1. DL manuals
  2. Icom
  3. Two-Way Radio
  4. IC-F3
  5. Service Manual

Icom IC-F3 Service Manual

Other manuals for IC-F3: Instruction Manual, User Manual

Summary of IC-F3

  • Page 1

    Count on us! 6-9-16, kamihigashi, hirano-ku, osaka 547-0002, japan a-5452mi-s- 1 © 1997 icom inc. Service manual vhf fm transceivers ic-f3 ic-f3s uhf fm transceivers ic-f4 ic-f4s ic - f 3 ic - f 3 s ic - f 4 ic-f4s *ic-f3/f3s,f4/f4s cover(gb) 99.6.8 3:24 pm page 1.

  • Page 2

    Repair notes 1. Make sure a problem is internal before disassembling the transceiver. 2. Do not open the transceiver until the transceiver is disconnected from its power source. 3. Do not force any of the variable components. Turn them slowly and smoothly. 4. Do not short any circuits or electronic ...

  • Page 3

    Table of contents section 1 specifications section 2 inside views 2 - 1 ic-f3/s ................................................................................................................................................2-1 2 - 2 ic-f4/s .............................................................

  • Page 4: Section 1

    All stated specifications are subject to change without notice or obligation. Frequency coverage type of emission number of channels power supply requirement tx at high current drain at low (approx.) rx rated audio stand-by frequency stability usable temperature range dimensions (proj. Not included)...

  • Page 5: Section 2

    2 - 1 f3/s section 2 inside views 2-1 ic-f3/s • main unit low-pass filter circuit current detector circuit rf amplifier (q12: 3sk239) crystal filter (fi1) t/r switching circuit (d4: ma77) 1st mixer circuit (q13: 3sk166-2) pll reference oscillator (x1: cr-575, 15.3 mhz) cpu (ic8) eeprom (ic7) vco cir...

  • Page 6

    F4/s 2 - 2 2-2 ic-f4/s • main unit low-pass filter circuit current detector circuit rf amplifier (q12: 3sk239) crystal filter (fi1) t/r switching circuit (d4: ma77) pll reference oscillator (x1: 15.3 mhz) cpu (ic8) eeprom (ic7) vco circuit apc control circuit mute switch (ic4: bu4066bcfv) pll ic (ic...

  • Page 7: Section 3

    3 - 1 section 3 disassembly instructions 3-1 disassembly instruction • removing the chassis panel q unscrew 1 nut a , and remove 1 knob b . W unscrew 2 screws, c . E take off the chassis in the direction of the arrow. R unplug j6 to separate front panel and chassis. • removing the main unit q remove...

  • Page 8

    3 - 2 3-2 optional unit installations 1 remove the option cover. 2 remove the bottom protective paper of sponge. 3 connect either a ut-80, ut-96 or ut-105 optional unit to j5. 4 attached the 1556 sponge to the specified position at the unit as following illustration. 5 replace the option cover to th...

  • Page 9: Section 4

    Section 4 circuit description 4 - 1 4-1 receiver circuits 4-1-1 antenna switching circuit received signals are passed through the low-pass filter (l1–l3, c1–c7 for ic-f3/s, l1–l3, c3, c5, c7 for ic-f4/s). The filtered signals are applied to the λ ⁄ 4 type antenna switching circuit (d8 for ic-f3/s d4...

  • Page 10

    4 - 2 the applied af signals are amplified at the af power ampli- fier circuit (ic5, pin 4) to obtain the specified audio level. The amplified af signals, output from pin 10, are applied to the internal speaker (sp1) via the [sp] jack when no plug is con- nected to the jack. 4-1-6 squelch circuit a ...

  • Page 11

    4 - 3 the signal output from the current sensor circuit (q9, q28; ic-f3/s) or the power detector circuit (d2; ic-f4/s) is applied to the differential amplifier (ic3a, pin 2), and the “t4” signal from the expander (ic10, pin 14), controlled by the cpu (ic8), is applied to the other input for referenc...

  • Page 12

    4 - 4 4-5 cpu port allocations 4-5-1 cpu (ic8) cpu (ic8) — continued pin number 1 11 12 13 14 15 18 19 26 36–41 (ic-f3/s) 40, 41 (ic-f4/s) 42 43 44–47 48 49 50 51 52 53 54 60–62 63 port name ctcin csift sck si so unlk plst nois cont ks0–ks5 ks4, ks5 mm rm kr0–kr5 r5c s5c txc t5c light afon dst ctda0...

  • Page 13: Section 5

    5 - 1 f3/s f4/s section 5 adjustment procedures 5-1 preparation ■ required test equipment equipment dc power supply rf power meter (terminated type) frequency counter fm deviation meter digital multimeter grade and range output voltage : 9.6 v dc current capacity : 5 a or more measuring range : 1–10...

  • Page 14

    5 - 2 f3/s f4/s • screen display example • connections note: the above values for settings are examples only. Each transceiver has its own specific values for each setting. * do not change the value when adjusting the ic-f4/s . A value of 80 is necessary for the ic-f4/s. Memory ch : 1 power(lo) : 72...

  • Page 15

    5 - 3 5-2 pll adjustment for ic-f3/s pll lock voltage 1 2 • operating freq. : 150.000 mhz (l-band) 174.000 mhz (h-band) • transmitting • receiving main connect a multi-meter to check point cp1. 3.0 v (l-band) 4.3 v (h-band) 2.2–3.2 v (l-band) 3.1–4.1 v (h-band) main l11 verify adjustment adjustment ...

  • Page 16

    5 - 4 select an operation using [ ↑ ]/[ ↓ ] keys, then set the specified value using [ ← ]/[ → ] keys on the connected computer keyboard. *this output level of a standard signal generator (ssg) is indicated as ssg’s open circuit. Reference frequency output power fm deviation bpf1–bpf4 convenient: th...

  • Page 17

    The following adjustment must be performed after “reference frequency adjustment” in section 5-3. 5 - 5 set to flat wave form 5-4 transmitter adjustment for ic-f3/s dtcs wave form 1 • operating freq. : 143.000 mhz (l-band) 160.000 mhz (h-band) • high/low switch : low • no audio applied to the [mic] ...

  • Page 18

    5 - 6 f3/s the following adjustment must be performed after “bpf1–bpf4 adjustment” in section 5-3. 5-5 receiver adjustment for ic-f3/s squelch level 1 2 • operating freq. : 136.000 mhz (l-band) 146.000 mhz (h-band) • set the ssg as: modulation : 1khz deviation : ±3.5 khz (w-type) ±1.75 khz (n-type) ...

  • Page 19

    5 - 7 f4/s 5-6 pll adjustment for ic-f4/s pll lock voltage 1 2 3 4 • operating freq. : 400.000 mhz (l-band) 440.000 mhz (ml-band) 470.000 mhz (mh-band) 490.000 mhz (h1/h2-bands) • receiving • transmitting • operating freq. : 430.000 mhz (l-band) 470.000 mhz (ml-band) 500.000 mhz (mh-band) 512.000 mh...

  • Page 20

    5 - 8 f4/s select an item using [ ↑ ]/[ ↓ ] keys on the connected computer keyboard. *this output level of a standard signal generator (ssg) is indicated as ssg’s open circuit. 5-7 trimmer adjustment for ic-f4/s reference frequency output power bpf1–bpf4 1 2 1 2 3 4 1 • operating freq. : 400.000 mhz...

  • Page 21

    5 - 9 f4/s • main unit connect (soldering) here dc power supply , . See detailed illustration below power supply connection vr board connect (soldering) , line here r150 dtcs wave form adjustment r119 frequency deviation adjustment fm deviation meter oscilloscope rf power meter attenuator audio gene...

  • Page 22

    5 - 10 f4/s the following adjustment must be performed after “bpf1–bpf4 adjustment” in section 5-7. 5-9 receiver adjustment for ic-f4/s squelch level 1 2 • operating freq. : 400.000 mhz (l-band) 440.000 mhz (ml-band) 470.000 mhz (mh-band) 490.000 mhz (h1/h2-bands) • set the ssg as: modulation : 1 kh...

  • Page 23: Section 6

    S.=surface mount Ò : l-band, Ó : h-band, n : n-type, m : m-type, w : w-type e : ets/cept version, u : eia/tia version [main unit] 6-1 ic-f3/f3s [main unit] ic1 1130007610 s.Ic µpd3140gs-e1 (ds8) ic2 1110003490 s.Ic ta31136fn (d,el) ic3 1110003780 s.Ic njm2902v-te1 ic4 1130008090 s.Ic bu4066bcfv-e1 i...

  • Page 24

    S.=surface mount Ò : l-band, Ó : h-band, n : n-type, m : m-type, w : w-type e : ets/cept version, u : eia/tia version r115 7030003690 s.Resistor erj3geyj 124 v (120 k Ω ) r116 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r117 7030003460 s.Resistor erj3geyj 152 v (1.5 k Ω ) r119 7310004140 s.Trimmer...

  • Page 25

    S.=surface mount Ò : l-band, Ó : h-band, n : n-type, m : m-type, w : w-type e : ets/cept version, u : eia/tia version [main unit] [main unit] r215 7030005520 s.Resistor rr0816r-334-d (330 k Ω ) r216 7030005630 s.Resistor rr0816r-154-d (150 k Ω ) r217 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r21...

  • Page 26

    S.=surface mount Ò : l-band, Ó : h-band, n : n-type, m : m-type, w : w-type e : ets/cept version, u : eia/tia version [main unit] [main unit] c119 4030008680 s.Ceramic c2012 jf 1c 105z-t-a c120 4030011600 s.Ceramic c1608 jb 1c 104kt-n c121 4030007170 s.Ceramic c1608 ch 1h 221j-t-a c122 4030007170 s....

  • Page 27

    S.=surface mount [main unit] j2 6450001680 connector hsj1122-010010 j3 6450001690 connector hsj1456-01-220 j4 6450000870 connector hec2711-01-020 j5 6510018430 s.Connector axn330c038p j6 6510007080 connector pi28a-02m j7 6910010850 connector imsa-9230b-1-05z080-t ds1 5030001460 lcd lm-1462b ds2 5010...

  • Page 28

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] 6-2 ic-f4/f4s [main unit] ic1 1130007610 s.Ic µpd3140gs-e1 (ds8) ic2 1110003490 s.Ic ta31136fn (d,el) ic3 1110003780 s.Ic njm2902v-te...

  • Page 29

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] [main unit] r1 7030003670 s.Resistor erj3geyj 823 v (82 k Ω ) r2 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r3 7030003440 s.Resis...

  • Page 30

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] [main unit] r204 7030003500 s.Resistor erj3geyj 332 v (3.3 k Ω ) r205 7030003460 s.Resistor erj3geyj 152 v (1.5 k Ω ) r207 7030003640...

  • Page 31

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] [main unit] c25 4030009910 s.Ceramic c1608 ch 1h 040b-t-a c26 4030006850 s.Ceramic c1608 jb 1h 471k-t-a c27 4030009920 s.Ceramic c160...

  • Page 32

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] [main unit] c169 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c170 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c171 4030006860 s.Ceramic c...

  • Page 33

    [l]: l-band, [ml]: ml-band, [mh]: mh-band, [h1]: h1-band, [h2]: h2-band s.=surface mount n : n-type, w : w-type, e : ets/cept version, u : eia/tia version [main unit] c436 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c438 4030008630 s.Ceramic c1608 jf 1c 104z-t-a c439 4030008630 s.Ceramic c1608 jf 1c 1...

  • Page 34: Section 7

    7 - 1 f3/s f4/s mp1 8010016822 1922 chassis-2 1 mp2 8210014561 1922 front panel assembly-1 (f3) 1 8210015151 2065 front panel assembly-1 (f3s) 1 mp4 8210014330 1922 contact base 1 mp5 8610010420 knob n-261 1 mp6 8930042110 1922 10-key (f3) 1 8930043970 2065 7-key (f3s) 1 mp7 8930042070 1922 mic cap ...

  • Page 35

    7 - 2 7-2 accessories ep1 optional product antenna fa-sc24v-1 (f3/s: l-band) 1 optional product antenna fa-sc54v-1 (f3/s: h-band) 1 optional product antenna fa-sc24u-1 (f4/s: l-band) 1 optional product antenna fa-sc56u-2 (f4/s: ml-band) 1 antenna fa-sc71u-2 (f4/s: mh, h 1 and h 2 bands) 1 ep2 option...

  • Page 36

    8 - 1 section parts list section 8 semi-conductor informations 8-1 transistors and fets 8-2 diodes name symbol inside view name symbol inside view 2sa1362 - gr aeg 2sa1588 - gr zg c b e 2sb1132 - r bar b e c c 2sc2712 - y ly 2sc2714 - y qy 2sc3585 r44 r44 2sc4081 - r br 2sc4116 - bl lb 2sc4215 - o q...

  • Page 37

    F3/s the combination of this page and the next page shows the unit layout in the same configuration as the actual p.C. Board. Batt volin volout gnd vcc to main unit j7 9 - 2 vr board (common) • top view 9 - 1 section 9 board layouts 9-1 ic-f3/s main unit • top view vcc vol gnd vol out vol in hv to v...

  • Page 38

    F3/s 9 - 2 • bottom view pttin pttout micout micin nc nc nc sigout opt1 opt2 opt3 gnd nc nc nc gnd 5 v vcc micmute afonop beepout rxmute discin afout nc ccs cirq so si sck to optional unit j4 charger clone sp af out opt mic ext. Mic j2 ext. Sp j3 ptt switch batt volin volout gnd vcc to main unit j7 ...

  • Page 39

    F4/s the combination of this page and the next page shows the unit layout in the same configuration as the actual p.C. Board. 9 - 3 9-3 ic-f4/s main unit • top view vcc vol gnd vol out vol in hv to vr unit sp spg p1 antenna speaker sp1 microphone mc1.

  • Page 40

    F4/s 9 - 4 • bottom view note: *1 ..... *2 ..... L413 [mh], [h 1 ], [h 2 ] r470 [l], [ml] r460 [mh], [h 1 ], [h 2 ] l417 [l], [ml] pttin pttout micout micin nc nc nc sigout opt1 opt2 opt3 gnd nc nc nc gnd 5 v vcc micmute afonop beepout rxmute det afout nc ccs cirq so si sck to optionl unit j4 charge...

  • Page 41: Section 10

    10 - 1 section 10 block diagrams 10-1 ic-f3/s optional unit mic, af, ptt, mm, rm, afonop, sigout ptt ptt cont mic r105, c133 common line rx line tx line mic amp ic3c ic3b hpf ic4 analog switch ic3d lpf ctcss tone mm rm 5 v r5 s5 vcc t5 q18 q21 q20 q22 af reg q15 vcc af amp ic5 sp vr mic jack af out ...

  • Page 42

    Optional unit mic, af, ptt, mm, rm, afonop, sigout ptt ptt cont mic common line rx line tx line mic amp ic3c ic3b hpf ic4 analog switch ic3d lpf ctcss tone mm rm 5 v r5 s5 vcc t5 q18 q21 q20 q22 af reg de enpha q15, q16, d26 vcc af amp ic5 sp vr mic jack af out sp clone det ext. Mic sp jack charge l...

  • Page 43

    J6 p1 sp spg 0.001 c164 1 2 1 2 main unit kuc3523-040245 mc1 j5 pttin pttout micout micin afonop beepout discin sigout afout oppd opcs opint iroch w7 w8 a b 1 2 3 5 4 so si mm rm mic q29 xp1213 33k r144 r142 100 0.001 c163 jpm1990-2013r s1 1 2 3 4 5 hv vol in vol out vol gnd vcc vr rv-312 r1 vr boar...

  • Page 44: Complete View

    C265 47p c264 47p r237 1k × 4 r245 100k r238 100k r236 1k × 4 c266 47p c267 47p c226 0.047 c246 0.033 c272 47p c269 47p c268 47p c270 47p c271 47p dst dusf ctda t5c s5c r5c afon txc rm mm 75 seg40 74 seg39 73 seg38 72 seg37 71 70 seg35 seg34 seg33 seg31 seg30 seg29 ctda2 ctda0 ctda1 69 68 67 66 65 6...

  • Page 45

    C18 note [ l ]..... L-band [h]..... H-band e .... Ets/cept version u .... Eia/tia version [ w ]..... W-type [ m ]..... M-type [ n ]..... N-type ant c265 47p c264 47p r237 1k × 4 r236 1k × 4 c266 47p c267 47p c226 0.047 c246 0.033 c272 47p c269 47p c268 47p c270 47p c271 47p dst dusf ctda t5c s5c r5c...

  • Page 46

    J6 p1 sp spg 0.001 c164 1 2 1 2 c18 main unit note [ l ]..... L-band [h]..... H-band e .... Ets/cept version u .... Eia/tia version [ w ]..... W-type [ m ]..... M-type [ n ]..... N-type kuc3523-040245 mc1 j5 pttin pttout micout micin afonop beepout discin sigout afout oppd opcs opint iroch w7 w8 a b...

  • Page 47

    J6 p1 sp spg spg 47p c164 1 2 1 2 main unit ic-f4 only ic-f4s=open kuc3523-040245 mc1 gnd j5 1 30 15 16 pttin pttin 5v pttout pttout vcc micout micout micmute micin micin afonop afonop nc beepout beepout nc rxmute nc det sigout sigout afout afout opt1 oppd nc opt2 ccs opt3 opcs opint u/d w7 cirq gnd...

  • Page 48: Complete View

    R433 1k × 4 r431 1k × 2 r432 100k r237 100k r236 1k c442 47p c441 0.1 c440 0.1 c438 0.1 c439 0.1 c257 47p dusf dst dst afon afon light light t5c t5c txc 75 seg40 74 seg39 73 seg38 72 seg37 71 70 seg35 seg34 seg33 seg31 seg30 seg29 ctda2 ctda0 ctda1 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 ...

  • Page 49

    C18 c481 ant. C442 47p c441 0.1 dst afon ht t5c 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 lnj310m6ura ds2 lnj310m6ura lnj808r8era ds3 ds4 2sc2712 q25 3.3k 1.5k r205 r204 100 r155 r183 560 com1 com2 com3 com4 com4 com3 com2 com1 seg29 seg30 seg31 seg33 seg34 seg35 seg37 seg38 ...

  • Page 50

    J6 p1 sp spg spg 47p c164 1 2 1 2 c18 c481 main unit ic-f4 only ic-f4s=open kuc3523-040245 mc1 gnd j5 1 30 15 16 pttin pttin 5v pttout pttout vcc micout micout micmute micin micin afonop afonop nc beepout beepout nc rxmute nc det sigout sigout afout afout opt1 oppd nc opt2 ccs opt3 opcs opint u/d w7...

  • Page 51

    Repair notes 1. Make sure a problem is internal before disassembling the transceiver. 2. Do not open the transceiver until the transceiver is disconnected from its power source. 3. Do not force any of the variable components. Turn them slowly and smoothly. 4. Do not short any circuits or electronic ...

  • Page 52

    6-9-16, kamihigashi, hirano-ku, osaka 547-0002, japan dual band fm transceiver ic-2800h ic-2800h a-5452mi-s- q © 1997 icom inc..