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Icom IC-M34 Service Manual

Other manuals for IC-M34: Instruction Manual, Instruction Manual
Manual is about: VHF MARINE TRANSCEIVER

Summary of IC-M34

  • Page 1

    S-14313xz-c1 dec. 2006 vhf marine transcever ic-m34.

  • Page 2

    This service manual describes the latest service information for the ic-m34 vhf marine transceiver at the time of publication. Never connect the transceiver to an ac outlet or to a dc power supply that uses more than 8 v. This will ruin the transceiver. Do not reverse the polarities of the power sup...

  • Page 3

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

  • Page 4: Section 1

    1 - 1 section 1 specifications m general • frequency coverage : tx rx 156.025–157.425 mhz 156.050–163.275 mhz • type of emission : 16k0g3e • antenna impedance : 50 Ω (nominal) • operating temperature range : –20˚c to +60˚c; –4˚f to +140˚f • power supply requirement (negative ground) : specified icom...

  • Page 5

    1 - 2 : e t o n 3 8 d n a 2 8 , 1 8 , 4 6 , 1 6 , 3 2 , 1 2 , 3 , s l e n n a h c x e l p m i s t o n n a c . S r e t a w . A . S . U n i c il b u p l a r e n e g e h t y b d e s u y ll u f w a l e b * 1 . Y l n o r e w o p w o l * 2 . R e w o p h g i h y r a t n e m o m * 3 . Y l n o n o i t a r e ...

  • Page 6: Section 2

    2 - 1 section 2 inside views af power amplifier (ic280:ta7368f) power supply controller (ic353: rsq035p03tr) apc controller (ic50: njm2125f) tx power amplifier (q54:rd07mvs1) 1st if filters (fil150, fil151: fl-412) if ic (ic170: ta31136fng) ceramic discriminator (x170: jtbm450cx24) d/a converter (ic...

  • Page 7: Section 3

    3 - 1 section 3 disassembly instruction 1. Removing the front panel • unscrew 4 screws a, and remove the rear panel from the front panel. 3. Removing the main unit q unsolder 2 points b (bottom side). W unsolder 1 point c (the core of the antenna connector). E unscrew 7 screws d, and remove the chas...

  • Page 8: Section 4

    4 - 1 section 4 circuit description 4-1 receiver circuits 4-1-1 antenna switch the received signals from the antenna connector are passed through the antenna switch which toggles the receive (rx) line and transmit (tx) line. The received signals from the antenna connector are passed through the low-...

  • Page 9

    4 - 2 if an external speaker-microphone or headset is attached to the [sp mic] connector (j250), the de-emphasized af signals are passed through the analog switch (ic430, pins 8, 9) and applied to the af power amplifier (ic280, pin 4) to obtain 0.2 w of af output power. The power-amplified af signal...

  • Page 10

    4 - 3 4-3 pll circuits 4-3-1 vco circuit the vco (q21, q22, d21−d23) generates the both of trans- mit signal and lo signals for the 1st if conversion. The vco output signals are buffer-amplified by q23 and q24. While transmitting, the vco output signal is applied to the transmit amplifiers via tx/rx...

  • Page 11

    4 - 4 pin no. Port name signal description i/o 1 beep beep sounds. Out 2 ps pll mode control signal. “low”=power save mode. Out 3 tdec tone signals. Out 4 dastb strobe signal to d/a converter. Out 5 plstb strobe signal to the pll ic. Out 10 sdatao common serial data. Out 11 sclk common clock signal....

  • Page 12: Section 5

    5 - 1 section 5 adjustment procedure equipment grade and range equipment grade and range rf power meter (terminated type) measuring range : 0.1–10 w frequency range : 100–300 mhz impedance : 50 Ω swr : less than 1.2 : 1 standard signal generator (ssg) frequency range : 0.1–300 mhz output level : 0.1...

  • Page 13

    5 - 2 ic-m34 to [sp mic] connector pc to usb po r t to rs-232c po r t opc-478 (rs-232c type) opc-478uc (usb type) opc-478u (usb type) fm deviation meter sinad meter speaker (8 Ω) audio generator ac millivoltmeter to the antenna connector attenuator 30 db rf power meter 0.1–10 w/50 Ω frequency counte...

  • Page 14

    5 - 3 note: the above screen is an example only. Each transceiver has its own specific values for each setting. Q: adjustment condition w: reference frequency e: transmit output power r: fm deviation t: microphone sensitivity y: receive sensitivity u: squelch level q w e r t u y i/o check button *; ...

  • Page 15

    5 - 4 adjustment adjustment condition operation value pll lock voltage (verify) 1 • operating ch. : 16 • receiving click the “i/o check button” on the cs-m34 adj's screen (see page 5-3) to open the i/o check window as below. 1.3–2.3 v (verify) 2 • operating ch. : 16 • rf power : low • connect an rf ...

  • Page 16

    5 - 5 receive sensitivity [bpf t1] note1: “receive sensitivity” should be adjusted before “squelch level.” otherwise, “squelch level ” will not be adjusted properly. Note2: do not put the cursor on [bpf all] and [bpf2] then push the [enter] key. Otherwise, “receive sensitivity” will not be adjusted ...

  • Page 17: Section 6

    6 - 1 section 6 parts list m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location ic1 1130011671 s.Ic mb15e03slpfv1-g-bnd-e1 b 47.8/9.1 ic2 1180002690 s.Reg s-812c36amc-c2q-t2g b 42.4/15.8 ic50 1120002830 s.Ic njm2125f-te...

  • Page 18

    6 - 2 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location r154 7030005090 s.Res erj2gej 104 x (100 k) t 81.6/37.4 r155 7030007290 s.Res erj2gej 222 x (2.2 k) t 81.5/34.8 r156 7030005000 s.Res erj2gej 471 x (470) t 80.3...

  • Page 19

    6 - 3 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location c98 4030017350 s.Cer ecj0ec1h020b b 103.4/20.2 c99 4030017650 s.Cer ecj0ec1h270j b 100.5/21.4 c100 4030017360 s.Cer ecj0ec1h030b b 101.4/18.4 c101 4030017400 s....

  • Page 20

    Screw abbreviations a, b0, bt: self-tapping ph: pan head zk: black ni-zu: nickel-zinc sus: stainless *: refer to section 9 board layouts. 7 - 1 section 7 mechanical parts and disassembly [chassis parts] ref order description qty. No. No. J31 6910014190 2497 ant connector 1 sp1 2510001330 036d0803 1 ...

  • Page 21

    7 - 2 mp43(c) mc250(m) w1(c) mp39(c) main unit mp33(c) mp34(c) mp35(c) mp33(c) mp37(c) mp39(c) mp42(c) j31(c) mp14(c) mp31(c) mp32(c) mp1(c) mp18(c) (c): chassis parts (m): main unit parts (a): accessories mp4(c) mp361(m) ds246(m) ep360(m) mp360(m) mp17(c) mp16(c) mp15(c) mp50(c) mp21(c) mp23(c) ep4...

  • Page 22

    8 - 1 section 8 semiconductor information •3sk294 (marking: uv) • kra302e (marking: pb) • kra304e (marking: pd) • krc404e (marking: nd) • krc414e (marking: np) • kta1664y (marking: r) • kta2015y (marking: z) • ktc2875 (marking: m) • ktc3770u (marking: r) • ktc3880s (marking: aq) • ktc811u (marking: ...

  • Page 23: Section 9

    9 - 1 section 9 board layouts 4 4 c 0 5 c c51 c52 3 5 c 4 5 c c55 c56 c57 c58 c59 c60 c62 c63 4 6 c 5 6 c c66 7 6 c 8 6 c c70 c71 c72 3 7 c 4 7 c 5 7 c 7 7 c c78 c80 c81 c82 c83 c84 5 8 c c86 c87 8 8 c c122 c123 c131 5 5 1 c 6 5 1 c c157 8 5 1 c 9 5 1 c 0 6 1 c c221 c222 c223 c226 8 2 2 c c229 c230 ...

  • Page 24

    9 - 2 c1 c2 c3 4 c 5 c c6 7 c 8 c 9 c c11 c12 3 1 c 5 1 c c16 c17 0 2 c 1 2 c 2 2 c 4 2 c 5 2 c 7 2 c 6 2 c 8 2 c 9 2 c 0 3 c 1 3 c c32 c33 4 3 c 5 3 c 6 3 c c37 c38 c39 0 4 c c41 2 4 c 3 4 c c61 c89 c90 1 9 c c92 3 9 c c94 c95 c96 7 9 c 8 9 c c99 c100 1 0 1 c 2 0 1 c 3 0 1 c c104 9 0 1 c c110 1 1 1...

  • Page 25: Section 10

    10 - 1 section 10 block diagram lpf ant sw antenna j1 pwr amp drive pre bpf rf amp bp f tx/rx sw buff bpf apc ctrl buff buff buff bpf if amp fil loop 7.9872mhz vcc vcc lpf x170 450khz bpf limi t am p lpf af mute af amp x1 21.25mhz amp vcc hv bpf bpf power sw af mute af mute af mute s5v hv vcc 5vs r5...

  • Page 26: Section 11

    11- 1 section 11 voltage diagram exptt on :4.91v off:0.00v 1.90v 1.89v 1.90v 1.91v 7.49v led on 4.95v 4.97v 7.9872 mhz 450mvp-p pttin on :4.86v off:0.00v r256 18k r263 100k 47p c410 0.027 c266 0.01 c385 0.027 c341 10 eee-s c282 r286 10k r276 180k r271 33k r262 1.8k q350 krc414e 0.001 c252 cd4066bpwr...

  • Page 27

    11 - 2 1 c 3 7 c tx:2.78v rx:2.85v tx:3.07v rx:3.05v 3.60v tx:0.72v rx:1.31v tx:1.47v rx:0.00v rx:0.00v tx:4.54v rx:2.06v tx:0.00v rx:0.00v tx:0.62v 5w:2.89v 1w:2.81v rx:1.13v tx:0.00v tx:0.00v rx:2.67v tx:0.00v rx:4.86v tx:0.00v rx:3.52v tx:2.08v rx:0.00v 7.50v 5.00v tx:0.00v rx:1.66v 3.62v 4.95v 4...

  • Page 28: Section 12

    12 - 1 section 12 bc-173 mp1(c) (vi i f h b id ) (c): chassis parts (m): main unit mp1(m) mp2(m) mp3(m) main unit mp3(c) mp2(c) mp4(c)×2 j1(m) [chassis parts] ref order description qty. No. No. Mp1 8010020650 3002 case 1 mp2 8110009030 3002 cover 1 mp3 8810008661 screw bt b0 3x8 ni-zc3 (bt) 2 mp4 89...

  • Page 29

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    1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14313xz-c1 © 2006 icom inc..