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Icom IC-F51 Service Manual Addendum

Manual is about: VHF TRANSCEIVER

Summary of IC-F51

  • Page 1

    Service manual addendum contents parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 board layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 voltage diagram . . . . . . . . . . . . . . . . . . . . . . . . . 8 feb. 2008.

  • Page 2: Parts

    Feb. 2008 1 parts list 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 ic401 1140010191 s.Ic hd64f2268tf20v t 22.9/28 ic403 1110005340 s.Ic njm12902v-te1 t 19.2/43.2 ic405 1110001811 s.Ic ta7368fg (5,er) t 25.9/53...

  • Page 3

    Feb. 2008 2 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 c483 4030017460 s.Cer ecj0eb1e102k t 38.1/43.4 c484 4030017460 s.Cer ecj0eb1e102k b 14.7/55.2 c485 4030017460 s.Cer ecj0eb1e102k b 7.3/58 c486 4030017460...

  • Page 4

    Feb. 2008 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 l27 6200007170 s.Col mlf1608a 3r3k-t t 41/21.9 l28 6200007170 s.Col mlf1608a 3r3k-t t 40.4/25.1 l31 6200007001 s.Col eljre 82ngfa t 58.8/4.8 l32 620000572...

  • Page 5

    Feb. 2008 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 c29 4030017560 s.Cer ecj0ec1h2r5b t 48.7/6.4 c30 4030016930 s.Cer ecj0eb1a104k t 49.1/10.5 c31 4030016930 s.Cer ecj0eb1a104k b 51/8.2 c32 4030017460 s.Cer...

  • Page 6

    Feb. 2008 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 c273 4030016930 s.Cer ecj0eb1a104k [usa-88], [usa-98] only b 16.2/37.1 c274 4030016930 s.Cer ecj0eb1a104k [scrambler] only b 17.6/26.7 c275 4030017490 s.C...

  • Page 7: • Front Unit

    Feb. 2008 c401 c402 c403 c404 c405 c406 c407 c408 c409 c410 c411 c412 c413 c414 c415 c416 c417 c418 c419 c420 c421 c423 c424 c425 c427 c428 c429 c430 c431 c432 c434 c435 c436 c441 c442 c443 c444 c445 c446 c447 c448 c449 c450 c461 c462 c463 c464 c465 c466 c467 c468 c473 c474 c475 c476 c477 c478 c479 ...

  • Page 8: • Front Unit

    Feb. 2008 c426 c433 c437 c484 c485 c500 ds402 ds403 ds404 ds405 ds406 q403 q404 q405 q406 q413 r434 r442 r443 r444 r445 r446 r457 r458 mp450 h0 h5 h10 h15 h20 h25 h30 h35 h40 h45 v0 v5 v10 v15 v20 v25 v30 v35 v40 v45 v50 v55 v60 v65 v70 c701 c702 c703 c704 d701 d702 d703 d705 ep701 ep702 ep703 ep704...

  • Page 9: Voltage

    Feb. 2008 8 voltage diagram *; refer to “parts list.” 100k r472 0.015 c441 xp4312 q411 1 2 3 4 5 6 r509 100k bu4094bcfv ic410 1 str 2 d 3 clk 4 q1 5 q2 6 q3 7 q4 8 gnd 9 qs 10 q’s 11 q8 12 q7 13 q6 14 q5 15 oe 16 v+ o pc-1210a w401 njm12902v ic403 2 3 1 10k r465 100k r410 1 c474 22k r474 sml-a12m t ...

  • Page 10: Service Manual

    Service manual addendum contents parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 board layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 voltage diagram . . . . . . . . . . . . . . . . . . . . . . . . . 8 aug. 2007.

  • Page 11: Parts

    1 parts list 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 ic401 1140010191 s.Ic hd64f2268tf20v t 22.9/28 ic403 1110005340 s.Ic njm12902v-te1 t 19.2/43.2 ic405 1110001811 s.Ic ta7368fg (5,er) t 25.9/53.3 ic406 1...

  • Page 12

    2 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 c483 4030017460 s.Cer ecj0eb1e102k t 38.1/43.4 c484 4030017460 s.Cer ecj0eb1e102k b 14.7/55.2 c485 4030017460 s.Cer ecj0eb1e102k b 7.3/58 c486 4030017460 s.Cer ecj...

  • Page 13

    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 l27 6200007170 s.Col mlf1608a 3r3k-t t 41/21.9 l28 6200007170 s.Col mlf1608a 3r3k-t t 40.4/25.1 l31 6200007001 s.Col eljre 82ngfa t 58.8/4.8 l32 6200005721 s.Col el...

  • Page 14

    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 c29 4030017560 s.Cer ecj0ec1h2r5b t 48.7/6.4 c30 4030016930 s.Cer ecj0eb1a104k t 49.1/10.5 c31 4030016930 s.Cer ecj0eb1a104k b 51/8.2 c32 4030017460 s.Cer ecj0eb1e1...

  • Page 15

    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 c273 4030016930 s.Cer ecj0eb1a104k [usa-88], [usa-98] only b 16.2/37.1 c274 4030016930 s.Cer ecj0eb1a104k [scrambler] only b 17.6/26.7 c275 4030017490 s.Cer c1608 j...

  • Page 16: • Front Unit

    6 • front unit (top view) • vr unit (top view) • main unit (top view) + – • connect unit (top view) 36 1 1 gnd duse afout afon pw on gnd j402 to the vr unit w601 4 1 4 6 5 36 1 gnd mic gnd tone cdcs signal so sck mdio msck scst plst scat exsm exoe mtot mtck nois sdec cdec kr1 lvin rssi temp unlk mdi...

  • Page 17: • Front Unit

    7 • front unit (bottom view) • vr unit (bottom view) • main unit (bottom view) • connect unit (bottom view) 36 1 duse afout afon pw on w601 to the front unit j402 4 ptt mic clo cli res gnd optv afo vcc p 0 p 1 p 2 p 3 c426 c433 c437 c484 c485 c500 ds402 ds403 ds404 ds405 ds406 mc401 q403 q404 q405 q...

  • Page 18: Voltage

    8 voltage diagram *; refer to “parts list.” 100k r472 0.015 c441 xp4312 q411 1 2 3 4 5 6 r509 100k bu4094bcfv ic410 1 str 2 d 3 clk 4 q1 5 q2 6 q3 7 q4 8 gnd 9 qs 10 q’s 11 q8 12 q7 13 q6 14 q5 15 oe 16 v+ o pc-1210a w401 njm12902v ic403 2 3 1 10k r465 100k r410 1 c474 22k r474 sml-a12m t ds405 56k ...

  • Page 19

    9 *; refer to “parts list.” c137 0. 01 0.001 c301 xp6501 q24 1 2 3 4 5 6 evqp7m01k s1 68k r148 c152 47p r17 47 l4 5.8n 0. 1 c213 0.001 c306 l35 0.22u l8 68n 0.1 c257 r13 100k l2 24n 0. 1 c180 q2 3sk293 r14 10k m62363f p ic6 1 vin1 2 vout1 3 vout2 4 vin2 5 vdd 6 ld 7 clk 8 di 9 vin3 10 vout3 11 vout4...

  • Page 20

    S-1407iz-c1- e dec. 2006 vhf transcever.

  • Page 21

    Repair notes danger never connect the transceiver to an ac outlet or to a dc power supply that uses more than 8 v. Such a connection could cause a fire or electric hazard. Do not reverse the polarities of the power supply when connecting the transceiver. Do not apply an rf signal of more than 20 dbm...

  • Page 22

    Table of contents section 1 specifications section 2 inside views section 3 disassembly instructions section 4 circuit descripiton 4-1 receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 transmiter circuits . . . . ....

  • Page 23

    Section 1 specifications 1 - 1 general • frequency coverage : 136.000–174.000 mhz • type of emission : version wide middle narrow [usa], [gen] 16k0f3e (25.0 khz) 11k0f3e (12.5 khz) [eur] 14k0f3e (20.0 khz) 8k50f3e (12.5 khz) • number of conventional channels : 128 ch (divided into 8 banks) • antenna...

  • Page 24: •

    Section 2 inside views • main unit 2 - 1 • front unit apc amplifier (ic2: ta75s01f) +5 regurator (ic9: njm2870) if amplifier (q4: 2sc4215) fm if ic (ic1: ta31136fn) antenna switches (d2,d5: 1sv307) analog switch (ic13: bu4066bcfv) baseband ic (ic10: ak2346) expander ic (ic12: bu4094bcfv) d/a convert...

  • Page 25: •

    Section 3 disassembly instructions 3 - 1 chassis unit b c d f g e h a e f i i shield cover j j k l l k main unit chassis unit n n front unit j402 m o • removing the chassis unit 1 unscrew 1 nut a , and remove 1 knob b . 2 remove 1 washer c , and unscrew 1 screw d . 3 unscrew 2 screws e , and remove ...

  • Page 26

    4 - 1 section 4 circuit description 4-1 receiver circuits 4-1-1 antenna switching circuit (main unit) the antenna switching circuit functions as a low-pass filter while receiving and a resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits. ...

  • Page 27

    4 - 2 4-1-5 af amplifier circuit (main and front units) the af amplifier circuit amplifies the demodulated af signals to drive a speaker. This transceiver employs the base band ic which is composed of pre-amplifier, expander, scrambler, msk de-modulator, etc. At the af amplifier section. The af sign...

  • Page 28

    4 - 3 4-2-2 modulation circuit (main unit) the modulation circuit modulates the vco oscillating signal (rf signal) using the microphone audio signals. The af signals from the d/a converter (ic6, pin 3) change the reactance of varactor diode (d18) to modulate the oscillated signal at the tx vco circu...

  • Page 29

    4-3-2 vco circuit (main unit) the vco circuit contains a separate rx vco (q14, d19, d20) and tx vco (q13, d16, d17). The oscillated signal is amplified at the buffer amplifiers (q10, q12) and is then applied to the t/r switch (d14, d15). Then the receive 1st lo (rx) signal is applied to the 1st mixe...

  • Page 30

    4 - 5 4-5 other circuits 4-5-1 compounder circuit (main unit) ic-f50/f51 have compounder circuit which can improve s/n ratio and become wide dynamic range to suppress the transmitting signal and to extend receiving signal. The circuit is composed of the base band ic (main unit; ic10). (1) in case of...

  • Page 31

    4-6-2 main cpu (front unit; ic401) input port for the ptt switch detection signal. Low: while the ptt switch is pushed. Input ports for the key return a/d signals. Input port for the detect signal for connecting battery pack’s voltage. Input port for the pll lock voltage. Input port for the s-meter ...

  • Page 32

    4 - 7 4 5 6 7 11 12 13 14 ledr ledt ligt afon duse mcon csft spon outputs rx led control signal. Low: lights on. Outputs tx led control signal. Low: lights on. Outputs back light led control signal. Low: back light is on. Outputs audio control signal. Low: outputs audio signals from speaker. • outpu...

  • Page 33

    5 - 1 section 5 adjustment procedures 5-1 preparation when adjusting ic-f50/f51, the optional cs-f50 adj adjustment software (rev. 1.0 or later), *opc-966 jig cable (modified opc-966 cloning cable ) are required. Required test equipment system requirements • microsoft ® windows ® 95/98/me • rs-232c ...

  • Page 34

    5 - 2 cs-f50 adj rev.1.0 file com 1: open option connect reload (f5) disp para [a / d] vin : 203 : cbh : 7.96 v temps : 190 : beh : 32.23 'c lvin : 110 : 6eh : 2.16 v sd : 31 : 1fh : 0.61 v s mtr : power (hi) : 155 [ # # # # # # # # # # # # ] power (l2) : 82 [ # # # # # # ] power (l1) : 51 [ # # # #...

  • Page 35

    5 - 3 + add a jumper wire here electrolytic capacitor 47 µf opc-966 (cloning cable) audio generator 300 hz to 3 khz ac millivoltmeter ptt ptte mic mice sp– sp+ + – fm deviation meter sinad meter speaker (8 Ω ) audio generator *opc-966 (jig cable) rs-232c cable (straight) ic-f50/f51 db9 female plug (...

  • Page 36

    5-2 software adjustments (transmitting) select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. 5 - 4 adjustment adjustment condition measurement value unit location pll lock voltage [lv (rx lva)] [lv (tx lva)] 1 • operating...

  • Page 37

    5 - 5 software adjustments (receiving) • select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. • need to adjust “s-meter adjustment” after “rx sensitivity adjustment” is adjusted. Otherwise, “s-meter adjustment” will not b...

  • Page 38: 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] ref order description m. H/v no. No. Location ic1 1110003200 s.Ic ta31136fn (el) b 13.6/9.1 ic2 1110002750 s.Ic ta75s01f (te85r...

  • Page 39

    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 r57 7030005590 s.Res erj2gej 680 x (68 Ω ) t 56.5/28.5 r58 7030005060 s.Res erj2gej 3...

  • Page 40

    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 c69 4030017430 s.Cer ecj0ec1h101j b 11.6/12.9 c70 4030017430 s.Cer ecj0ec1h101j b 10....

  • Page 41

    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 c287 4030016930 s.Cer ecj0eb1a104k b 24.7/30.8 c288 4030016930 s.Cer ecj0eb1a104k except [usa-02], [eur-02], [gen-02] b 20.3/31.3 c289 40300169...

  • Page 42

    [connector unit] ref order description m. H/v no. No. Location d701 1790001810 s.Vsr avr-m1005c080mtabb b 8/2.4 d702 1790001810 s.Vsr avr-m1005c080mtabb b 8/3.4 d703 1790001810 s.Vsr avr-m1005c080mtabb b 8/4.4 d704 1790001810 s.Vsr avr-m1005c080mtabb t 9.6/6.1 d705 1790001810 s.Vsr avr-m1005c080mtab...

  • Page 43: Section 7

    Section 7 mechanical parts and disassembly 7 - 1 ref. No. Order no. Description qty. Ds401 5030002630 l3-0048tay-2 1 ep402 8930061530 srcn-2681-sp-n-w 2 sp401 2510001092 036d0801b 1 w401 8900011880 opc-1210 1 mp401 8210019860 2681 front panel 1 mp404 8930060540 2681 4-2 key board 1 mp405 8210019880 ...

  • Page 44

    7 - 2 mp15 (c) mp11 (c) mp415 (f) mp414 (f) mp413 (f) mp3 (a) mp2 (a) mp15 (c) mp404 (f) mp11 (c) mp411 (f) mp412 (f) mp701 (co) mp418 (f) mp417 (f) mp423 (f) mp426 (f) w401 (f) mp12 (c) mp12 (c) mp12 (c) mp12 (c) mp12 (c) mp4 (m) mp408 (f) sp401 (f) ds401 (f) mp410 (f) r601 (v) mp424 (f) front unit...

  • Page 45

    Section 8 semiconductor information 8 - 1 • transistor and fet’s 2sa1577 q (symbol: hp) 2sc5107 o (symbol: mfo) dta144 eu (symbol: 16) xp1214 (symbol: 9h) rd01mus1 (symbol: k2) rd07mvs1 (symbol: rd07mvs1) xp4111 (symbol: 9u) xp4312 (symbol: 7t) rsr025n03 (symbol: qy) xp6501 ab (symbol: 5n) 3sk299 (s...

  • Page 46: •

    Section 9 board layouts 9-1 main unit • top view j1 (chassis unit) 36 1 gnd vcc vcc nc +5v s5v gnd gnd pwon csft dast mrof mdia unlk temp rssi lvin kr1 cdec sdec nois mtck mtot exoe exsm scat plst scst msck mdio sck so signal cdcs tone gnd mic gnd j1 to the front unit j401 ic12 x1 c218 ic13 l32 q16 ...

  • Page 47: •

    • bottom view c238 q29 ic7 c148 q22 q17 d12 q21 q25 c233 mp1 l19 d15 q9 d14 l22 q13 l37 d20 d19 d21 d16 q1 0 q14 d22 l39 l38 l25 d17 l24 q12 l26 d24 x2 c149 q24 q23 l16 c302 c1 3 c4 l2 l5 l15 c9 r1 l6 d5 l4 c3 c11 l3 d1 l9 mp 5 mp 2 l7 l8 l12 l11 l13 q1 9 ic4 ic15 x4 c264 c75 ic1 x3 c276 ic14 c275 c...

  • Page 48: •

    9-2 front unit • top view c424 c49 4 c428 c48 3 c43 2 c491 c410 c408 r46 6 c44 2 r46 8 r46 7 r47 6 c47 7 c44 6 r420 r441 c445 r464 r465 r46 1 r462 r463 r475 r471 c46 1 r41 5 r472 r473 r474 r503 c473 r502 c468 c466 r414 c417 c495 c412 c493 c416 c413 r494 c418 r501 r412 c465 r413 r404 c403 r50 6 r51 2...

  • Page 49: •

    • bottom view r44 6 r458 r44 4 r44 2 c485 c50 0 r43 4 r445 c433 c484 r443 c426 r457 q413 q406 q403 ds404 q404 mc401 ds402 ds403 q405 c437 ds406 ds405 h45 h35 h50 h40 h30 h25 h15 h5 h20 h10 0 v75 v65 v55 v45 v35 v25 v70 v60 v50 v40 v30 v20 v15 v5 v10 0 9 - 4.

  • Page 50: •

    R601 v35 v25 v40 v30 v20 v15 v5 v10 0 h30 h25 h15 h5 h20 h10 0 b6034b h30 h25 h15 h5 h20 h10 0 v35 v25 v40 v30 v20 v15 v5 v10 0 1 e s u d t u o f a n o f a w p n o w601 to the front unit j402 4 9-3 vr unit • top view • bottom view 9 - 5.

  • Page 51: •

    40 7d 1 0 7 r mp701 v55 v45 v35 v25 v50 v40 v30 v20 v15 v5 v10 0 h15 h5 h10 0 1 9 o f a c c v v t p o e ci m t e s e r d x r d x t ci m t t p 9-4 connector unit • top view • bottom view 407 c 507 d 307 c 207 c 107 c 307 d 207 d 107 d ep704 b6035c ep703 ep702 ep701 ep705 h15 h5 h10 0 v55 v45 v35 v25 ...

  • Page 52

    Section 10 block diagram 10 - 1 136–174mhz lpf tmut battery_1 bt1 1 f1 vcc 2 q26: tcp6103 q403: 2sc4116 q404: rsr025n03 q405: rsr025n03 w406: dtc144eu q401: 2sb1132 q402: xp6501 ic406: tc7w66fk d401: ma2s111 d402: ma2s111 q407: dta144eu q409: xp4111 ds402_403 sml–310mt amp ic407: njm12904 lpf ic403:...

  • Page 53

    Section 11 voltage diagram 11 - 1 11-1 main unit c211 4.7 r104 220 k r105 330 k r94 150 k c151 0.1 c200 47 p c199 0.001 c201 1 c202 0.1 r116 680 k r115 1.2 k l35 0.22 h c185 0.1 c167 0.1 r40 1.5 k c67 0.001 c75 10 r38 100 k r36 1.5 k r48 680 r34 100 k c60 0.01 r35 100 c59 0.001 c57 0.001 c52 12 p c5...

  • Page 54

    11-2 front unit 11 - 2 com2 com1 seg32 seg31 seg30 seg29 seg28 seg27 seg26 seg25 seg24 seg23 seg22 seg21 seg20 seg19 seg18 seg17 pm7/seg32 pn0/seg33 pn1/seg34 pn2/seg35 pn3/seg36 pn4/seg37 pn5/seg38 pn6/seg39 pn7/seg40 ph0/com1 ph1/com2 ph2/com3 ph3/com4 v1 v2 v3 c1 c2 pf3/adtrg/irq3 p35/sck1/scl0/i...

  • Page 55

    11-3 vr unit / connector units vr unit r601 tp76n97n-13f-10ka-2497 w601 duse 4 3 2 1 afout signal pwon from / to the j402 on the front unit connector unit vcc vcc mice r701 1 k 10 7 c 10 0. 0 10 7 d 50 01 m- r v a b b a t m0 80 c 20 7 d 50 01 m- r v a b b a t m0 80 c 40 7 c 10 0. 0 50 7 d 50 01 m- r...

  • Page 56

    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) 61 ...

  • Page 57

    1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14007iz-c1- e © 2003–2006 icom inc..