1. DL manuals
  2. Icom
  3. Two-Way Radio
  4. IC-F43GS
  5. Service Manual

Icom IC-F43GS Service Manual

Summary of IC-F43GS

  • Page 1

    Jul. 2008 service manual addendum contents parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 board layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 voltage diagram . . . . . . . . . . . . . . . . . . . . . . . . . 9 sep. 2008 model version version abbreviati...

  • Page 2: Section 6

    Sep. 2008 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 ic6 1110006350 s.Ic lm2902pwr b 55.4/23.8 ic8 1110005771 s.Ic s-80942cnmc-g9ct2g b 20.8/41.5 ic9 1110003201 s.Ic ta31136fng (el) t 81...

  • Page 3

    Sep. 2008 2 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v . O n . O n location r75 7030005100 s.Res erj2gej 154 x (150 k) b 78.7/29.5 r76 7030004980 s.Res erj2gej 101 x (100) b 78.8/27.9 r77 7030004980 s.Res erj2gej 101 x (100) b...

  • Page 4

    Sep. 2008 3 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v . O n . O n location r348 7030005120 s.Res erj2gej 102 x (1 k) t 84.1/33.2 r349 7030005120 s.Res erj2gej 102 x (1 k) b 28/20.4 r350 7030005120 s.Res erj2gej 102 x (1 k) b ...

  • Page 5

    Sep. 2008 4 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v . O n . O n location c123 4030017640 s.Cer ecj0ec1h150j [1], [2], [3], [5], [7], [11], [12], [13], [14], [15], [17], [19], [21], [25], [26] b 73/22.9 c124 4030017590 s.Cer...

  • Page 6

    Sep. 2008 5 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v . O n . O n location c396 4030017360 s.Cer ecj0ec1h030b [5], [7], [10], [16], [19], [21], [23], [24] b 84.7/24.8 4030017580 s.Cer ecj0ec1h060c except [5], [7], [10], [16],...

  • Page 7

    Sep. 2008 6 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [pa unit] [ant unit] ref parts description m. H/v . O n . O n location ref parts description m. H/v . O n . O n location c734 4030017730 s.Cer ecj0eb1e471k t 13.1/2.4 c735 4030017360 s.Cer ecj0ec1h030b [10], [16]...

  • Page 8: Section

    Sep. 2008 7 section 9 board layouts • main unit (top view) • pa unit (top view) • fuse unit (top view) • ant unit (top view) • bc-160 (top view) 1 2 sp1 (chassis) j1 (chassis) j4 j3 clone sp mic micg afout vcc gnd j2 dc in (no patterns) c802 c803 c804 c805 c806 l801 l802 r801 b6232a h0 h5 h10 v0 v5 ...

  • Page 9: • Pa Unit (Bottom View)

    Sep. 2008 8 s-14108ih-p2- q printed in japan © 2004−2007 icom inc. • pa unit (bottom view) • fuse unit (bottom view) • main unit (bottom view) • ant unit (bottom view) • bc-160 (bottom view) [monitor] [rotary selector] [vol] [ptt] [up] [down] mc1 j5 30 gnd pttin 1 +5v ptt out vcc micout micmute mici...

  • Page 10: Section

    Sep. 2008 9 section 11 voltage diagram note: refer to “parts list” for the value or component name. • main unit c53 c139 q16 c116 c61 c163 c51 c60 q5 c58 c208 c119 q17 l35 c66 c36 c164 q6 c109 l33 c165 c120 c108 c209 c145 c129 c395 c143 d1 0 c182 c62 c162 q7 q20 c155 c152 c225 c132 x1 c65 c67 c111 c...

  • Page 11

    Sep. 2008 10 c707 q701 l701 c702 c703 r701 c715 l 7 0 6 mp701 l 7 0 4 q702 c734 d702 r706 c723 c718 c724 r703 r710 c701 c725 r704 c752 t o _ l p f d704 l 7 0 9 c742 j 7 0 2 1 2 q704 c708 q703 c753 r726 d703 c754 d701 l705 c716 c722 c726 c727 c732 c719 r728 c713 c711 l 7 0 3 c755 c756 j 7 0 1 1 2 3 4...

  • Page 12: Service Manual

    Jul. 2008 service manual addendum contents parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 board layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 voltage diagram . . . . . . . . . . . . . . . . . . . . . . . . . 9 jul. 2008 model version version abbreviati...

  • Page 13: Section 6.

    Jul. 2008 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 ic6 1110006350 s.Ic lm2902pwr b 55.4/23.8 ic8 1110005771 s.Ic s-80942cnmc-g9ct2g b 20.8/41.5 ic9 1110003201 s.Ic ta31136fng (el) t 8...

  • Page 14

    Jul. 2008 2 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref parts description m. H/v . O n . O n location r75 7030005100 s.Res erj2gej 154 x (150 k) b 78.7/29.5 r76 7030004980 s.Res erj2gej 101 x (100) b 78.8/27.9 r77 7030004980 s.Res erj2gej 101 x (100) b...

  • Page 15

    Jul. 2008 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 r348 7030005120 s.Res erj2gej 102 x (1 k) t 84.1/33.2 r349 7030005120 s.Res erj2gej 102 x (1 k) b 28/20.4 r350 7030005120 s.Res erj2gej 102 x (1 k) b 22.7...

  • Page 16

    Jul. 2008 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 c123 4030017620 s.Cer ecj0ec1h100c b 73/22.9 c123 4030017640 s.Cer ecj0ec1h150j [1], [2], [3], [5], [7], [11], [12], [13], [14], [15], [17], [19], [21], [...

  • Page 17

    Jul. 2008 5 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 c396 4030017360 s.Cer ecj0ec1h030b [5], [7], [10], [16], [19], [21], [23], [24] b 84.7/24.8 4030017580 s.Cer ecj0ec1h060c except [5], [7], [10], [16], [19...

  • Page 18

    Jul. 2008 6 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [pa unit] [ant unit] ref parts description m. H/v no. No. Location ref parts description m. H/v no. No. Location c734 4030017730 s.Cer ecj0eb1e471k t 13.1/2.4 c735 4030017360 s.Cer ecj0ec1h030b [10], [16] only t ...

  • Page 19: Section

    Jul. 2008 7 section 9 board layouts • main unit (top view) • pa unit (top view) • fuse unit (top view) • ant unit (top view) • bc-160 (top view) 1 2 sp1 (chassis) j1 (chassis) j4 j3 clone sp mic micg afout vcc gnd j2 dc in (no patterns) c17 c24 c36 c37 c42 c43 c51 c56 c57 c62 c66 c69 c70 c71 c72 c73...

  • Page 20: • Pa Unit (Bottom View)

    Jul. 2008 8 s-14108ih-p2- q printed in japan © 2004−2007 icom inc. • pa unit (bottom view) • fuse unit (bottom view) • ant unit (bottom view) • bc-160 (bottom view) [monitor] [rotary selector] [vol] [ptt] [up] [down] mc1 j5 30 gnd pttin 1 +5v ptt out vcc micout micmute micin afonop a ux beepout b us...

  • Page 21: Section

    Jul. 2008 9 section 11 voltage diagram note: refer to “parts list” for the value or component name. C53 c139 q16 c116 c61 c163 c51 c60 q5 c58 c208 c119 q17 l35 c66 c36 c164 q6 c109 l33 c165 c120 c108 c209 c145 c129 c395 c143 d1 0 c182 c62 c162 q7 q20 c155 c152 c225 c132 x1 c65 c67 c111 c137 c166 c30...

  • Page 22

    Jul. 2008 10 c707 q701 l701 c702 c703 r701 c715 l 7 0 6 mp701 l 7 0 4 q702 c734 d702 r706 c723 c718 c724 r703 r710 c701 c725 r704 c752 t o _ l p f d704 l 7 0 9 c742 j 7 0 2 1 2 q704 c708 q703 c753 r726 d703 c754 d701 l705 c716 c722 c726 c727 c732 c719 r728 c713 c711 l 7 0 3 c755 c756 j 7 0 1 1 2 3 4...

  • Page 23

    S-14108iz-c1- q apr. 2007 uhf transcever ic-f43gt ic-f43gs ic-f44gt ic-f44gs.

  • Page 24

    This service manual describes the latest service information for the ic-f43gt/gs ic-f44gt/gs uhf 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 expose the transceiver to rai...

  • Page 25

    Contents section 1 specifications section 2 inside views section 3 disassembly instructions section 4 optional units installation section 5 circuit descripiton 5-1 receiver circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-2...

  • Page 26: Section 1

    1 - 1 section 1 specifications m general • frequency coverage : 380.000–430.000 mhz [usa-03] 450.000–512.000 mhz [usa-01], [usa-02], [usa-04] 450.000–520.000 mhz [gen-01], [gen-02] 350.000–390.000 mhz [gen-04] 400.000–470.000 mhz [others] • mode : fm • type of emission : wide: 16k0f3e (25.0 khz) mid...

  • Page 27: Section 2

    2 - 1 section 2 inside views mute switch (d29: ma2s111) pll ic (ic21: lmx2352tm) base band ic (ic14: ak2346) eeprom (ic10: 24lc64t-i/sn) cpu (ic22: hd64f2238btf13) r5 regulator (q25: 2sa1577 q ) if ic (ic9: ta31136fn) af amplifier (ic15: ta7368f) apc amplifier (ic16: ta75s01f) if amplifier (q7: 2sc4...

  • Page 28: Section 3

    3 - 1 section 3 disassembly instruction • removing the chassis unit 1 unscrew 1 nut a , and remove 2 knobs b , c . 2 unscrew 2 screws d . 3 unscrew 2 screws e . 4 take off the chassis unit in the direction of the arrow. 5 unplug the connector f from the chassis unit. • removing the pa unit 1 unscrew...

  • Page 29

    4 - 1 section 4 optional unit installation : s w o ll o f s a t i n u l a n o i t p o e h t ll a t s n i q e t a t o r ] l o v [ - t a b e h t e v o m e r d n a , f f o r e w o p e h t n r u t o t . K c a p y r e t w . R e v o c t i n u e h t e v o m e r : e t o n , t n e m u r t s n i t a fl r a li...

  • Page 30

    4 - 2 n e h w d e r i u q e r s i n o i t a c i f i d o m d r a o b c p g n i w o l l o f e h t : s 7 1 1 - t u r o 7 1 1 - t u , 5 0 1 - t u l a n o i t p o e h t g n il l a t s n i q e t a t o r ] l o v [ - t a b e h t e v o m e r d n a , f f o r e w o p e h t n r u t o t . K c a p y r e t w above...

  • Page 31: Section 5

    5 - 1 section 5 circuit description 5-1 receiver circuits 5-1-1 antenna switching circuit (pa unit) the antenna switching circuit functions as a low-pass fi lter while receiving and a resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits. R...

  • Page 32

    5 - 2 the 2nd if signal from the 2nd mixer (ic9, pin 3) passes through the ceramic filter (fi2) to remove unwanted heterodyned frequencies. It is then amplified at the limiter amplifi er section (ic9, pin 5) and applied to the quadrature detector section (ic9, pins 10, 11) to demodulate the 2nd if s...

  • Page 33

    5 - 3 posed of microphone amplifier, compressor, scrambler, limiter, splatter fi lter, msk modulator, etc. At the microphone amplifi er section. The af signals (mic) from the microphone (mc1) are applied to the amplifier (ic23, pins 6, 7). The amplified signals are applied to the microphone amplifie...

  • Page 34

    5 - 4 (main unit; ic16; pin 3), and the “t2” signal from the d/a converter (main unit; ic12, pin 23), controlled by the cpu (main unit; ic22), is applied to the other input for reference. When antenna impedance is mismatched, the detected voltage exceeds the power setting voltage. Then the output vo...

  • Page 35

    5 - 5 5-5 other circuits 5-5-1 compander circuit (main unit) ic-f43gt/gs/f44gt/gs have compander circuit which can improve s/n ratio and become wide dynamic range. The circuit is composed in the base band ic (ic14). (1) in case of transmitting the audio signals from the microphone are applied to the...

  • Page 36

    5 - 6 input port for the ptt switch detection signal. Low: while the ptt switch is pushed. Input port for the noise signal from the fm if ic (ic9, pin 13). Outputs serial data to the pll ic (ic21, pin 15) and d/a convertor (ic12, pin 8). Outputs serial clock signal to the pll ic (ic21 pin 14), d/a c...

  • Page 37: Section 6

    6 - 1 section 6 adjustment procedure when adjusting ic-f43gt/f43gs/f44gt/f44gs, the optional cs-f33g adj adjustment software (rev. 1.0 or later), opc- 478 cloning cable (rs-232c type), opc-478u cloning cable (usb type) and a jig cable (see illustration at page 5-3) are required. ■ required test equi...

  • Page 38

    6 - 2 q : transce i ver’s connect i on state w : reload ad j ustment data e : rece i ve sens i t i v i ty measurement r : connected dc voltage measurement t : pll lock voltage measurement y : operat i ng channel select u : rf output power i : fm modulat i on balance (narrow) o : fm dev i at i on (na...

  • Page 39

    6 - 3 opc-478/opc478u jig cable to ic-f43g/f44g [sp] j ack 3-conductor 3.5(d) mm (1⁄8") plug (sp + ) (clone) (gnd) (spe – ) fm dev i at i on meter sinad meter speaker (8 Ω) aud i o generator ac m i ll i voltmeter to the antenna connector attenuator 20 db or 30 db rf power meter 0.1–10 w/50 Ω frequen...

  • Page 40

    6 - 4 check the “ lvin ” i tem on the cs-f33g adj’s screen. Check the “ lvin ” i tem on the cs-f33g adj’s screen. Loosely couple the frequency counter to the antenna con- nector. Connect the rf power meter to the antenna connector. Connect the fm dev i at i on meter w i th the osc i lloscope to the ...

  • Page 41

    6 - 5 *the output level of the standard s i gnal generator (ssg) i s i nd i cated as the ssg’s open c i rcu i t. Software adjustment (receiving) • select an operat i on us i ng [ ↑ ] / [ ↓ ] keys, then set spec i f i ed value us i ng [ ← ] / [ → ] keys on the connected computer keyboard. • need to a...

  • Page 42: Section 7

    7 - 1 section 7 parts list m.=t: mounted on the top side, b: mounted on the bottom side [main unit] ref order description m. H/v no. No. Location ic6 1110006350 s.Ic lm2902pwr b 55.4/23.8 ic8 1110005771 s.Ic s-80942cnmc-g9ct2g b 20.8/41.5 ic9 1110003201 s.Ic ta31136fng (el) t 81.5/17 ic10 1130011581...

  • Page 43

    7 - 2 [main unit] ref order description m. H/v no. No. Location r87 7030005000 s.Res erj2gej 471 x (470) t 69/34.6 r88 7030009270 s.Res erj2gej 821 x (820) t 73.1/30.9 r89 7030005050 s.Res erj2gej 103 x (10 k) t 74.2/25.2 r90 7030005170 s.Res erj2gej 474 x (470 k) t 71.1/21 r91 7030005240 s.Res erj2...

  • Page 44

    7 - 3 [main unit] ref order description m. H/v no. No. Location c17 4550007120 s.Tan f92 1d 224mpa t 78/26.3 c18 4030017510 s.Cer ecj0ec1h680j b 98.2/34.9 c19 4030017350 s.Cer ecj0ec1h020b except r , y , i , !4 , !6 , !8 b 88.6/41.2 4030017520 s.Cer ecj0ec1h0r3b r , y , i , !4 , !6 , !8 b 88.6/41.2 ...

  • Page 45

    7 - 4 [main unit] ref order description m. H/v no. No. Location c314 4030017740 s.Cer ecj0eb1e821k b 55.2/18.7 c315 4030017330 s.Cer ecj0ef1c104z b 49.2/20.6 c316 4030017420 s.Cer ecj0ec1h470j b 57.4/19.1 c317 4030017770 s.Cer ecj0eb1e332k b 59/21.7 c318 4030017690 s.Cer ecj0ec1h121j b 57.3/28.5 c31...

  • Page 46

    7 - 5 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [pa unit] ref order description m. H/v no. No. Location c707 4030017460 s.Cer ecj0eb1e102k b 26.3/17.6 c708 4030006860 s.Cer c1608 jb 1h 102k-t t 28.5/13.7 c709 4030006980 s.Cer c1608 ch 1h 070d-t r , y , i , !4 , !6 ,...

  • Page 47: Section 8

    Screw abbreviations a, b0, bt: self-tapping ph: pan head zk: black ni-zu: nickel-zinc sus: stainless 8 - 1 section 8 mechanical parts *: refer to section 10 “board layouts.” [chassis parts] ref order description qty. No. No. J1 6910015910 ant connector 104 1 j2 6910015860 imsa-6277s-o2a-g 1 sp1 2510...

  • Page 48

    8 - 2 mp2(c) mp25(c) mp30(c) mp29(c) mp33(c) mp20(c) sp1(c) mp12(c) main unit mp28(c) mp37(c) mp46(c) mp39(c) mp42(c) mp4(m) mp7(m) ds3(m) mp3(m) mp21(c) mp22(c) mp34(c) mp28(c) s27(m) r315(m) mp28(c) pa unit fuse unit mp28(c) ant unit mp1(c) j1(c) mp36(c) mp35(c) mp17(c) mp8(c) mp31(c) mp13(c) mp14...

  • Page 49: Section 9

    9 - 1 section 9 board layouts • main unit (top view) • pa unit (top view) • fuse unit (top view) • ant unit (top view) • bc-160 (top view) 1 2 sp1 (chassis) j1 (chassis) j4 j3 clone sp mic micg afout vcc gnd j2 c17 4 2 c c36 7 3 c 2 4 c 3 4 c 1 5 c c56 c57 2 6 c 6 6 c 9 6 c 0 7 c 1 7 c 2 7 c 3 7 c c...

  • Page 50

    9 - 2 h5 h10 h15 h20 h25 h30 h35 h40 h45 h50 h0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 charge to battery vsens gnd s-14108ih-p2- q printed in japan © 2004−2007 icom inc. • pa unit (bottom view) • fuse unit (bottom view) • ant unit (bottom view) • bc-160 (bottom view) [monitor]...

  • Page 51: Section 10

    10 - 1 section 10 block diagram notes : contorol line common line tx line rx line data lime voltage line lpf lpf lpf ic6: njm12902 lpf ic19: njm12902 lpf ic6: njm12902v lpf ic6: njm12902v det pwr d702: rb706f mute sw d29: ma2s111 eeprom ic10: 24lc64t reset ic8: s-80942cnmc-g9c shift sw d6: ma77 ant ...

  • Page 52: Section 11

    11 - 1 section 11 voltage diagram *; refer to “parts list.” r510 47 k r93 33 k r514 100 k +5v c35 0.0022 r512 8.2 k ic14 ak2346 9 10 11 12 24 23 22 21 agndin agnd txin txino limlv extlmin mod vss tclk tdata di/o rdf/fc test rxin rxino rxlpfo rxaf rxafin expout vdd xin xout dir sclk r513 47 k 24 23 2...

  • Page 53

    11 - 2 *; refer to “parts list.” 15.3 mhz 1.2vp-p t: 0.0 r: 4.8 t: 0.0 r: 0.3 t: 0.8 r: 1.2 t: 0.0 r: 4.8 t: 0.0 r: 4.8 t: 0.0 r: 0.9 t: 1.5 r: 1.6 t: 1.6 r: 1.4 c: 3.8 c: 3.9 t: 0.0 r: 2.0 t: 0.0 r: 4.6 t: 0.0 r: 4.4 t: 0.0 r: 1.8 t: 0.0 r: 0.6 c: 4.0 t: 0.0 r: 5.0 t: 0.0 r: 4.9 t: 5.0 r: 0.0 c: 5....

  • Page 54

    11 - 3 t: 1.7 r: 0.0 t: 0.7 r: 0.0 t: 0.7 r: 0.0 t: 5.0 r: 0.0 t: 0.9 r: 0.0 t5v apc tx j701 imsa–6176s–03a vcc pdet gnd p_det gnd vcc c733 3 p c761 0.5 p q704 2sc5006 t5v c731 3 p c762 0.5 p c729 3 p q702 rd01mus1 l706 18 nh c720 39 p r704 10 c708 0.001 l703 0.4–0.9–2tl l704 0.4–0.9–2tl d701 1sv307...

  • Page 55: Section 12

    12 - 1 section 12 bc-160 q1 2sc4081 r4 10 r18 r3 560 r5 0.12 r35 r31 10k r37 120k r28 r38 r29 1ss355 d2 d5 1ss355 c6 10 c11 0.01 c12 0.01 c8 0.01 c25 c26 c21 c22 0.1 0.01 c28 c23 c24 10k 0.1 0.01 0.01 c27 1k 39k 0.01 0.01 0.01 c1 0.001 0.01 c3 d4 d an202k c19 c16 r17 10k r16 560k r15 c18 56k 0.01 r1...

  • Page 56

    &.O3ec#heng4eh2oad4aipei4aiwan2/# 0hone &ax 52, httpwwwasiaicomcom %mailsales asiaicomcom :acdela0laine 2ue"rindejoncdes-oulinais"0 4oulouse#edex&rance 0hone &ax 52, httpwwwicomfrancecom %mailicom icomfrancecom 5nit3ea3t(erne"ay+ent#4,$5+ 0hone &ax 52, httpwwwicomukcouk %mailinfo icomukcouk #tra2ubi...

  • Page 57

    1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14108iz-c1- q © 2004−2007 icom inc..