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Icom IC-F2710 Service Manual

Other manuals for IC-F2710: Instruction Manual, Instruction Manual
Manual is about: UHF MOBLE TRANSCEIVERS

Summary of IC-F2710

  • Page 1

    Service manual uhf moble transceivers.

  • Page 2

    Introduction danger this service manual describes the latest service information for the ic-f2721/d/f2710/f2821/d/f2810 uhf mobile transceiver at the time of publication. 6 versions of the ic-f2721 have been designed. This service manual covers each version. Ic-f2700 series ic-f2800 series ordering ...

  • 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 transmitter circuits . . . . . . . . . . . . . . . . . . . . ...

  • Page 4: Section 1

    S section 1 specifications 1 - 1 ic-f2721/d, ic-f2821/d ic-f2710, ic-f2810 usa gen eur general measurement method eia-152-c/204d or tia-603 en 300 086 frequency coverage [l] : 400.000–470.000 mhz [h] : 450.000–512.000 mhz [l] : 400.000–470.000 mhz [h] : 480.000–520.000 mhz type of emission 8k10f1e/8...

  • Page 5: Section

    2 - 1 section 2 inside views • bottom view • main unit top view digital cpu (ic20: hd64f2239te16 for ic-f2721d/ f2821d only) apc amplifier (ic37: ta75s01f) mixer circuit (d16: hsb88wstr, l22, l23) base band ic (ic2: ak2346) +5v regulator (q31: 2sb1132, q32: xp6501) af amplifier (ic38: la4425a) rx vc...

  • Page 6: •

    2 - 2 • front-b unit (ic-f2800 series) • front-a unit (ic-f2700 series) backlight dimmer control alc amplifier (ic9: an6123ms) mic amplifier (ic5: tc75s51f) lcd driver (ic7: sed1526f0a) reset ic (ic2: s-80942cnmc) mic switch (ic8: tc4w53f) q3: 2sc4116 q4: dtc114tu q5: dtc114tu front cpu (ic3: hd64f3...

  • Page 7: Section 3

    3 - 1 section 3 disassembly instructions • removing the front unit 1 unscrew 4 screws, a , then remove the bottom cover. W unplug j1( b ) and j6 ( c ). 3 unscrew 2 screws, d . 4 remove the front unit in the direction of the arrow. • removing the main unit 1 remove the bushing, l . W remove the main ...

  • Page 8: Section 4

    4 - 1 • 2nd if demodulator circuit section 4 circuit description fi1 2nd if filter 450 khz noise detector q1 limiter amp. Quadrature detector active filter af signals 5v q3 if amp x4 discriminator ic8 mixer x2 15.3 mhz 45.9 mhz 1st if from the if amplifier (q6) “nois” signal to the cpu (ic23) “dfil”...

  • Page 9

    4 - 2 base band ic (ic2) base band ic (ic2) af signal from fm if ic (ic12, pin 9) 23 20 af amp ic38 speaker ic5 ic43 ic42 ic1 ic8 d12 microphone amp mic alc 3 7 4 fm/pm switch d/a converter fm mod. Lpf "ctcss/dtcs" signal from d/a conveter (ic8, pin 10) "tone" signal from d/a converter (ic8, pin 22)...

  • Page 10

    4 - 3 power amp. Apc amp. Drive amp. + 1 3 4 – hv to antenna connector t2 tmut rf signal from pll circuit t8v apc control circuit for rev q48 q23 ic37 ic29 d40 d38 ygr amp. • apc circuit 4-2 transmitter circuits 4-2-1 microphone amplifier circuit (main unit) the microphone amplifier circuit amplifie...

  • Page 11

    • pll circuit 4 - 4 4-3 pll circuits 4-3-1 pll circuit (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...

  • Page 12

    4 - 5 scrambler/ de-scrambler tx/rx hpf pre- emphasis limiter splatter vr2 expander vr4 rxa2 smf de- emphasis com- pressor vr1 (hpf) rx lpf vr3 (hpf) 7 mod 18 19 20 signal 3 txin 23 rxin 21 sdec 10 14 mdir 9 mtdt mtck 13 msck 11 mdio 12 mrdf msk modulator msk demodulator msk bpf control register txa...

  • Page 13

    4 - 6 4-6 port allocations 4-6-1 main cpu (main unit; ic23) pin number port name description 1 dsda i/o port for data signal to the d/a con- verter (ic30 pin 6). 2 dast outputs strobe signals to the d/a con- verter (ic8, pin 6). 10 sso outputs serial data to the pll ic (ic4, pin 15) and d/a converte...

  • Page 14

    4 - 7 4-6-2 front cpu (front unit; ic3) pin number port name description 7 res input port for rest signal. 19–22 kr0– kr3 i n p u t p o r t s fo r t h e 1 0 - k e y p a d . (ic-f2800 series only) 28, 29 ligt1, ligt2 output control signals for lcd back- light. 47 ledt outputs control signal for the t...

  • Page 15: Section 5

    Section 5 adjustment procedures 5 - 1 ▄ required test equipment equipment grade and range equipment grade and range dc power supply output voltage current capacity : 13.6 (13.2) v dc : 20 a or more audio generator frequency range measuring range : 300–3000 hz : 1–500 mv modulation analyzer frequency...

  • Page 16

    5 - 2 r t y e u q w i !0 !2 !5 !6 !7 o !8 !9 @1 @0 @2 @3 !1 !3 !4 q : reloads adjustment data w : transceiver's connection state e : connected dc voltage measurement r : pll lock voltage measurement t : rf output power y : fm modulation balance u : fm modulation preset i : ctcss/dtcs deviation o : s...

  • Page 17

    5 - 3 modulation analyzer (dc measurable) attenuator 50 db or 60 db to the antenna connector to dc cable standard signal generator –127 to –17 dbm (0.1 v to 32 mv) caution: do not transmit while ssg is connected to the antenna connector. Rf power meter 50 Ω / 1–75 w dc power supply 13.6 (13.2) v / 2...

  • Page 18

    5 - 4 5-2 lcd contrast adjustment adjustment adjustment condition measurement value adjustment unit location unit adjust lcd contrast 1 • operating ch. : ch 1 front a/b c o n n e c t a d i g i t a l multimeter or an oscillo- scope to the check point "contrast". –2.0 v front a/b r59 • preset lcd cont...

  • Page 19

    5 - 5 5-3 soft ware adjustment select an operation using [ ↑ ] / [ ↓ ] keys, then set specifi ed value using [ ← ] / [ → ] keys on the connected computer keyboard. Adjustment adjustment condition measurement value unit location pll lock voltage [lv (rx lva1)] [lv (rx lva2)] [lv (tx lva)] 1 • operati...

  • Page 20

    5 - 6 software adjustment (continued) select an operation using [ ↑ ] / [ ↓ ] keys, then set specifi ed value using [ ← ] / [ → ] keys on the connected computer keyboard. Adjustment adjustment condition measurement value unit location output power [power (hi)] 1 • operating ch. : ch 10 • transmittin...

  • Page 21

    Software adjustment (continued) select an operation using [ ↑ ] / [ ↓ ] keys, then set specifi ed value using [ ← ] / [ → ] keys on the connected computer keyboard. Adjustment adjustment condition measurement value unit location digital deviation [mod dig c] (ic-f2721d/ f2821d only) 1 • operating ch...

  • Page 22

    Software adjustment (continued) • select an operation using [ ↑ ] / [ ↓ ] keys, then set specifi ed value using [ ← ] / [ → ] keys on the connected computer keyboard. Adjustment adjustment condition measurement value unit location note: adjust all the adjustment items as follows throughly in sequenc...

  • Page 23: Section 6

    Section 6 parts list m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [front-a unit] (for ic-f2700 series) [front-a unit] (for ic-f2700 series) ref order description m. H/v no. No. Location r48 7030005090 s.Res erj2gej 104 x (100 k Ω ) b 74.9/29.4 r49 7030005090 s.Res erj2...

  • Page 24

    [front-a unit] (for ic-f2700 series) ref order description m. H/v no. No. Location c76 4030018860 s.Cer ecj0eb0j105k b 24.7/11.1 c77 4030017420 s.Cer ecj0ec1h470j b 82.2/35.1 c78 4030017420 s.Cer ecj0ec1h470j b 81/32.4 c79 4030016930 s.Cer ecj0eb1a104k b 28.2/11.1 j1 6510024520 s.Cnr 12flt-sm1-tb b ...

  • Page 25

    [front-b unit] (for ic-f2800 series) ref order description m. H/v no. No. Location c47 4030017420 s.Cer ecj0ec1h470j b 18.5/15.8 c48 4030017460 s.Cer ecj0eb1e102k b 31.8/15.3 c49 4030016790 s.Cer ecj0eb1c103k b 27.8/17.7 c50 4550006540 s.Tan ecst1cy475r b 27.5/20.8 c51 4030017460 s.Cer ecj0eb1e102k ...

  • Page 26

    [main unit] ref order description m. H/v no. No. Location q32 1590001190 s.Tr xp6501-(tx) .Ab t 104.4/72.6 q33 1590001450 s.Fet 2sj144-gr (te85r) b 148.5/21.6 q34 1540000550 s.Tr 2sd1664 t100q b 101.2/81.2 q35 1590001050 s.Tr dtc114tua t106 t 104.4/76.2 q36 1530002850 s.Tr 2sc4116-bl (te85r) [f2721/...

  • Page 27

    [main unit] ref order description m. H/v no. No. Location r10 7030005210 s.Res erj2gej 822 x (8.2 k Ω ) t 49.2/32.9 r11 7030005120 s.Res erj2gej 102 x (1 k Ω ) t 54.4/26.9 r12 7030007300 s.Res erj2gej 332 x (3.3 k Ω ) t 54.1/16.2 r13 7030005090 s.Res erj2gej 104 x (100 k Ω ) b 136.7/15.9 r14 7030005...

  • Page 28

    [main unit] ref order description m. H/v no. No. Location [f2721d], [f2821d] only b 97.8/25.9 r172 7030005240 s.Res erj2gej 473 x (47 k Ω ) [f2721d], [f2821d] only b 116.5/17.7 r173 7030010040 s.Res erj2ge-jpw t 48/52.4 r174 7030006020 s.Res rr0510p-682-d (6.8 k Ω ) t 50.5/53.4 r175 7030006020 s.Res...

  • Page 29

    [main unit] ref order description m. H/v no. No. Location r321 7030010040 s.Res erj2ge-jpw t 139.3/79.3 r322 7030005050 s.Res erj2gej 103 x (10 k Ω ) b 148/81.2 r323 7030008410 s.Res erj2gej 392 x (3.9 k Ω ) b 148/79.2 r324 7030007290 s.Res erj2gej 222 x (2.2 k Ω ) b 150.5/81.2 r325 7030007290 s.Res...

  • Page 30

    [main unit] ref order description m. H/v no. No. Location c26 4030017420 s.Cer ecj0ec1h470j t 73.4/8.7 c27 4030017420 s.Cer ecj0ec1h470j t 68.5/14.9 c28 4030017420 s.Cer ecj0ec1h470j t 70.3/14.9 c29 4030017420 s.Cer ecj0ec1h470j b 77.5/32.6 c30 4030017510 s.Cer ecj0ec1h680j b 82.1/36.4 c31 403001733...

  • Page 31

    [main unit] ref order description m. H/v no. No. Location c198 4030016790 s.Cer ecj0eb1c103k b 34.4/32.9 c199 4030017460 s.Cer ecj0eb1e102k b 32.5/37.7 c200 4030016790 s.Cer ecj0eb1c103k b 31.7/50.4 c201 4030017460 s.Cer ecj0eb1e102k b 31.7/51.4 c202 4030017350 s.Cer ecj0ec1h020b b 38/35.7 c203 4030...

  • Page 32

    [main unit] ref order description m. H/v no. No. Location c337 4030016930 s.Cer ecj0eb1a104k [f2721d], [f2821d] only t 96.7/29.2 c338 4030016930 s.Cer ecj0eb1a104k [f2721d], [f2821d] only t 111.7/11 c339 4030016930 s.Cer ecj0eb1a104k [f2721d], [f2821d] only t 107.2/10.7 c340 4550007080 s.Tan teesva ...

  • Page 33

    [main unit] ref order description m. H/v no. No. Location c503 4030017420 s.Cer ecj0ec1h470j t 106.9/106.7 c504 4030017420 s.Cer ecj0ec1h470j t 112.6/106.7 c505 4030017420 s.Cer ecj0ec1h470j t 128.6/106.9 c508 4030017420 s.Cer ecj0ec1h470j b 110.8/106.6 c509 4030017420 s.Cer ecj0ec1h470j t 99.9/87.6...

  • Page 34: Section 7

    7 - 1 +%934)#+%2 -# 7 -0 30 -0 -0 -0 -0 -0 -0 -0 -0 ;&$=;&=only -0 7 -0 section 7 mechanical parts and disassembly screw abbreviations a0, b0, bt: self-tapping ph: pan head ni: nickel sus: stainless ni-zu: nickel-zinc [chassis parts] [accessories] ref. No. Order no. Description qty. W1 8900010990 dc...

  • Page 35

    7 - 2 5nitabbreviations # #(!33)30!243 & &2/.45.)4 - -!).5.)4 &2/.4!5.)4 &2/.4"5.)4 )#&3eries )#&3eries 5nitmminch &2/.4!5.)4 -0& -0& -0& -0# -0# -0& -0& -0& -0& -0& -0& -0& $3& %0& %0& -0& -0& -0& 30& -0& -0& 7& 7& 7& 7& *- *# -0# *- 7& -0# -0# -0- -0# -0# )#- -0# *- *- -0- -0- -0- -0# -0# %0- %0- ...

  • Page 36

    8 - 1 section 8 semi-conductor information • transistor and fet’s • diodes b e c b e c b e c b e c b e c b c e g g d d s s s d g g s d d s g2 g1 b e c b e c e1 b1 b2 c1 c2 e1 e2 b2 c1 b1 c2 2sa1577 t106 q 2sc3356 t1b r25 2sb1132 q 2sc4215 o 2sc4226 t1 r25 2sc5107 o 2sd1664 t100q 2sj144 gr 2sj377 2sk...

  • Page 37

    9 - 1 section 9 board layouts h5 h10 h15 h20 h25 h30 h35 h40 h45 h50 h55 h60 h65 h70 h75 h80 h85 h90 h95 h100 h105 h110 h115 h0 v0 v5 v10 v15 v25 v30 v35 v20 v40 to mic jack clo ptt mic cli 8v afo mice gnd j2 7 8 1 2 1 3 5 7 2 4 6 8 af volume dial 9-1 front-a unit (for ic-f2700 series) • top view th...

  • Page 38

    9 - 2 the combination of this page and the previous page shows the unit layout in the same configuration as the actual p.C. Board. H0 v0 h115 h110 h105 h100 h95 h90 h85 h80 h75 h70 h65 h60 h55 h50 h45 h40 h35 h30 h25 h20 h15 h10 h5 v5 v10 v15 v25 v30 v35 v20 v40 to main unit afo mic posw mfd a gnd s...

  • Page 39

    9 - 3 v5 v10 v15 v0 v25 v30 v35 v20 v40 h5 h10 h15 h20 h25 h30 h35 h40 h45 h50 h55 h60 h65 h70 h75 h80 h85 h90 h95 h100 h105 h110 h115 h120 h125 h130 h135 h140 h145 h150 h155 h160 h165 h0 1 3 5 7 2 4 6 8 to mic jack clo ptt mic cli 8v afo mice gnd j2 7 8 1 2 af volume 9-2 front-b unit (for ic-f2800 ...

  • Page 40

    H165 h160 h155 h150 h145 h140 h135 h130 h125 h120 h115 h110 h105 h100 h95 h90 h85 h80 h75 h70 h65 h60 h55 h50 h45 h40 h35 h30 h25 h20 h15 h10 h5 h0 v5 v10 v15 v0 v25 v30 v35 v20 v40 to main unit afo mic posw mfd a gnd slq gnd mice fmd a 8v gnd vcc j1 12 11 2 1 9 - 4 front-b unit • bottom view (for i...

  • Page 41

    9 - 5 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 h0 h5 h10 h15 h20 h25 h30 h35 h40 h45 h50 h55 h60 h65 h70 h75 h80 h85 h90 h95 h100 h105 h110 h115 h120 h125 h130 h135 h140 h145 h150 h155 h160 to front unit to optional unit ut-109, ut-110, ut-111...

  • Page 42

    9 - 6 h160 h155 h150 h145 h140 h135 h130 h125 h120 h115 h110 h105 h100 h95 h90 h85 h80 h75 h70 h65 h60 h55 h50 h45 h40 h35 h30 h25 h20 h15 h10 h5 h0 v0 v5 v10 v15 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 sp– sp+ ext. Speaker 25pin connector 1 14 2 15 3 16 4...

  • Page 43

    10 - 1 section 10 block diagram ,0& 072 $%4 $$-! 2%& 8 #2 -54%37 $-!3 !.4 37 $8"! ;&$= ;&$=only $;&= ;&=only $5-& 072 !-0 &), 2)00,% 13# &), ,//0 0,, )# )# ,-84-8 8 1 3# 8#$"#+#!9 "0& "0& "0& 2& !-0 13+ !0# !-0 )#4!3& "0& 84!, &)&, )& !-0 13# "0& #%2!-)# &)#&7,"+'&! "5&& 1 3# "5&& 1 3# "5&& 13# "5&&...

  • Page 44

    11 - 1 section 11 voltage diagram # p # p # p # p # p # -&$! -&$! 0/37 -)# !&/ 6## 6 6 6 &-$! 6## 6## 31, to -)#jack &,!3(for &2/.4#05 6 &-$! -)#% * # k 2 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3# 1 2 + 2 $4#45! 1 $4#45! 1 * k 2 - 2 p # 3#.-# )# /54 6$$ 633 ...

  • Page 45

    11 - 2 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 3-,94 $3 2 + 2 * k 2 - 2 p # /54 6$$ 633 .# #$ # # # # 2 #2 -(z 8 p # # p # k 2 k 2 -! $ # k 2 # k 2 -! $ k 2 p # p # # # k 2 -! $ ( , # k 2 k 2 k 2 # # # k 2 p # -! $ p # k 2 -!3 $ # k 2 k 2 k 2 k 2 #42, '.$ ." 6/54 6). ...

  • Page 46

    11 - 3 ic20 hd64f2239te16 [f2721d], [f2821d] only pe5/d5 pe6/d6 pe7/d7 pd0/d8 pd1/d9 pd2/d10 pd3/d11 pd4/d12 pd5/d13 pd6/d14 pd7/d15 cvcc pc0/a0 vss pc1/a1 pc2/a2 pc3/a3 pc4/a4 pc5/a5 pc6/a6 pc7/a7 pb0/a8/tioca3 pb1/a9/tiocb3 pb2/a10/tiocc3 pb3/a11/tiocd3 pb4/a12/tioca4 pb5/a13/tiocb4 pb6/a14/tioca5...

  • Page 47

    Common line ic37 ta75s01f main unit c417 1 hv r332 10k c482 0.001 c474 47p c455 0.001 q39 dtc144eua q38 dtc144eua c453 0.001 c423 0.1 c452 0.001 c424 0.1 r336 10k r337 47 r335 1k r307 1m r334 100k r333 1m d39 ma2s111 q33 2sj144 c395 10 r301 100k r306 220k r302 220k c485 0.001 c477 470 c475 47p c476 ...

  • Page 48

    6f no.68, sec. 1 cheng-teh road, taipei, taiwan, r.O.C. Phone : +886 (02) 2559 1899 fax : +886 (02) 2559 1874 url : http://www.Asia-icom.Com e-mail : sales@asia-icom.Com zac de la plaine, 1, rue brindejonc des moulinais bp 5804, 31505 toulouse cedex, france phone : +33 (5) 61 36 03 03 fax : +33 (5) ...

  • Page 49

    1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14127mz-c1 © 2005 icom inc..