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Icom IC-M401E Service Manual

Other manuals for IC-M401E: Service Manual
Manual is about: VHF

Summary of IC-M401E

  • Page 1

    Vhf marine transceiver ic-m401e service manual.

  • Page 2

    Introduction danger this service manual describes the latest service information for the ic-m401e vhf marine transceiver at the time of publication. 4 versions of the ic-m401e have been designed. This ser- vice manual covers each version. Model ic-m401e version uk, eur, hol, frg eur-1 symbol black w...

  • 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

    1 - 1 section 1 specifications ‘ ‘ general • frequency coverage : 156.000–161.450 mhz (tx) 156.000–163.425 mhz (rx) • mode : 16k0g3e (fm) 16k0g2b (dsc) • power supply requirement : 13.8 v dc (negative ground) • usable temperature range : –20˚c to +60˚c • frequency stability : ±10 ppm (–20˚c to +60˚c...

  • Page 5

    1 - 2 * 1 low power only, * 2 for [uk] version only ‘ ‘ vhf marine channel list usa * 2 01a 03a 05a 06 07a 08 09 10 11 12 13* 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 156.050 156.050 156.100 156.150 156.150 156.200 156.250...

  • Page 6: Section 2

    2 - 1 section 2 inside views • front unit • main-e unit antenna switching circuit (d14, d21: xb15a308) vco circuit pll reference oscillator (x1: cr-768) 1st mixer (q22: 3sk131) ygr amplifier (q12: 2sc3775) pre-driver (q10: 2sc4226) power amplifier (ic3: ra35h1516m-01) 1st if filter 21.7 mhz (fi1: fl...

  • Page 7: Section 3

    3 - 1 section 3 disassembly instructions • removing the case 1 unscrew 6 screws, a. Note: when replacing the screw, 10–12 kg of torque must be applied to ensure water resistance. • removing the main-e unit 1 remove the shield covers, mp31 and mp33. 2 unsolder the antenna connector, b (1 point). 3 un...

  • Page 8

    Section 4 circuit description 4 - 1 4-1 receiver circuits 4-1-1 antenna switching circuit (main-e 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. Re...

  • Page 9

    4 - 2 4-1-5 af amplifier circuit (main-e 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 ic2 (pin 9) are applied to the de-emphasis circuit (r231, c232). The de-emphasis circuit i...

  • Page 10

    4 - 3 4-2-4 power amplifier circuit (main-e unit) the power amplifier circuit amplifies the driver signal to an output power level. Ic3 is a power module which has amplification output capa- bilities of about 35 w with 50 mw input. The output from ic3 (pin 4) is passed through the antenna switching ...

  • Page 11

    4 - 4 4-3-2 tx and rx loop (main-e unit) the generated signal at the vco (q4, q5, d3, d4) enters the pll ic (ic1, 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 refer- ence frequency, an...

  • Page 12

    Keym ptt tag scn up dn unlk 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 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 sqlv sql lbat txdet outputs contro...

  • 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 l36 r114 r327 l35 l38 cp5 output power adjustment frequency deviation adjustment squelch level check point cp3 sensitivity check point r214 squelch level adjustment sensitivity adjustment l39 + – – + j4 [ptt] ac millivoltmeter audio generator 4 1 r q.

  • Page 17: Section 6

    [main-e unit] [main-e unit] ic1 1130007610 s.Ic µpd3140gs-e1 (ds8) t ic2 1110003200 s.Ic ta31136fn (el) t ic3 1150002080 ic ra35h1516m-01 t ic4 1130007300 s.Ic tc4w66fu (te12l) t ic7 1110000960 s.Ic njm4558m-t1 b ic8 1110000960 s.Ic njm4558m-t1 b ic9 1110003090 ic la4425a t ic10 1110002020 ic ta7805...

  • Page 18

    [main-e unit] r126 7030005420 s.Resistor erj3geyj 202 v (2 k Ω) b r127 7030005420 s.Resistor erj3geyj 202 v (2 k Ω) b r141 7030003220 s.Resistor erj3geyj 150 v (15 Ω) t r146 7030003680 s.Resistor erj3geyj 104 v (100 k Ω) b r147 7030003320 s.Resistor erj3geyj 101 v (100 Ω) b r149 7030003680 s.Resisto...

  • Page 19

    [main-e unit] [main-e unit] c101 4030007050 s.Ceramic c1608 ch 1h 220j-t t c102 4030007040 s.Ceramic c1608 ch 1h 180j-t t c103 4030007080 s.Ceramic c1608 ch 1h 390j-t t c104 4030007040 s.Ceramic c1608 ch 1h 180j-t b c105 4510005310 s.Electrolytic ecev1ca220sr t c106 4030006860 s.Ceramic c1608 jb 1h ...

  • Page 20

    [logic-e board ] [main-e unit] c415 4030008470 s.Ceramic c1608 jb 1h 272k-t b c416 4030006860 s.Ceramic c1608 jb 1h 102k-t b rl1 6330001670 relay ftr-p3cp012w1 t j4 6510018970 s.Connector b4b-ph-sm3-tb t j5 6510019420 s.Connector b8b-zr-sm3-tf t j6 6510022470 s.Connector 40flt-sm1-tb t j7 6510015540...

  • Page 21

    [vr board ] [logic-e board ] r62 7030003560 s.Resistor erj3geyj 103 v (10 k Ω) t r63 7030003490 s.Resistor erj3geyj 272 v (2.7 k Ω) t r64 7030003800 s.Resistor erj3geyj 105 v (1 m Ω) t r65 7030003680 s.Resistor erj3geyj 104 v (100 k Ω) t r71 7030003640 s.Resistor erj3geyj 473 v (47 k Ω) t r72 703000...

  • Page 22

    S.=surface mount 6 - 6 [main unit] r1 7010007640 resistor frd25 t2-123j (12 k Ω) t r2 7010007630 resistor frd25 t2-682j (6.8 k Ω) t r3 7010007650 resistor frd25 t2-153j (15 k Ω) t r4 7010007660 resistor frd25 t2-333j (33 k Ω) t c1 4030018550 s.Ceramic c1608 jb 1h 223k-t t c2 4030011340 s.Ceramic c16...

  • Page 23: Section 7

    R1 7210002360 tp96n97n15f-10kb-1301 (incl. Nut) 1 r 1 7210002350 tp96n97n15f-10ka-1301 (incl. Nut) 1 w 1 8900010820 cable opc-1099 1 ref. No. Order no. Description qty. 7 - 1 section 7 mechanical parts and disassembly [chassis parts] ref. No. Order no. Description [logic-e board] ref. No. Order no. ...

  • Page 24

    7 - 2 unit abbreviations (c): chassis parts, (l): logic-e board, (m): main-e unit (vr): vr board, (sql): sql board, (f): front unit mp43 (c) mp43 (c) mp43 (c) mp42 (c) mp42 (c) mp42 (c) mp42 (c) mp42 (c) mp42 (c) mp1 (c) mp4 (c) mp47 (c) mp10 (f) mp41 (c) sp1 (f) ep2 (l) mp2 (l) mp4 (f) r1 (sql) r1 ...

  • Page 25

    62.5 (2 13 ⁄ 32 ) 3 ( 1 ⁄ 8 ) 42 (1 21 ⁄ 32 ) 5.5 ( 7 ⁄ 32 ) 88 (3 13 ⁄ 32 ) 92.1 (3 5 ⁄ 8 ) unit: mm (inch) 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 821001685...

  • Page 26: Section 8

    8 - 1 section 8 semi-conductor information • transistor and fet’s b e c fmw1 (symbol: w1) 2sc2714 y (symbol: qy) 2sb1132 r (symbol: bar) 2sc3775 3 (symbol: oy3) 2sc4215 o (symbol: qo) b e c b e c b e c 2sa1576a r (symbol: fr) 2sa1577 q (symbol: hq) 2sa1588 gr (symbol: zg) b e c b e c b e c b e c 2sc...

  • Page 27

    9 - 1 section 9 board layouts w1 opc-1099 to main-e unit j5 to sql board 8 1 2 3 4 5 6 7 1 2 3 4 5 1 2 3 gnd gnd vol2 vol1 hvs gnd sqlv 5v gnd gnd vol2 vol1 hvs 1 2 3 gnd sqlv 5v 9-1 vr board • top view 9-3 hm-132 • top view • bottom view 9-2 sql board • top view • bottom view • bottom view r1 r2 r3...

  • Page 28

    9 - 2 the combination of this page and the next page shows the unit layout in the same configuration as the actual p.C. Board. Cp2 cp1 sp– sp1 sp+ + – 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 1 1 3 4 5 2 6 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 sp+ nc sp– bplvl vcc nc 5v...

  • Page 29

    9 - 3 ds1 • bottom view the combination of this page and the previous page shows the unit layout in the same configuration as the actual p.C. Board..

  • Page 30

    9 - 4 hvs vol1 vol2 gnd gnd 5v sqlv gnd 1 39 2 j6 40 to logic-e board j4 (opc-1046) 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0 1 3 5 7 9 1 1 1 3 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 3 3 3 5 3 7 3 9 ptt micg mic gnd 1 4 to hm -132 8 1 3 2 1 5 4 3 2 1 3 2 1 5 4 3 2 1 8 7 6 ...

  • Page 31

    9 - 5 cp18 cp19 cp16 cp17 sp+ sp– hv gnd to dc power to ext speaker • bottom view the combination of this page and the previous page shows the unit layout in the same configuration as the actual p.C. Board..

  • Page 32

    10 - 1 section 10 block diagram explanatory notes voltage line tx line rx line common line x1: cr-691 9.8304 mhz ant lpf ant sw drive pre tx/rx sw bpf xtal ygr amp pwr amp noise amp noise det apc ctrl pwr ctrl buff buff x1: cr-768 21.25 mhz fil loop lpf bpf sp1 ci-v i/f bpf bpf ceramic af amp buff r...

  • Page 33

    11 - 1 section 11 voltage diagram 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 2 1 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 j4 ic8 pc357n6t q9 2sa1576a q8 2sc4081 ic3 bu4094bcfv-e2 q7 dta144eua q11 dta114eua q4 2sk1069 ic2 s-80942cnmc-g9c-t2 q1 2sc4116 q2 2sb1132 q3 2sc4116 ic7 ...

  • Page 34

    11 - 2 l6 0.1 µh j6 2 1 4 3 6 5 8 7 10 9 12 11 14 13 16 15 18 17 20 19 22 21 24 23 26 25 28 27 30 29 32 31 34 33 36 35 38 40 37 39 c340 47p c339 47p c341 47p c338 0.001 c337 22p c336 0.001 c331 0.01 c347 82p c346 0.001 to logic-e board j4 opc-1046 c349 0.001 r1 10k-b w1 5v sqlv gnd r1 10k-a w1 gnd v...

  • Page 35

    11 - 3 mc1 kuc3523-040245 c1 0.022 c2 470 r1 12k r2 6.8k s4 skhham024a r3 15k r4 33k s2 skhham024a s1 skhhlp014a s3 skhham024a 1 2 1 2 3 4 w2 w1 w3 w4 up [y] down [z] 16/c ptt mic ptt to logic-e board j3 to main-e unit j4 micg mic gnd keym gnd chassis unit w1 opc-1081 (black) opc-1082 (white) y on 2...

  • Page 37

    S-14013mz-c2 © 2004 icom inc. 1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan.