Icom Ic-r75 Communications Receiver Service Manual
Here you can view all the pages of manual Icom Ic-r75 Communications Receiver Service Manual. The Icom manuals for Communications receiver are available online for free. You can easily download all the documents as PDF.
Page 41
9 - 1 SECTION 9 BLOCK DIAGRAM ANT2 (450 ½) 450 ½ to 50 ½ 1.6MHz 1.6MHz60MHzANT1 (50 ½) CHASSIS UNIT RL121 MZ-12HG RL141 MZ-12HG 10dB 2MHz 130MHz BW=15kHzR14V REG XTAL BPF IF AMP XTAL BPF XTAL BPF OPTIONAL XTAL BPF NB GATE IF AMP LPF AT T NB DET AGC AMP AGC AMP NOISE AMPNOISE AMPNOISE AMP GATE CTRL LO AMP Q472 XP4311 Q381 2SK2171 4 Q382 2SK2171 4 60MHz Q441 2SK1740 Q442 2SK1740 FI461 FL-261 B0 B1 BW=15kHz Q471 3SK131 MAS D491 HSB88WS FI701 FL-23 D711 MA77 D712 MA77 D713 MA77 D714 MA77 Q721 3SK131 MAS Q735...
Page 42
R211 1 k R210 1 k R209 1 k R208 1 k R206 1 k R205 1 k R203 1 k R204 1 k R202 1 k R201 1 kR271 47 k R273 47 k R275 47 k R277 47 k R279 47 k R281 47 k R283 47 k R285 47 k R287 47 kR272 47 k R274 47 k R276 47 k R278 47 k R282 47 k R280 47 k R284 47 k R286 47 k AFGL RFGL PB1L PB2L FMNL PWRS BPCK RXS AGRS SQLS BKUP DCK RECS ERXD ETXD MWK SML R254 6.8 k R256 6.8 k R255 6.8 k R253 6.8 k R251 6.8 k C206 0.1C205 0.1 C204 0.1 C203 0.1 C202 0.1 C201 0.1 R252 6.8 k5VL R257 6.8 k R258 6.8 k R259 6.8 k R260 6.8 k T1K...
Page 43
R272 47 k R274 47 k R276 47 k R278 47 k R282 47 k R280 47 k R284 47 k R286 47 k R288 47 k R290 47 k R292 47 k L1 DISPLAY BOARD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1616 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1J411 52808-1690 M H5VL DO CL2 14V R422 100 k R421 470 R423 10 k Q421 DTA144EU PWRS PWRC PWRS PWRC CO2SPS R394 1 k R395 470 k D393 1SS355 R396 220 k R397 220 kD401 1SS355 R399 10 k C392 0.22 Q391 2SC4116 BL BKUP CRES R401 33 kR402 6.8 k 3 2 14 5 6 Q401 XP4601 C401 0.1R405 100 k R404 15 k1 214 7 IC401A...
Page 44
R211 1 k R210 1 k R209 1 k R208 1 k R206 1 k R205 1 k R203 1 k R204 1 k R202 1 k R201 1 kR271 47 k R273 47 k R275 47 k R277 47 k R279 47 k R281 47 k R283 47 k R285 47 k R287 47 kR272 47 k R274 47 k R276 47 k R278 47 k R282 47 k R280 47 k R284 47 k R286 47 k AFGL RFGL PB1L PB2L FMNL PWRS BPCK RXS AGRS SQLS BKUP DCK RECS ERXD ETXD MWK SML R254 6.8 k R256 6.8 k R255 6.8 k R253 6.8 k R251 6.8 k C206 0.1C205 0.1 C204 0.1 C203 0.1 C202 0.1 C201 0.1 R252 6.8 k5VL R257 6.8 k R258 6.8 k R259 6.8 k R260 6.8 k T1K...
Page 45
10 - 2 P91 TMP-P01X-A1 5V J91 TBP-P01X-A1 R102 18 C95 0.0047C101 0.0047 C104 0.0047 L92 56 nHL93 68 nH R95 47 C99 2 P C97 8 PR100 3.9 k R50 1 kR51 1 k R52 1 kR53 1 k R110 220 DULS LOF2 VCOS C115 0.0047 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25ETCO075 SYSCLKO VSS 100 VDD DATA CONT_CLK VSS BUSY VSS CON0 CON1 CON2 STRB VSS VSS SYS_CLK VDD VSS BUN4O BUN2O BUM2O VSS BUN4I BUN2I BUM2I VSS2 VSS VDD VDD3 VSS TESTOUT TEOUT H0 TEOUT H1 TEOUT H2 TEOUT H3 TEOUT H4 VDD VDD VSS SYSRESET...
Page 46
C1372.2 C1361 2.2 C1411 0.1L1411 220 µHR 1 R 1 C1412 47 C384 0.1 R386 100D382 MA77D372 MA77ESPO ISPO ESPO ISPO Q381 2SK2171 4 L384 330 µH R372 100 R371 100 C372 10 P C371 0.1L383 LR-171 L381 LR-86L371 220 µH L382 1.5 µH C386 0.1 R361 470 L362 330 µH L361 330 µHR362 470 D381 MA77D371 MA77 C361 1 POFF D391 MA77C381 0.1 PRE1 14V Q382 2SK2171 4 R381 100C382 0.1 C385 0.1 R391 100 C393 0.1GND SETEOUT VCC SETC IN BYPS BYPS 5 6 7 84 3 2 1 IC391 µPC1658GC394 0.1R392 470C396 0.1 R393 100C395 0.1C397 0.1 R395 18...
Page 47
Q801 2SC4081 RR801 1 k C801 0.1R802 100 C811 0.0047R817 2.7 k R816 2.7 k R814 3.3 k R813 470 R812 470R815 3.3 kR821 3.3 k R820 1 k C813 0.1C818 0.1C841 0.0047 R823 10 R822 10 R825 NTCCM16083NH 681KC R811 1.5 k FI761 FL-272 D761 MA77D763 MA77 D762 MA77D764 MA77 R761 2.2 k R763 220 R762 220R765 10 k R764 2.2 k C761 0.1C762 0.1 C781 0.1C782 0.1 2F3K 2FTH 2FOP 8V L711 LS-452L712 LS-452 R712 2.2 kR711 2.2 k C711 0.0047D711 MA77 D712 MA77D713 MA77 D714 MA77 R713 220 C712 0.0047C721 0.0047 Q721 3SK131 MASC722...
Page 48
L911 LS-450 Q912 2SC4081 R R914 10 k R915 10 kC914 2.2 L891 LS-450R892 100 C892 0.0047 Q891 3SK131 MAS R893 2.2 kC893 0.0047R894 22 k C894 0.1R895 330 L1001 220 µH C1010 0.1 Q801 2SC4081 RR801 1 k C801 0.1R802 100 C811 0.0047R817 2.7 k R816 2.7 k R814 3.3 k R813 470 R812 470R815 3.3 kR821 3.3 k R820 1 k C813 0.1C818 0.1C841 0.0047 R823 10 R822 10 R825 NTCCM16083NH 681KC R811 1.5 k D763 MA77 D764 MA77 R765 10 k R764 2.2 k 62 82 R796 2.2 k R794 2.2 kR795 4.7 k C792 0.1 L OPTIONAL FILTER 89 10 IC1211C...
Page 49
L911 LS-450 Q912 2SC4081 R R914 10 k R915 10 kC914 2.2 L891 LS-450R892 100 C892 0.0047 Q891 3SK131 MAS R893 2.2 kC893 0.0047R894 22 k C894 0.1R895 330 L1001 220 µH C1010 0.1 Q801 2SC4081 R R801 1 k C801 0.1R802 100 C811 0.0047R817 2.7 k R816 2.7 k R814 3.3 k R813 470 R812 470R815 3.3 kR821 3.3 k R820 1 k C813 0.1C818 0.1C841 0.0047 R823 10 R822 10 R825 NTCCM16083NH 681KC R811 1.5 k FI761 FL-272 D761 MA77D763 MA77 D762 MA77D764 MA77 R761 2.2 k R763 220 R762 220R765 10 k R764 2.2 k C761 0.1C762 0.1 C781...
Page 50
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 :...