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Icom IC-M35 Service Manual

Summary of IC-M35

  • Page 1

    S-14520xz-c1 oct. 2008 vhf marine transceiver.

  • Page 2

    This service manual describes the latest technical information for the ic-m35 and ic-m36 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 specified. This will ruin the transceiver. Do not reverse the polariti...

  • Page 3

    Table of contents section 1 specifications section 2 inside views section 3 disassembly instruction section 4 circuit descripiton 4-1 receiver circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 transmitter circuits . . . . ...

  • Page 4: Section 1. Specifications

    1 - 1 section 1. Specifications ï general • frequency coverage : transmit 156.025–157.425 mhz receive 156.050–163.275 mhz • mode : fm (16k0g3e) • channel spacing : 25 khz • power supply requirement : bp-251 and bp-252 only • current drain (at 7.4 v dc) : tx (6 w/1 w) 1.5 a/0.7 a typical max. Audio 0...

  • Page 5

    1 - 2 note: simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 cannot be lawfully used by the general public in u.S.A. Waters. * low power only. Channel number frequency (mhz) 03 156.150 160.750 03 03a 156.150 156.150 156.200 160.800 04 02 156.100 160.700 02 04a 156.200 156.200 156.250 160.850 05 05...

  • Page 6: Section 2. Inside

    2 - 1 section 2. Inside views cpu (under the lcd) (ic360) vco • main unit (top view) • main unit (bottom view) 1st if mixer (q150) quad op amp (af filetr/af amps) (ic200) internal microphone (mc250) “vcc” line switch (q353) 1st if filters (fi150, 151) 1st if amp (q151) af power amp (ic362) cpu clock...

  • Page 7: Section 3. Disassembly

    3 - 1 section 3. Disassembly instruction 1. Removing front panel • unscrew 4 screws from the rear panel, and remove the rear panel from the front panel. Notice: not to lost 2 o-rings. 3. Removing main unit 1) unsolder 2 points from the top side, and 1 point from the bottom side. 2. Removing chassis ...

  • Page 8: Section 4. Circuit

    4 - 1 1st if, 2nd if and demodulator circuits • 1st if circuits the rx signals are mixed with 1st lo signals to be converted into the 21.7 mhz 1st if signal at the 1st mixer (q150). The converted 1st if signal is filtered by the crystal filter (fi150, 151) to remove unwanted out-of-band signals. The...

  • Page 9

    • tx af and modulation circuits • tx amplifiers and apc circuit 4 - 2 4-2 transmitter circuits tx af circuits af signals from the microphone (mic signals) are passed through the mic line sw (ic260a) and amplified by mic amp (ic200b), then passed through the mic mute sw (ic260c). The mic line sw (ic2...

  • Page 10

    4 - 3 4-3 frequency synthesizer circuits vco while transmitting, the vco (q21, 22, d20–23) oscillating frequency is determined by the value of d22, d23, l22, c26 and c27, and the frequency modulation is carried out by adding modulation signals to d20. While receiving, d21 is turned on and c28 is con...

  • Page 11

    4 - 4 4-5 port allocations • cpu (ic360) • d/a converter (ic190) pin no. Line name description 1 beep beep sound (squarewave) output. 2 ps pll power save mode control. 3 tdec decoded tone signal output. (for monitor) 4 dastb strobe signal to d/a converter. 5 plstb strobe signal to pll ic. 6 erxdi ex...

  • Page 12: Section 5. Adjustment

    5 - 1 section 5. Adjustment procedure equipment grade and range equipment grade and range adjustment software cs-m36/35 adj (revision 1.0 or later) jig cable • opc-478 or opc-478uc • modifi ed opc-1668 (see the illust below) rf power meter (50 Ω terminated) measuring range : 0.1–10 w frequency range...

  • Page 13

    5 - 2 microsoft, windows and windows vista are either registered trademarks or trademarks of microsoft corporation in the united states and/or other countries. ¤ adjustment software installation q quit all applications if windows is running. W insert the cd into the appropriate cd drive. E double-cl...

  • Page 14

    5 - 3 adjustment adjustment item transceiver’s condition operation value pll lock voltage (verification) 1 [lvin] (i/o check window) • ch. : 16 • receiving 1) connect an rf power meter (or a dummy load) to the antenna connector. 2) verify that the lock voltage is in the specified range on the "i/o c...

  • Page 15

    5 - 4 5-3 receive adjustments adjustment adjustment item transceiver’s condition operation value rx sensitivity 1 [bpf t1] • ch. : 16 • receiving 1) connect a signal genelator to the antenna connector, and set it as specifi ed below. 2) push the [enter] key of the pc. (automatic adjustment) squelch ...

  • Page 16

    5 - 5 adjustment adjustment item transceiver’s condition operation value tx power -high power- (using bp-250) 1 [rf power (high)] • ch. : 16 • tx power : high • transmitting 1) connect an rf power meter to the antenna connector. 2) adjust the tx power. 5.6 w except [aus] 4.7 w [aus] (using bp-251; w...

  • Page 17

    5 - 6 jig cable attenuator (30 db/10 w) modulation analyzer (0.1–300 mhz) setting; hpf : off lpf : 20 khz de-emphasis : off detector : (p-p)/2 adjustment adjustment item transceiver’s condition operation value deviation 1 [mod] • ch. : 16 • tx power : low • transmitting 1) connect a modulation analy...

  • Page 18: Section 6. Parts

    6 - 1 section 6. Parts list m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v no. No. Location ic1 1130011671 s.Ic mb15e03slpfv1-g-er-6e1 b 36.2/11.8 ic2 1180002690 s.Reg s-812c36amc-c2q-t2g b 32.9/17.4 ic50 1120002830 s.Ic njm2125f-...

  • Page 19

    6 - 2 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v no. No. Location r90 7030005590 s.Res erj2gej 680 x (68) [chn] b 88.8/15.4 7030005590 s.Res erj2gej 680 x (68) [eur-1] 7030005590 s.Res erj2gej 680 x (68) [eur] 7030005590 s.Res...

  • Page 20

    6 - 3 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v no. No. Location c27 4030018010 s.Cer ecj0ec1h360j b 45.8/10.4 c28 4030017460 s.Cer ecj0eb1e102k b 45.7/13.8 c29 4030017460 s.Cer ecj0eb1e102k b 51.6/12.1 c30 4030017460 s.Cer e...

  • Page 21

    6 - 4 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v no. No. Location c340 4030016790 s.Cer ecj0eb1c103k b 97.4/30.6 c341 4030008890 s.Cer c1608 jb 1h 273k-t b 94.9/34.3 c350 4030016790 s.Cer ecj0eb1c103k t 104.3/24.8 c351 4030016...

  • Page 22: Section 7. Mechanical

    7 - 1 [chassis parts] ref order description qty. No. No. J31 6910014190 2497 ant connector 1 mc1 7700002890 em6027-46c33-g-02 1 sp1 2510001510 psc-3656pa 1 w2* 8900016360 opc-1190a 1 mp1 8210025450 3168 front panel assy (incl. Sp1, mp2, 3, 5–7, 19, 51, 54) 1 mp2 8310073150 3168 window plate [ic-m36]...

  • Page 23

    7 - 2 mp361(m) mp360(m ) mp362(c) mp37(c) mp32(c) mp34(c) mp31(c) mp8(c) mp9(c) mp57(c) j31(c) mp22(c ) mp4(c ) mp48(c ) mp35(c ) mp55(c ) mc1(c ) mp56(c )×2 mp23(c ) ×2 mp24(c ) ×2 mp25(c )×2 mp42×3(c ) mp59(c )×2 mp39(c )×4 mp39(c )×4 mp33(c )×2 mp21(c ) ep360(m ) main unit mp61(c) mp18(c) mc250(c...

  • Page 24: Section 8. Board

    8 - 1 section 8. Board layouts • main unit (top view) the above key top print illustration is for ic-m36 and is for your reference only. Ic-m35 has different key top print. Gnde mic clone afout spo c8 c9 c12 c56 c57 c58 c59 c60 c133 c155 c156 c157 c158 c159 c160 c350 c360 c361 c363 c364 c365 c366 c3...

  • Page 25: • Main Unit

    8 - 2 • main unit (bottom view) erxdi cpu5v ndet etxdo res vpp sp1 (chassis) [ptt] [sp mic] gnd mic mc250 gnd w2 (chassis) nclmic mc1 (chassis) mp21 (vco cover) mp20 (vco cace) antenna connector w2 (yellow) w1 (black) c1 c2 c3 c4 c5 c6 c7 c11 c13 c15 c16 c17 c20 c21 c22 c24 c25 c26 c27 c28 c29 c30 c...

  • Page 26: Section 9. Block

    9 - 1 section 9. Block diagram lpf ant sw antenna j1 pwr am p drive pre bpf rf amp bpf tx/rx sw buff bpf apc ctrl buff buff buff bpf if amp fil loop 7.9872mhz vcc vcc lpf x170 450khz bpf limit am p lpf af am p x1 21.25mhz amp vcc hv bpf bpf power sw af mut e af mut e af mut e s5v hv vcc am p buff s5...

  • Page 27: Section 10. Voltage

    *; refer to “parts list.” 10 - 1 section 10. Voltage diagram ds242 sml-311yt ds243 sml-311yt ds244 sml-311yt ds245 sml-311yt 0. 1 c283 0.1 c285 0. 1 c372 0.01 c191 0.01 c193 0.0 1 c194 0.01 c200 0.01 c262 0.01 c340 0.01 c350 0.01 c360 0.001 c206 0.001 c284 0.001 c252 0.047 c288 0.047 c361 0.047 c363...

  • Page 28

    10 - 2 *; refer to “parts list.” njm2125f ic50 1 2 3 4 5 r8 0 82k r2 100k njm2870 ic220 1 ctrl 2 gnd 3 nb 4 vout 5 vin d20 ma2s077g0 0.001 c72 r235 330k r236 150k mpz1608s221a ep3 mpz1608s221a ep2 rb706f d91 0. 1 c1 0.1 c58 0. 1 c57 0. 1 c177 0.1 c181 0.01 c2 0.01 c7 0.01 c56 0.01 c221 0.01 c222 0.0...

  • Page 29

    6f n o .68, sec . 1 cheng- t eh road, t aipei, t ai w an, r. O . C . Phone : +886 (02) 2559 1899 f ax : +886 (02) 2559 1874 url : http://ww w .Asia-icom.Com e-mail : sales@asia-icom.Com zac de la plain e 1 rue b r indejonc des moulinais bp 5804 31505 t oulouse ced e x, f r ance phone : +33 (5) 61 36...

  • Page 30

    1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14520xz-c1 © 2008 icom inc..