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Icom IC-F70DS Service Manual

Other manuals for IC-F70DS: Instruction Manual, Instruction Manual

Summary of IC-F70DS

  • Page 1

    Service manual vhf transceiver.

  • Page 2

    Introduction this service manual describes the latest service information for the ic-f70dt/ds and ic-f70t/s vhf transceiver at the time of publication. Danger never connect the transceiver to an ac outlet or to a dc power supply that uses more than 7.2 v. This will ruin the transceiver. Do not rever...

  • Page 3

    Table of contents section 1 specifications section 2 inside views section 3 disassembly instructions section 4 circuit description 4 - 1 receive circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1 4 - 2 trans...

  • Page 4: Section 1

    1 - 1 section 1 specifications m general • frequency coverage : 136–174 mhz • type of emission : 11k0f3e (narrow) 16k0f3e (wide) • number of conventional channels : 256 channels (max.) • antenna impedance : 50 Ω (nominal) • operating temperature range : −22°f to 140°f • power supply requirement : sp...

  • Page 5: Section 2

    Section 2 inside views • front unit speaker control q207: dtc144eu q208: 2sc4116 q209: rsr025n03 q210: rsr025n03 af muting (ic205: tc4s66f) af amplifier (ic201: ta7368f) expander (ic1, ic2: m62320fp) 3.0v regulator (ic101: s-812c30amc-c2k) mic switch (ic204: tc4s66f) mic amplifier (ic203: njm12902v)...

  • Page 6: Section 3

    Section 3 disassembly instructions • removing the chassis unit 1 unscrew the ant nut a and remove the ant washer b. 2 unscrew the screw c, and remove the rear panel d in the direction of the arrow. 3 unscrew 4 screws e and 2 screws f. • removing the main unit 1 disconnect the cable h from j3. 2 remo...

  • Page 7

    4 - 1 section 4 circuit description 4-1 receiver circuits 4-1-1 antenna switching circuit the antenna switching circuit toggles the receive line and the transmit line. This circuit does not allow transmit signals to enter the receiver circuits. Received signals from the antenna connector (chassis un...

  • Page 8

    4 - 2 the quadrature detector is a detection method which uses a ceramic discriminator (x2). The demodulated af signals are output from pin 9, and applied to the af cricuits. 4-1-5 af circuits the demodulated af signals from the fm if ic are ampli- fied and filtered at af circuit. This transceiver e...

  • Page 9

    4 - 3 4-2 transmitter circuits 4-2-1 microphone amplifier circuit the microphone amplifier circuit amplifies the audio signals from microphone within +6 db/oct pre-emphasis characteris- tic. The microphone signals are processed in the base band ic which contains microphone amplifier, compressor, scr...

  • Page 10

    4-3 pll circuits 4-3-1 pll circuit (main unit) the pll circuit provides stable oscillation of the transmit frequency and receive 1st lo frequency. The pll circuit compares the phase of the divided vco frequency with the reference frequency. The pll output frequency is controlled by the divided ratio...

  • Page 11

    4 - 5 bpf from fm if ic (ic3, pin 11) to af volume from mic amplifier (ic203; front unit) to fm/pm sw (ic302, pin 5) • digital mode block diagram dsp unit amp amp q303 ic302 received signal fi1 ic5 ic8 ic7 ic9 ic9 ic4 ic302 ic301 a/d liner codec ic liner codec ic base band ic dig/ana sw dsp ic mic s...

  • Page 12

    4 - 6 pin number port name description 37 nois input port for the noise signal from the fm if ic (ic3, pin 13). 38 pwrsw input port for the [vol] control (vr unit; r1). Low: while power is on. 39 ddst input port for the decodeddtmf sig- nals from the dtmf decoder ic (ic300, pin 11). 40 cirq inputs o...

  • Page 13

    ▄ required test equipment equipment grade and range equipment grade and range dc power supply output voltage current capacity : 7.2 v dc : 3 a or more audio generator frequency range measuring range : 300–3000 hz : 1–500 mv fm deviation meter frequency range measuring range : dc–300 mhz : 0 to ±10 k...

  • Page 14

    3).!$ !Udio 3peaker /0# *)' 23 # &- deviation /sciiloscope to !Ttenuator 2& n &requency counter 3tandard n #!54)/. $/ the the # , * * &2/.4 &53% -!). $30 $# 0# 5 - 2 • connection !Dd %lectrolytic /0# #loning !Udio !# millivoltmeter 044 044% -)# -)#% 30n 30 n • jig cable.

  • Page 15

    5 - 3 • pc screen example r t y e u q w i !0 !2 @5 @6 @7 @8 @9 !5 !6 !7 o !8 !9 @1 @0 @2 @3 @4 !1 !3 !4 q: reload 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 ...

  • Page 16

    5 - 4 5-2 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 operation pll lock voltage [rx lva1] 1 • operating ch. • preset [lv (rx1)] • receiving : ...

  • Page 17

    5 - 5 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 operation output power [power (hi)] 1 • operating ch. • transmitting : ch 3 top pa...

  • Page 18

    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 operation digital deviation* [mod dig c] 1 • preset [dig mode] : 7 top panel conne...

  • Page 19

    5 - 7 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 rx sensitivity [bpf c] note: need to adjust "s-meter adjustment" after "...

  • Page 20: Section 6

    6 - 1 section 6 parts list m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location [main unit] ic1 1130010100 s.Ic lmx2352tmx b 8.3/75.8 ic2 1110005340 s.Ic njm12902v-te1 t 8/75.7 ic3 1110003490 s.Ic ta31136fn b 14.6/57.6 ...

  • Page 21

    S.=surface mount 6 - 2 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location [main unit] ref order description m. H/v no. No. Location l302 6200011250 s.Col llq1608-a18ng b 12.9/92.7 r1 7030005050 s.Res erj2gej 103 x (10...

  • Page 22

    S.=surface mount 6 - 3 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location [main unit] ref order description m. H/v no. No. Location r349 7030005160 s.Res erj2gej 105 x (1 m Ω) t 32.5/15.8 r350 7410001140 s.Ary exb28v1...

  • Page 23

    S.=surface mount 6 - 4 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location [main unit] ref order description m. H/v no. No. Location c79 4030017380 s.Cer ecj0ec1h050b b 23/101.3 c80 4030016790 s.Cer ecj0eb1c103k b 25/1...

  • Page 24

    S.=surface mount 6 - 5 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [main unit] ref order description m. H/v no. No. Location [main unit] ref order description m. H/v no. No. Location c335 4030017720 s.Cer ecj0eb1h331k b 17/32.4 c336 4030016930 s.Cer ecj0eb1a104k t 25....

  • Page 25

    S.=surface mount 6 - 6 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [front unit] ref order description m. H/v no. No. Location [front unit] ref order description m. H/v no. No. Location ic1 1110006440 s.Ic m62320fp df5j b 20.7/73.6 ic2 1110006440 s.Ic m62320fp df5j b 2...

  • Page 26

    S.=surface mount 6 - 7 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [front unit] ref order description m. H/v no. No. Location [dsp unit] (ic-f70dt/ds only) ref order description m. H/v no. No. Location c225 4030016930 s.Cer ecj0eb1a104k b 29.8/40.2 c226 4550006080 s.T...

  • Page 27

    S.=surface mount 6 - 8 m.=mounted side (t: mounted on the top side, b: mounted on the bottom side) [dsp unit] (ic-f70dt/ds only) ref order description m. H/v no. No. Location [dsp unit] (ic-f70dt/ds only) ref order description m. H/v no. No. Location r65 7030004970 s.Res erj2gej 470 x (47 Ω) t 25.7/...

  • Page 28

    Section 7 mechanical parts and disassembly 7 - 1 [front unit] ds2 5030002830 lcd m4-0078tay-2 1 mc201 7700002310 microphone em-140 1 mp1 8210021460 2803 reflector 1 mp2 8930061120 shield sponge (aa) 2 mp3 8930066040 sponge (ik) 1 mp4 8950004430 double coated tape (o) 2 mp5 8930062540 sponge (ho) 2 m...

  • Page 29

    7 - 2 mp1 (c) mp1 (c) mp26 (c) mp43 (c) mp8 (c) mp1 (v) s1 (v) r1 (v) ep1 (v) ds1 (v) j1 (f) mp1 (a) mp1 (m) mp6 (m) mp20 (c) s3 (m) mp2 (m) w2 (c) mp6 (f) mp57 (c) mp57 (c) mp57 (c) mp52 (c) ant board fuse board mp22 (c) mp34 (c) mp35 (c) mp49 (c) mp49 (c) mp47 (c) j1 (c) mp55 (c) mp25 (c) mp29 (c)...

  • Page 30

    Section 8 semiconductor information • transistors and fet's • diodes b e c b c e b e c b e c b e c d s nc g b e c b e c b e c b e c g s d s d g d s g2 g1 b e c b e c g d s s d g g s d g s d s b e c b e c d d g d d s e1 b1 b2 c1 c2 e1 b1 b2 c1 c2 e1 e2 b2 c1 b1 c2 2sa1577 t106 q 2sb1132 t100 q 2sc408...

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    Section 9 board layouts 9 - 1 h5 h10 h15 h20 h25 h30 h35 h40 h45 h0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 v125 v130 v120 7 4 1 p0 p1 p2 p3 0 8 5 2 # 9 6 3 mp6 mp4 mp4 mp1 ds2 mp5 9-1 front unit • top view.

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    H5 h10 h15 h20 h25 h30 h35 h40 h45 h0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 v125 v130 v120 mc1 microphone gnd i_mic emergency speaker (chassis sp1) w2 2 1 vdd1 1 8 to lcd (ds2) j101 vdd2.3 res sda scl vss vss v_lcd tp 1 20 j2 r8 r4 r2 r1 gn...

  • Page 33

    5 8 4 1 h 5 h1 0 h1 5 h2 0 h2 5 h 30 h 35 h4 0 h 0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 v125 v120 12 1 1 7 14 8 13 1 7 14 8 24 1 4 8 5 batt from fuse board j1 gnd gnd to ant board ant gnd monitor ptt down up to dsp unit j1 j2 gnd 5v vcc dm...

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    H5 h10 h15 h20 h25 h30 h35 h40 h0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 v65 v70 v75 v60 v80 v90 v95 v100 v85 v105 v110 v115 v125 v120 3 1 5 6 1 8 16 9 1 8 16 9 1 12 24 13 16 9 1 8 75 51 50 100 1 26 76 25 1 7 14 8 1 4 8 5 1 3 6 4 1 12 24 13 9 - 4 • bottom view (main unit) • bottom view (ant b...

  • Page 35

    9-5 dsp unit (ic-f70dt/ds only) • top view 9-6 vr board • bottom view (dsp unit) h5 h10 h15 h20 h25 h30 h35 h40 h45 h50 h55 h60 h65 h70 h75 h0 v5 v10 v15 v0 v25 v30 v35 v20 v45 v50 v55 v40 test to front unit j2 sw1_b sw2_b sw2_a s1 r1 sw3_a gnd led gnd gnd power _sw 5v afvi xrxd reset mice afo detec...

  • Page 36

    Voltage line explanatory notes tx line rx line common line data line front unit lcd led expander expander ic2 m62320fp ds108-ds113 ic1 m62320fp rx sw q202 2sb1132 ds101,ds102, ds106,ds107 ln1371g ×4 vcc sp1 mc1 ic204 tc4s66f ic203 njm12902v ic203 njm12902v em-140 ptt p1 mic xtxd xrxd reset det vcc s...

  • Page 37

    Section 11 voltage diagrams 11-1 front unit 11 - 1 voltage line explanatory notes tx line rx line +5v +5v vcc +5v afo 0.001 c239 w2 i_mic +a5v +5v 5 4 3 2 1 +5v +a5v e_mic 2.2k r224 +a5v +a5v +5v e_mic +5v vcc +a5v afo vcc +5v 680p c19 vcc +5v mcon +5v +5v vcc +5v +5v vr board 0.01 c2 led led r115 1...

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    Voltage line explanatory notes tx line rx line rssid rem disc2 r302 3.3k c308 0.1 5v 5v s5v 5v 0.001 c140 s5v 5v r5v r5v 0.01 c162 r5v 0.1 c385 r5v 5v 0.1 c214 0.001 c213 3.3 µ l44 220k r130 5v r5v 3.3k r68 2sc4215 q14 r5v 5v 4.7 c362 47k r372 0.001 c379 mica s5v 5v 5v 5v 0.1 c336 s5v 5v 5v 5v s5v 5...

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    Voltage line explanatory notes tx line rx line common line dasw resb temp r5v c402 47p c405 10p c404 10p vcc cpu5 cpu5 5v batt t5v vcc -batt +batt batt j3 drxd dtxd j2 r359 47k r358 47k r357 47k j1 (chassis) unit j1 to front mic sp+ vcc optv afvi voxout pwrsw kr em ptti pttsw spcon afon fsda fscl re...

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    Voltage line explanatory notes tx line rx line 5.0v 5.0v dvdd 3.3v md2 dvdd 3.3v 47k r61 cpu_res temp resetb flash_rxd flash_txd dvdd 3.3v rssi temp resetb temp flash_txd flash_rxd temp flash_txd flash_rxd md2 c91 470p c4 47p 47p c25 0.001 c56 47p c9 resetb temp flash_txd cpu_res flash_rxd md2 r47 1...

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    Asia icom inc. 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...

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