Icom IC-R20 Service Manual Download Page 104

Page: 104 / 117

10 - 2

RESET

EEPROM

X1: CR-717

PRE
AMP

AF
AMP

REG

LPF

REG

X2: CR-708

X1: CR-672

X2: CSBF453K

IC3: M30620

LCD DRIVE

BFOC

DC-DC REG

CIV-INTERFACE

LIGHT

IC2: BD5228G

IC1: CAT24WC256

CPU3V

IC2:
M30620

SUBCPU

MEMORY

USB INTERFACE

IC6:
K9F5608U0C-YCB0

AF IN/OUT

D0-D7

IC7: ML2302TB

REC IC

IC3: FT245BM

TONE FIL

AF FIL/AMP

CLOCK SHIFT

BFO

INT/KEY
MATRIX

A DIAL

B DIAL

D14: HVC376B

IC4: TC7W04FU

Q3 : 2SA1586

Q6 : 2SC4116

D2 : MA2S728
D3 : 1SS400
D5 : MA2S728
D6 : 1SS400
D7 : 1SS400
D8 : MA2S728
D9 : 1SS400
D10: 1SS400
D11: MA2S728
D12: 1SS400

B_CTONE

B_RTONE

A_RTONE

A_CTONE

IC12: LM2904PWR

IC13: LM2904PWR

Q23: 2SC4617
Q25: XP6501
Q26: 2SJ144

Q22: 2SC4617
Q24: XP6501
Q27: 2SJ144

Q19: 2SJ144

B AMUTE

IC7: SM6451B

Q12: 2SC4617

Q16: 2SC4617

IC5: TA31056F
Q7 : XP1501
Q8 : 2SA1588
Q9 : 2SB1132

ROUT

EXTSP

INTSP

A_DET

B_DET

Li+

EXTDC

CHGC

CHGS

+3S

CPU3

+3V

A_R3

B_R3

Q13: XP6501
Q14: 2SA1588

IC8: RN111N321B

Q17: 2SA1588

Q10: 2SA1362

Q15: 2SA1362

BFO

B_DET

A_DET

B_DET

A_DET

B_DET

Q30: 2SB1201
Q31: HAT1023R
Q32: 2SC4617
Q33: 2SB1132
Q34: UNR9215J
Q35: UNR9213J

CHARGE CONTROL

LOUT

BACKLIGHT CONTROL

Q1 : 2SC4617
Q4 : 2SC4617
Q5 : 2SC4617
Q36: 2SC4617
DS1–DS11: SML-512MW
EP12: CV1081

IC6: SN74AHC1CU04DBVR
X2: CSBFB453K
Q11: UNR9113J
D18: HN2V02H

D22–25: 1SS372
Q28: 2SC4617
IC11: TC7W04FU

IC9: RN111N321B

D28: MA2S111
D29: SB07-03C
D34: SB07-03C
D35: MA2S728
D36: MA133

USB

6.000 MHz

9.8304 MHz

16.384 MHz

MAIN CPU

REC UNIT

LOGIC UNIT

Explanatory notes

VOLTAGE LINE

RX LINE

RECORDING LINE

PLAYBACK LINE

Summary of Contents for IC-R20

Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 UNIT LAYOUTS 14 VOLTAGE DIAGRAM 16 Jan 2010...

Page 2: ...DIO 1SV308 TPL3 F B 75 3 15 5 D75 1790001621 S DIO 1SV308 TPL3 F T 73 5 5 9 D76 1790001261 S DIO MA2S077G0L B 61 7 10 5 REF PARTS DESCRIPTION M H V NO NO LOCATION RF UNIT M Mounted side T Mounted on t...

Page 3: ...B 17 8 24 9 R179 7030005100 S RES ERJ2GEJ 154 X 150K B 14 4 22 8 R203 7030004980 S RES ERJ2GEJ 101 X 100 T 26 9 11 4 R204 7030005120 S RES ERJ2GEJ 102 X 1K T 26 6 6 2 R205 7030005050 S RES ERJ2GEJ 10...

Page 4: ...6 4030017460 S CER ECJ0EB1E102K B 58 1 21 7 C18 4030016790 S CER ECJ0EB1C103K T 27 6 6 3 C22 4030017590 S CER ECJ0EC1H070C T 69 1 29 6 C23 4030017380 S CER ECJ0EC1H050B T 69 1 28 6 C27 4030017460 S CE...

Page 5: ...42 9 C770 4030016790 S CER ECJ0EB1C103K T 3 9 40 6 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount REF PARTS DESCRIPTION M H V NO NO LOCATION RF UNIT C771 403001...

Page 6: ...7 4 1 8 R3 7030005040 S RES ERJ2GEJ 472 X 4 7K T 14 6 4 2 R4 7030005210 S RES ERJ2GEJ 822 X 8 2K T 15 2 2 2 R5 7030004990 S RES ERJ2GEJ 221 X 220 T 20 1 4 9 R6 7030004970 S RES ERJ2GEJ 470 X 47 T 17 6...

Page 7: ...9 4 Q11 1590001810 S TRA XP1113 TX B 20 6 6 6 Q12 1530003592 S TRA 2SC5277A 2 TL E B 3 6 15 7 D1 1720000401 S VAR 1SV245 TPH3 F T 5 2 2 7 D2 1720000401 S VAR 1SV245 TPH3 F T 7 4 5 D3 1750001051 S VAR...

Page 8: ...7460 S CER ECJ0EB1E102K T 5 7 12 1 C19 4030017600 S CER ECJ0EC1H080C T 15 5 12 7 C20 4030017570 S CER ECJ0EC1H040B T 15 3 10 9 C21 4030017460 S CER ECJ0EB1E102K T 11 5 11 7 C22 4030016930 S CER ECJ0EB...

Page 9: ...J1 6910010841 CON IMSA 9230B 1 05Z057 PT1 J2 6910014431 CON IMSA 9230B 1 06Z057 PT1 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount REF PARTS DESCRIPTION M H V NO...

Page 10: ...J 102 X 1K T 4 8 13 6 R27 7030005040 S RES ERJ2GEJ 472 X 4 7K T 9 8 12 3 R28 7030005530 S RES ERJ2GEJ 100 X 10 T 8 1 12 R29 7030005120 S RES ERJ2GEJ 102 X 1K B 3 6 3 2 R30 7030008300 S RES ERJ2GEJ 184...

Page 11: ...L T 7 3 32 4 D37 1750001830 S VAR SVC389 TL E B 95 1 48 8 X1 6050011310 S XTA CR 717 SX 1302 9 8304 MHz B 62 6 6 5 X2 6060000820 S CER CSBFB453KJ58 R1 B 105 8 44 5 L1 6200003640 S COI MLF1608E 100K T...

Page 12: ...4 X 100K B 99 3 33 7 R209 7030005090 S RES ERJ2GEJ 104 X 100K B 70 8 13 5 R210 7030005090 S RES ERJ2GEJ 104 X 100K B 42 4 40 5 R211 7030005000 S RES ERJ2GEJ 471 X 470 B 80 7 6 4 R212 7030005000 S RES...

Page 13: ...K B 77 9 29 1 C165 4030017760 S CER ECJ0EB1H222K B 87 2 37 1 C166 4030018080 S CER ECJ0EB1H182K B 89 2 32 1 C167 4030017760 S CER ECJ0EB1H222K B 87 1 24 5 C168 4030018080 S CER ECJ0EB1H182K B 89 1 18...

Page 14: ...9 5 30 9 C1 4030016790 S CER ECJ0EB1C103K T 32 10 5 C2 4550006050 S TAN TEESVA 0J 106M8R T 15 14 8 C3 4030016790 S CER ECJ0EB1C103K T 11 7 17 7 C4 4030016790 S CER ECJ0EB1C103K T 17 3 17 7 C5 4030016...

Page 15: ...12 D26 D27 D28 D29 D30 D31 D34 D35 D36 DS1 3 S D 2 S D DS4 6 S D 5 S D DS7 DS8 DS9 DS11 EP1 EP2 EP3 EP4 EP7 EP9 EP10 EP12 J8 Q1 Q4 Q30 Q31 Q32 Q33 Q34 Q35 Q36 R12 R14 R19 R23 R29 R32 R38 R49 R53 R55 R...

Page 16: ...C171 C172 C174 C179 C181 C184 C186 C187 C188 C189 C190 C191 C192 C193 C194 D2 D5 D8 D7 D10 D11 D13 D14 D18 D20 D21 D22 D23 D24 D25 D32 D33 D37 EP6 EP8 EP13 IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC11 IC...

Page 17: ...C868 0 001 R335 100k C673 0 001 C676 22p D169 MA2S7280G D170 MA2S7280G C872 0 1 CP3 ANTENNA 0 1500 3304 9999 MHz IC1 PC2757TB 1 RFI 2 GND 3 LO 4 PS 5 VCC 6 IFO FI1 EFCH266MKQP1 I IC10 PC2757TB 1 RFI 2...

Page 18: ...3 3 9k C707 0 001 C710 0 001 D114 MA2S7280G R30 3 3k R179 150k R394 27k R393 22k C717 0 1 C720 0 01 C890 0 1 R462 3 9k C794 0 001 C797 0 001 D139 MA2S7280G R451 3 3k R453 150k C790 0 01 Q5 2SC5006 Q54...

Page 19: ...82 47k R76 47k R67 1k R83 47k R43 15k IC4 TC7W04FU F 1 2 3 4 5 6 7 8 R40 10k R34 10k R41 12k R15 100k D13 1SS400 Q3 2SA1586 GR F Q6 2SC4116 GR F R20 100k R39 10k D31 1SS400 D30 1SS400 D26 1SS400 D27 1...

Page 20: ...S PARTS LIST 1 BOARD LAYOUTS 14 VOLTAGE DIAGRAM 22 Aug 2009 VERSION LIST Model Version Battery pack AC adapter IC R20 EUR BP 206 BC 149D UK USA BC 153SA FRA BC 149D SEA EXP 01 BP 206 BC 149A EXP 02 BC...

Page 21: ...IO 1SV308 TPL3 F B 75 3 15 5 D75 1790001621 S DIO 1SV308 TPL3 F T 73 5 5 9 D76 1790001261 S DIO MA2S077G0L B 61 7 10 5 REF PARTS DESCRIPTION M H V NO NO LOCATION RF UNIT M Mounted side T Mounted on th...

Page 22: ...B 17 8 24 9 R179 7030005100 S RES ERJ2GEJ 154 X 150K B 14 4 22 8 R203 7030004980 S RES ERJ2GEJ 101 X 100 T 26 9 11 4 R204 7030005120 S RES ERJ2GEJ 102 X 1K T 26 6 6 2 R205 7030005050 S RES ERJ2GEJ 10...

Page 23: ...6 4030017460 S CER ECJ0EB1E102K B 58 1 21 7 C18 4030016790 S CER ECJ0EB1C103K T 27 6 6 3 C22 4030017590 S CER ECJ0EC1H070C T 69 1 29 6 C23 4030017380 S CER ECJ0EC1H050B T 69 1 28 6 C27 4030017460 S CE...

Page 24: ...42 9 C770 4030016790 S CER ECJ0EB1C103K T 3 9 40 6 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount REF PARTS DESCRIPTION M H V NO NO LOCATION RF UNIT C771 403001...

Page 25: ...17 4 1 8 R3 7030005040 S RES ERJ2GEJ 472 X 4 7K T 14 6 4 2 R4 7030005210 S RES ERJ2GEJ 822 X 8 2K T 15 2 2 2 R5 7030004990 S RES ERJ2GEJ 221 X 220 T 20 1 4 9 R6 7030004970 S RES ERJ2GEJ 470 X 47 T 17...

Page 26: ...9 4 Q11 1590001810 S TRA XP1113 TX B 20 6 6 6 Q12 1530003592 S TRA 2SC5277A 2 TL E B 3 6 15 7 D1 1720000401 S VAR 1SV245 TPH3 F T 5 2 2 7 D2 1720000401 S VAR 1SV245 TPH3 F T 7 4 5 D3 1750001051 S VAR...

Page 27: ...7460 S CER ECJ0EB1E102K T 5 7 12 1 C19 4030017600 S CER ECJ0EC1H080C T 15 5 12 7 C20 4030017570 S CER ECJ0EC1H040B T 15 3 10 9 C21 4030017460 S CER ECJ0EB1E102K T 11 5 11 7 C22 4030016930 S CER ECJ0EB...

Page 28: ...J1 6910010841 CON IMSA 9230B 1 05Z057 PT1 J2 6910014431 CON IMSA 9230B 1 06Z057 PT1 M Mounted side T Mounted on the Top side B Mounted on the Bottom side S Surface mount REF PARTS DESCRIPTION M H V NO...

Page 29: ...120 S RES ERJ2GEJ 102 X 1K R26 7030005120 S RES ERJ2GEJ 102 X 1K R27 7030005040 S RES ERJ2GEJ 472 X 4 7K R28 7030005530 S RES ERJ2GEJ 100 X 10 R29 7030005120 S RES ERJ2GEJ 102 X 1K R30 7030008300 S RE...

Page 30: ...L T 7 3 32 4 X1 6050011310 S XTA CR 717 SX 1302 9 8304 MHz B 62 6 6 5 X2 6060000820 S CER CSBFB453KJ58 R1 B 105 8 44 5 L1 6200003640 S COI MLF1608E 100K T B 16 5 5 9 R1 7410001110 S ARR EXB28V332JX B...

Page 31: ...J 104 X 100K B 70 8 13 5 R210 7030005090 S RES ERJ2GEJ 104 X 100K B 42 4 40 5 R211 7030005000 S RES ERJ2GEJ 471 X 470 B 80 7 6 4 R212 7030005000 S RES ERJ2GEJ 471 X 470 B 80 7 7 4 R213 7030010040 S RE...

Page 32: ...17760 S CER ECJ0EB1H222K B 87 2 37 1 C166 4030018080 S CER ECJ0EB1H182K B 89 2 32 1 C167 4030017760 S CER ECJ0EB1H222K B 87 1 24 5 C168 4030018080 S CER ECJ0EB1H182K B 89 1 18 5 C169 4030016790 S CER...

Page 33: ...9 5 30 9 C1 4030016790 S CER ECJ0EB1C103K T 32 10 5 C2 4550006050 S TAN TEESVA 0J 106M8R T 15 14 8 C3 4030016790 S CER ECJ0EB1C103K T 11 7 17 7 C4 4030016790 S CER ECJ0EB1C103K T 17 3 17 7 C5 4030016...

Page 34: ...12 D26 D27 D28 D29 D30 D31 D34 D35 D36 DS1 3 S D 2 S D DS4 6 S D 5 S D DS7 DS8 DS9 DS11 EP1 EP2 EP3 EP4 EP7 EP9 EP10 EP12 J8 Q1 Q4 Q30 Q31 Q32 Q33 Q34 Q35 Q36 R12 R14 R19 R23 R29 R32 R38 R49 R53 R55 R...

Page 35: ...171 C172 C174 C179 C181 C184 C186 C187 C188 C189 C190 C191 C192 C193 C194 D2 D5 D8 D11 D7 D10 D13 D14 D18 D20 D21 D22 D23 D24 D25 D32 D33 EP6 EP8 IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC11 IC12 IC13 IC1...

Page 36: ...08 C913 C914 C916 C917 C920 C922 D3 D4 D5 D11 D13 D29 D32 D34 D36 D58 D59 D60 D61 D75 D101 D108 D109 D110 D111 D112 D113 D115 D116 D130 D131 D132 D133 D134 D135 D136 D137 D141 D142 D143 D150 D151 D153...

Page 37: ...57 D64 D65 D66 D67 D68 D69 D70 D72 D73 D74 D76 D100 D106 D107 D114 D117 D119 D121 D138 D139 D145 D146 D147 D148 D149 D152 D161 D162 D163 D164 D166 D169 D170 FI2 FI6 FI8 IC12 IC22 L1 L21 L28 L70 L81 L8...

Page 38: ...UB_3C VOL_UP_DOWN VBUS D D N C GND SQL CPU_TX CPU_RX C1 C2 4 C 3 C C5 C8 C9 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 EP1 EP3 EP4 IC1 IC3 IC7 IC8 IC9 IC10 J2 J6 J7 R1 R6 R7 R8 R9 R11 R13 R15 R16 R17...

Page 39: ...side and bottom side of this C6 C7 C10 C11 C12 C13 C14 C15 C27 C28 IC2 IC4 IC5 IC6 Q1 Q2 R10 R12 R20 B6084E H0 H5 H10 H15 H20 H25 H30 H35 H40 H45 H50 H55 H60 H65 H70 H75 V0 V5 V10 V15 V20 V25 V30 V35...

Page 40: ...5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C45 C54 C55 C56 C57 D1 D2 D3 D4 D5 D7 D8 D9 D10 L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 Q1 Q2 Q...

Page 41: ...3 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 R51 R52 R53 R55 R56 R57 H0 H5 H10 H15 H20 V0 V5 V10 V15 C31 C35 C37 C38 C39 C40 C41 C42 C43 C44 C46 C4...

Page 42: ...2S7280G C868 0 001 R335 100k C673 0 001 C676 22p D169 MA2S7280G D170 MA2S7280G C872 0 1 CP3 ANTENNA 0 1500 3304 9999 MHz IC1 PC2757TB 1 RFI 2 GND 3 LO 4 PS 5 VCC 6 IFO FI1 EFCH266MKQP1 I IC10 PC2757TB...

Page 43: ...3 3 9k C707 0 001 C710 0 001 D114 MA2S7280G R30 3 3k R179 150k R394 27k R393 22k C717 0 1 C720 0 01 C890 0 1 R462 3 9k C794 0 001 C797 0 001 D139 MA2S7280G R451 3 3k R453 150k C790 0 01 Q5 2SC5006 Q54...

Page 44: ...01 R82 47k R76 47k R67 1k R83 47k R43 15k IC4 TC7W04FU F 1 2 3 4 5 6 7 8 R40 10k R34 10k R41 12k R15 100k D13 1SS400 Q3 2SA1586 GR F Q6 2SC4116 GR F R20 100k R39 10k D31 1SS400 D30 1SS400 D26 1SS400...

Page 45: ...0 D1 D2 D3 D4 D5 D6 D7 D4 D3 D2 D1 D0 D7 D6 D5 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 NC NC NC NC I O0 I O1 I O2 I O3 NC NC NC VSS VCC NC NC NC I O4 I O5 I O6 I O7 NC...

Page 46: ...3 0V 3 0V 2 0V 1 13V 3 0V Q4 2SC5006 Q5 2SC5006 Q3 2SC5006 IC2 PC2746TB Q9 2SC5231A 8 E Q2 2SC5006 Q1 2SC5006 Q7 2SC4117 BL F Q6 2SK880 GR F Q12 2SC5277 D2 E IC3 MB15T61UL Q8 2SC5231A 8 E Q10 XP1113 Q...

Page 47: ...6 C25 0 001 C26 0 1 C18 47p C19 47p C20 47p R11 1k R12 1k R13 1k C27 0 001 R14 10 R15 820 C21 4 7 R22 330 to RF unit HJ9 to RF unit HJ8 Explanatory notes VOLTAGE LINE 2 4V 3 0V 2 3V 1 7V 0 7V 3 0V 2 3...

Page 48: ...COMMUNICATIONS RECEIVER iC r20 SERVICE MANUAL...

Page 49: ...in snow or any liquids DO NOT reverse the polarities of the power supply when connecting the receiver DO NOT apply an RF signal of more than 20 dBm 100 mW to the antenna connector This could damage th...

Page 50: ...SEMI CONDUCTOR INFORMATION SECTION 9 BOARD LAYOUTS 9 1 RF UNIT 9 1 9 2 LOGIC UNIT 9 3 9 3 REC UNIT 9 5 9 4 1STAVCO BOARD 9 7 9 5 1STBVCO BOARD 9 7 9 6 2NDCVCO BOARD 9 7 9 7 2NDDVCO BOARD 9 7 9 8 DOWN...

Page 51: ...Sensitivity Single mode receiving Except spurious point Unit V FM and WFM is measured at 12 dB SINAD AM SSB and CW are measured at 10 dB S N Squelch Sensitivity except spurious points Selectivity SSB...

Page 52: ...s Reserve charging Protect function FUNCTION BP 206 CONDITION BC 156 ACTION LED CONDITION Over discharge Becomes 1 5 V Charging stop Blinking orange Over charge Becomes 4 5 V Charging stop Blinking or...

Page 53: ...293 A BAND 2nd mixer IC10 PC2757TB A BAND 1st IF filter 429 1 MHz FI4 EFCH429MKQP4 A BAND 1st mixer IC1 PC2757 TB A BAND RF amplifier IC19 PC2757 TB 30 300 MHz RF amplifier Q36 2SC5006 A UHF RF ampli...

Page 54: ...501 Q27 2SJ144 Q22 2SC4617 IC7 SM6451B A BAND AF circuit Q25 XP6501 Q26 2SJ144 Q23 2SC4617 IC7 SM6451B 3V reg Q17 2SA1588 Battery daging regulators Q30 2SB1201 Q32 2SC4617 Q33 2SB1132 LCD DS12 M3 0243...

Page 55: ...OVING THE RF UNIT q Unscrew 3 flat head screws J 2 4 mm silver w Unsolder 2 points K e Remove the RF unit in the direction of the arrow Front panel Rear panel LOGIC unit Speaker W1 J8 A B H I REC unit...

Page 56: ...d switch D72 2 HF L above 1 9 MHz below 15 MHz signals RF signals 1 9 15 MHz from an attenuator D69 pass through the low pass filter L123 L125 and C851 C853 band switch D65 and bandpass filter L85 L87...

Page 57: ...ndpass filter D141 D142 L113 C814 and C816 The signals are applied to the next band switch D143 3 800M above 470 MHz below 833 MHz signals RF signals 470 833 MHz from an attenuator D69 pass through th...

Page 58: ...odulator circuit converts the 3rd IF signal into AF signals A BAND CIRCUIT The 19 65 MHz 2nd IF signal from the 2nd IF amplifier Q5 is applied to the 3rd mixer section of the FM IF IC IC2 pin 16 and i...

Page 59: ...ter FI8 The filtered signal passes through the mode switch D136 and is then fed back and amplified at the limiter amplifier section pin 5 The signal is demodulat ed AF signals at the quadrature detect...

Page 60: ...ctronics volume IC7 pin 11 to control volume level after passing through the mute switch Q19 The signals output from pin 12 and are applied to the pre amplifier Q16 The signals are amplified at the AF...

Page 61: ...ifiers When receiving strong sig nals the detected voltage increases and the AGC voltage decreases Therefore the receiver obtain stable receiver gain 4 1 10 IC RECORDER CIRCUIT LOGIC UNIT The IC RECOR...

Page 62: ...d ratio N data The PLL IC detects the out of step phase using the reference frequency and outputs it from pin 5 The output signal is passed through the low pass filter L6 C21 C22 and C40 and is then a...

Page 63: ...409 4500 MHz and 448 7500 MHz The oscillated signal is applied to the 2nd mixer RF unit IC10 pin 3 and is then mixed with the 1st IF signal A part of oscillated signal from the 2nd C VCO circuit is ap...

Page 64: ...O circuit Q1 and D3 gener ates 1001 MHz or 2002 MHz The oscillated signal is ampli fied at the buffer amplifier Q4 and passes through band switch When receiving 1305 2305 999 MHz RF signals 1001 MHz L...

Page 65: ...cuit Q510 D76 and then switches to the internal bar antenna The expander IC IC14 outputs the A TRAC bar antenna control signal from pin 8 The signal is applied to the level converter Q513 and is then...

Page 66: ...VHF3V A_UHF3V B_VHF3V B_UHF3V B_G3V B_800M3V B_AM3V 4 4 3 RF UNIT VOLTAGE LINES Description The voltage is same as connected battery pack The voltage is supplied to the charge controller Q32 Common 3...

Page 67: ...C B_R3C LCD_RESET LCD_RS LD2 B_VCO2 B_VCO3 B_VCO4 ECK ESIO LOGIC unit IC3 Continued Pin Port Description number name 3 8 9 46 17 18 19 20 21 24 25 26 31 34 36 38 39 40 41 42 43 44 45 46 47 Outputs dat...

Page 68: ...and selecting signal at the A BAND circuit Outputs 300 MHz band selecting sig nal at the A BAND circuit Outputs UHF band selecting signal at the A BAND circuit Outputs the A BAND 1st LO circuit contro...

Page 69: ...J4 MAIN unit and is then applied to the Q4 MAIN unit As Q4 turns ON the output signal from Q4 is applied to the D4 The signal is applied to the Q3 to turn ON then the output signal from Q3 is applied...

Page 70: ...or 8 SET keys to write the adjustment value to the CPU Refer to following list in detail KEY LOCK 8 SET OPERATION Write the REFERENCE FREQUENCY ADJUSTMENT value Write the BFO ADJUSTMENT value Write th...

Page 71: ...eceiving Set an SSG as Level A 35 dB Frequency 14 1005 MHz Modulation OFF Receiving Connect an SSG to the antenna connector and set as Frequency 14 1010 MHz Modulation OFF Receiving Set an SSG as Leve...

Page 72: ...D Center voltage adjustment B BAND L105 CP1 Center voltage check point A BAND Center voltage adjustment A BAND L21 RF UNIT BOTTOM VIEW BFO check point BFO CHECK POINT LOGIC UNIT TOP VIEW Reference fre...

Page 73: ...ctor and set as Level 0 56 V 112 dBm Frequency 118 1 MHz Receiving Connect an SSG to the antenna connector and set as Frequency 174 9 MHz Receiving Connect an SSG to the antenna connector and set as F...

Page 74: ...the antenna connector and set as Level 0 56 V 112 dBm Frequency 145 1 MHz Deviation 3 5 kHz Receiving Mode WFM Connect an SSG to the antenna connector and set as Level 5 6 V 92 dBm Deviation 52 5 kHz...

Page 75: ...nect an SSG to the antenna connector and set as Level 0 56 V 112 dBm Frequency 435 1 MHz Deviation 3 5 kHz Receiving Mode WFM Connect an SSG to the antenna connector and set as Level 5 6 V 92 dBm Devi...

Page 76: ...evel 0 56 V 112 dBm Frequency 2510 1 MHz Modulation 1 kHz Deviation 3 5 kHz Receiving Mode WFM Connect an SSG to the antenna connector and set as Level 32 V 77 dBm Deviation 52 5 kHz Receiving Push 8...

Page 77: ...1 k B S Surface mount R46 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k B R47 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k B R48 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k B R49 7030008300 S RESISTOR ERJ2GEJ 184 X...

Page 78: ...6 7030005290 S RESISTOR ERJ2GEJ 682 X 6 8 k B R27 7030005210 S RESISTOR ERJ2GEJ 822 X 8 2 k B R28 7030007340 S RESISTOR ERJ2GEJ 153 X 15 k B R29 7030005090 S RESISTOR ERJ2GEJ 104 X 100 k B R30 7030004...

Page 79: ...102 X 1 k T S Surface mount R17 7030008300 S RESISTOR ERJ2GEJ 184 X 180 k T R18 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k T R19 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k T R21 7030005120 S RESISTOR ERJ2GE...

Page 80: ...T R11 7030005300 S RESISTOR ERJ2GEJ 150 X 15 T R12 7030005530 S RESISTOR ERJ2GEJ 100 X 10 T R13 7030005300 S RESISTOR ERJ2GEJ 150 X 15 T R14 7030005720 S RESISTOR ERJ2GEJ 563 X 56 k B R15 7030004990...

Page 81: ...0 S CERAMIC ECJ0EB1C103K T C19 4030016790 S CERAMIC ECJ0EB1C103K T C20 4030017400 S CERAMIC ECJ0EC1H220J T C21 4030017400 S CERAMIC ECJ0EC1H220J T C22 4030016790 S CERAMIC ECJ0EB1C103K T C23 403001749...

Page 82: ...0005050 S RESISTOR ERJ2GEJ 103 X 10 k B R41 7030008010 S RESISTOR ERJ2GEJ 123 X 12 k B R42 7410001130 S ARRAY EXB28V102JX B R43 7030007340 S RESISTOR ERJ2GEJ 153 X 15 k B R45 7030005530 S RESISTOR ERJ...

Page 83: ...7030005570 S RESISTOR ERJ2GEJ 820 X 82 B R204 7030005570 S RESISTOR ERJ2GEJ 820 X 82 B R205 7030005570 S RESISTOR ERJ2GEJ 820 X 82 B R206 7030005570 S RESISTOR ERJ2GEJ 820 X 82 B R207 7030005090 S RES...

Page 84: ...0EB1E102K B C151 4030017460 S CERAMIC ECJ0EB1E102K B C152 4030008680 S CERAMIC C2012 JF 1C 105Z T B C153 4030016930 S CERAMIC ECJ0EB1A104K B C154 4030016930 S CERAMIC ECJ0EB1A104K B C155 4030017730 S...

Page 85: ...TPL3 T D34 1790001620 S DIODE 1SV308 TPL3 T D36 1790001620 S DIODE 1SV308 TPL3 T S Surface mount D57 1790001240 S DIODE MA2S728 TX B D58 1790001260 S DIODE MA2S077 TX T D59 1790001260 S DIODE MA2S077...

Page 86: ...T R20 7030007280 S RESISTOR ERJ2GEJ 331 X 330 T R26 7030005240 S RESISTOR ERJ2GEJ 473 X 47 k B R28 7030005160 S RESISTOR ERJ2GEJ 105 X 1 M B R29 7030005170 S RESISTOR ERJ2GEJ 474 X 470 k B R30 7030007...

Page 87: ...44 7030005120 S RESISTOR ERJ2GEJ 102 X 1 k T S Surface mount R445 7030005050 S RESISTOR ERJ2GEJ 103 X 10 k T R446 7030005050 S RESISTOR ERJ2GEJ 103 X 10 k B R447 7030004990 S RESISTOR ERJ2GEJ 221 X 22...

Page 88: ...790 S CERAMIC ECJ0EB1C103K T C241 4030011810 S CERAMIC C1608 JB 1A 224K T B C242 4030011810 S CERAMIC C1608 JB 1A 224K T T C259 4030017430 S CERAMIC ECJ0EC1H101J T C264 4030017460 S CERAMIC ECJ0EB1E10...

Page 89: ...C786 4030017700 S CERAMIC ECJ0EC1H151J B S Surface mount C788 4030016790 S CERAMIC ECJ0EB1C103K B C789 4030017460 S CERAMIC ECJ0EB1E102K B C790 4030016790 S CERAMIC ECJ0EB1C103K B C791 4550006200 S T...

Page 90: ...TE3 T Q1 1520000600 S TRANSISTOR 2SB1184 TL Q T Q2 1590001870 S TRANSISTOR DTA114EE TL T Q3 1590003450 S TRANSISTOR UNR9214J TX T Q4 1590001870 S TRANSISTOR DTA114EE TL T Q5 1590001870 S TRANSISTOR D...

Page 91: ...30011600 S CERAMIC C1608 JB 1E 104K T T C27 4030006860 S CERAMIC C1608 JB 1H 102K T T C28 4030011600 S CERAMIC C1608 JB 1E 104K T T C29 4030006860 S CERAMIC C1608 JB 1H 102K T T C30 4030011600 S CERAM...

Page 92: ...O case Y724 1 REF NO ORDER NO DESCRIPTION QTY 2NDCVCO BOARD MP1 8510016230 2699 C VCO case 1 REF NO ORDER NO DESCRIPTION QTY 2NDDVCO BOARD MP1 8510016230 2699 C VCO case 1 J1 6510024470 Connector BNC...

Page 93: ...2NDDVCO BOARD LOGIC UNIT REC UNIT RF UNIT J1 C W1 C SP1 C MP31 C MP32 C MP30 C MP29 C MP1 C MP2 C MP4 C MP18 C MP21 C MP3 C MP15 C MP11 C MP26 C S24 L MP1 1A MP1 R EP1 R MP1 D MP2 D MP1 2C MP1 2D MP1...

Page 94: ...SB1184 TL Q Symbol B1184 2SJ377 Symbol 4L DTA114EE TL Symbol 14 UNR9214J TX Symbol 8D B C E FH102 TL Symbol 102 HAT1023R EL Symbol 1023 S D G E1 B2 B1 C1 C2 E2 D2 D2 D1 D1 G2 S2 G1 S1 E1 C2 B1 C1 E2 B...

Page 95: ...C Board J1 1 40 20 21 LD2 3S GND B_VCO2 B_VCO3 B_VCO4 PLLCK PLLDATA STR2 HFC B1C B2C B3C D CLK LD1 EAR A_VCO1 A_VCO2 GND B_DET B_R3V GND B_NOISE B_RSSI 3V GND PLLBSTB PLLDSTB VP GND PLLESTB PLLCSTB P...

Page 96: ...EP2 HJ6 HJ9 RF_IN GND OSC PLLCK PLLDATA PLLESTB GND IF_OUT 8 1 to DOWNCONV BOARD J1 3V B_R3V B_VCO1 B_VCO2 B_VCO3 B_VCO4 GND B_VCO_OUT 1 8 to 1STBVCO BOARD J2 HJ7 VP GND PLLBSTB PLLDATA PLLCK BPS OSC...

Page 97: ...supply J6 J3 B DIAL A DIAL AOUT A_ATN B_ATN GND 1 4 to REC UNIT J6 HJ8 CP2 CP4 CP1 CP3 Li ion Battery EXT SP CI V from the external speaker LCD J5 1 40 20 21 LD2 3S GND B_VCO2 B_VCO3 B_VCO4 PLLCK PLLD...

Page 98: ...9 4 The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board AFOUT GND 1 2 1 2 J8 SP W18 W19 LOGIC UNIT BOTTOM VIEW...

Page 99: ...e next page shows the unit layout in the same configuration as the actual P C Board GND AOUT B_AIN A_ATN 4 1 to LOGIC UNIT HJ8 J6 VL DOWN USB VL UP SQL 3V SUB_3C VOL_UP_DOWN SQL CPU_TX CPU_RX 1 6 to L...

Page 100: ...The combination of this page and the previous page shows the unit layout in the same configuration as the actual P C Board 9 6 REC UNIT BOTTOM VIEW...

Page 101: ...APS C_VCO_OUT GND to RF UNIT HJ5 1 5 OSC GND 3V PLLCK PLLDATA PLLDSTB to RF UNIT HJ4 6 1 J2 J1 B R3V GND BPS D_VCO_OUT GND to RF UNIT HJ9 1 5 OSC GND 3V PLLCK PLLDATA PLLDSTB to RF UNIT HJ8 6 1 9 7 9...

Page 102: ...6 to RF UNIT HJ11 J1 J2 J2 B_VCO_OUT GND B_VCO4 B_VCO3 B_VCO2 B_VCO1 B_R3V 3V 8 1 to RF UNIT HJ6 J2 A_VCO_OUT GND GND A_VCO3 A_VCO2 A_VCO1 A_R3V 3V 8 1 to RF UNIT HJ2 J1 OSC BPS PLLCK PLLDATA PLLBSTB...

Page 103: ...HVC350B Q1 FH102 VCO FIL RIPPLE Q4 2SC4617 FIL LOOP IC1 MB15E03SL BUFF Q3 2SC5277 3 REG Q501 UNR9113J 300M3V 3 REG Q502 XP1113 A_VHF3V A_UHF3V 3 REG Q502 XP1113 B_VHF3V 3 REG Q554 XP1113 B_UHF3V 3 REG...

Page 104: ...01 Q26 2SJ144 Q22 2SC4617 Q24 XP6501 Q27 2SJ144 VR SW Q19 2SJ144 B AMUTE IC7 SM6451B Q12 2SC4617 Q16 2SC4617 IC5 TA31056F Q7 XP1501 Q8 2SA1588 Q9 2SB1132 ROUT EXTSP INTSP A_DET B_DET Li EXTDC CHGC CHG...

Page 105: ...28 D170 MA2S728 C872 0 1 CP3 ANTENNA 0 1500 3304 9999 MHz IC1 PC2757TB 1 RFI 2 GND 3 LO 4 PS 5 VCC 6 IFO FI1 EFCH266MKQP1 I IC10 PC2757TB 1 RFI 2 GND 3 LO 4 PS 5 VCC 6 IFO Q510 UMD6 1 2 3 4 5 6 D1 HVC...

Page 106: ...14 MA2S728 R30 3 3k R179 150k R394 27k R393 22k C717 0 1 C720 0 01 C890 0 1 R462 3 9k C794 0 001 C797 0 001 D139 MA2S728 R451 3 3k R453 150k C790 0 01 Q5 2SC5006 Q542 2SC5006 FI6 CFWS450K3 I R359 220k...

Page 107: ...0 10k R34 10k R41 12k R15 100k D13 1SS400 Q3 2SA1586 Q6 2SC4116 R20 100k R39 10k D31 1SS400 D30 1SS400 D26 1SS400 D27 1SS400 C41 0 1 IC2 BD5228G 1 OUT 2 VDD 3 VSS 4 NC 5 CD J3 J8 1 2 3 C171 0 01 R178...

Page 108: ...708 16 384 MHz D0 D1 D2 D3 D4 D5 D6 D7 D4 D3 D2 D1 D0 D7 D6 D5 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 NC NC NC NC I O0 I O1 I O2 I O3 NC NC NC VSS VCC NC NC NC I O4 I...

Page 109: ...2SC5006 Q5 2SC5006 Q3 2SC5006 IC2 PC2746TB Q9 2SC5231 Q2 2SC5006 Q1 2SC5006 Q7 2SC4117 Q6 2SK880 Q12 2SC5277 IC3 MB15T61UL Q8 2SC5231 Q10 XP1113 Q11 XP1113 1STBVCO BOARD C25 0 001 L11 0 27 H R16 6 8k...

Page 110: ...HJ5 to RF unit HJ4 Explanatory notes VOLTAGE LINE 2 4V 3 0V 2 3V 1 7V 0 7V 3 0V 2 3V 11 6 2NDCVCO BOARD 2NDDVCO BOARD Q1 FH102 Q4 2SC4617 Q3 2SC5277 IC1 MB15E03SL R2 47k R3 330 C6 0 001 R4 1k C1 0 33...

Page 111: ...p IF _ OUT IF _ OUT 1 RFI 2 GND 3 LO 4 PS 5 VCC 6 IFO C56 47p R2 470 DOWN_CONV 3V C1 10p C2 8p C5 470p 1 IN 2 GND 3 GND 4 OUT 5 GND 6 VCC R1 180 USA EUR C4 8p C3 6p R5 4 7k L2 8 2nH L1 8 2nH C41 15p C...

Page 112: ...ox SKT UK 1 MP1 8930062600 2708 holder 1 MP2 8110007620 2505 cover 1 MP3 8810009990 Screw PH BT M3 X 8 ZK 8 MP4 8930039620 Stand leg cushion A 2 MP5 8930051010 2308 terminal holder 1 MP6 8930051020 23...

Page 113: ...SB20 03P R3 560 R21 560 C13 0 001 C15 0 001 C14 0 001 C16 0 15 C6 0 1 R2 150 CP1 C22 0 1 C24 0 1 C25 0 001 C26 0 1 C23 0 001 J4 1 2 3 4 5 6 7 8 9 C27 0 001 CHGOUT CHGOUT DET2 DET2 DET2 to TANSHI board...

Page 114: ...CP6 J4 CHGOUT CHGOUT DET2 BATT DET1 BATT SW CONT THD 1 9 to TANSHI BOARD J1 J1 THD CONT 5V BATT DET1 BATT DET2 CHGOUT CHGOUT 9 1 to BC 156 MAIN UNIT J4 12 3 12 4 BC 156 BOARD LAYOUTS MAIN UNIT TOP VI...

Page 115: ...12 4 MAIN UNIT BOTTOM VIEW...

Page 116: ...454 7619 Glenwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 Fax 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com Unit 1 103 Garden Road Clayton VIC...

Page 117: ...S 14104MZ C1 2004 Icom Inc 1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan...

Search results

Summary of Contents for IC-R20

Reviews:

Related manuals for IC-R20

Brands by name

Popular brands

Icom IC-R20, Service Manual

Search results

Summary of Contents for IC-R20

Reviews:

Related manuals for IC-R20

Brands by name

Popular brands