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Icom IC-M401EURO Service Manual

Other manuals for IC-M401EURO: Instruction Manual
Manual is about: vhf

Summary of IC-M401EURO

  • Page 1

    Service manual vhf marine transceiver 1-1-32, kamiminami, hirano-ku, osaka, 547-0003, japan s-13808iz-c1m © 2001 icom inc..

  • Page 2

    Introduction danger this service manual describes the latest service information for the ic-m401euro vhf marine transceiver at the time of publication. 2 versions of the ic-m401euro have been designed. This service manual covers each version. Model version color ordering parts be sure to include the...

  • Page 3

    Section 1 specifications section 2 inside views section 3 disassembly instructions section 4 circuit description 4-1 receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 4-2 transmitter circuits . . . . . . . . . . . . . . . ....

  • Page 4: Section 1 Specifications

    Section 1 specifications 1 - 1 ‘ ‘ general • frequency coverage : 156.025–157.425 mhz (tx) 156.300–162.025 mhz (rx) • mode : 16k0g3e (fm) • power supply requirement : 13.8 v dc (negative ground) • usable temperature range : –20˚c to +60˚c; –4˚f to +140˚f • frequency stability : ±10 ppm (–20˚c to +60...

  • Page 5

    1 - 2 * 1 low power only, * 2 receive only note: usa channels for u.K. And italy versions only. ‘ ‘ vhf marine channel list usa 01a 03a 05a 06 07a 08 09 10 11 12 13* 1 14 15* 1 16 17* 1 18a 19a 20 20a 21a int 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15* 1 16 17* 1 18 19 20 21 transmit 156.050 156.0...

  • Page 6: Section 2

    Section 2 inside views 2 - 1 • main unit • front unit reference oscillator (x2: cr-659) vco circuit fm if ic (ic1: ta31136fn) 2nd if filter (fi3: cfws45qf) 1st mixer (q1:3sk272) antenna switching circuit 1st if filter (fi1,fi2: fl-310) ygr amplifier (q11: 2sc3268) af power amplifier (ic9: la4425a) p...

  • Page 7: Section 3

    Section 3 disassembly instructions 3 - 1 • removing the case ¡ unscrew 6 screws, a . Note: when replacing the screw, 10–12 kg of torque must be applied to ensure water resistance. • removing the main unit ¡ remove the shield cover. ™ unsolder dc cable (4 points) and antenna connector, b (2 points), ...

  • Page 8

    Section 4 circuit description 4 - 1 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. Rece...

  • Page 9

    4 - 2 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 ic1 (pin 9) are applied to the de-emphasis circuit (r101, c140). The de-emphasis circuit is ...

  • Page 10

    4 - 3 4-3 pll circuits 4-3-1 general the pll circuit provides stable oscillation of the transmit fre- quency and receive 1st 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 an...

  • Page 11

    4 - 4 4-4 atis and dsc circuits 4-4-1 atis encode circuit ([hol], [frg] only) (logic board and main unit) the fsk signal of atis created at cpu (ic1) is passed through the ladder type d/a convertor (r55–r73) to convert into the analog signal. The analog signal is applied to the buffer amplifier (q8)...

  • Page 12

    4 - 5 pin port description number name pin port description number name 1 2 3 5 6 7 8 16 17 18 20 21 22 23 27 28 29 31 83 84 85 89 90 91 92 cont1 cont2 beepm ch16 ch h/l hang pck pstb pdata icfc bplvl eck eda hi/lo rrxd rtxd bpfv tmut nmeai nmeao sqlv sql lbat txdet outputs control signal for the lc...

  • Page 13

    5 - 1 section 5 adjustment procedures 5-1 preparation ■ required test equipment equipment dc power supply rf power meter (terminated type) frequency counter fm deviation meter dc voltmeter digital multi-meter distortion meter grade and range output voltage : 13.8 v dc current capacity : 10 a or more...

  • Page 14

    5 - 2 5-2 pll adjustments lock voltage reference frequency adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 2 1 • operating channel : ch16 • receiving • operating channel : ch16 • output power : low • transmitting • operating channel : ch16 • output powe...

  • Page 15

    5 - 3 5-4 receiver adjustments sensitivity squelch • operating channel : ch16 • [squelch] control : max. Counterclockwise • connect an ssg to the antenna connector and set as: frequency : 156.800 mhz level : 3.2 µv* (–97 dbm) modulation : 1 khz deviation : ±3.5 khz • receiving • operating channel : ...

  • Page 16

    5 - 4 r71 output power adjustment r138 frequency deviation adjustment r16 squelch level adjustment cp2 squelch level check point + + j2 [ptt] 4 1 r q ac millivoltmeter 2 200 mv audio generator 300 hz to 3 khz.

  • Page 17: Section 6

    6 - 1 [logic board] ic1 1140009810 s.Ic hd6473847rh ic2 1130009680 s.Ic hn58x2432ti ic3 1130007570 s.Ic bu4094bcfv-e2 ic4 1130005290 s.Ic tc74hc14af ic6 1130009110 s.Ic s-80942anmp-dd6-t2 ic7 1170000350 s.Ic pc357n6t q1 1590000720 s.Transistor dta144eua t106 q2 1530002850 s.Transistor 2sc4116-bl (te...

  • Page 18

    6 - 2 [main unit] [vr-a board] s.=surface mount r1 7210002350 variable tp96n97n15f-10ka-1301 w1 8900010820 cable opc-1099 ep1 0910054112 pcb b 5585b r1 7210002360 variable tp96n97-15f-10kb-1301 ep1 0910054122 pcb b 5586b ic1 1110003200 s.Ic ta31136fn (el) ic2 1130007610 s.Ic µpd3140gs-e1 (ds8) ic3 1...

  • Page 19

    6 - 3 s.=surface mount [main unit] [main unit] r39 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r40 7030003470 s.Resistor erj3geyj 182 v (1.8 k Ω ) r41 7030003410 s.Resistor erj3geyj 561 v (560 Ω ) r42 7030003550 s.Resistor erj3geyj 822 v (8.2 k Ω ) r43 7030003550 s.Resistor erj3geyj 822 v (8.2 k ...

  • Page 20

    6 - 4 [main unit] [main unit] s.=surface mount c49 4030006850 s.Ceramic c1608 jb 1h 471k-t-a c50 4550006130 s.Tantalum ecst1vy224r c51 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c52 4030007090 s.Ceramic c1608 ch 1h 470j-t-a c53 4030007080 s.Ceramic c1608 ch 1h 390j-t-a c54 4030009540 s.Ceramic c1608 ...

  • Page 21

    6 - 5 [main unit] c261 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c262 4030007090 s.Ceramic c1608 ch 1h 470j-t-a c264 4030007090 s.Ceramic c1608 ch 1h 470j-t-a c265 4030007090 s.Ceramic c1608 ch 1h 470j-t-a c266 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c267 4030007040 s.Ceramic c1608 ch 1h 180j-t-a ...

  • Page 22: Section 7

    7 - 1 section 7 mechanical parts and disassembly ref. No. Order no. Description qty. [chassis parts] r1 7210002350 tp96n97n 15f-10ka-1301 (incl. Nut) 1 ref. No. Order no. Description qty. [vr-a board] r1 7210002360 tp96n97 15f-10kb-1301 (incl. Nut) 1 ref. No. Order no. Description qty. [vr-b board] ...

  • Page 23

    Mp10 (f) mp18 (c) mp11 (c) mp21 (c) mp13 (c) mp13 (c) mp18 (c) mp18 (c) mp18 (c) mp18 (c) mp18 (c) mp4 (c) mc1 (f) r1 (va) r1 (vb) mp12 (f) mp12 (f) mp2 (f) mp6 (c) sp1 (f) vr-b board ep2 (l) ep2 (l) mp6 (f) mp6 (f) mp15 (f) logic borad mp2 (l) vr-a board ds1 (l) mp1 (l) mp3 (l) mp14 (c) w3 (f) mp14...

  • Page 24

    7 - 3 7-2 hm-132 w1 8900010610 cable opc-1081 [black] 1 8900010620 cable opc-1082 [white] 1 mp1 8210017950 2352 front panel (d)-1 [black] 1 8210017960 2352 front panel (e)-1 [white] 1 mp2 8210016850 2352 rear panel [black] 1 8210017110 2352 rear panel (a) [white] 1 mp3 8930052160 2352 key 1 mp4 8930...

  • Page 25

    Section 8 semi-conductor information 8 - 1 • transistor and fet’s b e c fmw1 (symbol: w1) 2sc2714 y (symbol: qy) 2sb1132 r (symbol: bar) 2sc3268 (symbol: me) 2sb1202 s (symbol: b1202) 2sc3775 3 (symbol: oy3) 2sc4215 o (symbol: qo) b e c b e c 2sa1576 r (symbol: fr) 2sa1588 gr (symbol: zg) b e c b e ...

  • Page 26

    9 - 1 section 9 board layouts 9-1 vr-a board 9-2 vr-b board 9-3 hm-132 • top view • bottom view 1 b-5585b r1 w1 gnd gnd vol2 vol1 hvs 5 w1 1 to main unit j5 1 w1 r1 b-5586b gnd sqlv 5v 3 w1 1 to main unit j5 r1 r2 r3 r4 c1 s4 s2 mc1 s3 s1.

  • Page 27

    9-4 logic board • top view 9 - 2 q8 r71 c31 r70 r73 r61 r60 r59 r69 r68 r67 r66 r65 c23 c22 c32 r87 r86 r26 be r8 c7 j3 j3 1 r5 r88 r9 q1 ic1 r58 r57 r56 r55 r51 r50 r64 r63 r62 r72 r53 r54 r52 r85 c8 q11 c18 c30 ic2 c12 r21 c10 r18 r17 r20 r22 r19 r13 r15 r16 r14 q2 r12 q4 r44 r45 c21 r1 1 r81 r80 ...

  • Page 28

    9 - 3 • bottom view ds1 ds3 ds4 ds5 ds7 ds8 ds6.

  • Page 29

    9 - 4 9-5 main unit • top view c184 c279 c125 c296 c191 c193 c192 c194 c298 c196 c195 c190 r99 c138 r100 r97 c139 r101 r98 r96 c277 r80 c120 c121 c124 c189 r141 r143 r142 r140 c169 c168 r102 c271 c270 c78 c76 r58 c73 c91 c92 r139 c295 c68 c267 c70 c268 r57 r56 l29 r54 r192 c294 c71 r59 r60 c74 c77 c...

  • Page 30

    9 - 5 r208 c82 c88 c89 c97 c96 r134 mp3 c104 r40 c49 c255 c262 c261 r195 r196 r194 r193 r212 r211 c299 r214 r215 c48 r36 r34 r21 c16 r20 c31 c24 r15 c26 c17 r11 c266 r9 c7 r35 c217 c222 r79 c93 r53 c257 r12 c28 c27 r19 c23 r18 c275 r10 c18 c25 r13 c14 c44 c46 r31 r30 r29 r32 r8 c12 c199 c201 c249 r1...

  • Page 31

    10 - 1 section 10 block diagram option external speaker hm-132 smart mic internal speaker mic mic ext.Sp sp main unit front unit rcv send pttm ic3: bu4094bcfv logic board vr-b board 5v sqlv x1: cr-691 9.8304mhz ds1: ttr5341 lcd buff dim ctrl lcd cont photo couple ci-v i/f key board q2: 2sc4116 bl q3...

  • Page 32

    11 - 1 section 11 voltage diagram 11-1 logic board r12 12 k q4 2sc4116 bl q2 2sc4116 bl q3 2sb1132 r r15 39 k r17 10 k r18 10 k r21 18 k r20 18 k dim3 dim2 ds7 fy1101 f-tr dim1 ds8 fy1101 f-tr r26 330 r13 3.3 k r14 1 k r16 47 k r19 10 k r22 18 k s5 s6 s7 s1 r1 100 k s2 r2 100 k s3 r3 100 k s4 band e...

  • Page 33

    11 - 2 11-2 main unit r76 150 4 2 3 pttm rmtm dsc+ dsc- vcc j7 gnd 1 2 3 4 5 6 1 2 3 4 t1 d16 1ss375 c228 470 p r158 100 c227 0.001 c226 470 p c252 0.001 r155 33 k l26 0.10 h r5 c5 0.001 r6 10 r12 1.5 k c20 100 p r14 1.2 k fi3 cfws450f c34 0.01 r25 100 l28 82 nh c258 9 p c259 9 p c260 0.001 c33 0.1 ...

  • Page 34

    11 - 3 11-3 hm-132 chassis unit w1 to main unit j4 to logic board j3 ptt mic up dn 16/9 mc1 c1 470 p r1 12 k w2 w1 s1 s2 r2 6.8 k s3 r3 15 k r4 33 k s4 ptt micg mic gnd 1 2 3 4 ptt micg mic pttg keym gnd 1 2 up_on 2.0v dn_on 3.0v 16/9_on 3.8v.

  • Page 35

    Introduction danger this service manual describes the latest service information for the ic-m401euro vhf marine transceiver at the time of publication. 2 versions of the ic-m401euro have been designed. This service manual covers each version. Model version color ordering parts be sure to include the...

  • Page 36: Service

    Service manual vhf marine transceiver 1-1-32, kamiminami, hirano-ku, osaka, 547-0003, japan s-13808iz-c1m © 2001 icom inc..