1. DL manuals
  2. Icom
  3. Transceiver
  4. IC-2800H
  5. Service Manual

Icom IC-2800H Service Manual

Other manuals for IC-2800H: Instruction Manual
Manual is about: DUAL BAND FM TRANSCEIVER

Summary of IC-2800H

  • Page 1

    A-5570mi-s © 1999 by icom inc. 6-9-16, kamihigashi, hirano-ku, osaka 547-0002, japan count on us! Dual band fm transceiver ic-2800h ic-2800h.

  • Page 2

    Introduction this service manual describes the latest service information for the ic-2800h fm transceiver at the time of publication. To upgrade quality, all electrical or mechanical parts and inter- nal circuits are subject to change without notice or obligation. Danger never connect the transceive...

  • Page 3

    Table of contents 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

    M general • frequency range : * 1 guaranteed 144.000 – 148.000 mhz only * 2 guaranteed 430.000 – 440.000 mhz only; * 3 guaranteed 440.000 – 450.000 mhz only • mode : fm, am (118.0 – 135.995; rx only) • nomber of memory channel : 232 (incl. 6 pairs of scan edges, 10 log, 10 repeater and 2 call channe...

  • Page 5: Section 2

    2 - 1 section 2 inside views • control unit • main unit * : located underside of this point * : located underside of this point q15 q19 q20 q14 v-vco circuit main cpu (ic19: hd6433876n) eeprom* (ic17: x25320si) pll ic* ic2 m64076agp u-vco circuit uhf fm if ic* (ic8: ta31136fn) mic amplifier* (q88: 2...

  • Page 6: Section 3

    3 - 1 section 3 disassembly instructions • removing the main unit q unscrew 1 screw, a , and remove the cover. W unplug j4 to separate the fan motor from the main unit. E remove 2 main shield, b , and tr-a clip, c in the direc- tion of the arrow. • removing the control unit q unscrew 4 screws, a , a...

  • Page 7

    4 - 1 section 4 circuit description 4-1 receiver circuits 4-1-1 duplexer circuit the transceiver has a duplexer (low-pass and high-pass fil- ters) on the first stage from the antenna connector to sepa- rate the signals into vhf and uhf signals. The low-pass fil- ter (l15, l16, l78, c70–c72) is for v...

  • Page 8

    4 - 2 the 1st if signal from the 2nd if amplifier is applied to the 2nd mixer section of ic28 (pin 16), and is mixed with a 15.2 mhz 2nd lo signal generated by the reference oscillator cir- cuit (x1, ic2) to produce a 450 khz vhf 2nd if signal. The 2nd if signal from the 2nd mixer passes through the...

  • Page 9

    4 - 3 4-1-10 uhf rf circuit the uhf rf signals are passed through part of a duplexer (high-pass filter; l44, l45, l82, c189, c190, c493). The sig- nals are then passed through the low-pass filter (l42, l43, c187, c463), antenna switching circuit (d37, d39, d72), and then amplified at the rf amplifie...

  • Page 10

    4 - 4 4-2-5 vhf apc circuit the apc circuit protects the power amplifier from a mis- matched output load and stabilizes transmit output power. The apc detector circuit (l12, d7, d8) detects forward sig- nals and refrection signals at d7 and d8 respectively. The combined voltage is at a minimum level...

  • Page 11

    4 - 5 4-3-3 uhf loop the generated signal at the u-vco (q20, q21, d20, d21) enters the pll ic (ic2, pin 15) via buffer-amplifiers (q22, q23) and is divided at the programmable divider section and is then applied to the phase detector section. The phase detector compares the input signal with a refer...

  • Page 12

    4-5 port allocations 4-5-1 cpu (main unit; ic19) 4-5-2 sub-cpu (control unit; ic10) outputs reset signal for the lcd con- troller (ic8). Input port for serial signal from the main-cpu (main unit; ic19) output port for serial signal to the main-cpu (main unit; ic19) squelch/volume setting level input...

  • Page 13

    5 - 1 section 5 adjustment procedures 5-1 preparation all adjustments in this section must be performed on wide bandwidth condition unless specified otherwise. (narrow bandwidth is selectable for europe and italy vertions only.) ‘ ‘ required test equipment ‘ ‘ connection equipment dc power supply rf...

  • Page 14

    5 - 2 5-2 pll and transmitter adjustments pll lock voltage pll reference frequency uhf output power vhf output power frequency deviation adjustment adjustment adjustment condition measurement value point unit location unit adjust 1 1 1 2 3 4 1 2 3 4 1 2 3 • vhf displayed freq. : 145.000 mhz • receiv...

  • Page 15

    5 - 3 dc power supply 13.8 v / 20 a r119 uhf output power adjustment cp-lv pll lock voltage check point l2 pll lock voltage adjustment r2 vhf deviation adjustment r119 vhf output power adjustment c84 reference frequency adjustment r78 uhf deviation adjustment controller.

  • Page 16

    *this output level of a standard signal generator (ssg) is indicated as ssg’s open circuit. 5-3 receiver adjustments the receiver adjustments must be performed after pll adjustments. 5 - 4 sensitivity s-meter 1 2 3 1 2 3 4 5 6 7 • turn into sensitivity setting mode. • select an adjustment channel by...

  • Page 17

    5 - 5 dc power supply 13.8 v / 20 a controller r229 uhf squelch adjustment r196 vhf squelch adjustment 2.2 k Ω jig1 jig connector 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 4.7 k Ω jig2 to the microphone connector or (sensitivity) (s-meter) receiver adjustments (continued) squelch (uhf) (vhf) adjustment adjust...

  • Page 18: Section 6 Parts List

    Ic1 1130009250 s.Ic mn83951 ic2 1130008560 s.Ic tc75s51f (te85l) ic3 1180001830 s.Ic m5291fp ic6 1120002580 s.Ic m52338fp ic7 1130007420 s.Ic tc7w14fu (te12l) ic8 1190000950 s.Ic sed1354f0a (qfp15-128pin) ic9 1130009360 s.Ic lh61665as-60a ic10 1140007930 s.Ic hd6433032sk21f ic11 1110004910 s.Ic s-80...

  • Page 19

    R240 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r241 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r242 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r243 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r244 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r245 7030003560 s.Resistor erj3geyj 103 ...

  • Page 20

    Ref order description no. No. C121 4310001070 mylar 100 smc 333k c122 4030014540 s.Ceramic ghm1038 sl 330j 3kv c123 4510006970 s.Electrolytic ecev1ca330wr c124 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c125 4510006230 s.Electrolytic ecev1ea470up c126 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c127 40...

  • Page 21

    Ic1 1150001970 ic m67746-01 ic2 1130009180 s.Ic m64076agp 600c ic3 1110003690 s.Ic m62354gp 75ec ic4 1150001620 ic m57788mr/sc-1318 ic5 1110002750 s.Ic ta75s01f (te85r) ic6 1140003830 s.Ic tc4w66f (te12l) [eur], [ita] only ic7 1140003830 s.Ic tc4w66f (te12l) [eur], [ita] only ic8 1110003490 s.Ic ta3...

  • Page 22

    D26 1790001670 s.Diode rb706f-40t106 d27 1750000510 s.Diode um9401f d28 1750000550 s.Diode 1ss355 te-17 d29 1160000060 s.Diode dan202u t107 d30 1790000860 s.Diode ma133 (tx) d31 1790001670 s.Diode rb706f-40t106 d32 1160000060 s.Diode dan202u t107 d33 1790000620 s.Diode ma77 (tx) d35 1750000550 s.Dio...

  • Page 23

    6 - 6 s.=surface mount l13 6170000230 coil lw-25 l15 6110001610 coil la-244 l16 6110002150 coil la-385 l17 6200002840 s.Coil nl 252018t-r22j l18 6200002850 s.Coil nl 252018t-r82j l19 6200002640 s.Coil nl 252018t-r15j l20 6200007760 s.Coil lqn21a 82nj04 l21 6200007760 s.Coil lqn21a 82nj04 l22 6200008...

  • Page 24

    S.=surface mount r103 7030003370 s.Resistor erj3geyj 271 v (270 Ω ) r104 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r105 7030003680 s.Resistor erj3geyj 104 v (100 k Ω ) r106 7030003420 s.Resistor erj3geyj 681 v (680 Ω ) r107 7030003520 s.Resistor erj3geyj 472 v (4.7 k Ω ) r108 7030003280 s.Resist...

  • Page 25

    6 - 8 s.=surface mount r259 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r260 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) r261 7030003350 s.Resistor erj3geyj 181 v (180 Ω ) r262 7030003360 s.Resistor erj3geyj 221 v (220 Ω ) r263 7030000100 s.Resistor mcr10ezhj 4.7 Ω (4r7) r264 7030000100 s.Resis...

  • Page 26

    S.=surface mount r458 7030003520 s.Resistor erj3geyj 472 v (4.7 k Ω ) r459 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r460 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) r461 7030003680 s.Resistor erj3geyj 104 v (100 k Ω ) r462 7030003680 s.Resistor erj3geyj 104 v (100 k Ω ) r463 7030003680 s.Resi...

  • Page 27

    6 - 10 s.=surface mount c73 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c74 4550000530 s.Tantalum tesva 1v 104m1-8l c76 4550000510 s.Tantalum tesva 1v 473m1-8l c77 4550000550 s.Tantalum tesva 1v 224m1-8l c78 4030011600 s.Ceramic c1608 jb 1c 104kt-n c80 4030006960 s.Ceramic c1608 ch 1h 050c-t-a c81 403...

  • Page 28

    S.=surface mount c246 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c247 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c248 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c249 4030011600 s.Ceramic c1608 jb 1c 104kt-n c250 4510004540 s.Electrolytic ecev0ja470sr c251 4030008880 s.Ceramic c1608 jb 1c 223k-t-a c252 ...

  • Page 29

    6 - 12 s.=surface mount c406 4030006900 s.Ceramic c1608 jb 1e 103k-t-a c407 4030008860 s.Ceramic c1608 jb 1c 153k-t-a c408 4030006860 s.Ceramic c1608 jb 1h 102k-t-a c409 4030008900 s.Ceramic c1608 jb 1c 333k-t-a c410 4030008860 s.Ceramic c1608 jb 1c 153k-t-a c411 4030008770 s.Ceramic c1608 jb 1h 562...

  • Page 30: Section 7

    W 4 8900004880 cable opc-465 1 mp1 8510010880 1642 vco case 2 mp2 8930037120 1647 m-holder 2 mp3 8930045960 2088 spacer 1 mp4 8510012160 2047 rf plate 1 mp5 8510012220 2047 ic plate 1 mp6 8510012280 2047 main-a shield 1 mp7 8510012270 2047 main-b shield 1 f 1 5210000080 fuse fgb 20 a 1 w 1 optional ...

  • Page 31

    7 - 2 mp6 (co) mp1 (co) mp28 (co) mp28 (co) mp27 (co) mp11 (co) mp3 (co) mp2 (co) mp22 (co) mp5 (co) mp6 (co) mp5 (co) note (m) : main unit (co) : control unit (c) : chassis mp12 (co) mp4 (c) mp4 (c) mp3 (c) mp4 (c) mp6 (c) mp4 (c) mp3 (c) mp4 (c) mp3 (c) mp5 (c) mp4 (c) mp13 (co) mp18 (co) ds1 (co)...

  • Page 32

    Section parts list section 8 semi-conductor information 8 - 1 transistors name symbol inside view name symbol inside view 2sb1201-s 2m 2sb934p- b934 b c e b c c e 2sc3324-gr cbg 2sc4081 r br 2sc4116-bl lbl 2sc4213-b ab 2sc4215-o oy 2sc4226 r25 2sc4228 r45 2sc5085-y mcy 2sc5193-t1 t88 b e c 2sa1362-g...

  • Page 33

    9 - 1 9 - 1 control unit • top view mp24 hv tdata rdata gnd sp spe cfl+ nc nc cfl– j3 cfl+ nc nc cfl– j3 from cfl back light ext. Video in uvol usql udial vvol vsql vdial 1 2 3 4 5 6 1 2 3 4 5 6 j2 to main unit j3 j2 1 2 3 4 a b nc com 4 3 2 1 com nc b a the combination of this page and the next pag...

  • Page 34

    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. • bottom view control unit hv tdata rdata gnd sp spe cfl+ nc nc cfl– j3 cfl+ nc nc cfl– j3 from cfl back light (ds2) ext. Video in j4 uvol r145 usql r148 udial s11 vvol ...

  • Page 35

    9 - 3 • top view main unit 4 2 1 3 5 6 j7 data i/o 4 2 1 3 5 6 psql afout dataout datain pttp gnd hv rdata sp tdata gnd spe 6 5 4 3 2 1 j3 to control unit j2 6 7 5 4 3 2 1 8 ext mic input std q4 q3 q2 q1 toe c5v deto gnd opd 1 10 e fv 1 2 j4 mdata e mic mice ptt extmic mu/d m8v m from fan motor mf1 ...

  • Page 36

    9 - 4 4 2 1 3 5 6 j7 data i/o 4 2 1 3 5 6 psql afout dataout datain pttp gnd hv rdata sp tdata gnd spe 6 5 4 3 2 1 from control unit 6 7 5 4 3 2 1 8 ext mic input m8v mu/d extmic ptt mice mic e mdata from ext sp j1 clone i/o j2 main unit • bottom view the combination of this page and the previous pa...

  • Page 37

    2sc4081 ma8075 x4 smd-49 v bias sel q34 umg9n 1/2 q35 dtb123ek initial matrix osc1 osc2 eeprom ic17 x25320si eso power sw ctrl q74 dtc143xu q75 2sb1201 micin cp ic1 hd hd mu/d protecter d61 ma8062 mic mdata mice extmic mic sens. Ctrl ic25 tc7s66fu d66 1ss355 d44 q76 q77 8v reg ic14 ta7808f 2sb1132 u...

  • Page 38

    X4 smd-49 v bias sel q34 umg9n 1/2 q35 dtb123ek initial matrix osc1 osc2 eeprom ic17 x25320si eso power sw ctrl q74 dtc143xu q75 2sb1201 protecter d45 dsa3a1 d46 rd20e uunlk micin vamute uamute cpu ic19 hd6433876nb 10h [usa] hd6433876nb 11h pll5v q13 dtc144eu q14 dtb123ek mu/d protecter d61 ma8062 9...

  • Page 39

    Crystal fil fi1 fl-288 v_apc det d7, d8 rb706f × 2 u_apc det d25, d26 rb706f × 2 u_loop fil q101 2sc3324 q102 2sk880 hi/low ctrl ic5 ta75s01f af amp ic12 la4445 u_af fil q85, q86 2sc4081 × 2 com_mute ic11 tc4s81f q69 2sc4213 u_mute q71 2sc4213 dtmf dec unit (ut-49) option x1 cr-549 15.2 mhz uatt vat...

  • Page 40

    Crystal fil fi1 fl-288 v_apc det d7, d8 rb706f × 2 u_apc det d25, d26 rb706f × 2 u_loop fil q101 2sc3324 q102 2sk880 2sc4081 ma8075 x4 smd-49 v bias sel q34 umg9n 1/2 q35 dtb123ek hi/low ctrl ic5 ta75s01f initial matrix osc1 osc2 eeprom ic17 x25320si eso power sw ctrl q74 dtc143xu q75 2sb1201 af amp...

  • Page 41

    Section 11 voltage diagram control unit ic7 tc7w14fu 1 2 3 4 5 6 7 8 r3 100 r4 100 r5 100 r6 100 r7 100 r8 100 r9 100 r10 100 r11 100 r13 100 r12 100 c57 0.1 r112 10k r287 10k r288 15k r285 10k r286 15k c56 270p w11 w12 8 vpos 3 9 vpos 2 10 vpos 1 11 zoom 12 u/d 13 pol 14 int/ext 15 cpv 16 oev3 17 o...

  • Page 42

    C36 10 + l9 10 h ic7 tc7w14fu 1 2 3 4 5 6 7 8 c55 10 + r3 100 r4 100 r5 100 r6 100 r7 100 r8 100 r9 100 r10 100 r11 100 r13 100 r12 100 c57 0.1 c31 0.1 l7 10 h c33 0.1 c34 10 + c25 0.1 l8 2.7 h r15 470k c23 0.001 r16 10k l16 10 h ic2 tc75s51f + — 1 3 4 5 2 c26 560p c27 0.1 r18 1m r17 68k c30 39p r25...

  • Page 43

    C36 10 + l9 10 h c55 10 + l16 10 h f + — 1 3 5 2 26 60p 27 .1 r17 68k c30 39p r25 27k r26 50k r27 1k c35 0.1 r20 68k r21 22k r22 47k r24 4.7k r23 2.2k c28 0.1 c29 0.1 l10 10 h r106 560 r100 150k r107 680 r109 10k l13 10 h c52 0.1 c53 10 + r290 1.5k r110 150 r164 150 cp1 r292 3.3 3 l c193 220p c194 2...

  • Page 44

    Section 11 voltage diagram control unit c36 10 + l9 10 µ h ic7 tc7w14fu 1 2 3 4 5 6 7 8 c55 10 + r3 100 r4 100 r5 100 r6 100 r7 100 r8 100 r9 100 r10 100 r11 100 r13 100 r12 100 c57 0.1 c31 0.1 l7 10 µ h c33 0.1 c34 10 + c25 0.1 l8 2.7 µ h r15 470k c23 0.001 r16 10k l16 10 µ h ic2 tc75s51f + – 1 3 4...

  • Page 45

    R417 3.9k mu/d m8v ptt mice mic e mdata t d ata r d ata gnd hv is2 is1 is0 ii3 ii2 ii1 ii0 extmic e8 spe micud extmic sp pttp limit lv tonein vsql vsout usql usout clonec dtmf txdf rxdf ctcss q4 q3 q2 q1 tmain std opd vdmute udmute vamute uamute tonein fanc pttm1 pttp1 dmain powc reset ummute vmmute...

  • Page 46

    Mw/n r358 2.2k r455 82k r456 47k r454 82k r441 10k c451 10 + c450 100p + — 3 2 1 4 8 r440 100 r439 82k c447 0.0027 c446 0.1 438 2k r443 47k [eur], [ita] only 2 r], [ita] only r403 1m r404 2.2k r405 10k c433 0.1 r406 22k r391 1k c422 0.001 c423 1 r390 470k r389 2.2k r380 1k c413 0.001 c414 1 r378 2.2...

  • Page 47

    E chassis unit 6 5 fv cp-smu 8v c5v afout hv psql cp-smv vattc uattc lv04 lv03 lv02 lv01 fanc pctrl usql usout v amute uamute udet uam v d ata vck sp r11 33k r12 470 r13 33k r29 4.7k r30 100k r41 820 r42 1k r43 22 r47 100 r62 100 r67 100k r85 39k r120 18k r121 100k r122 10k r123 47k r124 22k r125 10...

  • Page 48

    R417 3.9k mu/d m8v ptt mice mic e mdata t d ata r d ata gnd hv is2 is1 is0 ii3 ii2 ii1 ii0 extmic e8 spe micud extmic sp pttp limit lv tonein vsql vsout usql usout clonec dtmf txdf rxdf ctcss q4 q3 q2 q1 tmain std opd vdmute udmute vamute uamute tonein fanc pttm1 pttp1 dmain powc reset ummute vmmute...

  • Page 49

    Introduction this service manual describes the latest service information for the ic-2800h fm transceiver at the time of publication. To upgrade quality, all electrical or mechanical parts and inter- nal circuits are subject to change without notice or obligation. Danger never connect the transceive...

  • Page 50

    A-5570mi-s © 1999 by icom inc. 6-9-16, kamihigashi, hirano-ku, osaka 547-0002, japan dual band fm transceiver ic-2800h ic-2800h.