Icom IC-2720 Service Manual Download

Page: 24 / 51

S.=Surface mount

[MAIN UNIT]

R32

7030003280 S.RESISTOR

ERJ3GEYJ 470 V (47

Ω

)

R33

7030000220 S.RESISTOR

MCR10EZHJ 47

Ω

(470)

R38

7030003260 S.RESISTOR

ERJ3GEYJ 330 V (33

Ω

)

R39

7030003260 S.RESISTOR

ERJ3GEYJ 330 V (33

Ω

)

R40

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

Ω

)

R41

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

Ω

)

R43

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R44

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R45

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R47

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R48

7030000340 S.RESISTOR

MCR10EZHJ 470

Ω

(471)

R51

7030003490 S.RESISTOR

ERJ3GEYJ 272 V (2.7 k

Ω

)

R52

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R53

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R54

7030000280 S.RESISTOR

MCR10EZHJ 150

Ω

(151)

R55

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R56

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R58

7030003720 S.RESISTOR

ERJ3GEYJ 224 V (220 k

Ω

)

R59

7030003740 S.RESISTOR

ERJ3GEYJ 334 V (330 k

Ω

)

R61

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R62

7030003710 S.RESISTOR

ERJ3GEYJ 184 V (180 k

Ω

)

R63

7030003620 S.RESISTOR

ERJ3GEYJ 333 V (33 k

Ω

)

R64

7030000340 S.RESISTOR

MCR10EZHJ 470

Ω

(471)

R65

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R68

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R69

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R70

7030003530 S.RESISTOR

ERJ3GEYJ 562 V (5.6 k

Ω

)

R71

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R72

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R73

7030003340 S.RESISTOR

ERJ3GEYJ 151 V (150

Ω

)

R74

7030003340 S.RESISTOR

ERJ3GEYJ 151 V (150

Ω

)

R75

7030000270 S.RESISTOR

MCR10EZHJ 120

Ω

(121)

R76

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

Ω

)

R77

7030004050 S.RESISTOR

ERJ3GEYJ 1R0 V (1

Ω

)

R78

7030000190 S.RESISTOR

MCR10EZHJ 27

Ω

(270)

R79

7030006270 S.RESISTOR

ERJ12YJ221U (220

Ω

)

R80

7030000230 S.RESISTOR

MCR10EZHJ 56

Ω

(560)

R81

7030000120 S.RESISTOR

MCR10EZHJ 6.8

Ω

(6R8)

R82

7030003280 S.RESISTOR

ERJ3GEYJ 470 V (47

Ω

)

R83

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R84

7030000190 S.RESISTOR

MCR10EZHJ 27

Ω

(270)

R85

7030003590 S.RESISTOR

ERJ3GEYJ 183 V (18 k

Ω

)

R86

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R87

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R89

7030003490 S.RESISTOR

ERJ3GEYJ 272 V (2.7 k

Ω

)

R90

7030003490 S.RESISTOR

ERJ3GEYJ 272 V (2.7 k

Ω

)

R91

7030000340 S.RESISTOR

MCR10EZHJ 470

Ω

(471)

R92

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R93

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R94

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R95

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R96

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R97

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R98

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R99

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R100

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R102

7030006070 S.RESISTOR

ERJ12YJ101U (100

Ω

)

R103

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R104

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R105

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R106

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R107

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R108

7030008350 S.RESISTOR

ERJ12YJ390U

R109

7030003280 S.RESISTOR

ERJ3GEYJ 470 V (47

Ω

)

R110

7030003280 S.RESISTOR

ERJ3GEYJ 470 V (47

Ω

)

R111

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R112

7030003340 S.RESISTOR

ERJ3GEYJ 151 V (150

Ω

)

R113

7030003270 S.RESISTOR

ERJ3GEYJ 390 V (39

Ω

)

R114

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

Ω

)

R115

7030003610 S.RESISTOR

ERJ3GEYJ 273 V (27 k

Ω

)

R117

7030003710 S.RESISTOR

ERJ3GEYJ 184 V (180 k

Ω

)

R118

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R120

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R123

7030003710 S.RESISTOR

ERJ3GEYJ 184 V (180 k

Ω

)

R124

7030003630 S.RESISTOR

ERJ3GEYJ 393 V (39 k

Ω

)

R125

7030003840 S.RESISTOR

ERJ3GEYJ 225 V (2.2 M

Ω

)

R126

7030003630 S.RESISTOR

ERJ3GEYJ 393 V (39 k

Ω

)

R127

7030003840 S.RESISTOR

ERJ3GEYJ 225 V (2.2 M

Ω

)

R129

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R130

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R131

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R132

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R133

7030003600 S.RESISTOR

ERJ3GEYJ 223 V (22 k

Ω

)

[USA]

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

Ω

) [OTHER]

R134

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R135

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R137

7030000320 S.RESISTOR

MCR10EZHJ 330

Ω

(331)

R138

7030000500 S.RESISTOR

MCR10EZHJ 10 k

Ω

R139

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

Ω

)

R140

7030003530 S.RESISTOR

ERJ3GEYJ 562 V (5.6 k

Ω

)

[USA]

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

) [OTHER]

R141

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R142

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R143

7030000500 S.RESISTOR

MCR10EZHJ 10 k

Ω

R144

7030000380 S.RESISTOR

MCR10EZHJ 1 k

Ω

R145

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

Ω

)

R147

7030003480 S.RESISTOR

ERJ3GEYJ 222 V (2.2 k

Ω

)

R148

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R149

7030004050 S.RESISTOR

ERJ3GEYJ 1R0 V (1

Ω

)

R150

7030003330 S.RESISTOR

ERJ3GEYJ 121 V (120

Ω

)

R151

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R152

7030004050 S.RESISTOR

ERJ3GEYJ 1R0 V (1

Ω

)

R154

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

Ω

)

R155

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R156

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R157

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R158

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R159

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R160

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R161

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R162

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R163

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10

Ω

)

R164

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10

Ω

)

R165

7030000360 S.RESISTOR

MCR10EZHJ 680

Ω

(681)

R166

7030000360 S.RESISTOR

MCR10EZHJ 680

Ω

(681)

R172

7030003640 S.RESISTOR

ERJ3GEYJ 473 V (47 k

Ω

)

R173

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R174

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R175

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R176

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R177

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

Ω

)

R178

7030003270 S.RESISTOR

ERJ3GEYJ 390 V (39

Ω

)

R179

7030003340 S.RESISTOR

ERJ3GEYJ 151 V (150

Ω

)

R180

7030003340 S.RESISTOR

ERJ3GEYJ 151 V (150

Ω

)

R181

7030003670 S.RESISTOR

ERJ3GEYJ 823 V (82 k

Ω

)

R182

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R183

7030003220 S.RESISTOR

ERJ3GEYJ 150 V (15

Ω

)

R184

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R185

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R189

7030003630 S.RESISTOR

ERJ3GEYJ 393 V (39 k

Ω

)

R190

7030003630 S.RESISTOR

ERJ3GEYJ 393 V (39 k

Ω

)

R191

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R192

7030003200 S.RESISTOR

ERJ3GEYJ 100 V (10

Ω

)

R193

7030003520 S.RESISTOR

ERJ3GEYJ 472 V (4.7 k

Ω

)

R194

7030003440 S.RESISTOR

ERJ3GEYJ 102 V (1 k

Ω

)

R195

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R196

7030003220 S.RESISTOR

ERJ3GEYJ 150 V (15

Ω

)

R197

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R198

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R199

7030003220 S.RESISTOR

ERJ3GEYJ 150 V (15

Ω

)

R200

7030003380 S.RESISTOR

ERJ3GEYJ 331 V (330

Ω

)

R1003

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1004

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1005

7030003510 S.RESISTOR

ERJ3GEYJ 392 V (3.9 k

Ω

)

R1006

7030003580 S.RESISTOR

ERJ3GEYJ 153 V (15 k

Ω

)

R1009

7030003630 S.RESISTOR

ERJ3GEYJ 393 V (39 k

Ω

)

R1010

7030003320 S.RESISTOR

ERJ3GEYJ 101 V (100

Ω

)

R1012

7030003660 S.RESISTOR

ERJ3GEYJ 683 V (68 k

Ω

)

R1013

7030003400 S.RESISTOR

ERJ3GEYJ 471 V (470

Ω

)

R1015

7030003660 S.RESISTOR

ERJ3GEYJ 683 V (68 k

Ω

)

R1016

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1017

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1018

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1019

7030003450 S.RESISTOR

ERJ3GEYJ 122 V (1.2 k

Ω

)

R1020

7030003680 S.RESISTOR

ERJ3GEYJ 104 V (100 k

Ω

)

R1021

7030003450 S.RESISTOR

ERJ3GEYJ 122 V (1.2 k

Ω

)

R1022

7030003820 S.RESISTOR

ERJ3GEYJ 155 V (1.5 M

Ω

)

R1023

7030003820 S.RESISTOR

ERJ3GEYJ 155 V (1.5 M

Ω

)

R1024

7030003700 S.RESISTOR

ERJ3GEYJ 154 V (150 k

Ω

)

R1025

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R1026

7030003720 S.RESISTOR

ERJ3GEYJ 224 V (220 k

Ω

)

R1027

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R1028

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

R1029

7030003560 S.RESISTOR

ERJ3GEYJ 103 V (10 k

Ω

)

5 - 5

REF

ORDER

DESCRIPTION

NO.

REF

ORDER

DESCRIPTION

NO.

Summary of Contents for IC-2720

Page 1: ...DUAL BAND FM TRANSCEIVER i2720H SERVICE MANUAL ...

Page 2: ...IC 2720H bottom cover 10 pieces Addresses are provided on the inside back cover for your convenience REPAIR NOTES 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transceiver until the transceiver is disconnected from its power source 3 DO NOT force any of the variable components Turn them slowly and smoothly 4 DO NOT short any circuits or electronic parts A...

Page 3: ...RCUITS 4 5 4 3 PLL CIRCUITS 4 6 4 4 POWER SUPPLY CIRCUITS 4 8 4 5 CPU PORT ALLOCATIONS 4 10 SECTION 5 PARTS LIST SECTION 6 MECHANICAL PARTS AND DISASSEMBLY SECTION 7 SEMI CONDUCTOR INFORMATION SECTION 8 BOARD LAYOUTS 8 1 CONTROL UNIT 8 1 8 2 MAIN UNIT 8 3 8 3 VCO UNIT 8 5 SECTION 9 BLOCK DIAGRAM SECTION 10 VOLTAGE DIAGRAMS 10 1 CONTROL UNIT 10 1 10 2 MAIN AND VCO UNITS 10 2 ...

Page 4: ...on system Variable reactance frequency Maximum frequency deviation 5 0 kHz Spurious emissions Less than 60 dB Microphone connector 8 pin modular jack 600 Ω M RECEIVER Receive system Double conversion superheterodyne Intermediate frequency 1st IF 38 85 MHz 46 05 MHz Left right side band 2nd IF 450 kHz 455 kHz Sensitivity Less than 0 18 µV at 12 dB SINAD Squelch sensitivity Less than 0 13 µV at thre...

Page 5: ...020MLT Key back light DS16 DS17 LN1371G Key back light DS15 DS18 LN1371G MAIN UNIT TOP VIEW VHF low pass filter Power amplifier Q27 RD70HVF1 Drive amplifier Q25 2SK3075 Main CPU IC2013 HD64F2144AFA20 VCO unit AF amplifier IC2012 LA4445 VHF low pass filter Power amplifier Q27 RD70HVF1 Drive amplifier Q25 2SK3075 Main CPU IC2013 HD64F2144AFA20 VCO unit AF amplifier IC2012 LA4445 VHF RX Pre amplifier...

Page 6: ...75S01F D2 MA8047 Mic amplifier IC5 TA75S558F Q15 2SC4116 MAIN UNIT BOTTOM VIEW D A converter IC1 M62352GP 8V regurator IC2003 TA7808F Mic amplifier IC2014 TA75S558F Analog switch IC2007 BU4066BCFV IC2010 BU4066BCFV D A converter IC1 M62352GP UHF low pass filter circuit Ceramic bandpass filters FI1000 CFWM450E FI1001 CFWS450HT FI1002 CFWM455E APC amplifier IC2 TA75S01F PLL circuit 5V regurator IC20...

Page 7: ...ws A and remove the cover Disconnect two cables B from J1 and J2007 Remove the clip c A A B C J2007 J1 G F G F H E MAIN UNIT J I Unsolder 3 points E Unscrew 4 screws F Unsolder 4 points G and remove the cover H Unscrew 2 screws I Unscrew 12 screws J and remove MAIN unit 3 1 ...

Page 8: ... Removing the CONTROL unit Remove 6 knobs A A A Unscrew 4 screws B and remove the cover Remove the plate C and remove CONTROL unit B C CONTROL UNIT 3 2 ...

Page 9: ...o the RX band swtiching circuit Q34 D66 RL1 and are applied to the left side displayed RX circuit 4 1 2 RF CIRCUIT FOR LEFT SIDE DISPLAY MAIN UNIT RF SIGNALS V V 118 MHz 180 MHz The amplified signals are applied to the RF amplifier Q29 after being passed through the attenuator D59 and band pass filter D47 D53 The signals are applied to the RX band switching circuit D28 via the another bandpass fil...

Page 10: ... pin 5 then demodulated into AF sig nals at the quadrature detector section pins 10 11 The detected AF signals are output from pin 9 and are applied to the AF circuit via the AM FM selector circuit IC2015 pins 7 1 AM MODE The 2nd IF signal is output from the FM IF IC IC1001 pin 3 and passes through the ceramic bandpass filter FI1000 The filtered signal is applied to the AM detector circuit Q1017 t...

Page 11: ...ing circuit D11 RF SIGNALS V U2 375 MHz 550 MHz The amplified signals are applied to the RF amplifier Q19 after being passed through the attenuator D24 and band pass filter D22 D72 The signals are applied to the RX band switching circuit D8 via the another bandpass filter D12 D16 to supress the unwanted signals The signals from the RX band swtiching circuits are then applied to the right side disp...

Page 12: ...l speaker jack J2005 and then to the internal speak er The electronic volume control circuit controls AF gain there fore the AF output level is according to the VOL setting and also the squelch conditions 4 1 11 NOISE SQUELCH CIRCUIT FOR RIGHT SIDE DISPLAY MAIN UNIT NOISE SQUELCH A noise squelch circuit cuts out AF signals when no RF sig nal is received By detecting noise components in the AF sig ...

Page 13: ...r IC IC1009 pin 11 as MOD signal 4 2 2 VHF MODULATION CIRCUIT MAIN AND VCO UNITS The modulation circuit modulates the oscillating signal RF signal using the microphone audio signals The MOD signal from the D A convertor IC IC1009 pin 11 changes the reactance of D5 VCO unit to modulate the oscillated signal at the VHF VCO circuit VCO unit Q6 The modulated signal is amplified at the buffer amplifier...

Page 14: ...rough the buffer amplifiers Q1043 Q1016 and VCO switch D1023 is applied to the PLL IC for right side display IC1008 pin 8 FROM THE UHF VCO CIRCUIT An oscillated signal from the UHF VCO circuit Q1038 D1016 D1018 passes through the buffer amplifiers Q1044 Q1016 and VCO switch D1023 is applied to the right side diplayed PLL IC IC1008 pin 8 And is then prescaled in the PLL IC based on the divided rati...

Page 15: ...IC1 pin 8 And is then prescaled in the PLL IC based on the divided ratio N data The reference signal is generated at the refenrece oscillator X1 12 8 MHz The reference signal is also applied to the PLL IC The PLL IC detects the out of step phase using the reference frequency and outputs it from pin 16 The output signal is passed through the loop fil ter Q2 Q3 D2 and is then applied to the left sid...

Page 16: ... is then fed back to the PLL IC IC1 pin 8 as the comparison signal 4 8 Shift register Prescaler Phase detector Loop filter Programmable divider Programmable reference divider X1 12 8 MHz 3 38 4 MHz 2nd LO signal to the FM IF IC for left side display IC1001 pin 2 Q1009 Q1012 Q6 D3 D5 VCO for left side display Buff Q1 Q7 Buff Q8 VCO UNIT MAIN UNIT D12 D13 Q2 Q3 D2 9 10 PLLCK IC1 PLL IC for left side...

Page 17: ...tor circuit Q2 The output voltage is applied to the RF amplifier Q30 for right side display s 144 MHz bandpass filter Line HV VCC 5V 8V 5VS VT8 UT8 VUT8 L_AM5 R_AM5 L_R5 R_R5 L140_R5 R140_R5 Description Receive 5 V produced from the 5VS line at the R_AM5 regulator circuit Q3 The output voltage is applied to the RF amplifier Q31 for left side display s 220 MHz bandpass filter Receive 5 V produced f...

Page 18: ... DTMF DTCS P_SQL Pin Port Description number name Outputs cooling fan control signal Outputs the cloing data signal Input port for the cloing data signal Outputs serial data to the D A convert er IC IC1 pins 15 17 Outputs microphone mute control sig nal for MAIN unit Low While the microphone is muting Outputs AF mute control signal for left side display High While AF audio is muting Outputs AF mut...

Page 19: ...port for the PLL unlock signal for right side display IC1008 pin 7 Low The PLL lock voltage is unlocked for right side display Outputs packet band select signal Input ports for Initial matrix Outputs serial signal to the PLL IC IC1008 pins 9 10 and VCO unit IC1 pins 9 10 Outputs Initial matrix signal 75 76 77 78 79 80 81 82 83 84 85 86 89 90 91 93 94 95 96 L_400SHIFT R_RX400 R_RX140 LR_R5CTRL L_VC...

Page 20: ...Ω R53 7030003390 S RESISTOR ERJ3GEYJ 391 V 390 Ω R54 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R55 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R56 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R57 7030003390 S RESISTOR ERJ3GEYJ 391 V 390 Ω R58 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R59 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R60 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R61 7030003580 S RESIS...

Page 21: ...5R IC2010 1130008090 S IC BU4066BCFV E1 IC2011 1110004490 S IC M62429FP 700C IC2012 1110002540 IC LA4445 IC2013 1140010840 S IC HD64F2144AFA20 FX 2493 USA USA 1140010830 S IC HD64F2144AFA20 FX 2493 EXP OTHER IC2014 1130007370 S IC TA75S558F TE85L IC2015 1130006220 S IC TC4W53FU TE12L IC2016 1130006220 S IC TC4W53FU TE12L Q1 1590000860 S TRANSISTOR DTA114YUA T106 Q2 1590000860 S TRANSISTOR DTA114YU...

Page 22: ...ODE MA2S728 TX D51 1750000710 S VARICAP HVC350BTRF D52 1790001250 S DIODE MA2S111 TX D53 1750000710 S VARICAP HVC350BTRF D54 1750000710 S VARICAP HVC350BTRF D55 1750000510 S DIODE UM9401F D57 1790000980 S DIODE MA742 TX D58 1790001240 S DIODE MA2S728 TX D59 1720000240 S DIODE 1SV172 TE85R D60 1720000240 S DIODE 1SV172 TE85R D61 1790000980 S DIODE MA742 TX D62 1790001260 S DIODE MA2S077 TX D63 1790...

Page 23: ...05740 S COIL ELJRE 47NG F L93 6200007770 S COIL LQW2BHNR10J01L L94 6200005670 S COIL ELJRE 12NG F L1000 6200004470 S COIL MLF1608D R12K T L1001 6200005190 S COIL MLF1608D R56K T L1002 6200007620 S COIL LL1608 FH47NJ L1004 6200005740 S COIL ELJRE 47NG F L1006 6200002610 S COIL NL 252018T R47J L1007 6200002610 S COIL NL 252018T R47J L1010 6200002360 S COIL LQW31HN33NJ01L L1012 6200002330 S COIL LQW3...

Page 24: ...7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R133 7030003600 S RESISTOR ERJ3GEYJ 223 V 22 kΩ USA 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 kΩ OTHER R134 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R135 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R137 7030000320 S RESISTOR MCR10EZHJ 330 Ω 331 R138 7030000500 S RESISTOR MCR10EZHJ 10 kΩ R139 7030003580 S RESISTOR ERJ3GEYJ 153 V 15 kΩ R140 7030003530 S ...

Page 25: ... R1126 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R1127 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kΩ R1129 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R1131 7030003590 S RESISTOR ERJ3GEYJ 183 V 18 kΩ R1132 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R1135 7030003610 S RESISTOR ERJ3GEYJ 273 V 27 kΩ R1136 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R1137 7030003380 S RESISTOR ERJ3GEYJ 331 V 330 Ω R1139 70...

Page 26: ...GEYJ 225 V 2 2 MΩ R2099 7030003580 S RESISTOR ERJ3GEYJ 153 V 15 kΩ R2100 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kΩ R2101 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kΩ R2102 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 kΩ R2103 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 kΩ R2104 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kΩ R2105 7510001470 S THERMISTOR NTCG20 4AG 473JT R2106 7030003680 S RESISTOR ERJ3GEYJ 1...

Page 27: ...8 JB 1H 102K T C56 4030006980 S CERAMIC C1608 CH 1H 070D T C57 4030006980 S CERAMIC C1608 CH 1H 070D T C58 4030006900 S CERAMIC C1608 JB 1H 103K T C59 4030006990 S CERAMIC C1608 CH 1H 080D T C60 4030006990 S CERAMIC C1608 CH 1H 080D T C63 4030011600 S CERAMIC C1608 JB 1E 104K T C65 4030008920 S CERAMIC C1608 JB 1H 473K T C66 4030009570 S CERAMIC C1608 CH 1H 0R3B T C67 4030009350 S CERAMIC C1608 CH...

Page 28: ...RM31M2C2H150JV01L C264 4030011160 S CERAMIC GRM31M2C2H150JV01L C265 4030011730 S CERAMIC GRM31M2C2H101JV01L C266 4030006920 S CERAMIC C1608 CH 1H 010C T C267 4030006920 S CERAMIC C1608 CH 1H 010C T C268 4030006920 S CERAMIC C1608 CH 1H 010C T C269 4030006860 S CERAMIC C1608 JB 1H 102K T C270 4030006860 S CERAMIC C1608 JB 1H 102K T C271 4030006860 S CERAMIC C1608 JB 1H 102K T C272 4030006860 S CERA...

Page 29: ...J T C1193 4030006860 S CERAMIC C1608 JB 1H 102K T C1194 4030006860 S CERAMIC C1608 JB 1H 102K T C1195 4030006860 S CERAMIC C1608 JB 1H 102K T C1197 4030006900 S CERAMIC C1608 JB 1H 103K T C1198 4030006900 S CERAMIC C1608 JB 1H 103K T C1200 4030007050 S CERAMIC C1608 CH 1H 220J T C1201 4030006950 S CERAMIC C1608 CH 1H 040C T C1202 4030009550 S CERAMIC C1608 CH 1H 2R5B T C1203 4030009500 S CERAMIC C...

Page 30: ...ERAMIC C1608 CH 1H 221J T C2129 4030007170 S CERAMIC C1608 CH 1H 221J T C2130 4030006860 S CERAMIC C1608 JB 1H 102K T C2131 4030006860 S CERAMIC C1608 JB 1H 102K T C2132 4030006860 S CERAMIC C1608 JB 1H 102K T C2133 4030017200 S CERAMIC GRM31BR32J102KY01L C2134 4030006860 S CERAMIC C1608 JB 1H 102K T C2135 4030006860 S CERAMIC C1608 JB 1H 102K T C2136 4030007070 S CERAMIC C1608 CH 1H 330J T C2137 ...

Page 31: ...60 S IC µPB1509GV E1 Q1 1530002560 S TRANSISTOR 2SC4403 3 TL Q2 1510000770 S TRANSISTOR 2SA1586 GR TE85R Q3 1530002690 S TRANSISTOR 2SC4116 GR TE85R Q4 1590000430 S TRANSISTOR DTC144EUA T106 Q5 1590001320 S TRANSISTOR DTC143ZUA T106 Q6 1530003580 S TRANSISTOR 2SC5231C8 TL Q7 1530003580 S TRANSISTOR 2SC5231C8 TL Q8 1530003580 S TRANSISTOR 2SC5231C8 TL Q9 1590000440 S TRANSISTOR DTA143ZUA T106 Q10 1...

Page 32: ...LUM TESVA 1V 104M1 8L C30 4030011600 S CERAMIC C1608 JB 1E 104K T C31 4030006860 S CERAMIC C1608 JB 1H 102K T C32 4030006860 S CERAMIC C1608 JB 1H 102K T C33 4030006860 S CERAMIC C1608 JB 1H 102K T C34 4030009570 S CERAMIC C1608 CH 1H 0R3B T C35 4030006860 S CERAMIC C1608 JB 1H 102K T C36 4030006860 S CERAMIC C1608 JB 1H 102K T C37 4030007020 S CERAMIC C1608 CH 1H 120J T C38 4030007050 S CERAMIC C...

Page 33: ...8930057080 2493 LCD plate 1 MP11 8810009220 Screw B0 M2 8 ZK 4 MP13 8930059030 Copper sheet O 1 CONTROL UNIT ORDER NO REF NO DESCRIPTION QTY J2001 6510023110 Connector 3008L 8P8C 1 J2003 6510023160 Connector DN 508B 6 1 J2004 6450002220 Connector PJ 0008P 5 1 J2005 6450001440 Connector HSJ1403 01 010 1 J2006 6510023170 Connector 3008L 6P6C 1 W2 8900010980 Cable OPC 1131 1 MP1 8410002380 2399 heats...

Page 34: ...8 CT EP15 CT DS19 CT CONTROL UNIT VCO UNIT MAIN UNIT MP1 CT MP5 CT MP4 CT MP5 CT MP5 CT MP5 CT MP4 CT MP15 C MP2 C J2003 M J2001 M J2006 M MP4 V MP3 V MP1 V MP2 V MP19 C MP12 M MP7 C MP7 C MP17 C MP4 M MP10 C MP18 C MP6 M MP8 M MP9 M MP10 M MP3 M MP11 M MP2 M MP5 C WS1 C SP1 C MP3 C MP16 C Unit abbreviations C CHASSIS PARTS M MAIN UNIT CT CONTROL UNIT V VCO UNIT MP8 C MP8 C MP8 C MP8 C MP8 C MP8 C...

Page 35: ... SG Symbol ZG Symbol BAR Symbol LL Symbol LG Symbol AB Symbol QY Symbol R25 Symbol LY3 Symbol JT Symbol 24 Symbol C8 Symbol VH Symbol VG Symbol UP Symbol UB F Symbol K Symbol UN Symbol U7 Symbol WB Symbol 54 Symbol 113 Symbol 16 Symbol E23 Symbol 26_ Symbol 06 Symbol RD70HVF1 Symbol 8S Symbol 5C Symbol 5N S D G G S D A C A C A C C A1 A2 A C2 C1 A C A C A C A C A C A C A C A C A C A C A C A C BLACK...

Page 36: ...BAND V MHz SCAN M CALL MW MAIN BAND V MHz SCAN M CALL MW DUP MONI TONE DTMF LOW PRIO SQL DIAL DIAL SQL VOL SET VOL PWR HV 6 4 2 to MAIN unit J2006 5 3 1 J2 RDATA MIC TDATA GND MICE 2 4 6 8 to Microphone 1 3 5 7 J1 MICU D PTT MIC MICIN 8V EXTMIC MICE GND 8 1 ...

Page 37: ... BOTTOM VIEW CONTROL UNIT 1 100 50 51 25 26 76 75 8 2 ...

Page 38: ...76 100 L_RXLO GND L_VR5 L_UR5 REF_CON 5VS to VCO unit J5 OUT1 PLLDATA PLLCK REF_OSC L_LO_SW 8V REF_MOD L_PLLSW L_UNLOCK to VCO unit J2 to VCO unit J3 to VCO unit J4 MOD L_VCO_SHIFT OUT4 GND L_VCO8 L_TXLO to VCO unit J1 ANT CHASSIS J1 MP5 HV CHASSIS J2000 GND 8 2 MAIN UNIT TOP VIEW 8 3 ...

Page 39: ...N MIC PTT MICU D 4 2 1 6 5 3 to external equipment J2003 DATAOUT GND DATAIN PTTP PSQL AFOUT 6 5 1 2 J2006 CTHV RDATA MIC TXDATA GND MICE 1 8 5 1 4 7 14 8 8 14 7 1 1 7 14 8 9 16 8 1 16 9 1 8 1 4 8 9 16 8 1 5 5 8 4 1 1 10 20 11 1 4 8 5 1 7 16 8 MP5 BOTTOM VIEW MAIN UNIT 8 4 ...

Page 40: ...8 3 VCO UNIT TOP VIEW 1 8 16 9 1 4 8 5 8 5 ...

Page 41: ...REF_CON 5VS OUT1 1 3 J2 PLLDATA PLLCK REF_MOD 3 1 J4 L_PLLSW L_UNLOCK REF_OSC 3 to MAIN unit 1 J3 L_LO_SW 8V L_TXLO 6 1 J1 L_VCO8 GND OUT4 L_VCO_SHIFT MOD to MAIN unit to MAIN unit to MAIN unit to MAIN unit BOTTOM VIEW VCO UNIT 8 6 ...

Page 42: ...R5 R5 L140 R5 R140 _R5 L220 _R5 L300 _R5 R400 _R5 L400 _R5 R800 BUFF SHIFT MUTE CONTROL REF IC PLL FIL LOOP SW FILTER 8V 2SC4215 Q1009 2SC4116 Q1012 2SJ144 Q1010 2SJ144 Q1011 XP4601 Q1003 XP4601 Q1004 XP6501 Q1022 Q1025 XP6501 Q1014 Q1017 TC4W53FU IC2015 TC4W53FU IC2016 DET AM SEL AM FM DET AM SEL AM FM LPF LPF MUTE AF LPF LPF MUTE AF 8V 8V XP6501 Q1008 XP6501 Q1007 5VS M62363FP 650C IC1009 DTC144...

Page 43: ... BPF SW RX MA742 D57 D61 UM9401F D2070 D36 430 450MHz T UHF RD70HVF1 Q27 2SK3075 Q25 2SK3475 Q21 2SK2854 Q16 2SC4226 Q38 1SV308 D77 D78 Q22 DTA144EU IC2 TA75S01F HV VUT8 HPF HPF DET REV LPF DET SWR SW TX RX SW TX RX DET SWR LPF SW TX CTRL APC SW TX Q1048 DTC144EU D1039 MA2S077 MA2S077 D1026 MA2S077 D1038 2SC4226 Q1042 MA2S077 D1027 2SC4403 Q1016 MA2S077 D1023 D1024 MA2S077 D1049 MA2S077 D1028 1SV3...

Page 44: ...5 P81 SEG26 P82 SEG27 P83 SEG28 P84 SEG29 P85 SEG30 P86 SEG31 P87 SEG32 P90 SEG33 P31 UD P30 PWM P27 P26 P25 P24 P23 P22 SO1 P21 SI1 P20 SCK1 RES TEST OSC1 OCS2 VSS X2 X1 P17 IRQ3 TMIF P16 IRQ2 P15 IRQ1 TMIC P14 IRQ4 ADTRG P13 TMIG P12 TMOFH P11 TMOFL P10 TMOW AVSS PC3 AN11 PC2 AN10 PC1 AN9 PC0 AN8 PB7 AN7 PB6 AN6 PB5 AN5 PB4 AN4 PB3 AN3 PB2 AN2 PB1 AN1 PB0 AN0 AVCC P43 IRQ0 P42 TXD32 P41 RXD32 P4...

Page 45: ... 7 8 4 3 2 1 M62429FP IC2011 2SC4213 Q2010 33k R2056 0 47 C2031 10k R2063 R2058 10k R2054 33k R2053 0 47 C2027 10k R2055 2SC4213 Q2008 2SC4213 Q2011 470p C2034 10k R2065 0 47 C2032 33k R2060 2 2M R2092 0 1 C2060 2 2M R2091 C2064 1 C2065 1 R2095 10k R2096 10k 100k R2273 100k R2084 100k R2074 0 1 C2059 DTC144EU Q2006 I O O I O I I O CONT D CONT A VDD VEE CONT C CONT B I O O I O I I O 8 9 10 11 12 13...

Page 46: ...C22 2 2M R63 10p C21 68n L1 0 001 C18 2SC4403 Q1 10k R6 330 R2 22k R5 220 R7 1k R4 0 001 C15 22k R8 27p C19 0 01 C13 HVC376B D1 100k R3 10k R1 56p C16 R9 150 C17 4p 12 8MHz CR 718 X1 R10 22k 0 1 C20 470p C77 MA2S111 D14 47p C76 MB15A02PFV 1 IC1 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 R16 10k R14 10k R12 10k CLOCK DATA LE FC NC FOUT P B FIN LD GND DO VCC VP OSCOUT OSCIN 47n L1002 0 001 C1063 4 7k R1...

Page 47: ...01 C1100 R1114 68k 10k R1103 0 001 C1084 W2022 b R1149 100 FILIN FILOUT 9 10 11 12 13 14 15 16 8 7 6 5 4 3 2 1 AFOUT QUAD IFOUT RSSI N DET N REC DEC IFIN VCC MIXOUT OSCOUT MIXIN OSCIN GND 1 2 CFWM455E FI1002 5 4 3 XP6501 Q1025 XP6501 Q1022 6 5 4 1 2 3 6 5 4 1 2 3 C1146 0 1 L_SQL L_RSSI f a WN_SEL d C1110 0 047 C1279 0 033 h XP6501 Q1017 XP6501 Q1014 C2172 470p 0 1 C1099 0 01 C1068 C1274 0 1 W2025 ...

Page 48: ...7p 27p C77 R64 470 L25 0 15µ 2SK3475 Q21 2SK2854 Q16 2SC4226 Q38 150 R54 0 1 C52 470 R91 0 001 C104 2 7k R90 R89 2 7k R87 100 R52 2 2k R51 2 7k C47 0 1 470 R48 0 001 C44 8 2n L16 47 R33 C43 0 1 C39 47 C38 0 001 C40 5p R28 470 0 33µ L11 470p C29 4 7k R27 2 2k R24 0 1 C22 470 R19 C288 0 001 R11 330 680 R18 0 1 C21 0 001 C16 39 R12 100 R191 C286 0 001 L93 0 1µ 4 7k R193 1k R194 100 R2182 R2213 1k 1SV...

Page 49: ...2S077 D67 C164 0 001 C236 0 001 R164 10 D2049 MA2S111 D52 MA2S111 R159 10k 3p C214 C2012C 82NG L82 R158 47k C212 0 001 R156 100 C207 0 001 3SK272 Q33 C2012C R15G L84 C215 220p C211 0 001 R157 100k R2248 680 C2012C R18G L79 0 001 C227 100 R155 C208 8p R152 1 120 R150 C183 9p 100p C159 0 001 C189 0 001 C228 1k R148 1SV172 D60 0 001 C163 0 001 C172 33p C2168 100k R131 100k R135 100p C178 39n L69 64n ...

Page 50: ......

Page 51: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13907HZ C1 2002 Icom Inc ...

Search results

Summary of Contents for IC-2720

Reviews:

Related manuals for IC-2720

Brands by name

Popular brands

Icom IC-2720, Service Manual

Search results

Summary of Contents for IC-2720

Reviews:

Related manuals for IC-2720

Brands by name

Popular brands