Icom ic-r20 Service Manual
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Icom ic-r20 Service Manual

Icom ic-r20 Service Manual

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Download this manual See also: Instruction Manual
Jan. 2010
SERVICE MANUAL
ADDENDUM
CONTENTS
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VOLTAGE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . 16

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  • Page 1 Jan. 2010 SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST ....... . 1 UNIT LAYOUTS .

  • Page 2: Parts List

    Jan. 2010 SECTION 6. SECTION 6. PARTS LIST [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1110005230 S.IC UPC2757TB-E3 45.4/5.4 D100 1750001830 S.VAR SVC389-TL-E 2.7/15.3 1110003201 S.IC TA31136FNG(EL) 8.4/11.5 D101 1790001261 S.DIO MA2S077G0L 71.7/6.7 IC10 1110005230 S.IC UPC2757TB-E3 27.9/3.9 D106 1750000940 S.DIO...
  • Page 3 Jan. 2010 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 6200008570 S.COI LQW2BHN6N8D03L 63.4/12.2 R177 7030005090 S.RES ERJ2GEJ 104 X (100K) 17.8/24.9 6200008570 S.COI LQW2BHN6N8D03L 66.9/15.6 R179 7030005100 S.RES ERJ2GEJ 154 X (150K) 14.4/22.8 6200004720 S.COI MLF1608D R10K-T 74.6/18 R203 7030004980 S.RES ERJ2GEJ 101 X (100)
  • Page 4 Jan. 2010 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION R438 7030005090 S.RES ERJ2GEJ 104 X (100K) 6.2/41.6 4030017460 S.CER ECJ0EB1E102K 65.4/16.7 R439 7030005030 S.RES ERJ2GEJ 152 X (1.5K) 2.9/40.6 4030017460 S.CER ECJ0EB1E102K 70.3/45.4 R440 7030005240 S.RES ERJ2GEJ 473 X (47K) 4.7/43 4030017640 S.CER ECJ0EC1H150J 68.5/7.5...
  • Page 5 Jan. 2010 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C530 4030017450 S.CER ECJ0EB1E271K 68.2/10.6 C771 4030016790 S.CER ECJ0EB1C103K 4.9/37.8 C531 4030017430 S.CER ECJ0EC1H101J 63.7/11.5 C772 4030017460 S.CER ECJ0EB1E102K 3.9/37.8 C532 4030016930 S.CER ECJ0EB1A104K 73.9/4.8 C773 4030016930 S.CER ECJ0EB1A104K 7.7/42.2 C533 4030017910 S.CER ECJ0EB1H152K...
  • Page 6 Jan. 2010 [RF UNIT] [1STAVCO UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C902 4030017420 S.CER ECJ0EC1H470J 53.6/42.8 1110005180 S.IC UPC2746TB-E3 20.3/10.9 C903 4030017420 S.CER ECJ0EC1H470J 53.6/41.3 1130011660 S.IC MB15T61ULPVA-G-ER 10.3/13.1 C904 4030017420 S.CER ECJ0EC1H470J 53.6/39.8 C905 4030017420 S.CER ECJ0EC1H470J 53.5/38.3 C906 4030017420 S.CER ECJ0EC1H470J 51.8/22.3...
  • Page 7 Jan. 2010 [1STAVCO UNIT] [1STBVCO UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005120 S.RES ERJ2GEJ 102 X (1K) [EUR] B 6.7/11.7 1110005180 S.IC UPC2746TB-E3 20.6/12.4 7030005120 S.RES ERJ2GEJ 102 X (1K) [UK] 1130011660 S.IC MB15T61ULPVA-G-ER 10/13.3 7030005120 S.RES ERJ2GEJ 102 X (1K) [USA] 7030005120 S.RES ERJ2GEJ 102 X (1K) [FRA]...
  • Page 8 Jan. 2010 [1STBVCO UNIT] [1STBVCO UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005120 S.RES ERJ2GEJ 102 X (1K) 6.4/16.7 6910015521 CON IMSA-9230B-1-07Z064-PT1 7030005120 S.RES ERJ2GEJ 102 X (1K) 5.8/15.1 6910015511 CON IMSA-9230B-1-08Z064-PT1 7030008300 S.RES ERJ2GEJ 184 X (180K) 5.1/16.7 7030005090 S.RES ERJ2GEJ 104 X (100K) 3.3/13.3 7030005090 S.RES ERJ2GEJ 104 X (100K) 4.3/13.4...
  • Page 9 Jan. 2010 [2NDCVCO UNIT] [2NDDVCO UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 5.6/11.4 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 5.6/11.4 1530003612 S.TRA FH102A-TR-E 6.1/11.8 1530003612 S.TRA FH102A-TR-E 6.1/11.8 1530003592 S.TRA 2SC5277A-2-TL-E 3.5/8.9 1530003592 S.TRA 2SC5277A-2-TL-E 3.5/8.9 1530003630 S.TRA 2SC4617 TLS 2.3/13.6 1530003630 S.TRA 2SC4617 TLS...
  • Page 10 Jan. 2010 [DOWNCONV UNIT] [DOWNCONV UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1110005120 S.IC UPC2749TB-E3 8.4/5.2 4030017730 S.CER ECJ0EB1E471K 5.7/11.1 1110005230 S.IC UPC2757TB-E3 11/5.5 4030017730 S.CER ECJ0EB1E471K 2/13.5 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 7.9/9.7 4030017350 S.CER ECJ0EC1H020B 4.8/12.6 4030017730 S.CER ECJ0EB1E471K 8.5/13.1 4030017730 S.CER ECJ0EB1E471K 11.2/11.9 1530003260 S.TRA...
  • Page 11 Jan. 2010 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130014370 S.IC CAT24C256XI-T2 72.5/21.5 1790000671 S.DIO SB07-03C-TB-E 28.9/37 1130011980 S.IC BD5228G-TR 72.6/3.1 1790001241 S.DIO MA2S7280GL 28.6/40.6 1140012100 S.IC M30620MCP-129GP 1790000861 S.DIO MA3S1330GL 7.3/32.4 (RX-2699B J/E) [EUR] B 54.1/20 1750001830 S.VAR SVC389-TL-E 95.1/48.8...
  • Page 12 Jan. 2010 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION R107 7030005160 S.RES ERJ2GEJ 105 X (1M) 79.2/9.5 R216 7030010040 S.RES ERJ2GEJ-JPW 70/7.6 R108 7030005170 S.RES ERJ2GEJ 474 X (470K) 79.2/10.5 R217 7030005090 S.RES ERJ2GEJ 104 X (100K) 58.3/36.2 R110 7030005080 S.RES ERJ2GEJ 823 X (82K)
  • Page 13 Jan. 2010 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C106 4510008040 S.ELE EEFCD 0K 330R 39.3/36.2 DS11 5040002990 S.LED SML-512UWT86 32.8/6.6 C107 4550007510 S.TAN F931C106MBABMA 28/41.4 DS12 5030002691 LCD M3-0243TIY-1 C108 4030016930 S.CER ECJ0EB1A104K 76.5/40.7 C109 4030016930 S.CER ECJ0EB1A104K 76.6/28.6 C110 4030016930 S.CER ECJ0EB1A104K...
  • Page 14 Jan. 2010 [REC UNIT] PARTS DESCRIPTION LOCATION 1130011980 S.IC BD5228G-TR 12.2/15.2 1140012090 S.IC M30622M6P-131GP (RX-2699A ALL) 14.9/26.2 1130011681 S.IC FT245BL 27.4/16.7 1130012250 S.IC SN74AHC1G02DCKR 9.3/37.3 1130012260 S.IC SN74AHC1G32DCKR 7.5/35.5 1130011971 S.IC K9F5608U0D-PCB0 <TOMO> 24.2/12.2 1190001951 S.IC ML2302TBZ03A 19.7/28.2 1130011801 S.IC SN74AHC1G66HDBV3 24.5/38.3 1130011801 S.IC...
  • Page 15 Jan. 2010 The combination of top side and bottom side of this SECTION 9. SECTION 9. BOARD LAYOUTS • LOGIC UNIT (TOP VIEW) C176 R195 C185 R198 C183 C196 DS11 B6077D AFOUT – [SP/CI-V] [DC]...
  • Page 16 Jan. 2010 The combination of top side and bottom side of this to RF UNIT J1 B_DET • LOGIC UNIT B_R3V B_NOISE (BOTTOM VIEW) B_VCO2 B_RSSI B_VCO3 B_VCO4 Li-ion Battery PLLCK – PLLBSTB PLLDATA PLLDSTB STR2 C127 PLLESTB R203 R204 PLLCSTB R105 R139...
  • Page 17 Jan. 2010 433 MHz SECTION 11. VOLTAGE DIAGRAM 3.0V B_R3V B_R3V Explanatory notes IC15 µPC2757TB VOLTAGE LINE IC16 RX LINE µPC2757TB IFO16 FI1 EFCH266MKQP1 C436 RF UNIT (1/2) 1 RFI 2 GND C746 C748 3 LO B_R3V 3.5p 0.001 R423 C750 0.001 A_R3V...
  • Page 18 Jan. 2010 RF UNIT (2/2) B_R3V B_R3V B_R3V AM/NFM CONT AM/NFM CONT B_R3V B_R3V B_R3V C779 C780 AM/NFM_CONT C885 C757 R445 R446 Q553 B_R3V R430 0.01 0.001 C882 C775 C776 433 MHz R425 R435 CFWM450E XP1113 FI7 FL-293 0.001 L104 0.22 3.0V L102...
  • Page 19 Jan. 2010 23 25 LCD_CS LCD_RESET LCD_RS 3.1V DATA DATA C66 1 TC7SU04F F C67 1 BFO_SHIFT to_LCD C71 1 DS12 C72 1 XP4601 M3-0243TIY CW/BFO_ON B_TCON 2.8V C184 1 2SA1588 GR F PCON C75 1 C76 1 C78 1 R201 C188 0.01...
  • Page 20 VOLTAGE DIAGRAM ......22 [VERSION LIST] Battery Model Version AC adapter pack [EUR] BC-149D [UK] – BP-206 [USA] BC-153SA [FRA] BC-149D IC-R20 [SEA] – – [EXP-01] BC-149A [EXP-02] BC-149D BP-206 [CAN] BC-153SA [CHN] BC-153SC...

  • Page 21: Parts List

    Aug. 2009 SECTION 6. SECTION 6. PARTS LIST [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1110005230 S.IC UPC2757TB-E3 45.4/5.4 D100 1720000821 S.VAR SVC347S/T-TL-E 2.7/15.3 1110003201 S.IC TA31136FNG(EL) 8.4/11.5 D101 1790001261 S.DIO MA2S077G0L 71.7/6.7 IC10 1110005230 S.IC UPC2757TB-E3 27.9/3.9 D106 1750000940 S.DIO...
  • Page 22 Aug. 2009 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 6200008570 S.COI LQW2BHN6N8D03L 63.4/12.2 R177 7030005090 S.RES ERJ2GEJ 104 X (100K) 17.8/24.9 6200008570 S.COI LQW2BHN6N8D03L 66.9/15.6 R179 7030005100 S.RES ERJ2GEJ 154 X (150K) 14.4/22.8 6200004720 S.COI MLF1608D R10K-T 74.6/18 R203 7030004980 S.RES ERJ2GEJ 101 X (100)
  • Page 23 Aug. 2009 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION R438 7030005090 S.RES ERJ2GEJ 104 X (100K) 6.2/41.6 4030017460 S.CER ECJ0EB1E102K 65.4/16.7 R439 7030005030 S.RES ERJ2GEJ 152 X (1.5K) 2.9/40.6 4030017460 S.CER ECJ0EB1E102K 70.3/45.4 R440 7030005240 S.RES ERJ2GEJ 473 X (47K) 4.7/43 4030017640 S.CER ECJ0EC1H150J 68.5/7.5...
  • Page 24 Aug. 2009 [RF UNIT] [RF UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C530 4030017450 S.CER ECJ0EB1E271K 68.2/10.6 C771 4030016790 S.CER ECJ0EB1C103K 4.9/37.8 C531 4030017430 S.CER ECJ0EC1H101J 63.7/11.5 C772 4030017460 S.CER ECJ0EB1E102K 3.9/37.8 C532 4030016930 S.CER ECJ0EB1A104K 73.9/4.8 C773 4030016930 S.CER ECJ0EB1A104K 7.7/42.2 C533 4030017910 S.CER ECJ0EB1H152K...
  • Page 25 Aug. 2009 [RF UNIT] [1STAVCO BOARD] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C902 4030017420 S.CER ECJ0EC1H470J 53.6/42.8 1110005180 S.IC UPC2746TB-E3 20.3/10.9 C903 4030017420 S.CER ECJ0EC1H470J 53.6/41.3 1130011660 S.IC MB15T61ULPVA-G-ER 10.3/13.1 C904 4030017420 S.CER ECJ0EC1H470J 53.6/39.8 C905 4030017420 S.CER ECJ0EC1H470J 53.5/38.3 C906 4030017420 S.CER ECJ0EC1H470J 51.8/22.3...
  • Page 26 Aug. 2009 [1STAVCO BOARD] [1STBVCO BOARD] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005120 S.RES ERJ2GEJ 102 X (1K) [EUR] B 6.7/11.7 1110005180 S.IC UPC2746TB-E3 20.6/12.4 7030005120 S.RES ERJ2GEJ 102 X (1K) [UK] 1130011660 S.IC MB15T61ULPVA-G-ER 10/13.3 7030005120 S.RES ERJ2GEJ 102 X (1K) [USA] 7030005120 S.RES ERJ2GEJ 102 X (1K) [FRA]...
  • Page 27 Aug. 2009 [1STBVCO BOARD] [1STBVCO BOARD] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005120 S.RES ERJ2GEJ 102 X (1K) 6.4/16.7 6910015521 CON IMSA-9230B-1-07Z064-PT1 7030005120 S.RES ERJ2GEJ 102 X (1K) 5.8/15.1 6910015511 CON IMSA-9230B-1-08Z064-PT1 7030008300 S.RES ERJ2GEJ 184 X (180K) 5.1/16.7 7030005090 S.RES ERJ2GEJ 104 X (100K) 3.3/13.3 7030005090 S.RES ERJ2GEJ 104 X (100K) 4.3/13.4...
  • Page 28 Aug. 2009 [2NDCVCO BOARD] [2NDDVCO BOARD] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 5.6/11.4 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 5.6/11.4 1530003612 S.TRA FH102A-TR-E 6.1/11.8 1530003612 S.TRA FH102A-TR-E 6.1/11.8 1530003592 S.TRA 2SC5277A-2-TL-E 3.5/8.9 1530003592 S.TRA 2SC5277A-2-TL-E 3.5/8.9 1530003630 S.TRA 2SC4617 TLS 2.3/13.6 1530003630 S.TRA 2SC4617 TLS...
  • Page 29 Aug. 2009 [DOWNCONV BOARD] [DOWNCONV BOARD] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1110005120 S.IC UPC2749TB-E3 4030017730 S.CER ECJ0EB1E471K 1110005230 S.IC UPC2757TB-E3 4030017730 S.CER ECJ0EB1E471K 1130011671 S.IC MB15E03SLPFV1-G-ER-6E1 4030017350 S.CER ECJ0EC1H020B 4030017730 S.CER ECJ0EB1E471K 4030017730 S.CER ECJ0EB1E471K 1530003260 S.TRA 2SC5006-T1 4030017340 S.CER ECJ0EC1H010B 1530003260 S.TRA 2SC5006-T1 4030017570 S.CER ECJ0EC1H040B...
  • Page 30 Aug. 2009 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130014370 S.IC CAT24C256XI-T2 72.5/21.5 1790000671 S.DIO SB07-03C-TB-E 28.9/37 1130011980 S.IC BD5228G-TR 72.6/3.1 1790001241 S.DIO MA2S7280GL 28.6/40.6 1140012100 S.IC M30620MCP-129GP 1790000861 S.DIO MA3S1330GL 7.3/32.4 (RX-2699B J/E) [EUR] B 54.1/20 1140012100 S.IC M30620MCP-129GP (RX-2699B J/E)
  • Page 31 Aug. 2009 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION R108 7030005170 S.RES ERJ2GEJ 474 X (470K) 79.2/10.5 R217 7030005090 S.RES ERJ2GEJ 104 X (100K) 58.3/36.2 R110 7030005080 S.RES ERJ2GEJ 823 X (82K) 81.8/10 R111 7030010040 S.RES ERJ2GEJ-JPW 40/32.3 R112 7030005310 S.RES ERJ2GEJ 124 X (120K)
  • Page 32 Aug. 2009 [LOGIC UNIT] [LOGIC UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C107 4550007510 S.TAN F931C106MBABMA 28/41.4 DS12 5030002691 LCD M3-0243TIY-1 C108 4030016930 S.CER ECJ0EB1A104K 76.5/40.7 C109 4030016930 S.CER ECJ0EB1A104K 76.6/28.6 C110 4030016930 S.CER ECJ0EB1A104K 86.7/26.5 2250000200 ENC TP90N00E20-16F-1517 C111 4030016930 S.CER ECJ0EB1A104K 86.1/13.5 2250000200 ENC...
  • Page 33 Aug. 2009 [REC UNIT] PARTS DESCRIPTION LOCATION 1130011980 S.IC BD5228G-TR 12.2/15.2 1140012090 S.IC M30622M6P-131GP (RX-2699A ALL) 14.9/26.2 1130011681 S.IC FT245BL 27.4/16.7 1130012250 S.IC SN74AHC1G02DCKR 9.3/37.3 1130012260 S.IC SN74AHC1G32DCKR 7.5/35.5 1130011971 S.IC K9F5608U0D-PCB0 <TOMO> 24.2/12.2 1190001951 S.IC ML2302TBZ03A 19.7/28.2 1130011801 S.IC SN74AHC1G66HDBV3 24.5/38.3 1130011801 S.IC...
  • Page 34 Aug. 2009 The combination of top side and bottom side of this SECTION 9. SECTION 9. BOARD LAYOUTS • LOGIC UNIT (TOP VIEW) C176 R195 C185 R198 C183 C196 DS11 B6077C AFOUT – [SP/CI-V] [DC]...
  • Page 35 Aug. 2009 The combination of top side and bottom side of this to RF UNIT J1 B_DET • LOGIC UNIT B_R3V B_NOISE (BOTTOM VIEW) B_VCO2 B_RSSI B_VCO3 B_VCO4 Li-ion Battery PLLCK – PLLBSTB PLLDATA PLLDSTB STR2 C127 PLLESTB R203 R204 PLLCSTB R105 R139...
  • Page 36 Aug. 2009 The combination of top side and bottom side of this • RF UNIT (TOP VIEW) L101 R499 (Chassis earth) R523 C886 C749 R449 L106 IC16 C756 C436 R497 R427 (Chassis earth) C746 R447 D133 C887 R423 D136 R537 D134 IC18 D131...
  • Page 37 Aug. 2009 The combination of top side and bottom side of this • RF UNIT (BOTTOM VIEW) D147 C779 R446 C504 C545 C918 C775 D146 C541 R238 C780 C834 R483 L105 L120 Q508 R481 C667 C832 C880 D145 C674 L119 C785 R234 C828...
  • Page 38 Aug. 2009 The combination of top side and bottom side of this • REC UNIT AOUT (TOP VIEW) VL UP B_AIN VL DOWN A_ATN IC10 SUB_3C VOL_UP_DOWN CPU_TX CPU_RX...
  • Page 39 Aug. 2009 The combination of top side and bottom side of this • REC UNIT (BOTTOM VIEW) B6084E...
  • Page 40 Aug. 2009 The combination of this page and next page shows the top side and bottom side of actual P.C. board. • 1STAVCO BOARD • 2NDCVCO BOARD (TOP VIEW) (TOP VIEW) to RF UNIT HJ5 B6080D • DOWNCONV BOARD (TOP VIEW) to RF UNIT HJ4 •...
  • Page 41 Aug. 2009 The combination of this page and next page shows the top side and bottom side of actual P.C. board. •1STAVCO BOARD (BOTTOM VIEW) •2NDCVCO BOARD (BOTTOM VIEW) C-VCO PLLCK • DOWNCONV BOARD PLLDATA A_VCO_OUT PLLASTB (BOTTOM VIEW) A_VCO3 A_VCO2 A_VCO1 A_R3V...
  • Page 42 Aug. 2009 433 MHz SECTION 11. VOLTAGE DIAGRAM 3.0V B_R3V B_R3V Explanatory notes IC15 µPC2757TB VOLTAGE LINE IC16 RX LINE µPC2757TB IFO16 FI1 EFCH266MKQP1 C436 RF UNIT (1/2) 1 RFI 2 GND C746 C748 3 LO B_R3V 3.5p 0.001 R423 C750 0.001 A_R3V...
  • Page 43 Aug. 2009 RF UNIT (2/2) B_R3V B_R3V B_R3V AM/NFM CONT AM/NFM CONT B_R3V B_R3V B_R3V C779 C780 AM/NFM_CONT C885 C757 R445 R446 Q553 B_R3V R430 0.01 0.001 C882 C775 C776 433 MHz R425 R435 CFWM450E XP1113 FI7 FL-293 0.001 L104 0.22 3.0V L102...
  • Page 44 Aug. 2009 23 25 LCD_CS LCD_RESET LCD_RS 3.1V DATA DATA C66 1 TC7SU04F F C67 1 BFO_SHIFT to_LCD C71 1 DS12 C72 1 XP4601 M3-0243TIY CW/BFO_ON B_TCON 2.8V C184 1 2SA1588 GR F PCON C75 1 C76 1 C78 1 R201 C188 0.01...
  • Page 45 Aug. 2009 REC UNIT X2 CR-708 16.384 MHz 0.01 0.01 I/O7 I/O6 DVDD I/O5 I/O4 CBUSY CBUSY RESET DVDD ML2302TBZ03A RESET FIFOST TEST2 FIFOST TEST3 DGND TEST4 TEST5 P12/D10 P42/A18 I/O3 TEST6 P11/D9 P43/A19 I/O2 TEST7 SPVDD P10/D8 P44/CS0 I/O1 TEST8 AVDD P07/D7...
  • Page 46 Aug. 2009 PLLBSTB R57* R57 1k R57* 0.01 0.001 PLLDATA RF unit R56* R56 1k PLLCK 3.0V PLLASTB R56* R55* PLLDATA R55 1k RF unit 3.0V PLLCK 3.0V R55* 2.3V 0.01 2.6V 3.0V 2.3V 0.01 0.01 180k 2.6V MB15T61UL 100k 100k 100k 0.01...
  • Page 47 Aug. 2009 2.4V 3.0V 2SC4617 A _ R3V A _ R3V 1CVCO RF unit C _ VCO _ OUT 33nH 2.3V 0.001 0.001 2.8V RF _ IN RF _ IN RF _ IN C _ VCO _ OUT 0.001 2.2V 0.01 22nH 0.22µH...
  • Page 48 SERVICE MANUAL COMMUNICATIONS RECEIVER iC-r20...
  • Page 49 5. DO NOT keep power ON for a long time when the receiver is defective. 6. READ the instructions of test equipment thoroughly before connecting equipment to the receiver. Icom, Icom Inc. and are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.

  • Page 50: Table Of Contents

    TABLE OF CONTENTS SECTION SPECIFICATIONS SECTION INSIDE VIEWS SECTION DISASSEMBLY INSTRUCTIONS SECTION CIRCUIT DESCRIPTION RECEIVER CIRCUITS ......... . . 4 - 1 PLL CIRCUITS .

  • Page 51: Specifications

    SECTION 1 SPECIFICATIONS • IC-R20 RECEIVER GENERAL • Receiver system : Triple super heterodyne and down convertor • Frequency coverage • Intermediate frequency : 1st 266.7 and 429.1 MHz 2nd 19.65 MHz Receive coverage (MHz) Version 450 kHz [EUR], [UK], •...
  • Page 52 • BC-156 • Input voltage : 8.0–16.0 V • Charging current : 0.96–1.44 A (Rapid charging) • Usable temperature : 0˚C to +35˚C (+32˚F to +95˚F) • Timer device : 192–288 minutes (Rapid charging) 12–18 minutes (Reserve charging) • Protect function FUNCTION BP-206 CONDITION BC-156 ACTION...

  • Page 53: Inside Views

    SECTION 2 INSIDE VIEWS 2-1 RF UNIT • Top view B-UHF RF amplifier A/B-UHF (pre-amplifier (Q551: PA805T) (Q548: 2SC5006) Highpass filter circuit (C854, C856, C858) Lowpass filter circuit (L123—L125) A-UHF RF amplifier 1G RF amplifier (Q35: 2SC5006) (Q26: 2SC5624) 30—300 MHz RF amplifier (Q36: 2SC5006) 470—833 MHz RF amplifier...
  • Page 54 2-2 LOGIC UNIT • Bottom view • Top view AF amplifier regulator (Q7: XP1501 Q9: 2SB1132) AF amplifier (IC15: TA31056F Q8: 2SA1588) (DS12: M3-0243TIY) BFO circuit IC6: SN74AHC1GU04DBVR X2: CSBFB543K AF pre-amplifiers (Q12, Q16: 2SC4617) +3 regulators (Q10, Q15: 2SA1362) Reset IC A-BAND AF circuit (IC2: BD5228G)

  • Page 55: Section 3 Disassembly Instructions

    SECTION 3 DISASSEMBLY INSTRUCTIONS (1) REMOVING THE REAR PANEL (3) REMOVING THE REC UNIT q Unscrew 4 screws, A (2 × 115 mm, black). q Unscrew 4 flat-head screws, H (2 × 4 mm, silver). w Unscrew 2 screws, B (2 × 8 mm, black). w Unsolder 1 point, I.

  • Page 56: Section 4 Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS • A-BAND CIRCUIT (1) MF (above 0.15 MHz, below 1.9 MHz) signals 4-1-1 BAND SWITCHING CIRCUIT (RF UNIT) RF signals (0.15–1.9 MHz) from an attenuator (D69) pass The RF signals from the antenna connector pass through through the low-pass filter (L123–L125 and C851–C853), the limiter (D68) and an attenuator* (D69).
  • Page 57 (3) HF-H (above 15 MHz, below 30 MHz) signals (3) 800M (above 470 MHz, below 833 MHz) signals RF signals (15–30 MHz) from an attenuator (D69) pass RF signals (470–833 MHz) from an attenuator (D69) pass through the low-pass filter (L123–L125 and C851–C853), through the high-pass filter (L126, L127 and C854–C858) band switch (D73) and bandpass filter (L81–L84 and and band switch (D11).
  • Page 58 • B-BAND CIRCUIT 4-1-6 3RD MIXER AND DEMODULATOR CIRCUITS The RF signals from the band switch (D32, D36, D143 and (RF UNIT) D147) are amplified at the RF amplifier (IC18, pins 1, 4), and The 3rd mixer circuit converts the 2nd IF signal to a 3rd IF are mixed with 1st LO signals at the 1st mixer circuit (IC15, signal.
  • Page 59 (3) AM MODE (1) FM MODE The 3rd IF signal is output from the FM IF IC (IC2, pin 3), The 3rd IF signal is output from the FM IF IC (IC17, pin 3), and passes through the mode switch (D109) and ceramic and passes through the mode switch (D134) and ceramic bandpass filter (FI2).
  • Page 60 While in WFM/AM modes, AF signals from the demodulator (3) AM MODE circuit (RF unit) bypass the AF filter via the AF filter bypass The 3rd IF signal is output from the FM IF IC (IC17, pin 3), switch (Q27), and are then amplified at the AF amplifier and passes through the mode switch (D134) and ceramic (Q22).
  • Page 61 (1) A-BAND CIRCUIT The A-AGC or B-AGC voltage is used for the the bias volt- A portion of the AF signals from the FM IF IC (RF unit; IC2, age of the IF and RF amplifiers. When receiving strong sig- pin 9) passes through the low-pass filter (LOGIC unit;...

  • Page 62: Pll Circuits

    4-2 PLL CIRCUITS 4-2-2 REFERENCE OSCILLATOR CIRCUIT (RF UNIT) 4-2-1 PLL CIRCUIT The reference oscillator circuit (X1, Q556, D171) generates A PLL circuit provides stable oscillation of the 1st LO fre- a 19.2 MHz reference frequency which is stabilized within quencies.
  • Page 63 A portion of the signal from the buffer amplifier (IC2) is A part of oscillated signal from the 2nd C-VCO circuit is amplified at the buffer amplifier (Q8) and is then fed back to applied to the PLL IC (IC1, pin 8) as the comparison signal, the PLL IC (IC3, pin 11) as the comparison signal.
  • Page 64 • B-BAND CIRCUIT (2NDDVCO BOARD) • B-BAND CIRCUIT The 2nd D-VCO circuit (Q1 and D1) generates 247.0500 The 19.2 MHz reference signal is amplified at the LO ampli- MHz and 286.3500 MHz. The oscillated signal is applied to fier (Q555), and is then applied to the FM IF IC (IC17, pin 2) the 2nd mixer (RF unit;...

  • Page 65: Other Circuits

    4-2-7 BFO CIRCUIT (LOGIC UNIT) The oscillated signal at the BFO VCO circuit (IC6, X2) is applied to the MAIN unit via the J5 (pin 35) as the BFO, and is then amplified at the BFO amplifier (RF unit; Q530). The amplified signal is mixed with 3rd IF signal to demodulate to AF signal on SSB/CW modes.

  • Page 66: Power Supply Circuits

    4-4 POWER SUPPLY CIRCUITS 4-4-3 RF UNIT VOLTAGE LINES 4-4-1 LOGIC UNIT VOLTAGE LINES Description Line Description Receive 3 V line from the LOGIC unit via the J1, Line pin 37. The voltage is supplied to the RF (IC19), The voltage is same as connected battery pack. A_R3V IF (Q5) and LO (Q540) amplifiers, 1st (IC1) and The voltage is supplied to the charge controller...

  • Page 67: Port Allocations

    (LOGIC unit; IC3)–Continued 4-5 PORT ALLOCATIONS 4-5-1 MAIN CPU PORT ALLOCATIONS Port Description number name (LOGIC UNIT; IC3) Outputs strobe signal to the D/A con- STR2 verter IC (IC22, pin 1). Port Description number name 49–52 KS3–KS1 Output key matrix signals. DATAC Outputs data and clock control signal.
  • Page 68 4-5-4 D/A CONVERTER IC PORT ALLOCATIONS 4-5-2 SUB CPU PORT ALLOCATIONS (RF UNIT; IC14) (REC UNIT; IC2) Port Port Description Description number name number name RSTO Input port for the USB reset signal. Outputs VHF band selecting signal at A_VHFC the A-BAND circuit.

  • Page 69: Circuit Description

    4-6-3 CHARGING CONTROL CIRCUIT (MAIN UNIT AND TANSHI BOARD) 4-6-1 DC/DC CONVERTER CIRCUIT (MAIN UNIT) • CHARGING THE BATTERY WITH IC-R20 Input voltage (8–16 V) from the BC-123A/E pass through The “DET2” signal from the TANSHI board is applied to the reverse protection circuit (D6) via the J1.

  • Page 70: Section 5 Adjustment Procedures

    0.1 V to 32 mV 3.5(d) mm ( 127 dBm to 17 dBm) 3-conductor 3.5(d) mm plug must be used. to [SP] jack Power supply to [DC] 6 V / 1 A jack IC-R20 5 - 1...

  • Page 71: Software Adjustments

    • Connect an SSG to the antenna connector and set as • Set an SSG’s level to 10 dB S/N sensitivity (A). SHIFT Frequency : 14.0990 MHz • Measure the AF output level while the IC-R20 [LSB-IFS] Modulation : OFF outputs 1 kHz signal (B).
  • Page 72 • RF UNIT BOTTOM VIEW • RF UNIT TOP VIEW L105 CP18 Center voltage adjustment (B-BAND) Reference frequency check point CP11 Center voltage check point (B-BAND) Center voltage adjustment (A-BAND) Center voltage check point (A-BAND) • BFO CHECK POINT (LOGIC UNIT TOP VIEW) BFO check point 5 - 3...
  • Page 73 SOFTWARE ADJUSTMENTS–Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION • Mode : FM • Push [• LOCK] key. [AFC] • Connect an SSG to the antenna connector and set as Level : 1 mV* (–47 dBm) A-BAND) Frequency : 145.100 MHz Modulation : OFF •...
  • Page 74 SOFTWARE ADJUSTMENTS–Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION S-METER • Mode : FM • Push [8 SET] key. [S-M] • Connect an SSG to the antenna connector and set as (1.81 MHz Level : 0.56 µV* (–112 dBm) FM mode) Frequency : 1.81 MHz Modulation : ±1 kHz Deviation...
  • Page 75 SOFTWARE ADJUSTMENTS–Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION S-METER • Mode : FM • Push [8 SET] key. [S-M] • Connect an SSG to the antenna connector and set as (1400.1 MHz Level : 0.56 µV* (–112 dBm) FM mode) Frequency : 1400.1 MHz Modulation : ±1 kHz Deviation...
  • Page 76 SOFTWARE ADJUSTMENTS–Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION S-METER • Mode : FM • Push [8 SET] key. [S-M] • Connect an SSG to the antenna connector and set as (2510.1 MHz Level : 0.56 µV* (–112 dBm) FM mode) Frequency : 2510.1 MHz Modulation : ±1 kHz Deviation...

  • Page 77: Section 6 Parts List

    SECTION 6 PARTS LIST 6-1 IC-R20 [1STAVCO BOARD] ORDER [1STAVCO BOARD] DESCRIPTION ORDER DESCRIPTION 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 1110005180 S.IC µPC2746TB-E3 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 1130011660 S.IC MB15T61ULPVA-G-ER 7030008300 S.RESISTOR...
  • Page 78 [1STAVCO BOARD] [1STBVCO BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 4030017460 S.CERAMIC ECJ0EB1E102K 7030005210 S.RESISTOR ERJ2GEJ 822 X (8.2 kΩ) ERJ2GEJ 471 X (470 Ω) [EUR], [UK], [USA], [CAN] B 7030005000 S.RESISTOR 6910015520 CONNECTOR IMSA-9230B-1-07Z064-T 7030005290 S.RESISTOR ERJ2GEJ 682 X (6.8 kΩ) ERJ2GEJ 121 X (120 Ω) 6910015510 CONNECTOR IMSA-9230B-1-08Z064-T...
  • Page 79 [1STBVCO BOARD] [2NDCVCO BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 4030017460 S.CERAMIC ECJ0EB1E102K 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) 4030017460 S.CERAMIC ECJ0EB1E102K 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 4030017770 S.CERAMIC ECJ0EB1E332K 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 4550003220 S.TANTALUM TEESVA 1E 105M8L 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ)
  • Page 80 [2NDDVCO BOARD] [DOWNCONV BOARD] ORDER ORDER DESCRIPTION DESCRIPTION ERJ2GEJ 101 X (100 Ω) 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 7030004980 S.RESISTOR 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) except [EUR], [UK] T ERJ2GEJ 331 X (330 Ω) ERJ2GEJ 181 X (180 Ω) [EUR], [UK] T 7030007280 S.RESISTOR 7030009160 S.RESISTOR ERJ2GEJ 471 X (470 Ω)
  • Page 81 [DOWNCONV BOARD] [REC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030017730 S.CERAMIC ECJ0EB1E471K 4030016790 S.CERAMIC ECJ0EB1C103K 4030017730 S.CERAMIC ECJ0EB1E471K 4030016790 S.CERAMIC ECJ0EB1C103K 4030017730 S.CERAMIC ECJ0EB1E471K 4030017400 S.CERAMIC ECJ0EC1H220J 4030016790 S.CERAMIC ECJ0EB1C103K 4030017400 S.CERAMIC ECJ0EC1H220J 4030017420 S.CERAMIC ECJ0EC1H470J 4030016790 S.CERAMIC ECJ0EB1C103K 4030017420 S.CERAMIC ECJ0EC1H470J 4030017490 S.CERAMIC C1608 JB 1A 105K-T...
  • Page 82 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1530003630 S.TRANSISTOR 2SC4617 TLS 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 1590003290 S.TRANSISTOR UNR9213J-(TX) 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) 1520000650 S.TRANSISTOR 2SB1201-S-TL 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) 1590002950 S.FET HAT1023R-EL 7410001130 S.ARRAY EXB28V102JX...
  • Page 83 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ2GEJ 471 X (470 Ω) R127 7030005170 S.RESISTOR ERJ2GEJ 474 X (470 kΩ) R211 7030005000 S.RESISTOR ERJ2GEJ 471 X (470 Ω) R128 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ) R212 7030005000 S.RESISTOR R129 7030008300 S.RESISTOR ERJ2GEJ 184 X (180 kΩ)
  • Page 84 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030017460 S.CERAMIC ECJ0EB1E102K C161 4030017720 S.CERAMIC ECJ0EB1H331K 4030017490 S.CERAMIC C1608 JB 1A 105K-T C162 4030011600 S.CERAMIC C1608 JB 1E 104K-T 4030017490 S.CERAMIC C1608 JB 1A 105K-T C163 4030017720 S.CERAMIC ECJ0EB1H331K 4550006700 S.TANTALUM ECST1AY106R C164 4030017720 S.CERAMIC...
  • Page 85 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1110005230 S.IC µPC2757TB-E3 1790001240 S.DIODE MA2S728-(TX) 1110003200 S.IC TA31136FN (EL) 1790001260 S.DIODE MA2S077-(TX) IC10 1110005230 S.IC µPC2757TB-E3 1790001260 S.DIODE MA2S077-(TX) IC12 1130011770 S.IC CD4066BPWR 1790001260 S.DIODE MA2S077-(TX) IC14 1110006360 S.IC M62366GP D60J 1790001260 S.DIODE MA2S077-(TX) IC15...
  • Page 86 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 2040001200 S.SAW EFCH266MKQP1 7030005240 S.RESISTOR ERJ2GEJ 473 X (47 kΩ) 2020001270 CERAMIC CFWLB450KE2A-B0 (CFWM450E) 7030007340 S.RESISTOR ERJ2GEJ 153 X (15 kΩ) 2010002280 S.MONOLITH FL-293 (19.650 MHz) 7030005070 S.RESISTOR ERJ2GEJ 683 X (68 kΩ) 2040001190 S.SAW EFCH429MKQP1 7030005240 S.RESISTOR...
  • Page 87 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R245 7030005220 S.RESISTOR ERJ2GEJ 223 X (22 kΩ) R445 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) R246 7030005110 S.RESISTOR ERJ2GEJ 224 X (220 kΩ) R446 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) ERJ2GEJ 2R7 X (2.7 Ω) ERJ2GEJ 221 X (220 Ω) R247...
  • Page 88 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ2GEJ 150 X (15 Ω) R539 7030005300 S.RESISTOR C239 4030016790 S.CERAMIC ECJ0EB1C103K ERJ2GEJ 150 X (15 Ω) R540 7030005300 S.RESISTOR C241 4030011810 S.CERAMIC C1608 JB 1A 224K-T ERJ2GEJ 151 X (150 Ω) R541 7030007270 S.RESISTOR C242...
  • Page 89 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C674 4030017420 S.CERAMIC ECJ0EC1H470J C788 4030016790 S.CERAMIC ECJ0EB1C103K C676 4030017400 S.CERAMIC ECJ0EC1H220J C789 4030017460 S.CERAMIC ECJ0EB1E102K C677 4030017350 S.CERAMIC ECJ0EC1H020B C790 4030016790 S.CERAMIC ECJ0EB1C103K C678 4030017460 S.CERAMIC ECJ0EB1E102K C791 4550006200 S.TANTALUM ECST0JY106R C679 4030017460 S.CERAMIC ECJ0EB1E102K...
  • Page 90 [RF UNIT] 6-2 BC-156 ORDER [TANSHI BOARD] DESCRIPTION ORDER DESCRIPTION C894 4030016790 S.CERAMIC ECJ0EB1C103K C895 4030017730 S.CERAMIC ECJ0EB1E471K 1710000050 DIODE 1SS53 C896 4030016790 S.CERAMIC ECJ0EB1C103K C897 4030017460 S.CERAMIC ECJ0EB1E102K C898 4030017460 S.CERAMIC ECJ0EB1E102K 7100000820 RESISTOR 2SG 0.15 C899 4030017460 S.CERAMIC ECJ0EB1E102K 7510000530 THERMISTOR ERT-D2FHL 103S...
  • Page 91 [MAIN UNIT] ORDER DESCRIPTION 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4510004590 ELECTROLYTIC 16 MV 470 HC 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4550000540 S.TANTALUM TEESVA 1V 154M8L 4030011600 S.CERAMIC C1608 JB 1E 104K-T 4030011600 S.CERAMIC C1608 JB 1E 104K-T...
  • Page 92 SECTION 7 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY MECHANICAL PARTS AND DISASSEMBLY [2NDDVCO BOARD] [CHASSIS PARTS] REF. NO. ORDER NO. QTY. DESCRIPTION REF. NO. ORDER NO. QTY. DESCRIPTION 6510024470 Connector BNC-R168 8510016230 2699 C-VCO case 8900009640 Cable OPC-963 [DOWNCONV BOARD] 8210020700 2699 front panel assembly REF.
  • Page 93 DOWNCONV BOARD MP2 (D) MP1 (D) 34.8 1STBVCO BOARD MP26 (C) 1STAVCO MP7 (C) BOARD MP1 (1B) MP19 (C) MP27 (C) MP1 (1A) S25 (L) S24 (L) EP1 (R) MP1 (2D) MP35 (C) N I T MP1 (RE) DS12 (L) J1 (C) 32.9 MP1 (R)

  • Page 94: Section 8 Semi-Conductor Information

    SECTION 8 SEMI-CONDUCTOR INFORMATION • • TRANSISTOR AND FET’S DIODES IC-R20 IC-R20 2SA1362-GR 2SA1586-GR 2SA1588 GR 2SB1132 R 2SB1201-S-TL 1SS372 1SV172 1SV245 1SV308 1SV314 (Symbol: AEG) (Symbol: SG) (Symbol: ZG) (Symbol: BAR) (Symbol: B1201) (Symbol: N9) (Symbol: BE) (Symbol: T3)

  • Page 95: Section 9 Board Layouts

    The combination of this page and the next page shows SECTION 9 BOARD LAYOUTS the unit layout in the same configuration as the actual P.C. Board. 9-1 RF UNIT • TOP VIEW to LOGIC UNIT J5 B_DET B_R3V B_NOISE B_VCO2 B_RSSI B_VCO3 B_VCO4...

  • Page 96: Rf Unit

    The combination of this page and the previous page shows the unit layout in the same configuration as the to 1STBVCO BOARD J2 to 1STBVCO BOARD J1 actual P.C. Board. to 2NDDVCO BOARD J1 to 2NDDVCO BOARD J2 B_R3V B_VCO1 RF UNIT B_VCO2 PLLBSTB...
  • Page 97 The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. 9-2 LOGIC UNIT • TOP VIEW to RF UNIT J1 B_DET B_R3V B_NOISE to REC UNIT J6 B_VCO2 B_RSSI AOUT B_VCO3...

  • Page 98: Logic Unit

    The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board. LOGIC UNIT • BOTTOM VIEW AFOUT – 9 - 4...
  • Page 99 The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. 9-3 REC UNIT to LOGIC UNIT HJ8 • TOP VIEW AOUT B_AIN VL DOWN VL UP A_ATN SUB_3C VOL_UP_DOWN CPU_TX CPU_RX...

  • Page 100: Rec Unit

    The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board. REC UNIT • BOTTOM VIEW 9 - 6...
  • Page 101 9-4 1STAVCO BOARD 9-6 2NDCVCO BOARD The combination of this page and the next page shows • TOP VIEW • TOP VIEW the unit layout in the same configuration as the actual P.C. Board. to RF UNIT HJ5 9-8 DOWNCONV BOARD •...
  • Page 102 2NDCVCO BOARD 1STAVCO BOARD The combination of this page and the previous page shows the unit layout in the same configuration as the • BOTTOM VIEW • BOTTOM VIEW actual P.C. Board. to RF UNIT HJ11 DOWNCONV BOARD • BOTTOM VIEW to RF UNIT HJ3 PLLCK A_VCO_OUT...

  • Page 103: 1Stavco Board

    SECTION 10 BLOCK DIAGRAM ANTENNA B_DET B_R3V B_R3V 266.7 MHz B_R3V B MODEC 19.65 MHz B MODEC B_R3V B_R3V B MODEC 0.450 MHz B MODEC 0.1500 – 3304.9999 MHz Explanatory notes RF UNIT A_DET EFCH266MKQP1 Q542 IC17: TA31136FN MIXER MIXER FL-293 CFWM450E VOLTAGE LINE...
  • Page 104 B_DET B_DET A_DET A_DET X2: CSBF453K LCD DRIVE IC6: SN74AHC1CU04DBVR X2: CSBFB453K Q11: UNR9113J D18: HN2V02H BFOC D22–25: 1SS372 Q28: 2SC4617 IC11: TC7W04FU DC-DC REG MAIN CPU IC3: M30620 B_CTONE B_DET IC12: LM2904PWR B_RTONE B_DET TONE FIL CPU3V IC13: LM2904PWR CLOCK SHIFT A_RTONE A_DET...

  • Page 105: Voltage Diagram

    433 MHz 3.0V SECTION 11 VOLTAGE DIAGRAM B_R3V B_R3V Explanatory notes IC15 µPC2757TB VOLTAGE LINE IC16 µPC2757TB RX LINE IFO16 11-1 RF UNIT FI1 EFCH266MKQP1 C436 1 RFI 2 GND C746 C748 3 LO B_R3V 3.5p 0.001 R423 C750 0.001 A_R3V C749 47nH...
  • Page 106 B_R3V B_R3V B_R3V AM/NFM CONT AM/NFM CONT B_R3V B_R3V B_R3V AM/NFM_CONT C779 C780 C885 C757 R445 R446 Q553 B_R3V R430 0.01 0.001 C882 C775 C776 433 MHz R425 R435 CFWM450E XP1113 FI7 FL-293 0.001 L104 0.22 3.0V R521 L102 PLLDSTB 19.650 MHz R426 3.3µH...

  • Page 107: Logic Unit

    11-2 LOGIC UNIT 23 25 LCD_CS LCD_RESET LCD_RS 3.1V DATA DATA C66 1 SN74AHC1GU04DBVR C67 1 BFO_SHIFT to_LCD C71 1 DS12 C72 1 XP4601 M3-0243TIY CW/BFO_ON B_TCON 2.8V C184 1 2SA1588 PCON C75 1 C76 1 C78 1 R201 0.01 C188 C79 1 BFOC...

  • Page 108: Rec Unit

    11-3 REC UNIT X2 CR-708 16.384 MHz 0.01 0.01 I/O7 I/O6 DVDD I/O5 I/O4 CBUSY CBUSY RESET DVDD ML2302TB RESET FIFOST TEST2 FIFOST TEST3 DGND TEST4 TEST5 P12/D10 TEST6 P42/A18 I/O3 P11/D9 P43/A19 I/O2 TEST7 SPVDD P10/D8 P44/CS0 I/O1 TEST8 AVDD P07/D7 P45/CS1...

  • Page 109: 1Stavco Board

    11-4 1STAVCO BOARD 11-5 1STBVCO BOARD PLLBSTB R57 JPW [SEA], [EXP] only R57 1k R57 JPW [SEA], [EXP] 0.01 PLLDATA RF unit R57 1k 0.001 R56 JPW [SEA], [EXP] PLLCK R56 1k 3.0V PLLASTB R56 JPW [SEA], [EXP] only R56 1k R55 JPW [SEA], [EXP] PLLDATA R55 1k...

  • Page 110: 2Ndcvco Board

    11-6 2NDCVCO BOARD 3.0V 2.4V 2SC4617 A _ R3V A _ R3V 1CVCO RF unit C _ VCO _ OUT 33nH 0.001 2.3V 0.001 C _ VCO _ OUT 0.001 22nH 0.22µH 18nH 1SV314 FH102 1.7V 0.33 PLLCSTB PLLCSTB PLLCSTB PLLDATA PLLDATA PLLDATA...

  • Page 111: Downconv Board

    11-8 DOWNCONV BOARD 2.8V RF _ IN RF _ IN RF _ IN 2.2V 0.01 RF _ IN 470p 0.01 0.01 180k PLLCK PLLCK PLLDATA PLLDATA RF unit 2SC5277 PLLESTB PLLESTB 0.7V HJ10 MB15E03SL 0.01 IF _ OUT OSCI OSCO 2.8V 2.3V XFIN...

  • Page 112: Disassembly Information

    SECTION 12 BC-156 DESKTOP CHAGER INFORMATION 12-1 DISASSEMBLY INFORMATION MP3 (C) [CHASSIS PARTS] REF. NO. ORDER NO. QTY. DESCRIPTION 8930062600 2708 holder 8110007620 2505 cover 8810009990 Screw PH BT M3 X 8 ZK MP1 (C) 8930039620 Stand/leg cushion (A) 8930051010 2308 terminal holder 8930051020 2308 A-terminal Y490 8930051030 2308 B-terminal 8010019600 2505 case (D)

  • Page 113: Voltage Diagram

    12-3 BC-156 VOLTAGE DIAGRAM • MAIN UNIT 3.0 Vp-p CHG ON 1.77 ms CHG OFF 0.6V 5.4V 5.2V 13.5V (EXT DC) SB20-03P 2SJ377 S-N5051 S-N5051 0.15 (1W) EXT. L1 HK- DC IN 08S050-2010 FGB 2A 2SB1184 13.5V 0.001 0.001 0.001 DTA114EE 0.22 0.22...

  • Page 114: Board Layouts

    12-4 BC-156 BOARD LAYOUTS • MAIN UNIT (TOP VIEW) CHGOUT CHGOUT DET2 BATT– DET1 BATT+ CONT to TANSHI BOARD J1 • TANSHI BOARD (TOP VIEW) CONT BATT+ DET1 BATT– DET2 CHGOUT CHGOUT to BC-156 MAIN UNIT J4 12 - 3...
  • Page 115 • MAIN UNIT (BOTTOM VIEW) 12 - 4...
  • Page 116 Highway 17 Delta, B.C., V4K 5B8, Canada : http://www.icomspain.com Phone : +1 (604) 952-4266 Fax : +1 (604) 952-0090 E-mail : icom@icomspain.com : http://www.icomcanada.com E-mail : info@icomcanada.com Blacksole House, The Boulevard, Altira Business Park, Herne Bay, CT6 6GZ, UK Phone : +44 (01227) 741741...
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