Icom Ic4008a/Mk2 Uhf Fm Tranciever Service Manual
Here you can view all the pages of manual Icom Ic4008a/Mk2 Uhf Fm Tranciever Service Manual. The Icom manuals for Communications receiver are available online for free. You can easily download all the documents as PDF.
Page 21
SECTION 9 BOARD LAYOUTS 9-1 MAIN UNIT •TOP VIEW (IC-4008A) 9 - 1 C20 R98R74 R76 C53 C60 IC5 C55 C88 R78 W7 C80 R42 R12 R46 R50 C5 R31 R118C3 R9 R110 C25 C7 C79 C4 Q6 R13 Q3R10R202C35 C34 R45R36 C36 C31 R43 R37R41 C32 R38 C90 C8 Q7 MC1 C64 Q25 D4 C62 C65 C89R77C67R80Q18 C17 C52C18 C49 C48 C81 R23C63 C97 C96 R26 Q11 Q14 Q27 Q101 D5Q28 DS2 R114 R200 R119 R115 R201C42 C9 C75 R89C71 C74R90 R49 D101 D2DS1 C95 R22 R27 C50 W3 R24 R25 R55 R56 C15 R61 C57 IC6
Page 22
9 - 2 •BOTTOM VIEW (IC-4008A) R58R88 R54 Q10 C21 C47 C44 C72 R87 C59 R106C82 R112 C46 C87 R103 C51 R62 C92 C94 R97R63 C45 R79 C86 R68 R69IC3 Q23 R86 IC9 J4J1J3 S1 X1Q5 C6 C29 R6 R7 R5R4 R40 R105 R32 R34 C26 C40C27 C11 R33R2 R108 W1 W4 R60 Q1C73 C83 R51 R52 C93 C24 R53 C98R39 R102Q2C28 C91 C10 R14 R95 R35 Q12 Q29 R64 R99 R100 R101 IC1 R65 R66 R81 R72 C56 C54 R94C61 R96 R57 R70 R71 R67C1 C85 IC2 R30 PSC BATT MOD T+3 VOL R+3 GNDUNLK CK D ATA STB SQL SENS AF 13 1 214J4 to RF unit J2
Page 23
9 - 3 C57 IC6 C20 Q14 IC5 C63 Q27 Q11R26 R49 W3 C74 D303D5 DS2 C55 C17C52C18C48 C49 R23 R114 R302R89C9 C42 C75 R90 C71 Q28D101 C97 R74 R76 R98 C53 C60 C81 C96 D2DS1 C95 R61C15R22 R27 C50 R24 R25 R56R55 C88 R78 Q18 Q25 D4 W7 C80 C64 C67C62 R42 R43 C90 MC1 R37 R46 R13 C79 C4 R50 C5C7 C8 Q7 Q3 Q6 R12 C34 R45R36 C36 C31 R202 R10 R118 R31 R110 C25 R9 C3C35 R41 C32 R38 C65 R77 C89R80
Page 24
9 - 4 R58 IC9 C6 IC2 C29 C73 R39 R99 R100 R101 R35 C91 C10 R14R64 W1 W4 Q1 R60 R108R2 R4 R5 Q2Q12 Q29 C28 R102 R40 R32 R105 C26 C27 C40 R95C11 R34 R33 R65 R6 R7 C24 R53 R66C1 C85 R30 C83 R51 R52 C93 C98 Q10 C59 C72 C82 J1 S1J3 Q23 R87 R106 R301 R112 R81 R72 C61 C56 C54 R94 C46 R63 C45 R79 C87 X1 C86 IC1 R103 R57 R96 R70 R71 R67 C92 C94 C51R97 R62 R69 R68IC3J4Q5 Q44R54 R88 C21R86 C47 PSC BATT MOD T+3 VOL R+3 GNDUNLK CK D ATA STB SQL SENS AF 13 1 214J4 to RF unit J2
Page 25
9 - 5 9-2 RF UNIT •TOP VIEW R69 R67 R71 R66 C89 R68 C96 L6 L204L203 D103 L5 L23 C90C36C4 R12 C70 C23 R86Q14Q13D9 D8 C81 C82 C48C43 C86 IC1 R64 R65 R32R27 C13 R60 R19 R4 C28 C3L25 C67 R58 Q2 J2 R5 C46 L1 C11C72R209R213R202 W202 W201L201 C201 C203 C204 L202 C26 Q201 Q202 R205R93 C87C62C61 C18 C17R10 R45W4 W6 L15 L208 W5 C68R62 C206 C202 C65 C208 C9 C30 L205 C44C31 D7 C207 C12 C10 C8 L10 Q15 GND R+3 VOL T+3 MOD BATT PSCAF SENS SQL STB D ATA CK UNLK 1 13 14 2J2 to MAIN unit J4
Page 26
9 - 6 •BOTTOM VIEW C79 C83 X1 C63 R52 R88 C15 C16 C69 C55 R36 C57 L14 C64 R34 C52 R31 C53 Q6L13 R54 C50 R30 R29 C20 L11 D4 D5 R35 R33 L12 Q7 Q12 C84 C56 C51 R210Q8 C60 FI1 FI2 W8 Q1R3 R2 FI3 J1 R50 R206 C88 C85 R211C211L207 L105 L19 C102 R212 C21C42 C100 R208 R6 C35 C45 R53 R55 R61 L21R37 R301 R7 C209 C210 R75 R76 R74 C93 C92 C91 Q16 R83 L3 C6 D102 D101 R207 Q3 C32 R16 C5R70 R72 R73 C95 C205 R25 L4L206 C7 C75 C76 R56 R54 X2 D2 D1 R59 IC2C1 C78 C77 R1 R57C2 C80 C74 R51 C73
Page 27
SECTION 10 BLOCK DIAGRAM 10 - 1 CTCIND/A REMIN PTT2 MICSW RMUT AFON RXV TXV POWER LCD DS2 VOLT SENSRESET IC5 X2 CDBCA450CX24 (450 kHz) FI3: CFWM450E CERAMIC BPF (450 kHz) FMDET S DETIF AMP NOISE DETIC2 TA31136FN 2SC4215Q13: 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 MIX IC1 TB31202FN UNLOCK DATA,CK,STBQ1FI2 ATT Q7 2SC5108 R50 MOD LEVEL SET VCO BUFFLO SW D1: MA77 D2: MA77TX/RX SW 2SC3356PWR AMP DRIVE AMP MA2S728 PRE DRIVED7:...
Page 28
SECTION 11 VOLTAGE DIAGRAM 11 - 1 11-1 MAIN UNIT LON: 0 LOF: 3.02 LON: 2.82 LOF: 0 C: 3.02 T: 3.04 R: 2.40 C: 3.82C: 3.10 C: 1.65 T: 0 R: 0.86C: 1.95 T: 0 R: 2.97C: 3.12 T: 0 R: 3.02 C: 3.10 T: 1.58 R: 0T: 3.05 R: 0 T: 1.46 R: 0C: 0C: 3.12 T: 1.48 R: 0T: 1.45 R: 0 C: 2.50 C: 3.13T,SC: 0.49 SO: 0.61 T: 0 SO: 2.95 SC: 0T: 3.94 SO: 3.79 SC: 3.98 T: 0 SO: 2.33 SC: 0T: 0 SC: 0 SO: 4.50 T,SC: 0.43 SO: 1.93 T: 1.07 R: 0 T: 3.70 R: 4.00 T: 0.43 R: 0 T: 0.50 R: 0T: 2.77 SO: 0 SC: 2.77T: 0 R: 3.12 T: 3.00 R: 0...
Page 29
11-2 RF UNIT 11 - 2 T: 0 R: 2.96T: 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: 2.83C: 2.80T: 0 R: 1.12 T: 1.16 R: 0 T: 0.42 R: 0.36 T: 0.72 R: 0T: 1.38 R: 0 T: 1.51 R: 0 T: 0.75 R: 0.84T: 1.20 R: 0 T: 0 R: 0.82T: 0.57 R: 0 T: 1.47 R: 0 T: 0 R: 2.61 T: 0 R: 0.99 T: 0 R: 1.82T: 0.18 R: 0.78 T: 0 R: 1.72 T: 0 R: 0.95T: 2.85 R: 0.01 C: 1.22 C: 2.01 C: 0.75 C: 0.70 T: 1.56 R: 0.02C: 4.5 T: 0 R: 2.96C: 3.06 C: 2.49 C: 2.99 C: 3.02 R52 560 R53 100 kC74 470 P C73 0.1 C75 470...
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 : 0211 346047 Fax : 0211 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.icomuk.co.uk Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, France Phone : 561 36 03 03 Fax : 561 36 03 00 URL :...