCD 4 Q2 2SB1132 R Q3 Q4 2SC4116 IC5 CONT IC1 M37560MFA 303GP RESET CPU D2 1SS355 Q6 DTC114TU KE hA lt _ EEpmow IC2 PC357N6T IC3 TC7S14FU PHOTO COUPLER IC6 A NJM2904 M lt IC6 NJM2904 DSCENC BD5242FVE TR IC4 BR24L32FV W 10 1 MAIN UNIT H L FI3 ALFY450E DSC DECODER BPF IC1 TA31136FN 4 FI1 FI2 2 FL 363 D1 D2 N XB15A308 Q1 3SK131 L 3SK131 L MUTE lt lt per K AMP MX lt lt lt ONG lt lt lt sw K AN I NOISE 2 P BUFF Q17 Q18 104 2SC4215 0 2SC4226 R25 S AV35 HSM88ASR TX RX ED SW AMP CR 768 21 25 MHz IC8 UPD3140GS PLL Q13 Q14 2SC4226 R25 D11 D12 MA77 D13 D14 HVC350B DSCENC IC2D NJM13403V Q15 2SC4215 O LPF DSA3A1 IC9 TA7805 S Q31 2SA1577 Q Q32 DTC144EU Q33 2SC1577 Q Q34 DTC144EU Q35 2SB1132 R Q36 2SC4116 BL D21 22 RF OUT DET Q21 FMW1 Q23 2SA1577 Q E gt wawa Common line 2 TX MUTE CTRL Q20 DTC144EU V
29. 5 C88 0 1 C103 0 22 SA CD N or SAM ol o 32 Oj we g 25 lt m gt 2SC4116 BL R96 680 Hi Pow 3 90V Low Pow 1 50V 2 5 28 w TU zn 25 4215 0 272 5 6 Ka 13 J 2SC4226 R25 C140 C149 135 47 P 47 22 P 7N018 ez en lt Ox 2564226 25 Ge 58 6 25 4215 O NEC TINGI 2SC4215 ag D Qi 2Jd z 1 oa oe ok 5V a xs R5 Ba C246 R204 0 001 ERJ3GE JPW C304 0 001 U N 5V j BEEP BPLVL SQLV HVS l lt C245 22 OO 2 lt 5V 1 2 3 4 5 6 7 8 9 DSCDEC DSCDEC 4 2 M nm KEYM TMUTE R156 22 k 6 001 YA OO t O m mnl PSTB U A PDATA UNLK 7 2SB11 lox 32 5 3 9 C305 0 001 YH DSCENC C306 47P YH DTC144EU SEND 11 2 C36 0 001 1 C R9 100 k C19 0 001 R10 33 qm 178 0 001 S C179 470 P SA 1 gri 25 15 R 3 22V 8 D2 XB15A308 56 LA 243 LA 243 0 001 00 00 gt C4 PTT C199
30. 5 O TE85R 2SC4215 O TE85R 2SC4215 O TE85R 2SC4226 T1 R25 DTC144EUA T106 FMW1 7148 DTC114EUA T106 2SA1577 T106 Q DTC144EUA T106 2SC4215 O TE85R 2SA1577 T106 Q DTC144EUA T106 2SA1577 T106 Q DTC144EUA T106 2SB1132 T100 R 2SC4116 BL TE85R XB15A308 XB15A308 1SV214 TPH2 1SV214 TPH2 1SV214 TPH2 1SV214 TPH2 1SS321 TE85R MA77 TX MA77 TX HVC350BTRF HVC350BTRF MA77 TX MA77 TX TC4W66F TE12L PD3140GS E1 058 TA7805S HSM88ASR TR HSM88ASR TR DSASA1 DA204K 1146 FL 363 21 7 MHz FL 363 21 7 MHz ALFY450E LA 243 LA 243 LA 243 LS 440 LS 440 LS 440 LS 440 ELJND R82JF MLG1608B 68NJ T MLG1608B 68NJ T NL 252018T 2R7J 0 25 1 9 8TL 80N MLG1608B R10J T MLG1608B R10J T MLG1608B 47NJ T MLG1608B 47NJ T LA 253 LW 25 MLG1608B R10J T MLG1608B R10J T ERJ3GEYJ 104 V 100 ERJ3GEYJ 393 V 39 kQ M Mounted side T Mounted on the Top side B Mounted on the Bottom side MAIN UNIT ORDER ERJ3GEYJ 473 V 47 ERJ3GEYJ 561 V Q ERJ3GEYJ 1 0 V 1 Q 7030003640 7030003410 7030004050 7030003680 7030003260 7030003680 7030003680 7030003680 7
31. 810 8930060930 8610011600 8930060950 9830060990 8930060960 8930060970 8820001260 8810010230 8850002000 8810010240 Screw abbreviations CHASSIS PARTS REF NO ORDER NO DESCRIPTION Cable OPC 1249A Cable OPC 1250A Cable OPC 1285A 2715 front panel 2715 front panel A 2715 front panel B 2715 rear panel 2715 rear panel A 2715 rear panel B 2715 key 2715 key A 2715 PTT rubber 2715 PTT rubber A 2715 A PTT holder 2715 rubber 2715 rubber A 2715 main seal 2715 hanger knob 2715 bush plate 2715 MIC sheet O ring AY O ring AZ 2715 screw 2 6x18 SUS screw BiH M4x8 ZK Spring washer M4 SUS Screw PH BO 2x6 NI MP1 C PH Black White Gray Black White Gray Black White Gray Black White Gray Black White Gray Black White Gray N Q c c c Self tapping BiH Bind head NI Nicke ZK Black SUS Stainles 141 UNIT abbreviations CHASSIS 5 MAIN UNIT MAIN UNIT REF NO ORDER NO DESCRIPTION QTY 7700002640 Microphone KUC3523 040245 MP17 C MP16 C MAIN UNIT MP6 C Unit mm inch 42 1 2182
32. B 1E 104K T C1608 CH 1H 221J T C1608 CH 1H 221J T C1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 JB 1E 104K T C1608 JB 1H 682K T C1608 JB 1H 471K T C1608 JB 1H 103K T C1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1H 223K T C1608 JB 1H 223K T C1608 JB 1A 224K T C1608 JB 1E 104K T C1608 JB 1H 473K T ECHU 1C 333JB5 C1608 JB 1E 104K T C1608 JB 1H 222K T C1608 JB 1H 103K T C1608 JB 1A 224K T C1608 JB 1H 102K T ECST1VY224R C1608 JB 1H 102K T C1608 CH 1H 470J T C1608 CH 1H 390J T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 103K T C1608 JB 1A 105K T C1608 JB 1H 102K T C1608 CH 1H 1R5B T C1608 JB 1H 102K T C1608 CH 1H 1R5B T C1608 CH 1H OR5B T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 CH 1H 060 C1608 JB 1H 102K T C1608 CH 1H 220J T C1608 JB 1H 102K T C1608 CH 1H 470J T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 CH 1H 470J T C1608 JB 1H 102K T C1608 CH 1H 220J T C1608 JB 1H 102K T C1608 CH 1H 030B T C1608 CH 1H 470J T C1608 JB 1H 102K T C1608 CH 1H 220J T ECST1AY106R C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 471K T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T S Surface mount MAIN UNIT ORDER ORDER PR
33. B 1H 103K T C1608 JB 1E 104K T C1608 JB 1H 103K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 JB 1H 472K T C1608 JB 1H 103K T C1608 JB 1H 103K T C1608 JB 1H 223K T S ELECTROLYTIC ECEV1CA220SR S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S CONNECTOR S CONNECTOR LCD S LED S LED S LED S LED S LED S LED PCB LCD CONTACT C1608 JB 1H 103K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 CH 1H 240J T C1608 CH 1H 220J T C1608 JB 1H 471K T C1608 JB 1H 471K T C1608 JB 1H 102K T 30FLT SM1 TB B4B ZR SM3 TF 1508251 00 0 SML 311YTT86 SML 311YTT86 FY1101F TR LED FY1101F TR LED FY1101F TR LED FY1101F TR LED B 6096A SRCN 2685 SP N W 0000000 S Surface mount MAIN UNIT ORDER emm TA31136FN D EL NJM13403V 1110003490 1110005320 1110003650 1150002170 1110003090 1140003830 1130007610 1110002020 1580000540 1580000540 1530002600 1530002850 1530002850 1590000430 1530002920 1530002920 1530002600 1530002600 1530002600 1530002920 1590000430 1590000670 1590000680 1510000920 1590000430 1530002600 1510000920 1590000430 1510000920 1590000430 1520000460
34. 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 ELECTROLYTIC ECEV1CA100SR 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 ELECTROLYTIC ECEV1CA100SR S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S CERAMIC S MYLAR S CERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S TANTALUM 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 CERAMIC S CERAMIC S CERAMIC S CERAMIC S CERAMIC S TANTALUM S CERAMIC S CERAMIC S CERAMIC C1608 CH 1H OR5B T C1608 CH 1H 020B T C1608 CH 1H 100D T C1608 CH 1H 030B T C1608 CH 1H 040B T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 CH 1H 020B T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 CH 1H 560J T C1608 CH 1H 100D T C1608 JB 1H 102K T C1608 JB 1E 104K T C1608 JB 1H 103K T C1608 CH 1H 050B T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 JB 1H 473K T C1608 JB 1E 104K T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 CH 1H 101J T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 J
35. CIRCUIT MAIN UNIT The VCO outputs from Q13 014 are buffer amplified at the buffer amplifiers Q15 and Q16 and are then sent to the Tx Rx switch D16 and D17 The receive LO signal is applied to the 1st mixer circuit Q2 through a low pass filter and the transmit signal is applied to the pre drive amplifier 017 A portion of the VCO output is reapplied to the PLL IC 108 pin 2 via the buffer amplifier 026 4 4 DSC CIRCUITS 4 4 1 DSC ENCODE CIRCUIT LOGIC BOARD AND MAIN UNIT The DSC signal is created at the CPU IC1 pin 9 The sig nal passes through the buffer amplifier IC6A pins 1 3 and is then applied to the D A convertor R176 R1 79 to convert into the analog signal The analog signal passes through the low pass filter MAIN unit IC2D pins 12 14 and is then applied to the VCO circuit to modulate the DSC signal 4 4 2 DSC DECODE CIRCUIT MAIN UNIT AND LOGIC BOARD The AF signal from the FM IF IC IC1 pin 9 are filtered at the low pass filter IC2A pins 1 3 to suppress unwanted higher noise signals The filtered signals are converted ana log signals into digital signals at the DSC decoder IC 103 and are then applied to the CPU LOGIC board IC1 pin 22 via the DSCDEC signal 4 5 LOGIC CIRCUITS LOGIC BOARD e CPU is an 8 bit single chip micro computer and contains LCD driver serial I O timer A D converter programmable ROM and RAM The CPU controls to display characters on the
36. ERAMIC S CERAMIC S CERAMIC S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S ELECTROLYTIC ECEV1CA100SR 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 S CERAMIC S TANTALUM S TANTALUM S CERAMIC S TRIMMER S CERAMIC S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S CERAMIC S ELECTROLYTIC ECEV1CA100SR S CERAMIC S CERAMIC S ELECTROLYTIC ECEV1CA100SR 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 TEESVA 1V 473M8L TEESVA 1C 225M8L TZC3R100A110R00 C1608 JB 1H 102K T HM60SJ CH 180J 500V C1608 JB 1H 102K T C1608 JB 1H 102K T HM60SJ CH 050C 500V C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 103K T C1608 JB 1H 102K T C1608 CH 1H 101J T C1608 JB 1H 471K T C1608 CH 1H 220J T C1608 CH 1H 101J T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 471K T C1608 JB 1H 102K T C1608 JB 1H 102K T 16 MV 470 HC C1608 JB 1E 104K T C1608 JB 1E 104K T C1608 JB 1H 103K T C1608 JB 1A 105K T C1608 JB 1H 102K T C1608 JB 1A 224K T C1608 JB 1H 102K T C1608 JB 1H 103K T C1608 JB 1H 222K T C1608 CH 1H 680J T C
37. ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 224 V 220 ERJ3GEYJ 103 V 10 ERJ3GEYJ 104 V 100 ERJ3GEYJ 103 V 10 ERJ3GEYJ 105 V 1 ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 223 V 22 kO ERJ3GEYJ 104 V 100 ERJ3GEYJ 183 V 18 ERJ3GEYJ 683 V 68 ERJ3GEYJ 683 V 68 ERJ3GEYJ 683 V 68 ERJ3GEYJ 273 V 27 NTCG16 4BH 103KT ERJ3GEYJ 472 V 4 7 ERJ3GEYJ 223 V 22 kO RV 110 RH03A3AS4X0AA 473 ERJ3GEYJ 273 V 27 kQ ERJ3GEYJ 470 V 47 Q ERJ3GEYJ 822 V 8 2 kQ ERJ3GEYJ 123 V 12 kQ ERJ3GEYJ 123 V 12 ERJ3GEYJ 471 V 470 Q ERJ3GEYJ 683 V 68 kQ ERJ3GEYJ 101 V 100 ERJ3GE JPW V ERJ3GEYJ 470 V 4 ERJ3GEYJ 102 V E 1 ERJ3GEYJ 100 V 10 Q ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 331 V 330 Q ERJ3GEYJ 331 V 330 Q ERJ3GEYJ 332 V 3 3 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 222 V 2 2 ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 222 V 2 2 kQ ERJ3GEYJ 392 V 3 9 ERJ3GEYJ 472 V 4 7 kQ HM60SJ CH 270J 500V HM60SJ CH 040C 500V HM60SJ CH 180J 500V HM60SJ YB 102K 500V HM60SJ CH 270J 500V HM60SJ CH 220J 500V C1608 CH 1H 080D T C1608 CH 1H 100D T C1608 CH 1H 100D T C1608 CH 1H 050B T C1608 JB 1H 102K T C1608 JB 1E 104 C1608 JB 1H 103K T C1608 JB 1H 102 C1608 JB 1E 104 C1608 CH 1H 030B T C1608 CH 1H 100D T C1608 JB 1H 102K T C1608 CH 1H 030B T C1608 CH 1H 020B T C1608 CH 1H 100D T C1608 JB 1E 104 T T T T T T T T T T T T T T T
38. Icom Inc 1401117 1 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan 2003 Icom Inc
39. LCD too e SYSTEM CLOCK CIRCUIT X1 is a ceramic oscillator and oscillate 7 9872 MHz system clock for the CPU IC1 e RESET CIRCUIT IC5 which is a reset IC outputs a reset signal HIGH pulse signal to the CPU IC1 pin 33 from pin 1 when the trans ceiver turns power ON lt LOW BATTERY DETECTOR HVS voltage is divided by R14 and R15 and is applied to the low battery detector section in the CPU pin 1 DIMMER CIRCUIT CPU IC1 Q2 Q3 and Q4 compose dimmer circuit The cir cuit controls 4 steps LCD backlight 052 057 UART PORT IC M302 has the UART port which is used for cloning data and NMEA interface The signals pass through the photo coupler circuit IC2 and are then applied to the buffer amplifier 103 pin 2 The amplified signals are applied to the CPU IC1 pin 20 4 6 POWER SUPPLY CIRCUITS Same voltage as the HV line which is passed through the PWR switch VR A board R1 5 V converted from the HVS line at the EN regulator circuit MAIN unit IC9 Transmit 5 V controlled by the T5 control circuit MAIN unit Q31 Q32 using the SEND signal from CPU LOGIC board IC1 The controlled voltage is applied to the transmitter circuit Receive 5 V controlled by the R5 control circuit MAIN unit Q33 Q34 using the RCV signal from CPU LOGIC board The controlled voltage is applied to the receiver circuit Receive 8 V converted from the HVS and R5 lines at t
40. R 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 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 ERJ3GEYJ 562 V 5 6 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 103 V 10 ERJ3GEYJ 154 V 150 kQ ERJ3GEYJ 473 V 47 kQ ERJ3GEYJ 103 V 10 ERJ3GEYJ 270 V 27 ERJ3GEYJ 270 V 27 Q ERJ3GEYJ 270 V 27 Q ERJ3GEYJ 393 V 39 ERJ3GEYJ 473 V 47 kQ ERJ3GEYJ 102 V 1 kQ ERJ3GEYJ 123 V 12 ERJ3GEYJ 332 V 3 3 kQ ERJ3GEYJ 102 V 1 kQ ERJ3GEYJ 391 390 ERJ3GEYJ 391 V 390 ERJ3GEYJ 221 V 220 Q ERJ3GEYJ 682 V 6 8 kQ ERJ3GEYJ 153 15 ERJ3GEYJ 102 V 1 kQ ERJ3GEYJ 151 V 150 ERJ3GEYJ 103 V 10 ERJ3GEYJ 103 V 10 ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 104 V 100 ERJ3GEYJ 105 V 1 MO ERJ3GEYJ 103 V 10 ERJ3GEYJ 682 V 6 8 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 104 V 100 ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 103 V 10 kQ ERJ3GEYJ 103 V 10 ERJ3GEYJ 105 V 1 MO C1608 JB 1H 103K T C1608 JB 1H 471K T C1608 JB 1H 103K T C1608 JB 1H 471K T C1608 J
41. STOR 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 THRMISTOR 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 CERAMIC CERAMIC CERAMIC CERAMIC CERAMIC 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 ERJ3GEYJ 104 V 100 RV 143 471 ERJ3GEYJ 183 V 18 ERJ3GEYJ 101 V 100 ERJ3GEYJ 103 10 ERJ3GEYJ 221 V 220 Q ERJ3GEYJ 103 10 ERJ3GEYJ 332 V 3 3 ERJ3GEYJ 392 V 3 9 TN10 3C471JT ERJ3GEYJ 472 V 4 7 kO ERJ3GEYJ 101 V 100 MCR10EZHJ 4 7 Q 4R7 ERJ3GEYJ 153 15 ERJ3GEYJ 122 V 1 2 kO ERJ3GEYJ 105 V 1 ERJ3GEYJ 223 V 22 kO ERJ3GEYJ 103 V 10 ERJ3GEYJ 105 V 1 ERJ3GEYJ 105 1 ERJ3GEYJ 105 1 ERJ3GEYJ 104 V 100 ERJ3GEYJ 272 V 2 7 kO ERJ3GEYJ 104 V 100
42. U TE85R BR24L32FV WE2 BD5242FVE TR NJM2904M TE1 1520000460 S TRANSISTOR 2581132 T100 1530002850 S TRANSISTOR 2SC4116 BL TE85R 1530002850 S TRANSISTOR 25 4116 TE85R 1590001050 S TRANSISTOR DTC114TUAT106 1750000550 S DIODE 1750000550 S DIODE 1750000150 S DIODE 155355 17 155355 17 DA204K 1146 6050011800 S XTAL CR 769 7 9872 MHz M Mounted side T Mounted on the Top side B Mounted on the Bottom side 7030003530 7030003560 7030003560 7030003560 7030003700 7030003640 7030003560 7030003250 7030003250 7030003250 7030003630 7030003640 7030003440 7030003570 7030003500 7030003440 7030003390 7030003390 7030003360 7030003540 7030003580 7030003440 7030003340 7030003560 7030003560 7030003560 7030003680 7030003800 7030003560 7030003540 7030003560 7030003560 7030003680 7030003560 7030003560 7030003560 7030003800 4030006900 4030006850 4030006900 4030006850 4030006900 4030011600 4030006900 4030006900 4030006860 4030006900 4030006860 4030006880 4030006900 4030006900 4030008880 4510005310 4030006900 4030006900 4030006860 4030009650 4030007050 4030006850 4030006850 4030006860 6510021720 6510015540 5030002590 5040002310 5040002310 5040002660 5040002660 5040002660 5040002660 0910057311 8930061040 LOGIC BOARD ORDER E NN S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTOR S RESISTO
43. U analyzes the noise condition and outputs the RMUTE signal to toggle the AF mute switches IC7B 4 1 7 WEATHER ALERT DECODER CIRCUIT MAIN UNIT AND LOGIC BOARD When the weather alert function is activated and a 1050 Hz alert tone from an NOAA weather radio broadcast is received the IC M302 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 IC1 pin 9 pass through the low pass filter IC2A via the DET signal and are then applied to A D port of the CPU LOGIC board IC1 pin 8 as WXDEC signal The CPU has the tone decoder function When a 1050 Hz signal is detected by software decode the CPU LOGIC BOARD IC1 controls beep tones and the ALT indicator AF AMPLIFIER CIRCUIT External SP HVS AF Internal SP FRONT unit 4 2 TRANSMITTER CIRCUITS 4 2 1 MICROPHONE AMPLIFIER CIRCUIT MAIN UNIT 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 microphone are amplified at the microphone amplifier IC2B via the analog switch IC7A pins 1 2 A capacitor C223 and resistor R167 are con nected to the amplifier to obtain the pre emphasis charac teristics The amplified signals are applied to the IDC amplifier IC2C pin 9 and are passed through the splatter filter IC2D pins
44. at the IF amplifier Q4 The amplified signal is applied to the 2nd mixer circuit IC1 4 1 4 2ND IF AND DEMODULATOR CIRCUITS MAIN UNIT 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 IC1 contains the 2nd local oscillator 2nd mixer limiter amplifier quadrature detector and noise detector circuits etc The 1st IF signal from Q4 is applied to the 2nd mixer section of IC1 pin 16 and is mixed with a 21 25 MHz 2nd LO sig nal generated at the PLL circuit using the reference fre quency 21 25 MHz to produce a 450 kHz 2nd IF signal The 2nd IF signal from IC1 pin 3 is passed through the ceramic filter FI3 where unwanted signals are sup pressed and is then applied to the 2nd IF limiter amplifier in IC1 pin 5 The signal is applied to the FM detector sec tion in IC1 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 IC1 pin 9 is applied to the AF circuit 2nd IF filter 21 25 MHz 2 PLL IC IC8 7 X2 21 25 MHz IC1 TA31136F 13 C67 1st IF 21 7 from the IF amplifier Q4 C X1 SQL signal to the CPU 5 LOGIC b
45. e 8510015570 2685 Case Black 8510015680 2685 Case White 8510015690 2685 Case Gray 8930060440 2685 R PACKING 8930060450 2685 F PACKING Black White 8930061190 2685 F PACKING A Gray 8930034300 1542 ANT SEAL 8930052440 2345 B IC CLIP 8510015560 2685 MODULE cover 8930055070 2438 SHEET 8810008660 Screw PT BO M3x8 NI ZU BT 8810008200 Screw PT BO M2 6x6 NI ZU BT 8810002950 Screw BiH M3x6 SUS 8810004540 Screw BiH M3x8 SUS 8810004700 Screw PH AO 3x16 SUS 8930061410 2685 EARTH SPRING 8930049040 insulation plate FQ MAIN UNIT ORDER NO DESCRIPTION 1150002170 S AV35 R1 7210003140 TP96N97 15SK 10KA 2685 1 ACCESSORIES ORDER NO DESCRIPTION Gx 8900009040 Cable OPC 891 8950005110 2289 MIC hanger 8010017250 2040 Mobile bracket A Black 8010019400 2040 Mobile bracket B White 8010017250 2040 Mobile bracket Gray 8610010561 2040 Knob bolt 1 Black 8610010591 2040 Knob bolt A 1 White 8820001271 2040 Knob bolt C 1 Gray 8900012400 Cable OPC 1264 FRONT UNIT 7120000470 Jumper ERDS2T0 6910015690 8930005320 8510016170 0800007150 0800007160 0800007320 2510001240 8900012410 8210019830 8210020070 8210020360 8930060430 8310059500 8610011370 8610011630 8610011640 8930014280 8810008200 8930052010 8930060480 8110007970 8930060470 8930060490 8930052280 2685 Shield case
46. erc 6 1 EE 6 5 MECHANICAL PARTS AND DISASSEMBLY CABINET PARIS 7 1 Ma lt 7 3 SEMI CONDUCTOR INFORMATION BOARD LAYOUTS ANAN RR 9 1 OC 9 3 VR BOARD 9 5 SOL BOARD 9 6 nr EENE E E E 9 7 BLOCK DIAGRAM VOLTAGE DIAGRAM 11 1 C as 11 2 EID EE SM PUES ET ETSI 11 3 WA SOL BOARDS a EE E E o 11 4 MS 11 5 SECTION 1 GENERAL e Frequency coverage e Mode Usable channels Power supply requirement Usable temperature range Current drain at 13 8 V DC Antenna impedance Input impedance MIC Output impedance Audio Dimensions projections not included Weight TRANSMITTER Output power at 13 8 V DC Modulation Maximum frequency deviation Frequency tolerance Spurious emissions Adjacent channel power Residual modulation Audio harmonic distortion Audio frequency response RECEIVER Receive system Intermediate frequencies Sensitivity Squelch sensitivity Adjacent channel selectivity Spurious response Intermodulation rejection ratio Hum and noise Audio output power at 13 8 V DC Audio frequency response SPECIFICATIONS 156 025 157 425 MHz Tx 156 050 163 275 MHz Rx 16K0G3E FM 16K0G2B DSC All USA international and Ca
47. he R8 regulator circuit MAIN unit Q35 Q36 4 7 PORT ALLOCATIONS 4 7 1 CPU LOGIC BOARD IC1 Port D ipti Ham escription Input port for the HM 141 key signals Pushed key Input voltage 2 KEYM aj 2 02 V 30 12 V 3 00 V 0 13 V Hi Lo 3 84 V 0 10 V Port Input port for the Distress switch DTRS Low While the Distress switch is pushed Outputs the microphone muting circuit control signal zs Low While transmitting the DSC sig nal Input port for the transmit detecting 2 TXDET signal transmit power control gA iH emt H L Outputs the receiver RF attenuator 4 SQLV Input port for the squelch volume sig control signal nal Low While the attenuator is ON PCK Outputs the clock signal to the PLL IC Outputs the receiver mute control sig MAIN unit 8 pin 4 RMUTE nal 7 PDATA Outputs data signals to the PLL IC LOW MAIN unit IC8 5 Outputs the transmitter mute control TMUTE signal EN WXDEC port for the WX alert decode sig High While muting Outputs the T5 regulator MAIN unit SEND Q31 032 control signal High While transmitting DSCENC Outputs the DSC encode signal cab Outputs the R5 regulator MAIN unit 13 PSTB Outputs strobe signals for the PLL IC RCV Q33 Q34 control signal MAIN unit IC8 3 High While receiving 18 ECK Outputs the clock signal to the EEP Outputs special alarm audio signals ROM 104 6
48. hing circuit D2 4 1 2 RF CIRCUIT MAIN UNIT 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 the attenuator R2 C9 and a tunable bandpass filter D4 L6 C12 C15 where the object signals are led to the RF amplifier circuit Q1 Passing through the attenuator is 10 ONLY The amplified signals at Q1 are applied to other tunable bandpass filter D5 D7 L8 L9 C23 C26 C28 C32 to sup press unwanted signals and improve the selectivity The sig nals are then applied to the 1st mixer circuit 4 1 3 1ST MIXER AND 1ST IF CIRCUITS MAIN UNIT 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 two crystal filters at the next stage of the mixer The signals from the RF circuit are mixed with the VCO sig 2ND IF AND DEMODULATOR CIRCUITS C75 SQLV signal to the R1 on the SQL board WXDEC signal to the CPU LOGIC board IC1 DSCDEC signal to the DEC DETO signal to the AF mute switch IC7 BPF R42 9 10 165 C64 R43 nals at the 1st mixer circuit Q2 to produce a 21 7 MHz 1st IF signal The 1st IF signal is applied to two crystal filters FI1 F12 to suppress out of band signals and is then amplified
49. nadian channels plus 10 weather channels 13 8 V DC 10 negative ground 20 C to 60 C 4 F to 140 F Transmit at 25 W 5 5 A Max Receive max audio 1 5 A Max 50 nominal 2 40 153 W x 67 H x 132 D 6 W x258 H x5346 D in Approx 825 g 1 Ib 13 oz High 25 W Low 1W Variable reactance frequency modulation 5 0 kHz 10 ppm 0 dBc High power 56 dBc Low power 70 dB 40 dB Less than 10 at 6096 deviation 1 dB to 3 dB of 6 dB octave from 300 Hz to 2500 Hz Double conversion superheterodyne system Ist 21 7 MHz 2nd 450 kHz 0 22 uV at 12 dB SINAD Less than 0 22 uV More than 70 dB More than70 dB More than70 dB More than40 dB 4 5 W typical at 10 distortion with an 4 Q load 1 dB to 3 dB of 6 dB octave from 300 Hz to 3000 Hz Specifications are measured in accordance with TIA EIA 603 All stated specifications are subject to change without notice or obligation VHF MARINE CHANNEL LIST USA INT CAN Transmit Receive USA INT CAN Transmit Receive USA INT CAN Transmit Receive 186050 160650 187080 157080 70 70 156525 156525 ora 18505 16505 2r Rxony 16650 71 71 166575 1565_ 156 100 160 700 221 157 100 156 150 160 750 22A 22 157 100 156 150 156150 23 23 157 150 156 200 160 800 23A 157450 04 156 20
50. oard IC1 R44 4 1 5 AF AMPLIFIER CIRCUIT MAIN AND FRONT UNITS 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 pin 9 are applied to the de emphasis circuit R61 C89 The de emphasis circuit is an integrated circuit with frequency characteristic of 6 dB octave The integrated signals pass through the high pass filter Q5 R62 R67 C90 C91 to suppress unwanted lower noise sig nals The filtered signals are applied to the AF mute circuit IC7B and then passes through the VOLUME control VR board R1 via the VOL1 signal The signals are applied to the AF power amplifier IC6 pin 1 The output signal from 106 pin4 drives the internal external speaker 4 1 6 SQUELCH CIRCUIT MAIN UNIT LOGIC AND SQL BOARDS A squelch circuit cuts out AF signals when no RF signals are received By detecting noise components in the AF signals the squelch circuit switches the AF mute switch A portion of the AF signals from the FM IF IC IC1 pin 9 pass through the squelch adjustment volume SQL board R1 and are then applied to the active filter section pin 8 The active filter section amplifies and filters noise com ponents The filtered signals are applied to the noise detec tor section and output from pin 14 as the SQL signal The SQL signal is applied to the CPU LOGIC board IC1 pin 30 The CP
51. oltage line ap TX line L wam RA line Q22 DTC114EU lt lt A LLI O gt SECTION 11 11 1 GENERAL Lr i d GND dc AIN C i VIvqd 4 1 do 8154 4 1 d VH de 5 1 0105 doi 130 4 i 1 195 42 SINWL i WA3M 1 NIS 4 Ud do 1 c 1 Gi 95 d I alnAd d oz Q 23030 4 2 tr ON3OSd d zz lt TE Q ez d d rc q sz m IA d oz c ADS dz i Mida 4122 5 di 3339 6c dS m q os i J 1 WS 11406 i SP1 VR BOARD FRONT UNIT 08 QN5 PANNA zz D 71002 xod sz 1Sd o 5 1 qXT 0c Paos e PAINAT et PUWASA 01438 Lid SL POH zl b 030060 t Panny ON 9SQ 6 D AG 8 P AS 4 BATOS 23339 45 SI IWS L1140 n MAIN UNIT 11 1 J1 30FLT SM1 TB 11 2 MAIN UNIT R8 R21 RS 100 1 L71 15 4401 18 C24 05P sal _ 3P C22 10 Ss Zl a gt O D 0 23V 0 50 ot Q x TT N Ur R 3 95V J 1 R46 1
52. wfully used by the general public in USA waters 156 600 13 156 650 1 156 700 15 156 750 6 156 800 17 156 850 156 900 18 156 900 156 950 156 950 20 157 000 157 000 157 050 N O CD CO C1 CO CO 157 225 157 225 5 157 275 161 875 157 275 157 275 O gt NJ On CO CO 161 925 157 325 87 161 975 157 375 N CO N no OO gt ho gt gt 21 T k cO CO N GOO N gt CD WEATHER CHANNEL LIST Weather Weather Frequency MHz WX01 162 550 162 500 Wxo2 162 400 wxo7 162 525 SECTION 2 INSIDE VIEWS e MAIN UNIT AF power amplifier a ia a IC6 LA4425A 214 YGR amplifier NE Cd EFR K Q18 2SC4226 R25 i ES qM c3 Antenna switch 5V regulator S s AEN Ga SA m gt fao CU D1 D2 XB15A308 IC9 TA7805S aN EY fs UL ER gt Pre driver Reference oscillator Q17 2SC4215 O ae H X2 CR 768 DSC decoder IC3 NJM2211M Analog switch 107 TCAW66F VCO circuit Ceramic bandpass filter Crystal bandpass filter FI3 ALFY450E FL 363 FM IF IC PLL IC IC1 TA31136FN 8 UPD

IC-M302 Service manual - R

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