IC-M304 SERVICE MANUAL - R
Contents
1. Fel FM ut e MAIN UNIT TOP VIEW SECTION 9 BOARD LAYOUTS MAIN UNIT O J1 CHASSIS 1 4 MAIN UNIT LI Fb ET 12202 i i YT 8 HVS To J1 VR UNIT tT too ue SQL UNIT LOGIC UNIT TOP VIEW E e LINN 21907 Ef OL W1 MAIN UNIT a To W1 MAIN UNIT O MS 8Y91L INH 01 To W1 MAIN UNIT SQLV LOGIC UNIT BOTTOM VIEW MP13 FRONT UNIT To J1 MAIN UNIT SQL UNIT BOTTOM VIEW ES FRONT UNIT MAIN UNIT BOTTOM VIEW The combination of this side and the bottom side shows the board layout in the same configuration as the actual P C Board 20 H95 H100 H105 H1102. 16 Super X DS1 L MP1 L Ts MP3 L NOTE Once these parts are removed the glue must be applied to the area as described when assembling Manufacture Cemedine Co LOGIC UNIT EP2 L MAIN UNIT 137 0 5 1982 153 0 6 1 2 7 86 3 31 Unit mm inch UNiT ABBREVIATIONS C CHASSIS PARTS FRONT UNIT L LOGIC UNIT M MAIN UNIT VR VR UNIT SQL SQL UNIT SECTION 8 SEMICONDUCTOR INFORMATION e TRANSISTERS AND FETs DIODES e DTC114TUA e KTA1664Y 25 4215 e 25 4226 e 3SK131 155355 KDS122 188321 DSA3A1 HSM88ASRTR Marking 04 Marking QO Marking XX Marking R24 Marking V13 Marking 5D Marking C3 Marking F9 Marking green Marking C3 A 174 Jh FMW1 KRC402 e KRC404 KTA2015Y 4080 HVC350BTRF KDV214E e MA2S077 742 Marking W1 Marking NB Marking ND Marking Z Marking Q Marking BO Marking UO Marking S Marking M1U
3. 3 k k k 3 3 2 7 70 k 7k k k 4 1 2 1 1 3 1 1 1 1 1 2 1 4 4 2 2 3 3 3 2 4 4 4 1 3 1 0 9 5 102 3 49 4 101 5 47 4 104 4 38 1 104 4 39 4 102 4 38 4 109 1 35 5 96 7 34 3 99 2 43 7 103 5 34 8 98 34 3 101 5 27 6 99 5 26 9 101 3 24 3 102 8 16 8 102 8 16 8 102 8 15 5 98 3 30 3 100 5 20 3 100 6 17 9 97 9 17 1 99 3 14 3 97 9 14 3 86 6 11 9 46 3 25 7 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA M Mounted side T Mounted on the Top side B Mounted on the Bottom side 6 2 S Surface mount MAIN UNIT MAIN UNIT ORDER H V DESCRIPTION ORDER DESCRIPTION NO 4030006860 C1608 JB 1H 102K T 4030009350 C1608 CH 1H 3R5B T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030007100 C1608 CH 1H 560J T 4030007010 C1608 CH 1H 100D T 4030006860 C1608 JB 1H 102K T 4030011600 C1608 JB 1E 104K T 4030011600 C1608 JB 1E 104K T 4030006900 C1608 JB 1H 103K T 4030009920 C1608 CH 1H 050B T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030006900 C1608 JB 1H 103K T 4030008920 C1608 JB 1H 473K T 4030006900 C1608 JB 1H 103K T 4030011600 C1608 JB 1E 104K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030007130 C1608 CH 1H 101J T 4510008540 EEE1CA100SR 4030006860 C1608 JB 1H 102K T 4030006900
4. SERVICE MANUAL VHF MARINE TRANSCEIVER 4 S 14311XZ C1 D ec 2006 Icom Inc INTRODUCTION This service manual describes the latest service information for the IC M304 VHF MARINE TRANSCEIVER at the time of publication MODEL VERSION SYMBOL COLOR USA IC M304 U S A USA 01 Super White USA 02 To upgrade quality any electrical or mechanical parts and internal circuits are subject to change without notice or obligation CAUTION NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 15 V This will ruin the transceiver DO NOT reverse the polarities of the power supply when connecting the transceiver DO NOT apply an RF signal of more than 20 dBm 100 mW to the antenna connector This could damage the transceiver s front end SUBMERSIBLE DUAL 9 6 TAG 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 1110003491 S IC TA31136FNG IC M304 8820001210 Screw 2438 screw IC M304 MAIN UNIT 5 pieces 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 disconne
5. a UPD3140GS KTA1664 407014 36 MLD n m szza 9zzu LLOSZYW 25077 KTC4075 WASW 89 0 NR 2629 KTC4075 R74 100K Q7 wag0do YASH 272 NJM2211M 30FLT SM2 TB To LOGIC UNIT SP BEEP SQLV WXDEC DSCDEC RCV SEND 11129 e MAIN UNIT PARTS LIST VOLTAGE DIAGRAM SECTION 12 HM 164B SW G DESCRIPTION T E 6180003720 SP0203 R22K PF 0 22U 6180003720 SP0203 R22K PF 0 22U REPLACEMENT UNIT DIMENTIONS FE WI CHASSIS PIT 7010007590 RD1 4S 123 H EE 7010007600 RD1 4 682JTA 7010007610 RD1 4 153JTA 7010007620 RD1 4 333JTA ORDER NO UNIT NAME Optional product HM 164B Black Optional product HM 164SW Super White Optional product HM 164G Gray 4030018660 C1608 JB 1H 223K T 36 85 70 8 2 HILO ON 587 4030018670 C1608 CH 1H 471J 42 1 21 32 5 5 7 82 CHASSIS PARTS LIST ORDER NO 8900012212 OPC 1249B Black 8900013570 OPC 1406 Super White 8900012502 OPC 1285B Gray 7700002640 KUC3523 040245 DESCRIPTION HULO 2260002780 SKHHLPA
6. NMTXD Outputs NMEA command signal NMRXD Input port for the NMEA signal PWR Input port for power switch VR BOARD 1 Low When VOL is pushed PAMUTE Outputs control signal to the AF Public Ad dress mute circuit Q65 High During mute Outputs power control signal to the power control circuit Q61 Q62 High While the transceiver is switched ON Outputs transmit mute signal to the APC circuit 12 3 High During mute Outputs control signal to the R5 control circuit Q53 Q54 High While receiving Outputs TX power control signal to the TX power control circuit Q17 D11 High 25 W Low 1 W Outputs attenuator control signal to the attenuator 022 High Attenuator ON Input port for the PTT switch HM 150B SW 51 Low PTT key is pushed Input port for the UNLK signal from the PLL IC1 pin7 High PLL circuit is unlocked Port name Description DTRS RMUTEP Input port for the DISTRESS key LOGIC BOARD 59 Low DISTRESS key is pushed Outputs AF Public Address mute signal to the AF mute circuit IC4 pin12 Low During mute RMUTES Outputs AF mute signal to the AF mute circuit IC4 pin 5 for the connected HM 157 Op tional product Low During mute RMUTEM Outputs AF internal speaker mute signal to the AF mute circuit 4 pin 6 Low During mute MMUTEP
7. LOGIC UNIT Incl SQL and VR UNITs MAIN UNIT HM 164B SW G DSC CIRCUITS yc LOGIC CIRCUITS Ced e ho or tet umania pus ghee at POWER SUPPLY CIRCUIT See aaa ede te ede u baka neve 3 des PORT ALLOCATIONS vic acd glee ga aap AP a Pe aga an saa FREQUENCY ADJUSTMENT 5 55 uyana ei cep wh uN TRANSMIT ADJUSTMENT 2 weld LER ER pee eden wha als SECTION 1 SPECIFICATIONS GENERAL e Frequency coverage Type of emission Channel spacing e Antenna impedance Operating temperature range Power supply requirement Current drain At 13 8 V DC approx Dimensions Projections not included Weight Approx TRANSMITTER Output power At 13 8 V DC Modulation Maximum frequency deviation Frequency stability Spurious emissions Adjacent channel power Audio harmonic distortion Residual modulation Audio frequency response Microphone impedance RECEIVER Receive system Intermediate frequencies Sensitivity Squelch sensitivity Adjacent channel selectivity Spurious response Intermodulation rejection ratio Hum and noise Audio frequency response Audio output power Audio output impedance TX 156 025 157 425 MHz RX 156 050 163 275 MHz 16KOG3E 16K0G2B DSC 25 kHz 50 Q Nominal 20
8. 2 1 1 6 1 1 1 5 47 2 2 47 68 47 T 39 1 L 8 3 0 0 0 0 2 5 7 7030003760 S ERJ3GEYJ 474 V 7030003720 S ERJ3GEYJ 224 V 7030003490 S ERJ3GEYJ 272 V 7030003390 S ERJ3GEYJ 391 V 7030003620 S ERJ3GEYJ 333 V 7030003620 S ERJ3GEYJ 333 V 7030003480 S ERJ3GEYJ 222 V 7030003280 S ERJ3GEYJ 470 V 7030003760 S ERJ3GEYJ 474 V 7030003640 S ERJ3GEYJ 473 V 7030003680 S ERJ3GEYJ 104 V 7030003630 S ERJ3GEYJ 393 V 7030003580 S ERJ3GEYJ 153 V 7030003860 S ERJ3GE JPW V 7030003480 S ERJ3GEYJ 222 V 7030003440 S ERJ3GEYJ 102 V 7030003440 S ERJ3GEYJ 102 V 7030003410 S ERJ3GEYJ 561 V 7030003640 S ERJ3GEYJ 473 V 7030003440 S ERJ3GEYJ 102 V 7030003320 S ERJ3GEYJ 101 V 7030003620 S ERJ3GEYJ 333 V 7030003600 S ERJ3GEYJ 223 V 7030003680 S ERJ3GEYJ 104 V 7030003550 S ERJ3GEYJ 822 V 7030003320 S ERJ3GEYJ 101 V 7030003390 S ERJ3GEYJ 391 V 7030003550 S ERJ3GEYJ 822 V 7030003350 S ERJ3GEYJ 181 V 7030003550 S ERJ3GEYJ 822 V 7030003420 S ERJ3GEYJ 681 V 7030003660 S ERJ3GEYJ 683 V 7030003320 S ERJ3GEYJ 101 V 7030003610 S ERJ3GEYJ 273 V 7030003440 S ERJ3GEYJ 102 V 7030003480 S ERJ3GEYJ 222 V 7030003390 S ERJ3GEYJ 391 V 7030003200 S ERJ3GEYJ 100 V KAKAK 70k 20 k 7k 9 0
9. 528 513 514 56 55 54 53 52 5 CL co 517 518 519 22 523 524 525 526 521 5 2 3 4 SEG28 SEG13 8 9 SEG18 SEG19 SEG22 12 SEG23 13 SEG24 14 SEG25 15 SEG26 16 30 28 26 24 22 20 18 16 14 31 32 33 34 37 OUT VDD VSS cD NC S 80942CNMC NJM2904M 38 39 40 41 2 4 43 4 4 4 5 6 7 4 4 48 49 SCAN CH WX CH16 12 10 8 6 4 2 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 DSCENC RMUTE PTTC PTT SQL GND 0 46Y 7 9872MHz 30FLT SM2 TB SOLC BPF PCK UNLK bOT WH OL 105 pue WA OL S5B PH K S 1264 qo080eT MAIN UNIT LA 243 IP TZAGN LA 243 A 0 001 L308CCB J common une N
10. C to 60 C 4 F to 140 F 13 8 V DC negative ground Receiving 1 5 A at max audio Transmitting 5 5 A at 25 W 153 W x67 H x133 D mm 6 a2 W x2 5 H x5 D in 825 g 1 8 Ib 25 W High 1 W Low Variable reactance frequency modulation 5 0 kHz 10 ppm Less than 70 dBc at 25 W Less than 56 dBc at 1 W More than 70 dB Less than 10 at 60 deviation More than 40 dB 1 dB to 3 dB of 6 dB oct from 300 Hz to 2500 Hz 2 Double conversion superheterodyne system dst IF 21 7 MHz 2nd IF 450 kHz 13 typical at 12 dB SINAD Less than 13 dBu More than 70 dB More than 70 dB More than 70 dB More than 40 dB 1 dB to 3 dB of 6 dB oct from 300 Hz to 3000 Hz 4 5 W typical 10 distortion with a 4 Q load 40 Specifications are measured in accordance with TIA EIA 603 All stated specifications are subject to change without notice or obligation CHANNEL LIST Channel number Frequency MHz Channel number Frequency MHz Channel number Frequency 2 Channel number Frequency MHz USA INT CAN Transmit Receive USA INT CAN Transmit Receive USA INT CAN Transmit Receive USA INT CAN Transmit Receive 01 01 156 050 160 650 21 21 157
11. DSC DECODER IC3 NJM2211M IDC LPF 10 NJM4558M VCO 2 ee 2nd IF filter FI3 LT450EW IF IC 1st IF filters IC1 TA31136FN PLL IC FL 368 8 uPD3140GS Fl2 FL 399A e LOGIC UNIT 1 M37560EFGP IC4 HN58X2464T 1 DIMMER CONTROL CIRCUIT TONE BUFFER 02 1664 126 NJM2904M 03 04 KTC4075 SECTION3 DISASSEMBLY INSTRUCTION 1 Removing the front panel 3 Removing the LOGIC UNIT Unscrew 8 screws A as shown below and then remove Disconnect 2 cables 1 and the case in the direction of the arrow 2 Unsolder 2 points Unscrew 4 screws 9 to remove the LOGIC UNIT RONT ANEL LOGIC UNIT 2 Removing the MAIN UNIT D Unsolder the external speaker cable 2 points and DC cable 2 points on the bottom side of the MAIN UNIT 2 Unsolder the antenna connector B 3 points 3 Remove the clip Unscrew 2 screws D and 7 screws E to remove the MAIN UNIT MAIN UNIT 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 connector and pass through the low pass filter L1 L2 C3 5 The s
12. Outputs microphone Public Address mute signal to the AF mute circuit IC5 pin 6 Low During mute MMUTES Outputs microphone mute signal to the AF mute circuit IC5 pin 5 for the connected HM 157 Optional product Low During mute MMUTEM Outputs microphone HM 150B SW mute sig nal to the AF mute circuit 105 pin 13 Low During mute Outputs AF MIC control signal to the AF mute circuit IC6 pin 5 High PTT switch HM 157 is pushed Outputs AF MIC control signal to the AF mute circuit IC5 pin 12 Input port for the LO DX key LOGIC BOARD S8 Low LO DX key is pushed Input port for the DSC key LOGIC BOARD S7 Low DSC key is pushed Input port for the PA key LOGIC BOARD 56 Low PA key is pushed Input port for the CH WX key LOGIC BOARD 5 Low CH WX key is pushed Input port for the SCAN key LOGIC BOARD 54 Low SCAN key is pushed Input port for the 16 key LOGIC BOARD S3 Low 16 key is pushed Input port for the W key LOGIC BOARD S2 Low key is pushed Input port for the A key LOGIC BOARD 51 Low A key is pushed Outputs dimmer control signal to the LCD control circuit LOGIC BOARD 02 Outputs beep signal to the AF amplifier IC9 pin 1 DS BPF While transmitting Outputs DSC encode signal as DSENC to the LPF IC8 pin 5 via the buffer amplifier LOG
13. www icomeurope com E mail info icomeurope com Icom Spain S L Ctra Rubi 88 08190 Sant Cugat del Valles Barcelona SPAIN Phone 34 93 590 26 70 Fax 34 93 589 04 46 URL http www icomspain com E mail icom Q9 icomspain com Icom UK Ltd Unit 9 Sea St Herne Bay Kent CT6 8LD U K Phone 44 01227 741741 44 01227 741742 URL http www icomuk co uk E mail info Gicomuk co uk Icom France s a s 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 E mail icom Q9 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 E mail sales asia icom com Icom Polska Sopot 3 Maja 54 Poland Phone 48 58 550 7135 Fax 48 58 551 0484 E mail icompolska icompolska com pl Count on us Icom Inc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan 5 14311 2 1 2006 Icom Inc REPLACEMENT UNIT INFORMATION FOR IC M304 164 ORDER NO UNIT NAME Optional product HM 164B Black Optional product HM 164SW Super White Optional product HM 164G Gray UNIT NAME 0329890101 U M304 01 FRONT FRONT LOGIC VR SQL and HM 164B Black 0329890201 U M304 02 FRONT FRONT LOGIC VR SQL and HM 164SW Super White
14. 0329890301 U M304 03 FRONT FRONT LOGIC VR SQL and HM 164G Gray ORDER NO UNIT NAME 0329890102 U M304 01 MAIN MAIN CHASSIS
15. 050 161 650 68 68 68 156 425 156 425 86A 157 325 157 325 O1A 156 050 156 050 21A 21A 157 050 157 050 69 69 69 156 475 156 475 87 87 87 157 375 161 975 02 02 156 100 160 700 21b Rx only 161 650 7073 70 3 70 156 525 156 525 87A 157 375 157 375 03 03 156 150 160 750 22 157 100 161 700 71 71 71 156 575 156 575 88 88 88 157 425 162 025 156 150 156 150 22 22 157 100 157 100 72 72 72 156 625 156 625 88A 157 425 157 425 04 156 200 160 800 23 23 157 150 161 750 73 73 73 156 675 156 675 156 200 156 200 23A 157 150 157 150 74 74 74 156 725 156 725 05 156 250 160 850 24 24 24 157 200 161 800 75 75 75 156 775 156 775 156 250 156 250 25 25 25 157 250 161 850 76 76 76 156 825 156 825 06 06 06 156 300 156 300 256 Rx only 161 850 777 77 77 156 875 156 875 07 156 350 160 950 26 26 26 157 300 161 900 78 156 925 161 525 07 07 156 350 156 350 27 27 27 157 350 161 950 78 78A 156 925 156 925 08 08 08 156 400 156 400 28 28 28 157 400 162 000 79 156 975 161 575 09 09 09 156 450 156 450 286 Rx only 162 000 79A 79 156 975 156 975 10 10 10 156 500 156 500 60 60 156 025 160 625 80 157 025 161 625 11 11 11 156 550 156 550 61 156 075 160 675 80A 80A 157 025 157 025 12 12 12 156 600 156 600 61A 61A 156 075
16. 156 075 81 157 075 161 675 WX channel Frequency MHz 132 13 13 156 650 156 650 62 156 125 160 725 81 81A 157 075 157 075 Transmit Receive 14 14 14 156 700 156 700 62A 156 125 156 125 82 157 125 161 725 1 RX only 162 550 152 15 15 156 750 156 750 63 156 175 160 775 82A 82A 157 125 157 125 2 RX only 162 400 16 16 16 156 800 156 800 63A 156 175 156 175 83 83 157 175 161 775 3 RX only 162 475 177 17 177 156 850 156 850 64 64 156 225 160 825 83A 83A 157 175 157 175 4 RX only 162 425 18 156 900 161 500 64A 64A 156 225 156 225 83b Rx only 161 775 5 RX only 162 450 18A 18A 156 900 156 900 65 156 275 160 875 84 84 84 157 225 161 825 6 RX only 162 500 19 156 950 161 550 65A 65 65A 156 275 156 275 84A 157 225 157 225 7 RX only 162 525 19A 19A 156 950 156 950 66 156 325 160 925 85 85 85 157 275 161 875 8 RX only 161 650 20 20 20 157 000 161 600 66A 66A 66 156 325 156 325 85A 157 275 157 275 9 RX only 161 775 20A 157 000 157 000 672 67 67 156 375 156 375 86 86 86 157 325 161 925 10 RX only 163 275 1 Low power only 2 Momentary high power 3 DSC operation only NOTE Simplex channels 3 21 23 61 64 81 82 and 88 CANNOT be lawfully used by the general public in U S A waters SECTION 2 INSIDE VIEWS MAIN UNIT TX POWER MODULE IC4 S AV35A
17. 2030000350 FL 368 21 7 MHz 2030000481 FL 399A 21 7 MHz 2020002250 LT450EW 6070000290 JTB450C24 6050012121 CR 804A 21 250 MHz 54 5 41 3 6110001600 LA 243 6110001600 LA 243 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ CJ 6 1 MAIN UNIT MAIN UNIT ORDER HIV ORDER HIV NO DESCRIPTION LOCATION NO DESCRIPTION LOCATION 6110001600 LA 243 7030003560 S ERJ3GEYJ 47 64 6150003821 LS 440 LF 7030003580 S ERJ3GEYJ 49 6 60 2 6150003821 LS 440 LF 7030003370 15 ERJ3GEYJ 50 9 64 6150003821 LS 440 LF 7030003680 S ERJ3GEYJ 57 8 66 4 6150003821 LS 440 LF 7030003480 S ERJ3GEYJ 57 2 68 6 6200010090 S ELJND R82JF 79 5 15 5 7030003370 S ERJ3GEYJ 55 1 68 8 6200009560 S MLG1608B R10J T 93 5 25 3 7030003360 S ERJ3GEYJ 221 220 53 8 68 8 6200009560 S MLG1608B R10J T 93 5 28 9 7030001110 S MCR50JZHJ 68 680 80 4 55 8 6200003711 S NLV25T 2R7J 75 7 26 7030003680 S ERJ3GEYJ 104 100 k 68 8 54 2 6200012510 5 0 25 1 9 8TL 72 0N 77 2 30 7 7310005270 S RHOSADCJ2X 220 65 58 7 6200009560 S MLG1608B R10J T 80 6 36 2 7030003520 S ERJ3GEYJ 472 V 4 7 63 2 55 4 6200009560 S MLG1608B R10J T 86 5 34 8 7030003310 5 ERJ3GEYJ 61 5 58 3 6200009560 S MLG1608B R10J T 45 7 64 7030003560 S ERJ3GEYJ 63 5 61 7 6200009680 S MLG1608B 47NJ T 44 4 68 7030003480 S ERJ3GEY
18. 3001 IC6 LA4425A R KRC402 T 1 Seo 9a X001 n 1 10K TC7W66FU 20 R145 KRC404 KRC404 02 5 131 25 4226 IGND NJM4558M V D17 MA25077 KIA7805API LLOSZNW 10070 9 0 Qe 921 KTC4080 NJM4558M E N ALZ 25 4215 NIXIW NIOSO 100250 LAOX IW 1554 NIAI ava LnOTI4 Lod NITIA LT450EW KTA2015 2 2K R222 RC404 KTC4080 JTB450C24 25 4215 2015 R224 R44 25 4226 25 4226 KRC404 013 034 T SOGEDAH x HOGEDAH KTC4075
19. 52 3 26 8 53 6 26 8 53 4 35 5 62 9 23 7 65 23 7 59 8 41 3 57 44 3 55 9 37 7 10 4 50 2 5 7 55 7 11 8 56 2 5 7 58 6 30 65 8 37 64 9 32 2 60 3 22 2 54 8 25 3 55 5 22 1 51 9 39 4 25 7 40 7 25 7 6 6 53 17 6 51 9 11 6 46 5 18 9 48 9 11 6 45 11 6 43 6 11 6 42 3 34 4 34 35 1 25 7 36 8 25 7 36 4 35 2 41 5 38 7 50 6 24 2 60 4 24 3 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 4 AAAAAAAAAA 6510021721 30FLT SM2 TB LF SN 41 5 30 3 6510024601 S5B PH K S LF SN 8900012401 OPC 1264A lt TJM gt 7120000470 ERDS2TO 59 1 70 7 62 7 69 3 69 3 60 3 73 5 60 3 6510009381 B5B ZR LF SN 82 9 52 9 63 5 64 5 70 9 53 4 66 51 3 44 2 35 7 73 4 54 9 59 4 55 4 45 5 35 7 60 2 58 3 54 7 54 7 52 5 68 8 ORDER H V NO DESCRIPTION 7210003150 96 97 155 10 2685 LOCATION AAAAAAAAAAA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAN 6510009471 S3B ZR LF SN M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount 6 3 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY CHASSIS PARTS MAIN UNIT ORDER ORDER NO NO 6510004880 MR DSE 01 6510024601 S5B PH K S LF SN DESCRIPTION DESCRIPTION 8900012331 OPC 1258A 8900012401 OPC 1264A 7120000470 ERDS2TO 8010019302 2685 CHASSIS 2 8930061050 2685 R BUSH PLATE 8510015570 2685
20. 6 38 8 7 3 77 9 23 4 17 7 13 3 10 8 23 7 18 21 2 21 3 20 5 28 30 4 29 6 30 4 31 30 4 27 8 42 1 32 2 13 3 30 9 13 3 34 3 12 1 34 3 9 3 35 6 7 8 36 4 10 31 7 25 7 33 25 7 40 4 36 5 41 8 37 7 40 4 39 3 28 9 5 3 1580000540 3SK131 T2 LA 1580000540 3SK131 T2 LA 1530003950 S KTC4080 Y RTK P 1530003900 S KTC4075 BL RTK P 1530003900 S KTC4075 BL RTK P 1530003900 S KTC4075 BL RTK P 1530003900 KTC4075 BL RTK P 1590003580 KRC404 RTK P 1530002920 15 25 4226 1 R25 1530002920 15 25 4226 1 R25 1530002601 S 25 4215 TE85R F 1530002601 S 25 4215 TE85R F 1530002920 15 25 4226 1 R25 1590003580 S KRC404 RTK P 1590003580 S KRC404 RTK P 1590000670 5 FMW1 148 1590003680 5 KRC402 RTK P 1510001090 18 KTA2015Y RTK P 1590003580 S KRC404 RTK P 1530003950 S KTC4080 Y RTK P 1510001090 S KTA2015Y RTK P 1590003580 S KRC404 RTK P 1510001090 18 KTA2015Y RTK P 1590003580 S KRC404 RTK P 1520000840 KTA1664Y RTF P 1530003900 KTC4075 BL RTK P 100 4 35 82 4 12 9 59 6 15 4 37 9 40 2 4 1 38 1 5 1 32 7 85 8 28 2 66 4 31 9 72 2 37 4 72 4 31 6 82 38 1 84 6 36 4 47 3 61 3 54 5 60 4 55 2 57 60 4 63 1 61 3 55 4 55 5 66 3 32 9 26 1 81 7 33 3 28 1 65 9 30 60 5 20 57 19 8 51 6 4 6 49 4 6 1 45 5 AAAAAAAAAAAAAANAANAAAAAAAAAA 1710001081 L308CCB 1710001081 L308CCB 1750001190 KDV214E RTK P 1750001190 KDV214E RTK P 1750001190 KDV214E RTK P 1750001190 KDV214E RTK P 179000098
21. 6 PARTS LIST REPLACEMENT UNITS LOGIC UNIT ORDER NO UNIT NAME ORDER HIV NO DESCRIPTION LOCATION 0329890101 U M304 01 FRONT FRONT LOGIC VR SQL Black 4030006850 C1608 JB 1H 471K T 9 38 2 0329890201 U M304 02 FRONT FRONT LOGIC VR SQL 4030006860 C1608 JB 1H 102K T 41 8 13 3 Super White 4030006850 C1608 JB 1H 471K T 51 7 12 1 0329890301 U M304 03 FRONT FRONT LOGIC VR SQL Gray 0329890102 U M304 01 MAIN MAIN CHASSIS 6510021721 30FLT SM2 TB LF SN 48 3 8 2 6510015541 B4B ZR SM4 TF LF SN 18 5 5 8 5030002990 SDT DM2360 HP 0 LOGIC UNIT 5040002310 SML 311YTT86 13 5 13 7 ORDER H V 5040002310 SML 311YTT86 13 5 39 5 NO DESCRIPTION LOCATION 5040002310 SML 311YTT86 75 7 11 5 5040002310 SML 311YTT86 42 8 7 3 1140013950 S IC M37560MFA 347GP 53 33 5040003230 RY SP110UHY24 5M 79 8 42 5 1170000352 S IC PC357N6J000F 13 4 19 7 5040003230 RY SP110UHY24 5M 79 8 27 1130007431 S IC TC7S14FU TE85R F 13 7 25 2 1140008650 S IC 58 2464 29 2 35 7 1110005771 5 S 80942CNMC G9CT2G 30 2 42 1 1110002700 5 NJM2904M TE1 FMZB 29 3 9 2 8930054970 SRCN 2438 SP N W 1520000840 KTA1664Y RTF P 73 5 11 6 1530003900 S KTC4075 BL RTK P 68 5 6 8 1530003900 5 KTC4075 BL RTK P 68 2 9 7 1590001050 DTC114TUA T106 18 19 ORDER H V NO DESCRIPTION LOCATION 1750000550 155355 TE 17 16 15 4 1750000550 155355 TE 17 18 22 8 1750001180 KDS122 RTK P 20 9 18 3 1110003491
22. 79 5 24 7 77 7 26 2 75 2 28 5 74 2 28 6 65 6 37 5 64 7 35 8 73 2 28 3 63 6 38 2 65 6 41 4 75 4 38 4 75 4 35 3 71 4 35 74 3 33 3 75 4 37 5 73 3 33 7 79 9 38 84 4 38 2 84 9 34 6 86 6 37 4 93 7 42 2 52 58 2 50 9 67 2 48 3 66 1 48 3 64 49 6 64 44 4 64 45 2 66 45 5 71 8 49 9 71 1 539713 VR UNIT 54 73 65 3 73 ORDER H V NO DESCRIPTION LOCATION 57 8 70 7 7210003140 TP96N97N 15SK 10KA 2685 NO 4030007130 C1608 CH 1H 101J T 4030007130 C1608 CH 1H 101J T 4030006850 C1608 JB 1H 471K T 4030007050 C1608 CH 1H 220J T 4030007130 C1608 CH 1H 101J T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4510004591 16 ME 470 HC TS 4030011600 S C1608 JB 1E 104K T 4510004591 16 ME 470 HC TS 4030011600 C1608 JB 1E 104K T 4030006900 C1608 JB 1H 103K T 4030017490 C1608 JB 1A 105K T 4030006860 C1608 JB 1H 102K T 4030011810 C1608 JB 1A 224K T 4030006860 C1608 JB 1H 102K T 4030011600 C1608 JB 1E 104K T 4030011600 C1608 JB 1E 104K T 4030007140 C1608 CH 1H 121J T 4030011600 C1608 JB 1E 104K T 4510008540 EEE1CA100SR 4030011600 C1608 JB 1E 104K T 4510008540 EEE1CA100SR 4030006860 C1608 JB 1H 102K T 4030010770 C1608 JB 1H 392 4030007130 C1608 CH 1H 101J T 4030006850 C1608 JB 1H 471K T 4030017380 1 0508 4030017460 ECJOEB1E102K 4030017390 ECJOEC1H180J 4030017400 ECJOEC1H220J 4030017400 ECJOEC1H220J 4030006860
23. 8 7510001511 15 NTCG16 4LH 223JT 26 8 32 2 45 3 8 9 7030003580 S ERJ3GEYJ 153 V 1 28 1 32 2 55 1 10 5 7030003580 S ERJ3GEYJ 153 V 1 28 1 29 4 49 4 21 3 7310005030 S RHO3ADCS4X 47 47 5 39 5 9 1 42 8 7030003280 15 ERJ3GEYJ 22 3 32 7 10 39 5 7030003550 15 ERJ3GEYJ 20 9 35 9 37 5 8 9 7030003570 15 ERJ3GEYJ 20 3 34 6 40 3 10 3 7030003670 15 ERJ3GEYJ 20 3 33 3 40 3 8 9 7030003400 S ERJ3GEYJ 83 2 29 9 44 8 12 5 7030003660 S ERJ3GEYJ 83 6 32 6 48 7 19 1 7030003370 S ERJ3GEYJ 80 4 21 1 36 6 38 7030003230 S ERJ3GEYJ 77 8 19 8 34 5 37 3 7030003370 S ERJ3GEYJ 76 3 21 1 38 7 38 1 7030003280 S ERJ3GEYJ 75 7 18 3 40 8 43 2 7030003280 S ERJ3GEYJ 50 9 34 9 39 5 43 2 7030003480 S ERJ3GEYJ 60 4 25 9 35 6 43 2 7030003200 S ERJ3GEYJ 62 5 27 8 35 2 41 2 7030003480 S ERJ3GEYJ 64 7 27 1 12 35 6 7030003380 S ERJ3GEYJ 58 4 25 2 7 3 38 6 7030003380 S ERJ3GEYJ 59 1 37 7 7 5 42 8 7030003500 S ERJ3GEYJ 53 6 32 7 6 6 35 3 7030003560 15 ERJ3GEYJ 28 2 63 7 8 35 3 7030003480 S ERJ3GEYJ 28 2 62 4 4 36 1 7030003560 S ERJ3GEYJ 18 1 56 8 7 3 39 9 7030003440 15 ERJ3GEYJ 20 6 54 1 4 34 8 7030003510 S ERJ3GEYJ 3 1 46 2 3 2 32 5 7030003520 S ERJ3GEYJ 3 1 44 9 8 3 32 5 33 7 38 9 33 43 2 4010007630 HM60SJ CH 270J 500V 39 3 36 8 4010005420 HM60SJ CH 040C 500V 21 9 46 1 4010008050 HM60SJ CH 180J 500V 21 9 43 3 4010005790 RT HM60SK YB 102K 500V 19 9 42 5 4010007630 HM60SJ CH 270J 500V 40 1 34 9 4010008070 HM60SJ CH 220
24. CASE Black 8510018180 2685 CASE Super White 8510015690 2685 CASE B Gray 8930060440 2685 R PACKING 8930060451 2685 F PACKING 1 Black 8930060451 2685 F PACKING 1 Super White 8930061191 2685 F PACKING A 1 Gray 8930034300 1542 ANT SEAL 8930052440 2345 B IC CLIP 8510015560 2685 MODULE COVER 8930055070 2438 SHEET 8810008661 Screw BT BO 3X8 NI ZC3 BT 8810008201 Screw BTBO 2 6X6NI ZC3 BT 8810002950 Screw BiH M3X6 SUS 8810004540 Screw BiH M3X8 SUS 8810004700 Screw BT AO 3X16 SUS 8510018260 2989 MODULE PLATE 8510011111 1922 VCO CASE 1 8510011101 1922 VCO COVER 1 8510016170 2685 SHIELD PLATE 8930005320 Filter spacer Refer to SECTION 9 BOARD LAYOUTS SQL UNIT ORDER NO 7210003150 TP96N97 15SK 10KB 2685 DESCRIPTION 6510009471 S3B ZR LF SN ORDER FRONT UNIT NO ORDER 7210003140 TP96N97N 15SK 10KA 2685 NO 7070001220 3 9 ERX2SJ DESCRIPTION DESCRIPTION 6510009381 BEB ZR LF SN Optional product HM 164B Black Optional product HM 164SW Super White Optional product HM 164G Gray ORDER NO 8900009041 OPC 891A DESCRIPTION 2510001350 045P0806 7 1 b 7120000470 ERDS2TO 8900012412 OPC 1263B 8950005110 2289 MIC HANGER 8010017250 2040 MOBILE BRACKET Black 8010020710 2040 MOBILE BRACKET C Super White 8010019400
25. IC IC8 pin 2 via the buffer amplifier 026 Buffer D17 to transmitter circuit VCO Buffer gt to 1st mixer circuit D16 Buffer Loop IC PLL IC filter 8 Phase Programmable 2 mE m Prescaler detector counter 21 25 MHz signal to the 1 3 FM IF IC IC1 2 TB pin2 47 Programmable hift register 4 pc divider 1 5 x2 16 21 25 MHz E iti 4 4 DSC CIRCUITS 4 4 1 DSC ENCODE CIRCUIT LOGIC UNIT AND MAIN UNIT The DSC signal is created at the CPU IC1 pin 9 The signal passes through the buffer amplifier IC6A pins 1 3 and is then applied to the D A convertor 8176 8179 to convert into the analog signal The analog signal passes through the low pass filter MAIN unit IC10B pins 5 7 and is then applied to the VCO circuit to modulate the DSC signal 4 4 2 DSC DECODE CIRCUIT MAIN UNIT AND LOGIC UNIT The AF signal from the FM IF IC IC1 pin 9 are filtered at the low pass filter Q5 R52 R58 83 86 to suppress unwanted higher noise signals The filtered signals are converted analog signals into digital signals at the DSC decoder IC IC3 and are then applied to the CPU LOGIC UNIT pin 22 via the DSCDEC signal 4 5 LOGIC CIRCUITS LOGIC UNIT CPU IC1 is an 8 bit single chip micro computer and contains LCD driver serial I O timer A D converter programmable
26. PC357N6J000F 7 TC7S14FU 155355 Joo gt o Ble Nje e SQL UNIT 10k lt LS q q To W1 MAIN UNIT To W1 MAIN UNIT 06 15K DTC114TU R38 m w AO Al A2 VSS vec WP SCL SDA DSCDEC UNLK HN58X2464TI 11 1 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 P53 RTP1 P52 RTPO P51 PWM1 P50 PWMO PA7 SRDY1 P46 SCLK 1 P45 TXD P44 RXD P42 INT2 P41 INT1 P40 P77 P76 P75 P74 P73 P72 P71 P70 INTO RESET XCIN XCOUT XIN XOUT vss 101 M37560EFGP P27 P26 P25 P24 P23 P22 P21 P20 P17 P16 P15 SEG39 P14 SEG38 SEG13 SEG14 SEG15 SEG16 SEG17 P30 SEG18 P31 SEG19 P32 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 51 SDT DM2360 32 SEG12 SEG9 SEG8 29 SEG11 28 SEG10 31 30 25 SEG5 24 SEGA SEG3 COM2 COMO 23 21 19 18 17 512 59 58 511 527
27. ROM and RAM The CPU controls to display characters on the LCD too SYSTEM CLOCK CIRCUIT X1 is a ceramic oscillator and oscillate 7 9872 MHz system clock for the CPU IC1 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 transceiver turns power ON LOW BATTERY DETECTOR HVS voltage is divided by R14 and R15 and is applied to the low battery detector section in the CPU IC1 pin 1 DIMMER CIRCUIT CPU IC1 Q2 Q3 and Q4 compose dimmer circuit The circuit controls 4 steps LCD backlight 052 057 UART PORT IC M304 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 IC3 pin 2 The amplified signals are applied to the CPU IC1 pin 20 4 6 POWER SUPPLY CIRCUITS Description The voltage from the connected DC power supply Common 5V converted from the HV line at the L5V regulator LOGIC UNIT IC9 The converted voltage is applied to the CPU LOGIC UNIT IC1 Transmit 5V controlled by the T5 control circuit Q31 Q32 using the SEND signal from CPU LOGIC UNIT IC1 pin 52 Receive 8 V converted from the VCC line at the R8 regulator Q35 Q36 The converted voltage is applied to the receiver circuits Receive 5V controlled by the R5 control circuit Q33 Q34 using t
28. TA31136FNG D EL 50 2 15 6 1110003650 15 NJM2211M TE1 26 8 44 1 1150002172 S AV35A 1110003091 LA4425A E 1130009581 S TC7W66FU TE12L F 6 7 27 6 1130007611 S uPD3140GS E1 A 58 31 7 1180002780 KIA7805API U P 1110000960 NJM4558M TE1 19 3 27 3 6050012460 CR 834 SMD 49 7 9872 MHz 7030003530 ERJ3GEYJ 562 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003700 ERJ3GEYJ 154 V 7030003640 ERJ3GEYJ 473 V 7030003560 ERJ3GEYJ 103 V 7030003250 ERJ3GEYJ 270 V 7030003250 ERJ3GEYJ 270 V 7030003250 ERJ3GEYJ 270 V 7030003630 ERJSGEYJ 393 7030003640 ERJ3GEYJ 473 V 7030003440 ERJ3GEYJ 102 V 7030003570 ERJ3GEYJ 123 V 7030003500 ERJ3GEYJ 332 V 7030003440 ERJ3GEYJ 102 V 7030003440 ERJ3GEYJ 102 V 7030003390 ERJ3GEYJ 391 V 7030003360 ERJ3GEYJ 221 V 7030003540 ERJ3GEYJ 682 V 7030003580 ERJ3GEYJ 153 V 7030003440 ERJ3GEYJ 102 V 7030003340 ERJ3GEYJ 151 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003680 ERJ3GEYJ 104 V 7030003800 ERJ3GEYJ 105 V 7030003560 ERJ3GEYJ 103 V 7030003540 ERJ3GEYJ 682 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003680 ERJ3GEYJ 104 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003560 ERJ3GEYJ 103 V 7030003800 ERJ3GEYJ 105 V 7030003860 ERJ3GE JPW V 63 4 22 9 60 6 22 9 60 6 21 6 63 4 21 6 61 4 11 9 61 4 13 2 49 9 16 1 65 5 9 4 65 5 10 7 65 5 12 65 5 6 8 65 5 5 5 65 5 8 1 70 2 9 8 67 5 12 6 15 9 42
29. 0 MA742 TX 1750000471 155321 TE85L F 1790001260 MA2S077 TX 1790001260 MA2S077 TX 1750000711 HVC350BTRF E 1750000711 HVC350BTRF E 1790001260 MA2S077 TX 1790001260 MA2S077 TX 1790000691 HSM88ASRTR E 1790000691 HSM88ASRTR E 1790000700 DSAS3A1 1750001180 KDS122 RTK P 107 2 39 4 99 9 29 3 102 5 12 99 1 12 63 9 15 5 53 20 1 66 1 34 1 73 3 26 8 76 8 33 5 75 5 33 5 92 1 37 1 92 1 40 6 69 3 57 2 73 5 57 2 UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ UJ J UJ UJ UJ UJ UJ UJ UJ UJ UJ D J UJ 60 8 4 4 62 1 4 4 49 9 13 5 49 9 14 8 66 8 26 4 16 1 20 3 61 4 10 3 67 22 9 63 5 12 5 65 5 13 3 70 2 12 6 17 9 15 7 16 8 24 4 26 6 28 9 26 5 42 1 23 5 32 7 30 44 5 25 2 42 1 29 14 43 5 40 1 42 1 41 1 9 6 9 4030006900 C1608 JB 1H 103K T 4030006850 C1608 JB 1H 471K T 4030006900 C1608 JB 1H 103K T 4030006850 C1608 JB 1H 471K T 4030006900 C1608 JB 1H 103K T 4030011600 C1608 JB 1E 104K T 4030006900 C1608 JB 1H 103K T 4030006900 C1608 JB 1H 103K T 4030006860 C1608 JB 1H 102K T 4030006900 C1608 JB 1H 103K T 4030006860 C1608 JB 1H 102K T 4030006880 C1608 JB 1H 472 4030006900 C1608 JB 1H 103K T 4030006900 C1608 JB 1H 103K T 4030017480 C1608 JB 1A 474K T 4510008570 EEE1CA220SR 4030008890 C1608 JB 1H 273K T 4030006900 C1608 JB 1H 103K T 4030006860 C1608 JB 1H 102K T 4030009650 C1608 CH 1H 240J T 4030007050 C1608 CH 1H 220J T 4030006850 C1608 JB 1H 471K T AAAAAAAAAAAAAA 32 2 34
30. 1608 CH 1H 151J T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030007090 C1608 CH 1H 470J T 4030006860 C1608 JB 1H 102K T 4030007010 C1608 CH 1H 100D T 4030007010 C1608 CH 1H 100D T 4030009920 C1608 CH 1H 050B T 4030007130 C1608 CH 1H 101J T 4550007090 TEESVA 1A 226M8R 4030006850 C1608 JB 1H 471K T 4030006850 C1608 JB 1H 471K T 4030007130 C1608 CH 1H 101J T 4030006860 C1608 JB 1H 102K T 4510008570 EEE1CA220SR 4010008070 HM60SJ 220 500V 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4010005430 HM60SJ 050C 500V 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030006900 C1608 JB 1H 103K T 4030006860 C1608 JB 1H 102K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030006850 C1608 JB 1H 471K T 4030006900 C1608 JB 1H 103K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T LOCATION 100 3 38 7 91 6 26 5 92 1 32 1 86 6 15 8 77 9 15 3 76 6 15 3 82 4 16 1 81 1 16 1 70 1 17 12 4 16 4 67 10 2 61 9 15 4 61 3 18 2 55 8 18 55 4 20 2 69 7 20 55 1 16 46 1 10 9 43 2 9 7 55 1 13 3 45 21 7 44 1 17 6 42 8 17 6 41 5 17 6 41 8 11 9 41 8 13 2 37 5 10 3 44 6 14 5 53 6 29 6 95 1 33 2 17 5 37 7 40 5 41 1 36 9 43 2 38 2 43 2 34 3 43 2 12 8 37 6 11 2 32 3 10 5 34 3 7 3 37 3 3 3 41 8 7 32 5 1 9 32 5 9 8 31 5 32 4 41 2 20 1 40 3 25 5 50 20 6 47 5 20 6 44 7 31 7 43 2 26 9 36 4 30 9 38 9 85 32 6 83 2 26 3 85 2 25 1
31. 2040 MOBILE BRACKET B Gray 8610010561 2040 KNOB BOLT 1 Black 8610011260 2040 KNOB BOLT B 1 Super White 8820001271 2040 KNOB BOLT C 1 Gray 8810004700 Screw BT A0 3X16 SUS 8810001490 Screw BT A0 5X20 SUS 8850000180 Flat washer M5 SUS 8850000500 S washer M5 SUS 8310050900 2438 warning sticker 8210023510 2989 FRONT PANEL Black 8210023520 2989 FRONT PANEL Super White 8210023670 2989 FRONT PANEL Gray 8930071270 2989 KEY BOARD 8310068590 2989 WINDOW PLATE 8610011370 KNOB N 312 Black 8610012140 KNOB N 312 C Super White 8610011640 KNOB N 312 B Gray 8930014280 Speaker net FX 706 8810010021 Screw BTBO 2 6X8NI ZC3 BT 8930052010 2345 SHAFT 8930060481 2685 SPRING 1 8110008990 2989 D COVER 8930060470 2685 SHAFT ANGLE 8930060490 2685 F BUSH PLATE 8930052280 O ring AC 8930055841 2490 EARTH SPRING 1 For mounting bracket MP3 eh S amp aki LOGIC UNIT ORDER NO 5030002990 01 0 2360 0 DESCRIPTION 8930054970 SRCN 2438 SP N W 8210017700 2438 REFLECTOR 8930054650 2438 LCD HOLDER 8930055060 2438 WHITE SHEET Screw abbreviations A BT Self tapping PH head ZK Black NI ZU Nickel Zinc SUS Stainless 7 1 MP16 C
32. C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4550007260 F931C475MAABMA 4030011600 C1608 JB 1E 104K T 4030006900 C1608 JB 1H 103K T 4030006860 C1608 JB 1H 102K T 4550003260 TEESVA 1V 684M8R 4550002980 TEESVA 1C 225M8R 4610001590 TZC3R100A110R00 4030007020 C1608 CH 1H 120J T 4030007040 C1608 CH 1H 180J T 4510008540 EEE1CA100SR 4030011600 C1608 JB 1E 104 4510008540 EEE1CA100SR 4030011600 C1608 JB 1E 104K T 4030006860 C1608 JB 1H 102K T 4510008540 EEE1CA100SR 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4510008540 EEE1CA100SR 4030006850 C1608 JB 1H 471K T 4030006850 C1608 JB 1H 471K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030007090 C1608 CH 1H 470J T 4030006850 C1608 JB 1H 471K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030007090 C1608 CH 1H 470J T 4030007090 C1608 CH 1H 470J T 4030006850 C1608 JB 1H 471K T 4030006850 C1608 JB 1H 471K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030007090 C1608 CH 1H 470J T 4030006900 C1608 JB 1H 103 LOCATION 41 3 70 7 26 1 60 9 26 1 59 6 34 3 58 8 35 6 58 8 36 9 58 8 15 9 20 5 13 8 16 4 42 25 7 28 7 17 1 4 4 72 7 16 1 65 5 29 6 29 3 4 7 62 3 3 9 65 6 4 3 28 4 9 1 26 2 6 4 23 2 15 5 33 9 17 5 32 21 9 30 7 3 1 21 8 15 23 9 10 9 21 7 24 7 28 7 24 7 25 8 21 9 23 9 45 1 40 4 82 5 35 6 79 9 33 8 81 4 29 8 81 5 28 5 80 7 26 3 75 19 8 78 5 18 3 52 5 38
33. C1608 JB 1H 103K T 4030011600 C1608 JB 1 104 4030007170 C1608 CH 1H 221J T 4030007170 C1608 CH 1H 221J T 4030011600 C1608 JB 1E 104K T 4030011600 C1608 JB 1E 104K T 4030006860 C1608 JB 1H 102K T 4030006860 C1608 JB 1H 102K T 4030011600 C1608 JB 1E 104K T 4030009880 C1608 JB 1H 682K T 4030008880 C1608 JB 1H 223K T 4030006870 C1608 JB 1H 222K T 4030009880 C1608 JB 1H 682K T 4030011600 C1608 JB 1E 104K T 403001 1600 C1608 JB 1E 104K T 4030008880 C1608 JB 1H 223K T 4030008880 C1608 JB 1H 223K T 4510008540 EEE1CA100SR 4030006870 C1608 JB 1H 222K T 4030010040 C1608 JB 1H 561K T 4030017490 C1608 JB 1A 105K T 4030006900 C1608 JB 1H 103K T 4340000310 ECHU 1C 333JX5 4030011600 C1608 JB 1E 104K T 4030006870 C1608 JB 1H 222K T 4030006900 C1608 JB 1H 103K T 4030011810 C1608 JB 1A 224K T 4510008540 EEE1CA100SR 4030011600 C1608 JB 1E 104K T 4030006900 C1608 JB 1H 103K T 4550007520 F931A106MAABMA 4030017460 ECJOEB1E102K 4550000530 TEESVA 1V 104M8R 4030017460 ECJOEB1E102K 4030017500 ECJOEC1H560J 4030017420 ECJOEC1H470J 4030006850 C1608 JB 1H 471K T 4550007520 F931A106MAABMA 4030017460 ECJOEB1E102K 4030006860 C1608 JB 1H 102K T 4030017490 C1608 JB 1A 105K T 4030017460 ECJOEB1E102K 4030017550 ECJOEC1H1R5B 4030017460 ECJOEB1E102K 4030017550 ECJOEC1H1R5B 4030017540 ECJOEC1HR75B 4030017460 ECJOEB1E102K 4030016790 ECJOEB1C103K 4030017580 ECJOEC1HO060C 4030017460 ECJOEB1E102K 4030017400 ECJOEC1H220J 4030006860 C1608 JB 1H 102K T 4030007150 C
34. 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 2nd IF filter 450 kHz C73 C74 21 25 MHz lu 1 17 16 C75 4 3 2 PLL IC QLV signal to the R1 Noise IC8 onthe QL board detector P KEN Limiter 4 WXDEC signal to the amp CPU LOGIC board X2 21 25 MHz D CDEC signal to the 1 TA3113 CPU LOGIC board IC1 16 Peer C67 5 2 DEC E 2 from the IF Ambi 04 QL signal to the CPU AF mute switch 127 ser __ 5 LOGIC board 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 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 Band pass filter Q6 Q7 R62 R70 90 94 to suppress unwanted lower noise signals 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
35. H90 H70 75 H80 H85 gt H65 H60 SS 55 H25 H30 H35 H40 H45 H50 r F 7 9 10 H15 H20 H5 H LINN NIVIN tO P 5 ttt ttt tt ttt h n STA SEN OEA SEA STA HO SA OTA A OSA SOA OLA GLA 08A SECTION 10 BLOCK DIAGRAM FRONT UNIT HM 164B SW G Q5 KTC4075 Frequency range LPF TX 156 025 157 425MHz 156 050 163 275 2 LOGIC UNIT External GPS DS1 SDT DM2360 LCD K Q2 KTA1664 93 4 4075 DIM K CTRL Q6 DTC114TU D3 KDS122 VE lt hb VR UNIT IC6 LA4425A lt IC3 NJM2211M DSCDEC DSC DECODER 1C7B TC7W66FU QI AF MUTE lt ZN ICtTAS1196FN _ FI3 LTA50EW CERAMIC BPF 2ND IF AMP X1 CR 834 1 T7 9872MH2 1 5 5 80942 RESET IC4 HN58X2464TI ED EEPROM IC2 PC357N6 D1 1SS355 IC3 TC7S14FU D2 1SS355 PHOTO COUPLE IC6A NJM2904M 1C6B NJM2904M DSCENC 1C10A TC7W66FU NJM4558M MIC MUTE h IDC D25 DSA3A1 REVERSE CONNECT HV PRO
36. IC BOARD 5 pins 1 3 While receiving Outputs tuning signal as BPFV to the tunable BPFs D25 D28 via buffer amplifier LOGIC BOARD 5 pins 5 7 SECTION 5 ADJUSTMENT PROCEDURE 5 1 PREPARATION REQUIRED TEST EQUIPMENTS EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE DC power supply Output voltage Current capacity 13 8 V DC More than 10 A DC voltmeter Input impedance 50 DC or more RF power meter terminated type Measuring range Frequency range Impedance SWR 0 1 30 W 100 300 MHz 50 Q Less than 1 2 1 Standard signal generator SSG Frequency range 0 1 300 MHz Output level 0 1 pV to 32 mV 127 to 17 dBm Frequency counter Frequency range 0 1 300 MHz Frequency accuracy 1 ppm or better Sensitivity 100 mV or better AC millivoltmeter Measuring range 10 mV to 10 V FM deviation meter 30 300 MHz 0 to 10 kHz Frequency range Measuring range Input impedance External speaker Capacity 40 More than 5 W Audio generator 300 3000 Hz 1 500 mV Frequency range Output level CONNECTIONS Attenuator Capacity Standard signal generator 0 1 uV to 32 mV 127 dBm to 17 dBm CAUTION DO NOT transmit while the SSG is connected to the antenna connector RF power meter 0 1 30 W 50 Q Frequency
37. J 500V 19 1 44 7 4030006990 S C1608 CH 1H 080D T 85 8 30 2 4030007010 15 C1608 CH 1H 100D T 85 7 26 3 4030009510 S C1608 CH 1H 010B T 73 1 24 3 4030006980 S C1608 CH 1H 070D T 75 7 23 7 4030009920 S C1608 CH 1H 050B T 73 1 25 5 4030011600 S C1608 JB 1E 104K T 67 1 28 9 4030006900 S C1608 JB 1H 103K T 62 3 41 4030006860 S C1608 JB 1H 102K T 62 3 38 2 4030006860 S C1608 JB 1H 102K T 65 6 38 8 4030011600 S C1608 JB 1E 104K T 65 6 40 1 4030009350 S C1608 CH 1H 3R5B T 75 3 39 6 4030006980 S C1608 CH 1H 070D T 72 4 39 6 4030009530 S C1608 CH 1H 030B T 74 8 36 4 4030009350 S C1608 CH 1H 3R5B T 73 1 35 1 4030009910 S C1608 CH 1H 040B T 72 2 29 7 4030006980 S C1608 CH 1H 070D T 77 4 38 5 4030006860 S C1608 JB 1H 102K T 78 7 38 5 4030011600 S C1608 JB 1E 104K T 86 5 32 2 4030009500 S C1608 CH 1H 0R5B T 84 6 39 4 4030009520 S C1608 CH 1H 020B T 93 7 39 1 4030006980 S C1608 CH 1H 070D T 53 1 63 4030009350 S C1608 CH 1H 3R5B T 92 9 44 3 4030009910 S C1608 CH 1H 040B T 48 8 67 4 4030006850 S C1608 JB 1H 471K T 444444444 7030003680 5 ERJ3GEYJ 104 V 1 7030003630 S 393 V 3 7030003640 S 473 V 4 7030003410 S ERJ3GEYJ 561 V 5 7030004050 S ERJ3GEYJ 1R0 V 1 7030003680 S ERJ3GEYJ 104 V 7030003260 S ERJ3GEYJ 330 V 33 7030003680 S ERJ3GEYJ 104 V 100 k 00 9 7k 60 100 k 33 1 7030003680
38. J 63 5 63 6110001670 LA 253 7030003560 S ERJ3GEYJ 59 4 60 3 6170000230 LW 25 7030003560 S ERJ3GEYJ 58 63 6 6200009560 S MLG1608B R10J T 81 6 31 2 7030003500 S ERJ3GEYJ 58 9 58 3 6200009620 S MLG1608B 68NJ T 80 8 27 4 7030003240 S ERJ3GEYJ 57 4 59 6 7030003470 S ERJ3GEYJ 67 2 62 5 7030003470 S ERJ3GEYJ 67 2 61 1 100 3 42 4 7030003470 S ERJ3GEYJ 75 6 62 5 100 3 37 4 7030003470 S ERJ3GEYJ 75 6 61 1 98 37 1 7030003320 S ERJ3GEYJ 18 5 20 5 107 34 7 7030000100 S MCR10EZHJ 4 7 16 5 63 9 100 8 32 3 7030003580 15 ERJ3GEYJ 31 1 31 103 5 36 2 7030003450 15 ERJ3GEYJ 31 1 28 106 2 36 8 7030003800 S ERJ3GEYJ 16 7 45 3 97 4 27 6 7030003600 S ERJ3GEYJ 5 2 65 6 102 8 14 2 7030003560 S ERJ3GEYJ 17 6 48 9 100 8 14 2 7030004050 S ERJ3GEYJ 5 2 68 4 61 9 20 6 7030004050 S ERJ3GEYJ 3 9 68 4 100 3 40 3 7030003800 15 ERJ3GEYJ 3 6 26 1 85 8 14 5 7030003800 S ERJ3GEYJ 9 9 28 1 86 6 13 2 7030003800 S ERJ3GEYJ 7 8 23 2 83 8 16 1 7030003490 15 ERJ3GEYJ 22 5 20 5 86 6 19 4 7030003640 S ERJ3GEYJ 13 3 25 8 83 7 18 1 7030003340 15 ERJ3GEYJ 17 5 34 6 75 3 15 3 7030003680 S ERJ3GEYJ 17 5 33 3 79 2 12 7030003560 15 ERJ3GEYJ 15 5 31 2 57 7 12 7 7030010310 5 ERJ3GEYF 223 17 5 30 7 60 18 2 7030010290 5 ERJ3GEYF 273 24 7 31 3 63 9 19 7030003660 S ERJ3GEYJ 24 7 30 58 7 18 2 7030003670 15 ERJ3GEYJ 24 7 27 1 93 7 36 1 7030003670 15 ERJ3GEYJ 24 7 23 9 93 7 33 3 7030003610 S ERJ3GEYJ 24 7 32 6 50 7 19
39. O010 2260002790 SKHHAMAO10 2260002790 SKHHAMAO10 2260002790 SKHHAMAO10 8210023240 2995 FRONT PANEL Black 8210023250 2995 FRONT PANEL A Super White 8210023660 2995 FRONT PANEL B Gray 8210020120 2715 REAR PANEL Black 8210021240 2715 REAR PANEL C Super White 8210020380 2715 REAR PANEL B Gray 8930060910 2715 KEY Black Super White 8930061150 2715 KEY A Gray 8930060920 2715 PTT RUBBER Black Super White 8930061160 2715 PTT RUBBER A Gray 8930061970 2715 A PTT HOLDER 8930060940 2715 RUBBER Black Super White 8930061810 2715 RUBBER A Gray 8930060930 2715 MAIN SEAL 8610011600 2715 HANGER KNOB 8930060951 2715 BUSH PLATE 1 8930060990 2715 MIC SHEET 8930061000 2715 MIC TAPE 8930070800 2715 VENT SHEET 8930060960 O RING AY 8930060970 O RING AZ 8820001260 2715 SCREW 2 6X18 SUS 8810010230 Screw BiH M4X8 ZK 8850002000 SPRING WASHER M4 SUS 8810010240 Screw BT BO 2X6NI 8930061700 2715 PTT PLATE Screw abbreviations A BO BT Self tapping PH Pan head ZK Black NI ZU Nickel Zinc SUS Stainless 9027150010 71 98 010 X98 X98 9027150010 71 98 010 98 98 M Mounted side Mounted on the Top side Mounted the Bottom side S Surface mount UNIT mm inch SE EXPLODED VIEW 15 5 MP4 C MAIN UNIT M
40. P3 C N 5 MP7 C MP1 C 12 1 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 www icomamerica com E mail sales 9 icomamerica com Customer Service Phone 1 425 454 7619 Icom Canada Glenwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com Icom Australia Pty Ltd Unit 1 103 Garden Road Clayton VIC 3168 Australia Phone 61 03 9549 7500 Fax 61 03 9549 7505 URL http www icom net au E mail sales 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 E mail inquiries icom co nz Fax 64 09 274 4708 Beijing Icom Ltd Room C01 10th Floor Long Silver Mansion No 88 Yong Ding Road Haidian District Beijing 100039 China Phone 86 010 5889 4250 Fax 86 010 5889 4250 URL http Awww bjicom com E mail bjicom 9 bjicom com Icom Europe GmbH Communication Equipment Himmelgeister Str 100 D 40225 D sseldorf Germany Phone 49 0211 346047 Fax 49 0211 333639 URL http
41. S ERJ3GEYJ 104 100 7030003680 S ERJ3GEYJ 104 V 100 k 7030003860 S ERJ3GE JPW V 7030003320 S ERJ3GEYJ 101 V 100 7030003820 S ERJ3GEYJ 155 V 1 5 M 7030003640 S ERJ3GEYJ 473 V 47 k 7030003600 S ERJSGEYJ 223 V 22 k 7030003560 S ERJ3GEYJ 103 V 10 k 7030003200 S ERJ3GEYJ 100 V 7030003540 S ERJ3GEYJ 682 V 7030003450 S ERJ3GEYJ 122 V 7030003450 S ERJ3GEYJ 122 V 7030003680 S ERJ3GEYJ 104 V 7030003460 S ERJ3GEYJ 152 V 7030003400 S ERJ3GEYJ 471 V x 2 0 0 8k 2k 2k 00 k k 0 k 0 k 0 5k 0 k k 7030003480 S ERJ3GEYJ 222 V 7030003400 S ERJ3GEYJ 471 V 7030003660 S ERJ3GEYJ 683 V 7030003400 S ERJ3GEYJ 471 V 7030003460 S ERJ3GEYJ 152 V 7030003390 S ERJ3GEYJ 391 V 7030003560 S ERJ3GEYJ 103 V 10 7030003450 S 122 V 1 2 7510001671 S NTCG16 4BH 103JT 7030003640 S ERJ3GEYJ 473 V 47 k 7030003440 S ERJ3GEYJ 102 V 1 k 7030003730 S ERJ3GEYJ 274 V 270 k 7030003460 S ERJ3GEYJ 152 V 1 5 7030003590 S ERJ3GEYJ 183 V 7030003620 S ERJ3GEYJ 333 V 7030003560 S ERJ3GEYJ 103 V 7030003560 S ERJ3GEYJ 103 V 7030003560 S ERJ3GEYJ 103 V 7030003440 S ERJ3GEYJ 102 V 7030003560 S ERJ3GEYJ 103 V 7030003600 S ERJ3GEYJ 223 V 7030003580 S ERJ3GEYJ 153 V 7030003400 S ERJ3GEYJ 471 V SEES
42. TECT Q31 KTA2015 1C9 KIA7805API Q32 KRC404 108 NJM4558M HVS 5 5 gt REG gt CTRL Q33 KTA2015 Q34 KRC404 15 y R5 gt CTRL Q35 KTA1664 Q36 KTC4075 R8 Ri REG gt ph X2 CR 804A Q4 KTC4080 D8 MA742 FL 368 FI2 FL 399A D16 17 MA2S077X2 Q2 3SK131 TX RX 21 25 2 CES Q13 14 2SC4226x2 D13 14 HVC350Bx2 10 a Bi vco DEV ADJ Q12 KRC404 D11 12 MA2S077X2 sw Q26 KTC4080 VCO Frequency range TX 156 025 157 425MHz RX 134 350 141 575MHz MAIN UNIT KDV214Ex3 Q1 3SK131 E Q17 28C4226 D1 D2 L308CCBx2 BPF ke ANT sw D4 KDV214E IC4 S AV35A I F RX LINE TX LINE 021 22 HSM88ASR COMMON LINE DATA BUS RFOUT gt DET Q21 FMW1 Q23 KTA201 9 PWR Adj Q22 KRC402 APC CTRL PWR CTRL Q19 20 KRC404 TX MUT CTRL SECTION 11 LOGIC UNIT VOLTAGE DIAGRAM DIM MAX 12 27V RY SP110UHY24 SML 311YT SML 311YT RY SP110UHY24 1K SML 311YT SML 311YT 390 1K 14 1664 KTC4075 Ic2 155355 22 WT B4B ZR SM4 TF UNIT 10k ne
43. ae counter o Attenuator deviation meter 40 dB SAN Speaker Gray Speaker Red Positive 7 Black Negative Power attenuation 40 dB More than 30 W SINAD meter Speaker 4 Q Power supply 13 8 V 10 A 5 2 FREQUENCY ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE LOCK VOLTAGE Verify 1 Channel 16 156 800 MHz Receiving Connect a DC voltmeter to the check point LV 2 Channel CH16 156 800 MHz Output power Low Connect a power meter to the ant enna connector Transmitting 1 3 2 3 Verify 1 4 2 4V Verify REFERENCE FREQUENCY Channel CH16 156 800 MHz Output power Low Connect a power meter to the ant enna connector Transmitting 1 Loosely couple a frequency counter to the ant enna connector 2 Adjust C257 REF ADJUST amp CHECK POINTS LOCATION FREQUENCY E 25 B6661A 6 C57 REF LV RECEIVE SENSITIVITY LOCK VOLTAGE ADJUSTMENT POINT CHECK POINT 156 800 MHz 5 3 TRANSMIT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION TRANSMIT 1 Channel CH16 156 800 MHz Adjust R135 PWR OUTPUT Output power High POWER Connect an RF power meter to the ant e
44. are applied to the AF power amplifier IC6 pin 1 The output signal from IC6 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 IC1 pin 8 The active filter section amplifies and filters noise components The filtered signals are applied to the noise detector section and output from pin 13 as the SQL signal The 501 signal is applied to the CPU LOGIC board pin 30 The CPU analyzes the noise condition and outputs the signal to toggle the AF mute switches IC7B AF CIRCUITS External SP HVS y AF Amplifier 1 i ce T 1 Internal SP FRO T 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 IC10A via the analog switch IC7A pins 1 2 A capacitor C223 and resistor R171 are connected to the amplifier to obtain the pre emphasis characterist
45. 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 signal generated at the PLL circuit using the reference frequency 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 suppressed and is then applied to the 2nd IF limiter amplifier in IC1 pin 5 The signal is applied to the FM detector section in IC1 for demodulation into AF signals The FM detector circuit employs a quadrature detection method linear phase detection which uses a ceramic discriminator X1 for phase delay to obtain a non adjusting circuit The detected signal from IC1 pin 9 is applied to the AF circuit 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 M304 emits beep tones and indicates flashing 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 Q5 R52 R58 C83 C86 via the DET signal and are then applied to A
46. cted from its power source 3 DO NOT force any of the variable components Turn them slowly and smoothly 4 DO NOT short any circuits or electronic parts An insulated tuning tool MUST be used for all adjustments 5 DO NOT keep power ON for a long time when the transceiver is defective 6 DO NOT transmit power into a signal generator or a sweep generator 7 ALWAYS connect a 50 dB to 60 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment 8 READ the instructions of test equipment thoroughly before connecting equipment to the transceiver Icom Icom Inc and logo are registered trademarks of Icom Incorporated Japan in the United States the United Kingdom Germany France Spain Russia and or other countries SECTION 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 5 1 5 2 5 3 5 4 10 11 11 1 11 2 12 CONTENTS SPECIFICATIONS INSIDE VIEWS DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPITON RECEIVER CIRCUITS rn ch tue ee e bsa TRANSMITTER CIRCUITS m gee ee is Gee kuq Waa re PLL CIRCUITS ADJUSTMENT PROCEDURES PREPARATION RECEIVE ADJUSTMENT PARTS LIST MECHANICAL PARTS AND DISASSEMBLY SEMICONDUCTOR INFORMATION BOARD LAYOUTS BLOCK DIAGRAM VOLTAGE DIAGRAM
47. he RCV signal from CPU LOGIC UNIT IC1 pin 53 The controlled voltage is applied to the receiver circuits 4 7 CPU PORT ALLOCATIONS Port name Description Input port for keys on HM 150B SW Approx 2 02 A key is pushed Approx 3 00 key is pushed Approx 3 84 V H L key is pushed Input port for transmit detected voltage Input port for low battery detecting Input port for NOISE signal from the squelch amplifier IC11 pin 4 Input port for squelch adjustment pot SQL BOARD R1 Input port for weather alert signal from the LPF Q38 Outputs data signal to the PLL IC IC1 pin 5 Outputs clock signal to the PLL IC IC1 pin 4 EVDATA EVCK Outputs strobe signal to the PLL IC IC1 pin3 Outputs volume control signal to the volume ccontroller C13 5 for PA circuit Outputs clock signal to the volume ccontroller 13 pin 4 for PA circuit DSDEC Input port for the DSC decode signal from the DSC decoder IC15 pin 7 CONT1 CONTO Output LCD contrast adjust signal to the CPU IC1 pin 134 COMTXD Outputs serial data signal to the connected HM 157 Optional product COMRXD Input port for the serial data signal from the connected HM 157 Optional product ECK Outputs clock signal to the EEPROM LOGIC BOARD IC4 pin 6 EDATA port for the EEPROM LOGIC BOARD IC4 5 control data
48. ics The amplified signals are applied to the IDC amplifier and are passed through the splatter filter IC10B pins 5 7 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 IC10B 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 signal to a level needed at the power amplifier The VCO output is buffer amplified by 015 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 YGR Q17 amplifiers to obtain an approximate 10 mW signal level The amplified signal is then applied to the RF power amplifier 4 4 2 4 POWER AMPLIFIER CIRCUIT MAIN UNIT The power amplifier circuit amplifies the driver signal to an output power level 4 is a power module which has amplification output capabilities of about 25 W with 10 mW input The output from 1 4 pin 4 is passed through the antenna switching circuit D1 and is then applied to the antenna connector via the low pass f
49. ignals are then applied to the RF circuit via the antenna switching circuit D2 4 1 2 RF CIRCUIT MAIN UNIT The RF circuit amplifies signals within the range of frequency coverage and filters out of band signals The signals from the antenna switching circuit pass through a tunable bandpass filter D4 16 12 16 where the object signals are led to the RF amplifier circuit Q1 The amplified signals at 1 17 19 are applied to other tunable bandpass filter 05 07 22 26 C29 C34 to suppress unwanted signals and improve the selectivity The signals 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 frequency 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 signals at the 1st mixer circuit Q2 to produce a 21 7 MHz ist IF signal The 1st IF signal is applied to two crystal filters Fl2 to suppress out of band signals and is then amplified at the IF amplifier Q4 The amplified signal is applied to the 2nd mixer circuit IC1 2ND IF CIRCUITS 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
50. ilter de emphasis circuit AW 1 4 i The detected signal from 4 2 5 APC CIRCUIT MAIN UNIT The APC circuit stabilizes transmit output power The RF output signal from the power amplifier 104 is detected at the power detector circuit D21 D22 L31 and is then applied to one of the differential amplifier inputs Q21 pin 3 via the High Low control circuit Q22 R137 The APC CIRCUIT RF signal from PLL Power module 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 tothe antenna IC4 Eee pee a i TXD T signal to the CPU OTS TMUT signal from the CPU LOGIC board IC1 pin 51 LOGIC board 121 2 APC control circuit 5 4 3 PLL CIRCUITS 4 3 1 GENERAL MAIN UNIT The PLL circuit provides stable oscillation of the transmit frequency and receive 1st LO frequency The PLL circuit compares the phase of the divided VCO frequency to the reference 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 programmable counter programmable divider phase detector charge pump etc The PLL circuit
51. nna connector Transmitting DEVIATION Channel CH16 156 800 MHz Adjust R184 DEV e Output power Low Connect an audio generator to the MIC line see the picture below and set as Frequency 1 kHz Level 140 mV e Connect an FM deviation meter to the ant enna connector through an attenuator and set as HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 Transmitting ADJUST amp CHECK POINTS LOCATION TRANSMIT R135 PWR TRANSMIT OUTPUT POWER ADJUSTMENT POINT R184 DEV DEVIATION ADJUSTMENT POINT Audio generator AC millivoltmeter 5 4 RECEIVE ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION CONNECTION VALUE RECEIVE 1 Channel CH16 156 800 MHz 1 Connect a DC voltmeter to the check point RSSI Maximum SENSITIVITY SQUELCH Open 2 Adjust in sequence L6 L7 L8 and L9 voltage Max counterclockwise Repeate the adjustment at least twice Connect an external speaker to the EXT SP lead receptacle Connect an SSG to the antenna connector and set as Frequency 156 800 MHz Level 0 107 dBm Modulation 1 kHz Deviation x3 0 kHz Receiving The output level of the standard signal generator SSG is indicated as the SSG s open circuit ADJUST amp CHECK POINTS LOCATION RECEIVE RECEIVE SENSITIVITY ADJUSTMENT POINTS RSSI RECEIVE SENSITIVITY CHECK POINT SECTION
52. using a one chip PLL IC MAIN unit 8 directly generates the transmit frequency and receive 1st IF frequency with VCO 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 is oscillated at X2 MAIN unit PLL CIRCUITS R13 R133 O H L 4 3 2 TX AND RX LOOP MAIN UNIT The generated signal at the VCO 013 014 011 D14 enters the PLL IC IC8 pin 2 and is divided at the programmable divider section and is then applied to the phase detector section The phase detector compares the input signal with a reference 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 4 3 4 VCO CIRCUIT MAIN UNIT The VCO outputs from Q13 Q14 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 YGR amplifier Q17 A portion of the VCO output is reapplied to the PLL
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