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Icom IC-R2 Service Manual

Other manuals for IC-R2: Instruction Manual, Instruction Manual
Manual is about: COMMUNICATIONS RECEIVER

Summary of IC-R2

  • Page 1

    Service manual communications receiver.

  • Page 2

    Introduction danger ordering parts repair notes this service manual describes the latest service information for the ic-r2 at the time of publication. Never connect the receiver to an ac outlet or to a dc power supply that uses more than 3.5 v. Such a connection could cause a fire hazard and/or elec...

  • Page 3

    Section 1 specifications section 2 inside views section 3 disassembly instructions section 4 circuit description 4-1 receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 4-2 pll circuits . . . . . . . . . . . . . . . . . . . ....

  • Page 4: Section 1

    Section 1 specifications 1 - 1 m general • frequency range : • mode : fm, wfm, am • no. Of memory channel : 450 channel • frequency stability : ±6 ppm max. (–10˚c to +60˚) • tuning steps : 5, 6.25, 10, 12.5, 15, 20, 25, 30, 50, and 100 khz • anntena impedance : 50 Ω • power supply requirement : 2 × ...

  • Page 5: Section 2

    Section 2 inside views • logic unit 2 - 1 • rf unit af power amplifier (ic15: ta31056f) af mute switch (q37: 2sj144) af filter (q30: xp6501) +3.2 regurater (ic4: s-81332h) 2nd mixer (ic10: µ pc2757t) if amplifer (q5: 2sc5231) fm if ic (ic2: ta31136fn) pll circuit pll ic (ic3: µ pd3140gs) pll referen...

  • Page 6: Section 3

    Section 3 disassembly instructions 3 - 1 • removing the rear panel 1 unscrew 2 screws, a . 2 remove the rear panel in the direction of the arrow. • removing the rf unit 1 unscrew 1 screw, b . 2 remove 1 knob, c . Unscrew 2 nuts, d and e . 3 unsolder 5 points, f , and then remove the rf unit. • remov...

  • Page 7: Section 4

    Section 4 circuit description 4 - 1 4-1 receiver circuits 4-1-1 antenna switching circuit (rf unit) the rf signals from the antenna connector pass through the limitter (d68) and an attenuator (d69). The signals are then applied to the rf circuit the antenna switching circuit (d13, d73, d75) which su...

  • Page 8

    4 - 2 ic2 contains the 3rd mixer, limiter amplifier, quadrature detector and s-meter detector, etc. A frequency from the pll reference oscillator is used for the 3rd lo signal (19.20 mhz). (1) fm mode the 3rd if signal is output from fm if ic (ic2, pin 3) and passes through the ceramic bandpass filt...

  • Page 9

    4 - 3 • tone squelch the tone squelch circuit detects af signals and opens the squelch only when receiving a signal containing a matching subaudible tone (ctcss). When tone squelch is in use, and a signal with a mismatched or no subaudible tone is received, the tone squelch circuit mutes the af sign...

  • Page 10

    4 - 4 line batt vp r3v +3s +3v description the voltage from the attached battery. Common 13 v converted from batt line by the dc-dc convertors (ic10 and d3, d5, d15). The output voltage is applied to the pll circuit (rf unit). Receive 3v controlled by the r3v regulator cir- cuit (q4) using the “rx” ...

  • Page 11

    Pin port description number name pin port description number name 4 - 5 26 27 28 29 30 31 32 33 39 42 43 44, 45 46 47 48 50 51 52 53 54 light +3sc powerc b3 b2 b1 ksql reset eda pck/is eck/i3 i2, i1 pstb pda dbl2 300mc gc 800mc uhfc vhfc output lcd backlight control signal. High : lights on outputs ...

  • Page 12: Section 5

    5 - 1 5-1 preparation the receiver (ic-r2) must be adjusted on the adjustment mode after programmed adjustment frequency data into memory chan- nel. When you program adjustment frequency data into memory channel, optional cs-r2 programming software , opc-478 cloning cable are requird . ‘ ‘ required ...

  • Page 13

    5 - 2 ■ connection dc power supply 3.0 v/1.0 a - + standard signal generator ad-92sma optional sma–bnc adaptor 1/8" (3.5 mm) 3-conductor plug terminator for the entering adjustment mode 68 k Ω - + to [sp] jack.

  • Page 14

    5 - 3 5-2 pll adjustment 1st vco lock voltage (shift on) (shift off) 2nd vco lock voltage reference frequency detector output voltage adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 2 1 2 1 2 1 1 • displayed frequency : 493.300 mhz • receiving • display...

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    5 - 4 l21 detector output voltage adjustment lv1 1st vco lock voltage check point quad detector output voltage check point lv2 2nd vco lock voltage check point f pll reference frequency check point.

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    5 - 5 5-3 receiver adjustment vhf sensitivity uhf sensitivity s-meter adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 1 1 2 3 4 5 6 • displayed frequency : (tk ch) 145.600 mhz • connect an ssg to the antenna connector and set as : level : 1 µv * (–107 d...

  • Page 17

    5 - 6 sen vhf and uhf sensitivity check point..

  • Page 18: Section 6 Parts List

    S.=surface mount ic1 1130008970 s.Ic hd74lv00tell ic2 1130009020 s.Ic x25650s8i-2.5t6 ic3 1180001820 s.Ic xc62fp3002mr ic4 1180001720 s.Ic s-81332hg-kc-t1 ic5 1110004620 s.Ic s-80725sl-an-t1 ic9 1110003800 s.Ic njm2904v-te1 ic10 1110004790 s.Ic xc6371a351pr ic11 1140007760 s.Ic m38267m8l-218gp [usa]...

  • Page 19

    S.=surface mount c1 4030014200 s.Ceramic ecue1h101jcq c3 4030013970 s.Ceramic c1005 jb 0j 104k-t-n c4 4550006760 s.Tantalum temsvb2 1a 336m-8r c5 4030013850 s.Ceramic ecue1e102kbq c6 4030008680 s.Ceramic c2012 jf 1c 105z-t-a c8 4030014120 s.Ceramic ecue1h100ccq c9 4030014120 s.Ceramic ecue1h100ccq c...

  • Page 20

    S.=surface mount d25 1790001620 s.Diode isv308 (tpl3) d29 1790001620 s.Diode isv308 (tpl3) d31 1790000850 s.Diode ma132wk (tx) d32 1790001620 s.Diode isv308 (tpl3) d34 1790001620 s.Diode isv308 (tpl3) d36 1790001620 s.Diode isv308 (tpl3) d42 1790001260 s.Diode ma2s077-(tx) d43 1790001260 s.Diode ma2...

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    S.=surface mount r100 7030008010 s.Resistor erj2gej 123x (12 k Ω ) r101 7030005240 s.Resistor erj2gej 473 x (47 k Ω ) r102 7030007290 s.Resistor erj2gej 222 x (2.2 k Ω ) r103 7030005050 s.Resistor erj2gej 103 x (10 k Ω ) r104 7030005040 s.Resistor erj2gej 472 x (4.7 k Ω ) r105 7030005590 s.Resistor ...

  • Page 22

    S.=surface mount c99 4030014230 s.Ceramic ecue1e681kbq c100 4030013970 s.Ceramic c1005 jb 0j 104k-t-n c101 4030014120 s.Ceramic ecue1h100ccq c102 4030013850 s.Ceramic ecue1e102kbq c103 4030009820 s.Ceramic c1005 jb 1c 103k-t-a c104 4030006900 s.Ceramic c1608 jb 1e 103k-t-a c105 4550003220 s.Tantalum...

  • Page 23

    S.=surface mount c665 4030014200 s.Ceramic ecue1h101jcq c666 4030014470 s.Ceramic ecue1e391kbq c667 4030009820 s.Ceramic c1005 jb 1c 103k-t-a j1 6510020550 s.Connector axk6s40445p ep1 0910050763 pcb b 5163c 6 - 6 ref order description no. No. [rf unit].

  • Page 24: Section 7

    Section 7 mechanical parts and disassembly 7 - 1 screw abbreviations a, b0, bt: self-tapping ph: pan head fh: flat head bih: bind head ni: nickel sus: stainless zk: black ref. No. Oder no. Description qty. J1 6510020950 connector sma-r226 1 sp1 2510000960 speaker k036na500-26a27 1 mp1 8210015690 199...

  • Page 25

    7 - 2 unit abbreviation (c): chassis parts, (r): rf unit, (l): logic unit sp1 (c) mp4 (c) mp27 (c) mp26 (c) mp7 (c) mp11 (c) mp1 (c) mp14 (c) mp10 (c) mp6 (c) mp13 (c) mp23 (c) mp15 (c) mp2 (c) mp3 (c) mp5 (c) mp22 (c) mp5 (l) mp22 (c) mp4 (l) rf unit logic unit mp1 (l) ds8 (l) mp2 (l) mp3 (l) ep2 (...

  • Page 26

    Section 8 semi-conductor information 8 - 1 2sa1588 gr (symbol: a6) 2sc5006 (symbol: 24) dta144ee (symbol: 16) xp1113 (symbol: 7l) xp4312 (symbol: 7t) dtc144ee (symbol: 26) fh102 (symbol: 102) µ pa805t (symbol: t82) 2sc5231 c8 (symbol: c8) 2sc5277 d2 (symbol: d2) 2sj144 y (symbol: vx) 2sk880 y (symbo...

  • Page 27

    Section 9 board layouts 9 - 1 logic unit • top view r185 r26 ic2 r77 c42 r51 r50 r49 d1 r86 q18 r35 r34 r33 r32 c51 c106 q40 w2 ic1 1 r5 ds2 r100 r87 q13 c39 r24 r89 r88 c40 ic5 d9 d8 d7 d6 d10 d14 c121 c24 ic3 c5 c35 + + ++ c15 9 - 1.

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    • bottom view q1 1 r37 r23 r25 r79 c102 c123 q3 r9 r68 c37 r8 r174 c96 l1 c98 c1 19 r183 c100 c103 r186 r1 14 c107 r52 q38 r78 c41 r22 x1 c8 r173 q39 r175 r182 r179 r67 r3 r1 q6 c4 ic4 q4 q17 d4 ic10 c6 c120 r180 c9 r172 r94 c101 r181 r103 c114 r42 c13 r41 r141 r40 r153 c11 c76 d17 w3 c44 c108 r14 r...

  • Page 29

    C543 r236 r234 d69 l11 c47 l13 c50 c5 q26 c51 r110 r19 c45 r99 d13 d3 r233 r237 c546 c540 c19 c20 c218 r239 c23 c22 c21 l2 l5 l4 l39 l83 c517 c519 c518 c516 d63 r222 r225 r226 l86 c526 r223 c528 c171 d52 r128 r224 c199 c44 r106 l41 r108 l10 d31 c42 r98 c665 c141 r6 c43 c46 r18 r112 c414 r105 d34 c13...

  • Page 30

    • bottom view c264 c139 l40 c214 r93 c138 c39 l1 d2 c234 c103 c659 c259 r50 c424 r121 c656 c81 c154 c80 r1 d17 c78 c79 c162 c211 r123 r188 d46 c182 c166 c158 c183 q30 d54 l63 r125 c178 c164 r67 c241 c434 l77 fi1 c505 c233 c119 d25 d72 ic1 d1 l28 r79 r9 c13 c12 r8 c416 c10 l59 c512 c8 l82 c514 c11 l5...

  • Page 31

    Section 10 block diagram 10 - 1 common q509: dta144ee rf unit 0.495-1.8995mhz d68: 1sv172 lim lpf 0.495-29.995mhz d69: ma2s077 d13: 1sv308 d73: 1sv308 d75: 1sv308 bandsw 15-29.995mhz 1.9-14.995mhz d64: ma2s077 d67: ma2s077 d70: ma2s077 d63: ma2s077 d65: ma2s077 d66: ma2s077 b1_3v b2_3v b3_3v rxband ...

  • Page 32

    Section 11 voltage diagram 11 - 1 • logic unit 1 com0 com1 com2 com3 seg3 seg31 seg30 seg29 seg28 seg27 seg26 seg25 seg24 seg23 seg22 seg21 seg20 seg19 seg18 seg17 seg16 seg15 seg14 seg13 seg12 seg11 seg10 seg9 seg8 seg2 seg7 seg6 seg5 seg4 seg1 seg0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ...

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    • rf unit 11 - 2 r169 470 shift off 267.2-380.0mhz shift on 380.0-550.0mhz 1stvco att chassis unit c541 0.1 c542 0.1 d69 ma2s077 r232 330 r233 82 r234 82 d68 1sv172 r235 1.5 k d65 ma2s077 r225 2.2 k c525 0.01 d66 ma2s077 6 5 4 3 2 1 q508 xp4312 c545 0.01 l91 3.9 µ h r238 100 k c522 0.01 c563 0.001 c...

  • Page 34

    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 : 01227 741741 fax : 01227 741742 url : http://www.Icomuk.Co.Uk zac de la plaine, rue brindejonc des...

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    1-1-32, kamiminami, hirano-ku osaka 547-0003, japan a-5520iz-s - w © 1998 icom inc..