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Manual Icom IC-4008MKII

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  • Icom IC-4008MKII - page 1

    SER VICE MANUAL UHF FM TRANSCEIVER LPD FM TRANSCEIVER ...

  • Icom IC-4008MKII - page 2

    INTRODUCTION DANGER ORDERING P ARTS REP AIR NOTES This service manual describes the latest service information for the at the time of publication. NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 5 V . Such a connection could cause a fire hazard and/or electric. DO NOT expose the transceiver to rain, snow or ...

  • Icom IC-4008MKII - page 3

    T ABLE OF CONTENTS SECTION 1 SPECIFICA TIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASEMBL Y INSTRUCTION SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 -1 4-2 TRANSMITER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Icom IC-4008MKII - page 4

    SECTION 1 SPECIFICA TIONS 1 - 1 All stated specifications are subject to change without notice or obligation. Number of channels T ype of emission Frequency stability Frequency resolution Power supply requirements (negative ground) Current drain Operating temperature range Number of CTCSS frequency Dimensions (proj. not included) Weight (included 3 ...

  • Icom IC-4008MKII - page 5

    CHANNEL FREQUENCY LIST CTCSS FREQUENCY LIST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 433.0750 433.1000 433.1250 433.1500 433.1750 433.2000 433.2250 433.2500 433.2750 433.3000 433.3250 433.3500 433.3750 433.4000 433.4250 433.4500 433.4750 433.5000 433.5250 433.5500 433.5750 433.6000 433.6250 24 25 26 27 28 29 30 31 32 33 34 35 36 ...

  • Icom IC-4008MKII - page 6

    SECTION 2 INSIDE VIEWS 2 - 1 • MAIN UNIT • RF UNIT T+3 Regurator (Q28: 2SB798) +3 Regurator (IC6: S-81230SG) R+3 Regurator (Q18: 2SA1586) CPU (IC1: µ PD753036GK) Audio amplifier (IC9: NJM2070M) EEPROM (IC3: X24C01AS) TOP VEIW BOTTOM VEIW 1st mixer (Q2: 2SC4226) PLL IC (IC1: TB31202FN) 2nd IF filter (Fl3: CFWM450E) 1st IF amplifier (Q1: 2SC4215 ...

  • Icom IC-4008MKII - page 7

    SECTION 3 DISASEMBL Y INSTRUCTIONS 3 - 1 A B B MAIN unit RF unit E C D F H G • REMOVING THE REAR P ANEL Unscrew 1 screw , and 4 screws . Remove the rear panel in the direction of the arrow . • REMOVING THE RF UNIT Remove 1 knob, , and unscrew 1 nut, . Unsolder 1 point, , and then remove the RF unit. • REMOVING THE MAIN UNIT Unscrew 2 screws, ...

  • Icom IC-4008MKII - page 8

    4 - 1 SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT (RF UNIT) Received signals from the antenna connector are passed through the low-pass filter (L5, L6, C8–C12). The filtered sig- nals are applied to the λ ⁄ 4 type antenna switching circuit (D7, D101, D102, L4, L206, C209, C210). The antenna switching cir ...

  • Icom IC-4008MKII - page 9

    4 - 2 • PLL circuit Shift register Prescaler Phase detector Loop filter Programmable counter Programmable divider X1 21.25 MHz to the FM IF IC (IC2, pin 1) VCO Buffer Q7 6 7 8 STB IC1 (PLL IC) CK DATA to transmitter circuit to 1st mixer circuit D2 D1 9 11 14 16 Q6, D4, D5 4-1-6 SQUELCH CIRCUIT (RF AND MAIN UNITS) (1) NOISE SQUELCH The noise squel ...

  • Icom IC-4008MKII - page 10

    4 - 3 LINE BA TT 3V +3V R+3 T+3 DESCRIPTION The voltage from the connected battery pack. Common 3 V converted from the BA TT line at the 3V regulator circuit (IC6). The circuit outputs the voltage regardless of the power ON/OFF condition. Common 3 V converted from the BA TT line at the +3V regulator circuit (Q25, D4). Receive 3 V cotrolled by the R ...

  • Icom IC-4008MKII - page 11

    5 - 1 SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREP ARA TION REQUIRED TEST EQUIPMENT EQUIPMENT DC power supply RF power meter (terminated type) Frequency counter FM deviation meter DC voltmeter GRADE AND RANGE Output voltage : 4.5 V DC Current capacity : 1 A or more Measuring range : 1 mW–1 W Frequency range : 300–600 MHz Impedance : 50 Ω SWR : Le ...

  • Icom IC-4008MKII - page 12

    5 - 2 5-2 ADJUSTMENT REFERENCE FREQUENCY OUTPUT POWER FM DEVIA TION SQUELCH ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT V ALUE POINT UNIT LOCA TION UNIT ADJUST 433.925000 MHz 9 mW [IT A/–1] 470 mW [CSA/–1] ± 4.8 kHz 10 mV ± 3 dB Audio signal disappears. 1 1 1 2 1 2 • Operating channel : Ch 35 • T ransmitting • Operating chann ...

  • Icom IC-4008MKII - page 13

    5 - 3 RF GND J1 RF test por R50 FM deviati Reference frequency adjustment R206 Output power adjustment TEST C63 ENTERING THE ADJUSTMENT MODE  q T urn the transceiver power OFF .  w While connecting the "TEST" to GND, then turn power ON. ...

  • Icom IC-4008MKII - page 14

    SECTION 6 P ARTS LIST 6 - 1 IC1 1 140006881 S.IC µPD753036GK-524-BE9 IC2 1 1 10002820 S.IC NJM2100M-T1 IC3 1 140004450 S.IC X24C01AS-3.0T6 IC5 1 1 10004710 S.IC S-80928ANMP-DDR-T2 IC6 1 180001 150 S.IC S-81230SG-QB-T1 IC9 1 1 10002810 S.IC NJM2070M-T1 Q1 1590000720 S.TRANSIST OR DT A144EUA T106 Q2 1590001860 S.TRANSIST OR UN9215 (TX) Q3 1590000800 ...

  • Icom IC-4008MKII - page 15

    6 - 2 C8 4510004630 S.ELECTROL YTIC ECEV1CA100SR C9 4030006850 S.CERAMIC C1608 JB 1H 471K-T -A C10 4030006850 S.CERAMIC C1608 JB 1H 471K-T -A C1 1 4030006850 S.CERAMIC C1608 JB 1H 471K-T -A C15 403001 1600 S.CERAMIC C1608 JB 1C 104KT -N C17 4550006880 S.T ANT ALUM TEMSVD2 0J 157M-12R C18 4510004630 S.ELECTROL YTIC ECEV1CA100SR C20 403001 1600 S.CER ...

  • Icom IC-4008MKII - page 16

    6 - 3 L206 6200005690 S.COIL ELJRE 18NG-F L207 6200005690 S.COIL ELJRE 18NG-F L208 6200003640 S.COIL MLF1608K 100K-T R1 7030003430 S.RESISTOR ERJ3GEYJ 821 V (820 Ω ) R2 7030003670 S.RESISTOR ERJ3GEYJ 823 V (82 k Ω ) R3 7030003470 S.RESISTOR ERJ3GEYJ 182 V (1.8 k Ω ) R4 7030003450 S.RESISTOR ERJ3GEYJ 122 V (1.2 k Ω ) R5 7030003680 S.RESISTOR ...

  • Icom IC-4008MKII - page 17

    6 - 4 C21 1 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A J1 6910007660 CONNECTOR IMSA-9210B-1-02T J2 6510018170 S.CONNECTOR 4-175643-4 W4 7030003860 S.JUMPER ERJ3GE JPW V W5 7030003860 S.JUMPER ERJ3GE JPW V W6 7030003860 S.JUMPER ERJ3GE JPW V W8 7030003860 S.JUMPER ERJ3GE JPW V W201 7030003860 S.JUMPER ERJ3GE JPW V W202 7030003860 S.JUMPER ERJ3GE JPW ...

  • Icom IC-4008MKII - page 18

    SECTION 7 MECHANICAL P ARTS AND DISASSEMBL Y 7 - 1 Screw abbreviations A, B0, BT : Self-tapping PH: Pan head FH: Flat head BiH: Bind head NI: Nickel SUS: Stainless ZK: Black SP1 2510000960 Speaker K036NA500-26A27 1 EP1 3310002090 Antenna 2045ANT 1 MP1 8210015181 Panel 2045 Front Panel-1 [IT A], [CSA] 1 8210016101 Panel 2045 Front Panel (A)-1 1 [IT ...

  • Icom IC-4008MKII - page 19

    7 - 2 UNIT abbreviation (C): CHASSIS P ARTS, (RF): RF UNIT , (M): MAIN UNIT MP1 (C) SP1 (C) MP10 (C) MP12 (C) EP1 (M) DS2 (M) MP7 (C) MP5 (C) MAIN unit MP20 (C) MP25 (C) MP14 (C) MP23 (C) MP11 (C) MP13 (C) MP4 (C) MP2 (C) MP25 (C) MP9 (C) MP8 (C) RF unit MP24 (C) MP30 (C) MP24 (C) MP22 (C) EP1 (C) MP3 (C) MP1 (RF) ...

  • Icom IC-4008MKII - page 20

    SECTION 8 SEMI-CONDUCT OR INFORMA TION 8 - 1 • DIODES • TRANSISTOR AND FET’S 2SA1362 GR (Symbol: AEG) 2SC4213 B (Symbol: AB) 2SC5108 Y (Symbol: MC) DT A1 14 EU (Symbol: 16) UN51 19 (Symbol: 6K) UN9215 (Symbol: 8E) DTC1 14 EU (Symbol: 14) MRF9745 (Symbol: M745) UMZ1N (Symbol: Z1) UMZ2N (Symbol: Z2) 2SC5194 (Symbol: T88) 2SJ144 Y (Symbol: VX) 2 ...

  • Icom IC-4008MKII - page 21

    SECTION 9 BOARD LA YOUTS 9-1 MAIN UNIT • TOP VIEW (IC-4008A) 9 - 1 C20 R98 R74 R76 C53 C60 IC5 C55 C88 R78 W7 C80 R42 R12 R46 R50 C5 R31 R1 18 C3 R9 R1 10 C25 C7 C79 C4 Q6 R13 Q3 R10 R202 C35 C34 R45 R36 C36 C31 R43 R37 R41 C32 R38 C90 C8 Q7 MC1 C64 Q25 D4 C62 C65 C89 R77 C67 R80 Q18 C17 C52 C18 C49 C48 C81 R23 C63 C97 C96 R26 Q1 1 Q14 Q27 Q101 D ...

  • Icom IC-4008MKII - page 22

    9 - 2 • BOTTOM VIEW (IC-4008A) R58 R88 R54 Q10 C21 C47 C44 C72 R87 C59 R106 C82 R1 12 C46 C87 R103 C51 R62 C92 C94 R97 R63 C45 R79 C86 R68 R69 IC3 Q23 R86 IC9 J4 J1 J3 S1 X1 Q5 C6 C29 R6 R7 R5 R4 R40 R105 R32 R34 C26 C40 C27 C1 1 R33 R2 R108 W1 W4 R60 Q1 C73 C83 R51 R52 C93 C24 R53 C98 R39 R102 Q2 C28 C91 C10 R14 R95 R35 Q12 Q29 R64 R99 R100 R101 ...

  • Icom IC-4008MKII - page 23

    9 - 3 C57 IC6 C20 Q14 IC5 C63 Q27 Q1 1 R26 R49 W3 C74 D303 D5 DS2 C55 C17 C52 C18 C48 C49 R23 R1 14 R302 R89 C9 C42 C75 R90 C71 Q28 D101 C97 R74 R76 R98 C53 C60 C81 C96 D2 DS1 C95 R61 C15 R22 R27 C50 R24 R25 R56 R55 C88 R78 Q18 Q25 D4 W7 C80 C64 C67 C62 R42 R43 C90 MC1 R37 R46 R13 C79 C4 R50 C5 C7 C8 Q7 Q3 Q6 R12 C34 R45 R36 C36 C31 R202 R10 R1 18 ...

  • Icom IC-4008MKII - page 24

    9 - 4 R58 IC9 C6 IC2 C29 C73 R39 R99 R100 R101 R35 C91 C10 R14 R64 W1 W4 Q1 R60 R108 R2 R4 R5 Q2 Q12 Q29 C28 R102 R40 R32 R105 C26 C27 C40 R95 C1 1 R34 R33 R65 R6 R7 C24 R53 R66 C1 C85 R30 C83 R51 R52 C93 C98 Q10 C59 C72 C82 J1 S1 J3 Q23 R87 R106 R301 R1 12 R81 R72 C61 C56 C54 R94 C46 R63 C45 R79 C87 X1 C86 IC1 R103 R57 R96 R70 R71 R67 C92 C94 C51 ...

  • Icom IC-4008MKII - page 25

    9 - 5 9-2 RF UNIT • TOP VIEW R69 R67 R71 R66 C89 R68 C96 L6 L204 L203 D103 L5 L23 C90 C36 C4 R12 C70 C23 R86 Q14 Q13 D9 D8 C81 C82 C48 C43 C86 IC1 R64 R65 R32 R27 C13 R60 R19 R4 C28 C3 L25 C67 R58 Q2 J2 R5 C46 L1 C1 1 C72 R209 R213 R202 W202 W201 L201 C201 C203 C204 L202 C26 Q201 Q202 R205 R93 C87 C62 C61 C18 C17 R10 R45 W4 W6 L15 L208 W5 C68 R62 ...

  • Icom IC-4008MKII - page 26

    9 - 6 • BOTTOM VIEW C79 C83 X1 C63 R52 R88 C15 C16 C69 C55 R36 C57 L14 C64 R34 C52 R31 C53 Q6 L13 R54 C50 R30 R29 C20 L1 1 D4 D5 R35 R33 L12 Q7 Q12 C84 C56 C51 R210 Q8 C60 FI1 FI2 W8 Q1 R3 R2 FI3 J1 R50 R206 C88 C85 R21 1 C21 1 L207 L105 L19 C102 R212 C21 C42 C100 R208 R6 C35 C45 R53 R55 R61 L21 R37 R301 R7 C209 C210 R75 R76 R74 C93 C92 C91 Q16 R ...

  • Icom IC-4008MKII - page 27

    SECTION 10 BLOCK DIAGRAM 10 - 1 CTCIN D/A REMIN PTT2 MICSW RMUT AFON RXV TXV POWER LCD DS2 VOLT SENS RESET IC5 X2 CDBCA450CX24 (450 kHz) FI3: CFWM450E CERAMIC BPF (450 kHz) FMDET S DET IF AMP NOISE DET IC2 TA31136FN 2SC4215 Q13: 2SC4081 Q14: 2SA1586 D8 : 1SS355 D9 : 1SS355 FL-298 Q6: 2SC5108 D4,D5: 1SV284 X1 CR-632 (21.25 MHz) 2nd.Lo: 21.25 MHz 2nd ...

  • Icom IC-4008MKII - page 28

    SECTION 1 1 VOL T AGE DIAGRAM 11 - 1 1 1-1 MAIN UNIT LON: 0 LOF: 3.02 LON: 2.82 LOF: 0 C: 3.02 T: 3.04 R: 2.40 C: 3.82 C: 3.10 C: 1.65 T: 0 R: 0.86 C: 1.95 T: 0 R: 2.97 C: 3.12 T: 0 R: 3.02 C: 3.10 T: 1.58 R: 0 T: 3.05 R: 0 T: 1.46 R: 0 C: 0 C: 3.12 T: 1.48 R: 0 T: 1.45 R: 0 C: 2.50 C: 3.13 T,SC: 0.49 SO: 0.61 T: 0 SO: 2.95 SC: 0 T: 3.94 SO: 3.79 S ...

  • Icom IC-4008MKII - page 29

    1 1-2 RF UNIT 11 - 2 T: 0 R: 2.96 T: 0 R: 0.72 T: 0 R: 1.86 T: 0 R: 2.60 T: 0 R: 1.76 T: 0 R: 0.72 T: 0 R: 1.98 C: 2.83 C: 2.80 T: 0 R: 1.12 T: 1.16 R: 0 T: 0.42 R: 0.36 T: 0.72 R: 0 T: 1.38 R: 0 T: 1.51 R: 0 T: 0.75 R: 0.84 T: 1.20 R: 0 T: 0 R: 0.82 T: 0.57 R: 0 T: 1.47 R: 0 T: 0 R: 2.61 T: 0 R: 0.99 T: 0 R: 1.82 T: 0.18 R: 0.78 T: 0 R: 1.72 T: 0 ...

  • Icom IC-4008MKII - page 30

    6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan Phone : 06 6793 5302 Fax : 06 6793 0013 Communication Equipment Himmelgeister Str . 100, D-40225 Düsseldorf, Germany Phone : 021 1 346047 Fax : 021 1 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 ...

  • Icom IC-4008MKII - page 31

    6-9-16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan A-5505I-S Printed in Japan © 1998 by Icom Inc. ...

Manufacturer Icom Category Marine Radio

Documents that we receive from a manufacturer of a Icom IC-4008MKII can be divided into several groups. They are, among others:
- Icom technical drawings
- IC-4008MKII manuals
- Icom product data sheets
- information booklets
- or energy labels Icom IC-4008MKII
All of them are important, but the most important information from the point of view of use of the device are in the user manual Icom IC-4008MKII.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Icom IC-4008MKII, service manual, brief instructions and user manuals Icom IC-4008MKII. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Icom IC-4008MKII.

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A complete manual for the device Icom IC-4008MKII, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Icom IC-4008MKII by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Icom IC-4008MKII.

A complete Icom manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Icom IC-4008MKII - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Icom IC-4008MKII, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Icom IC-4008MKII, that we can find in the current document
3. Tips how to use the basic functions of the device Icom IC-4008MKII - which should help us in our first steps of using Icom IC-4008MKII
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Icom IC-4008MKII
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Icom IC-4008MKII in a specific country, if it was not possible to solve the problem on our own.

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