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Icom IC-A110 Service Manual

Summary of IC-A110

  • Page 1

    Service manual vhf air band transceiver ia110

  • Page 2

    Ordering parts be sure to include the following four points when ordering replacement parts: 1. 10-digit order numbers 2. Component part number and name 3. Equipment model name and unit name 4. Quantity required 1130008830 s.Ic tb31207afn ic-a110 main unit 5 pieces 8810009130 screw bt m3x12 ni-zu ic...

  • Page 3

    Table of contents section 1 specifications section 2 inside views section 3 circuit description 3 - 1 receiver circuits............................................................................................................................. 3 - 1 3 - 2 transmitter circuits .........................

  • Page 4: Section 1

    1 - 1 section 1 specifications ‘ ‘ general • frequency coverage : 118.000–136.975 mhz • channel spacing : 25 khz [gen], [gen-1] 25 khz/8.33 khz [usa], [usa-1] • type of emission : am (6k00a3e) • number of memory channels : 20 channels • antenna connector : so-239 (50 Ω ) • power supply requirement :...

  • Page 5

    Low-pass filter antenna switching circuit crystal band pass filter (fi1: fl-306) ceramic band pass filter (fi3: cfwm450d) ceramic band pass filter (fi4: cfg450h [usa/-1] only) vco circuit apc amplifier (q11: 2sc4081) crystal band pass filter (fi2: fl-307 [usa/-1] only) power complifier (q51: mrf137)...

  • Page 6: Section 3

    3 - 1 section 3 circuit description 3-1 receiver circuits 3-1-1 antenna switching circuit the antenna switching circuit functions as a low-pass filter while receiving. However, its impedance becomes very high while d1 and d2 are turned on. Thus transmit signals are blocked from entering the receiver...

  • Page 7

    3 - 2 3-1-5 am detector circuit (main unit) the am detector circuit converts the 2nd if signal into af signals. The amplified 2nd if signal from the 2nd if amplifier (q6) is applied to the am detector circuit (q7). It is then detected for conversioin to af signals. The af signals are applied to the ...

  • Page 8

    3 - 3 3-2 transmitter circuits 3-2-1 microphone amplifier circuit (main unit) the microphone amplifier circuit amplifies audio signals from the microphone, within +6 db/octave pre-emphasis characteristics (300 hz–3 khz), to a level needed for the modulation circuit. The af signals from the microphon...

  • Page 9

    3 - 4 3-3 pll circuit 3-3-1 general (main unit) a pll circuit provides stable oscillation of the transmit fre- quency and receive 1st lo frequency. The pll output com- pares the phase of the divided vco frequency to the refer- ence frequency. The pll output frequency is controlled by the divided rat...

  • Page 10

    3 - 5 3-4 power supply circuits voltage lines (main unit) line vcc 8v +5v cpu5v t8 r8 description the voltage from the external dc power con- nector which is controlled by the power switch ([vol] control). Common 8 v converted from the vcc line by the +8 v regulator circuit (ic29). The output voltag...

  • Page 11

    Description input ports for the key matrix. Input port for the cpu reset signal. Outputs control signal for the power supply circuit. High: power is on. Outputs beep audio signals. Outputs clock signal to the eeprom (front unit; ic4, pin 6). Outputs data signal to the eeprom (front unit; ic4, pin 5)...

  • Page 12

    4-1 preparation • some versions may need the optional cs-a110 cloning software and opc-478, opc-592 cloning cable for setting the adjustment frequency. • all adjustments must be performed on the [wide] mode. ■ required test equipment 4 - 1 section 4 adjustment procedures ■ vfo channel id list • chan...

  • Page 13

    4 - 2 to the e xter nal speak er jac k to the antenna connector speaker (8 Ω ) to the microphone connector cloning connection standard signal generator (ssg) 0.1–300 mhz –127 to –17 dbm (0.1 µ v to 32 mv) rf power meter 50 Ω , 1–50 w audio generator 300 hz to 3 khz ac millivoltmeter modulation analy...

  • Page 14

    4 - 3 4-2 pll adjustment vdd voltage pll lock voltage tune voltage reference frequency adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 1 2 1 1 • operating frequency : 118.000 mhz • receiving • operating frequency : 118.000 mhz • receiving • transmitting...

  • Page 15

    4 - 4 dc power supply 13.75 v/10 a r392 vdd voltage adjustment q51 vdd voltage check point r336 head set modulation adjustment cp1 tune voltage check point r59 tune voltage adjustment l40 pll lock voltage adjustment for tx l41 pll lock voltage adjustment for rx x1 reference frequency adjustment cp2 ...

  • Page 16

    4 - 5 4-4 receiver adjustment “squelch adjustment” must be performed at “squelch adjustment mode”. Rx sensitivity squelch adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 2 1 2 3 • operating frequency : 118.000 mhz • pre-set l9, l10, l11, l49 on the main...

  • Page 17

    4 - 6 dc power supply 13.75 v/10 a l9 r59 l49 l10 l11 rx sensitivity adjustment.

  • Page 18: Section 5  Parts List

    5 - 1 s.=surface mount ic1 1140008780 s.Ic hd6433823a19d ic2 1130009110 s.Ic s-80942anmp-dd6-t2 ic3 1130007110 s.Ic tc7w04fu (te12l) ic4 1130008670 s.Ic 25lc160t-i/sn ic5 1130007510 s.Ic bu4094bcfv-e1 q1 1590000440 s.Transistor dta143zua t106 q2 1510000880 s.Transistor 2sa1622-6-tl q3 1530003280 s.T...

  • Page 19

    5 - 2 s.=surface mount ic2 1130008830 s.Ic tb31207afn (el) ic4 1110003670 s.Ic ba3308f-t1 ic5 1110002750 s.Ic ta75s01f (te85r) ic6 1130004200 s.Ic tc4s66f (te85r) ic7 1180000800 s.Ic s-81350hg-kd-t1 ic11 1110002400 s.Ic njm2107f-te1 ic13 1130008370 s.Ic tc9260f (hr) ic15 1110005010 s.Ic mc33063ad ic...

  • Page 20

    5 - 3 s.=surface mount l36 6140000670 coil lr-89 l39 6200004480 s.Coil mlf1608d r82k-t l40 6200009080 s.Coil mc152-e558cn-100025=p3 l41 6200004850 s.Coil mc152-e558cn-100024 l42 6200004480 s.Coil mlf1608d r82k-t l43 6200004480 s.Coil mlf1608d r82k-t l48 6110001600 coil la-243 l49 6150005000 s.Coil l...

  • Page 21

    5 - 4 s.=surface mount r236 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r237 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r238 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r239 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r240 7030003600 s.Resistor erj3geyj 223 v (22 k Ω ) r241 7030003600 s...

  • Page 22

    [main unit] [main unit] s.=surface mount c8 4030007080 s.Ceramic c1608 ch 1h 390j-t-a c9 4030007040 s.Ceramic c1608 ch 1h 180j-t-a c10 4030007100 s.Ceramic c1608 ch 1h 560j-t-a c11 4030011260 s.Ceramic grm42-6 w5r 102k 500pt c12 4030011180 s.Ceramic grm42-6 ch 220j 500pt c13 4030011020 s.Ceramic grm...

  • Page 23

    [main unit] [main unit] s.=surface mount c288 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c289 4030011600 s.Ceramic c1608 jb 1c 104kt-n c290 4030011600 s.Ceramic c1608 jb 1c 104kt-n c292 4030008920 s.Ceramic c1608 jb 1c 473k-t-a c293 4030010760 s.Ceramic c1608 ch 1h 331j-t-a c295 4030006860 s.Ceramic ...

  • Page 24

    [main unit] s.=surface mount c538 4030007140 s.Ceramic c1608 ch 1h 121j-t-a c539 4030007010 s.Ceramic c1608 ch 1h 100d-t-a c540 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c541 4030011600 s.Ceramic c1608 jb 1c 104kt-n c542 4030011600 s.Ceramic c1608 jb 1c 104kt-n c543 4030011600 s.Ceramic c1608 jb 1c ...

  • Page 25

    J7 6450000140 connector hsj0807-01-010 1 w1 8900009210 cable opc-905 1 mp1 8510011660 2088 vco case 1 mp2 8930013590 alumi sheet n 1 mp3 8510012940 2270 if fil sheild 1 mp4 8510012950 2270 a-shield plate 1 mp5 8510012920 2270 b-shield plate 1 mp6 8510012910 2270 rug 1 mp7 8930051860 2270 a-sheet 1 m...

  • Page 26

    6 - 2 mp5 (c) mp5 (c) mp8 (c) mp3 (m) main unit mp11 (c) j7 (m) mp19 (c) mp18 (c) mp1 (f) mp3 (f) mp4 (f) mp2 (f) ds1 (f) ep2 (f) j2 (f) front unit mp10 (f) mp17 (c) mp4 (c) mp12 (c) j1 (c) mp1 (c) mp9 (c) unit abbreviations (f): front unit (m): main unit (c): chassis parts mp7 (c) mp8 (f) mp7 (c) m...

  • Page 27

    B e c b e c b e c b e c b c e b c e b e c b e c b e c b e c b e c b e c b e c b e c b e c b e c g s d g s d d g s b e c b e c b e c b e c b e c b e c e1 b1 b2 c1 c2 b1 e b2 c1 c2 e1 c2 b1 c1 e2 b2 g2 g1 s d g2 g1 d s g s s d g s d g d s s1 g1 s2 g2 d1 d1 d2 d2 g s d • transistors and fet’s 2sa1471r ...

  • Page 28

    Hang mic ptt clon gnd mice afo 8v v/m scan pri sql i mp2 8 - 1 section 8 board layouts the combination of this page and the next page show the unit layout in the same configuration as the actual p.C.Board. 8-1 front unit ¡ top view.

  • Page 29

    1 3 4 5 80 1 61 60 41 40 21 20 1 4 5 8 1 4 5 8 1 8 9 16 w1 w2 spe sp gnd gnd spe spe sp sp 8v vcc 5v trc tmut pswc cpu5v mice mic ptt ptts gnd gnd gnd gnd gnd rmut afmut smut vcs sck so beep fisw unlk plstb so sck r/t pdet sqli gnd gnd gnd 2 40 1 39 j1 from main unit j5 8 - 2 ¡ bottom view.

  • Page 30

    1 10 11 20 1 12 1 4 5 8 1 10 11 20 1 3 4 5 mp1 1 1 3 3 4 4 5 5 1 3 4 5 mp4 mp8 mp5 ext sp red black w1 w4 w2 w3 gnd gnd spe spe sp sp 8v vcc 5v trc tmut pswc cpu5v mice mic ptt ptts gnd gnd gnd gnd gnd rmut afmut smut vcs sck so beep fisw unlk plstb so sck r/t nc sqli gnd gnd gnd 2 40 1 39 j5 to fro...

  • Page 31

    4 4 5 5 1 1 3 3 1 4 5 8 1 4 5 8 1 4 5 8 1 4 5 8 1 4 5 8 1 8 9 16 1 3 4 5 1 7 8 14 1 4 5 8 1 8 16 9 1 7 8 14 1 4 5 8 1 4 5 8 1 4 5 8 1 8 9 16 mp3 w36 (red) w37 (black) ¡ bottom view 8 - 4.

  • Page 32

    If agc rf agc tune rssi trc sqli dc power supply pswc cpu rmute r/t tmute ledc1 ledc2 ds1 hlc7453-012400 front unit main unit +8v trc rx common line tx data bus line fisw extmic eptt +5v ptts lcd sp hang mic ptt +8v clone i/o af out tmut vco dc-dc convertor tx:118.0~136.975mhz rx:79.15~98.125mhz 2nd...

  • Page 33

    Ts power vup vdn v/m scan sql 8v clon afo ptt mice mic gnd hang sqli pdet mic mice vcc gnd gnd gnd gnd gnd gnd ptt ptts gnd r/t spe spe sp sp pri from main kr1 kr2 kr1 kr2 seg24 8v seg23 seg22 seg21 seg20 seg19 kr4 seg18 seg17 seg16 pswc seg15 beep seg14 seg13 eck seg12 eso seg11 ecs seg10 dla seg9 ...

  • Page 34

    R34 1.8k c46 note u: [usa/-1] only 0.01 c224 0.1 r288 1k c390 0.1 d44 ma8051 r327 150 c156 0.1 c315 0.01 c44 0.1 1 2 3 4 5 6 7 8 oscin oscout mixout vcc ifin dec filout filin mixin gnd n-rec n-det rssi ifout quad afout ic40 ta31136fn 16 15 14 13 12 11 10 9 c42 0.01 c43 0.001 q3 2sc4215 c170 1 d50 1s...

  • Page 35

    Q1 3sk184 r15 47 c26 0.001 c25 0.001 r13 100k r12 270k r1 1 1m c358 47p l49 ls-527 d37 hvu350 c359 22p r289 220k c406 5p d6 hvu350 c405 3.5p l9 ls-527 c342 4p l8 0.27uh c21 10p l27 0.27uh c164 10p c165 27p c10 56p r295 180 d38 1sv271 c366 0.001 l52 0.82uh r9 220k c22 22p c360 0.001 r297 470k q73 2sc...

  • Page 36

    R34 1.8k c46 note u: [usa/-1] only 0.01 c224 0.1 r288 1k c390 0.1 d44 ma8051 r327 150 c156 0.1 c315 0.01 c44 0.1 1 2 3 4 5 6 7 8 oscin oscout mixout vcc ifin dec filout filin mixin gnd n-rec n-det rssi ifout quad afout ic40 ta31136fn 16 15 14 13 12 11 10 9 c42 0.01 c43 0.001 q3 2sc4215 c170 1 d50 1s...

  • Page 37

    6-9-16, kamihigashi, hirano-ku, osaka 547-0002, japan phone : 06 6793 5302 fax : 06 6793 0013 communication equipment himmelgeister str. 100, d-40225 düsseldorf, germany phone : 0211 346047 fax : 0211 333639 url : http://www.Icomeurope.Com unit 9, sea st., herne bay, kent, ct6 8ld, u.K. Phone : 0122...

  • Page 38

    6-9-16, kamihigashi, hirano-ku osaka 547-0002, japan s-13608hi-cd c 2000 icom inc..