Icom IC-R75 User Manual Download

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L911
LS-450

Q912
2SC4081 R

R914
10 k

R915
10 k

C914
2.2

L891
LS-450

R892
100

C892
0.0047

Q891
3SK131 MAS

R893
2.2 k

C893
0.0047

R894
22 k

C894
0.1

R895
330

L1001
220

C1010
0.1

Q801
2SC4081 R

R801
1 k

C801
0.1

R802
100

C811
0.0047

R817
2.7 k

R816
2.7 k

R814
3.3 k

R813
470

R812
470

R815
3.3 k

R821
3.3 k

R820
1 k

C813
0.1

C818
0.1

C841
0.0047

R823
10

R822
10

R825
NTCCM16083NH 681KC

R811
1.5 k

D763
MA77

D764
MA77

R765
10 k

R764
2.2 k

R796
2.2 k

R794
2.2 k

R795
4.7 k

C792
0.1

OPTIONAL
FILTER

IC1211C
NJM2058M

R833
4.7 M

R834
4.7 M

R835
1.5 M

R831
4.7 M

R832
4.7 M

R836
4.7 k

D831
1SS302

C831
0.0033

Q1001
2SK882 GR

C1002
0.0047

C1003
0.1

C1001
0.1

R1003
150 k

C1004
220 P

C1005
220 P

R1005
220 k

C1006
0.0047

C1008
10

OSCIN
OSCOUT
MIXOUT
VDD
IFIN
BIAS
FILOUT
FILIN

AFOUT

QUADIN

IFOUT

SOUT

NDET

NOUT

VSS

MIXIN

IC1001
TA31136FN

R1002
100

R1007
220

R1001
4.7 k

R1008
220 k

FMAF

AGC

C1009
0.1

C1007
100 P

R1006
1.5 k

X1001
CDB450C24

C1061
0.0047

C1064
0.1

C1067
22

R1066
22 k

R1062
22 k

R1061
100 k

C1063
10

C1062
100 P

D1061
1SS375

Q1061
XP4311

Q1063
2SC4081 R

R1063
1 k

R1067
330 k

R1201 68 k

SAMS

SALI

H5V

FMAF

14V

FMAF

SSAF

EAAF
SAAF

SQLS
AFS1
AFS2

R1202 2.2 k

X0 12
X1 14
X2 15
X3

INH

8 7

IC1201
3BU4052BCFV

SML

5V
8V
14V

H5V

C1217
0.1

DAFO
AFE

1
2
3
4

J1221
B4B-PH-SM3-TB

1
2
3
4

R-4

R1211
47 k

R1205 47 k

R1204 47 k

C1090
0.1

C1089
0.0047

R1084
47 k

R1101
1 k

R1103
1 k

R1104
3.3 k

R1105
2.2 k

R1082
1 k

R1102
1.5 k

J1081

TMP-J01X-V6

R1081
220

+SI
GAIN
GAIN
-SI
BIAS

+OUT

+CI

-CI

-OUT

VEE

IC1101
MC1496D

BFO

FUSE
HOLDER

F1352
S-N5054 #01

F1353
S-N5054 #01

C2031
0.001

C2032
0.001

C2033
0.001

C2034
0.001

ENV DET
DECODER IN
REF
AGC
IF IN

FIL L OUT
L NOTCH IN
FEEDBACK
UNFIL LOUT
UNFIL ROUT
FEEDBACK
R NOTCH IN
FIL R OUT

SS OUT 15

Q PILOT 16

I PILOT

PILOT DET IN

OSC IN

OSC FEEDBACK

STREO LAMP

GND

BLEND

LOOP FIL

VCC

Q OUT

L-R DET

I DET

IC2001
MC13022ADW

R2001
10 k

C2001
0.001

L2011
330

C2011
330 P

C2012
33 P

R2011
10 k

C2014
0.1

C2015
0.01

C2013
10

R2012
100 k

R2002
220

AMIF

SAAF

EAAF

SAMS

SALI

GND

C2016
10

R2022
1 k

C2024 47

R2021
3.9K

C2021
0.001

Q2021
DTC114EU

C2042
0.1

C2041
10

L2041
220

C2035
0.1

R2031
47 k

X2021
CSA3.60MGF103

C2022
39 P

C2023
12 P

C2036
0.1

R2032
47 k

R2051
47 k

C2051
2.2

J1701

HSJ0807-01-010

R1771
6.8 k

R1772
33 k

R1774
15 k

CIVE

CIV

Q1772
2SC4081 R

D1771
1SS355

R1773
47 k

L1771
220

H5V

C1752
10
C1753
10

C1754
10

C1+
V+
C1-
C2+
C2-
V-
T2O
R2I

VCC

GND

T1O

R1I

R1O

T1I
T2I

R2O

1
2
3
4
5
6
7
8

16
15
14
13
12
10
11
9

5
9
4
8
3
7
2
6
1

IC1751
DS14C232TM

CIV

CIVE

IC1771A
TC7W04F

Q1771
2SA1576 R

C1771
0.1

IC1771C
TC7W04F

IC1771B
TC7W04F

C912
220 P

Q911
2SK882 GR

C911
0.1

R911
100

R912
2.2 k

L892
LS-450

C895
22 P

C896
0.1

R897
100

C897
0.0047

R896
3.3 k

R898
10 k

R891
10 k

C891
0.1

R1064
680 k

C1066
2.2

C1065
10

R1065
4.7 k

Q1064
XP4311

Q1065
XP4311

R1068
10 k

AGRS

AGFS

AGSS

AGOS

Q1066
XP4311

C1085
0.0047

1
2
3
4
5
6
7

14
13
12
11
10
9
8

R1109
1 k

R1110
2.2 k

C1103
0.1

R1111
10

R1107
1.5 k

R1106
10

C1101
0.1

C1102
0.1

R1108
1 k

Q1031
2SC4081 R

R1031
220

R1032
220 k

R1033
1 k

C1031
0.1

C1502
0.0047

C1051
10

R1051
2.7 k

R1052
4.7 k

D1051
1SS375

R1053
470

Q1051
2SC4081 R

RFGV

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10
9

C1021
0.12

C1022
0.01

C1023
0.01

R1022
39 k

R1023
68 k

C1024
0.1

R1024
47 k

IC1211D
NJM2058M

R1021
10 k

R1004
3.3 k

C852
0.1

R855
10 k

R854
10 k

FI851
FL-65

D851
MA77

D852
MA77

C851
0.1

R852
220

R851
10 k

3F3K

3F6K

3F15

3F0P

C862
0.1

R865
10 k

R864
10 k

FI86
FL-65

D861
MA77

D862
MA77

C861
0.1

R862
220

R861
10 k

C872
0.1

R875
10 k

R874
3.9 k

FI871
FL-65

D871
MA77

D872
MA77

C871
0.1

R872
220

R871
3.9 k

C882
0.1

R885
10 k

R884
3.9 k

D881
MA77

D882
MA77

C881
0.1

R882
220

R881
3.9 k

R841
10 k

IC811
MC1496D

D783
MA77

D784
MA77

R785
10 k

R784
2.2 k

D773
MA77

D774
MA77

R775
10 k

R774
2.2 k

VCC

C1202
0.01

C1201
0.01

IC1211B
NJM2058M

IC1211A
NJM2058M

R1213
39 k

R1212
39 k

C1211
0.0015

C1212
0.0012

R1214
39 k

C1213
0.0033

C1215
0.1

C1081
0.0047

9MHz FIL

TER SOCKET

455kHz FIL

TER SOCKET

J781

PD-72

J782

PD-72

J783

PD-72

J784

PD-72

J881

PD-72

J882

PD-72

J883

PD-72

J884

PD-72

AGC

AGC
R8V
14V

AGC

R8V

FMNL

J81

TMP-J01X-V6

3LO

R824
220

C816
0.0047

CP1761

CP1762

DRES
DINT
DSTB
MDAT
MCK
5V
DSPS

R1231 470

R1232 470

R1233 470

R1235 470

R1234 470

R1236 470

DRSR
DITR
DST
MDTR
MCKR
5V
DSSR
GND
GND
GND

C1231
0.0047

J1231

52808-1090

OPTIONAL
UNIT
UT-106

OPTIONAL
UNIT
UT-102

1
2
3
4
5
6
7
8
9
10

MDAT
BUSY
5V
GND

J1271

52365-0891

SPST
MCK
SPCE
SPCH

1
3
5
7

2
4
6
8

J1751

RS-232C

R853
220

R863
220

R873
220

R883
220

R1215
39 k

C1214
560 P

R913
100

C913
0.1

+SI
GAIN
GAIN
-SI
BIAS

+OUT

+CI

-CI

-OUT

VEE

1
2
3
4
5
6
7

14
13
12
11
10
9
8

R819
1 k

C814
0.1

R818
2.7 k

C1216
0.1

C1751
10

C1755
10

C1756
0.1

CI-V

S-AM:

Other: 0 V

278

2.8 V

0 V

1.3 V

S-AM: 0 V
Other: 4.8 V

At receved: 4.5 V
Other: 0.1 V

5.0 V

4.5 V

0 V

7.6 V

2.3 V

7.9 V

2.5 V

5 V

7.4 V

1.5 V

0 V

2.6 V

7.5 V

0 V

*4.8 V

*3.0 V

*2.6 V

5.0 V

7.9 V

7.1 V

3.4 V

4.0 V

0 V

2.8 V

0.4 V

2.7 V

7.7V

1.9 V

0.6 V

* RF GAIN: MAX

10.0 V

0 V

COMPLETE VIEW

Summary of Contents for IC-R75

Page 1: ...SERVICE MANUAL COMMUNICATIONS RECEIVER...

Page 2: ...910051123 PCB B 5274C IC R75 PLL UNIT 1 pieces 8810005770 Screw Bih M3x8 ZK IC R75 Chassis 10 pieces Addresses are provided on the inside back cover for your convenience 1 Make sure a problem is inter...

Page 3: ...EDURES 4 1 PREPARATION 4 1 4 2 PLL ADJUSTMENT 4 2 4 3 RECEIVER ADJUSTMENT 4 4 4 4 SET MODE ADJUSTMENT 4 7 SECTION 5 PARTS LIST SECTION 6 MECHANICAL PARTS AND DISASSEMBLY SECTION 7 SEMI CONDUCTOR INFOR...

Page 4: ...Hz 6 dB less than 30 0 kHz 40 dB Audio output power More than 2 0 W at 10 distortion with an 8 load Antenna impedance 50 or 450 Squelch sensitivity threshold Preamplifiers are OFF 1 Preamplifier 1 is...

Page 5: ...it 3rd mixer circuit IC811 BFO circuit 2nd IF circuit PLL IC IC21 Noise blaker circuit VCO circuit BFO mixer circuit IC1101 Bandpass filter Fuse 3A MAIN UNIT PLL UNIT Back up battery BT 1521 3rd IF fi...

Page 6: ...e signals are applied to the low pass filter consisting of C170 C175 L171 L173 via the limitter circuit D141 D142 A diode is removed at the entrance of the low pass filter This device prevents the dio...

Page 7: ...ss filter FI 461 to suppress out of band signals The filtered signal is amplified at a 1st IF amplifier Q471 and then applied to a 2nd mixer circuit D491 3 1 5 2ND MIXER AND IF CIRCUITS MAIN UNIT The...

Page 8: ...e filter is selected FI871 which covering the 15 kHz bandwith When the FIL switch is turned 3FOP the filter is selected an optional crystal bandpass filter When the mode is selected SSB mode the filte...

Page 9: ...the buffer amplifier Q1031 to convert the impedance The amplified IF signal is detected at the AGC detector D1061 via the C1061 and enters the base of the AGC amplifier Q1063 to control the voltage on...

Page 10: ...1 on the PLL unit and is applied to the 10 bits DDS IC PLL unit IC201 pin 7 for the clock signal to produce the 455 kHz BFO signal The BFO signal is applied to the D A converter circuit and passes thr...

Page 11: ...the BATT signal from the battery MAIN unit BT1521 is applied to the Q511 and then Q512 is OFF The output signal is applied to the CPU IC101 pin 31 as B5V signal to keep on working the clock function T...

Page 12: ...h Input port for the ANF switch Input port for the NB switch Input port for the AGC switch Input port for the V M switch Pin number 49 50 51 52 53 54 55 56 57 63 77 78 79 80 81 82 83 84 90 91 92 93 94...

Page 13: ...ce 50 k V DC or better EQUIPMENT Oscilloscope AC millivoltmeter External speaker Standard signal generator SSG GRADE AND RANGE Frequency range DC 20 MHz Measuring range 0 01 20 V Measuring range 10 mV...

Page 14: ...z Mode USB Displayed frequency 9 4615 MHz Mode FM Displayed frequency 14 100000 MHz Mode USB Displayed frequency 14 100000 MHz Mode AM PLL PLL PLL PLL PLL PLL Connect the fre quency counter to P1 Conn...

Page 15: ...rence frequency check point P91 1st and 3rd LO voltage check point C76 VCO voltage adjustment L2 Reference frequency adjustment for output frequency is 60 0000 MHz HCP71 VCO voltage check point C86 L5...

Page 16: ...MP1 OFF set an SSG level as OFF Receiving Rear Panel Rear panel Connect the AC milli volt meter to the EXT SP jack with an 8 load Connect an oscillo scope to the EXT SP jack with 8 load Pre set to cen...

Page 17: ...4 kHz IF FILTER2 2 4 kHz Set an SSG as Frequency 14 10150 MHz Level 500 V 54 dB Modulation OFF Set an SSG level as OFF Receiving Rear panel Rear panel Connect the AC milli volt meter to the EXT SP ja...

Page 18: ...CONDITION MEASUREMENT VALUE POINT UNIT LOCATION UNIT ADJUST 1 2 Displayed frequency 14 10000 MHz Mode USB Noise Blanker OFF PREAMP1 ON Set an SSG as Frequency 14 10000 MHz Level 18 V 25 dB Modulation...

Page 19: ...wn PBT SET on the display Then advance to the following setting or push UP key to scroll the display Push SET ANT key to set the PBT level When the PBT level is true shown GOOD on the display When S0...

Page 20: ...V 1 k R149 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R150 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R151 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R152 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R153 7030...

Page 21: ...030008560 S CERAMIC C1608 CH 1H 300J T A C201 4030008630 S CERAMIC C1608 JF 1C 104Z T A C202 4030008630 S CERAMIC C1608 JF 1C 104Z T A C203 4030008630 S CERAMIC C1608 JF 1C 104Z T A C204 4030008630 S...

Page 22: ...0000130 S IC TD62783AF TP1 IC1751 1120002510 S IC DS14C232TM IC1771 1130005720 S IC TC7W04F TE12L IC2001 1110004940 S IC MC13022ADWR3 Q151 1590000680 S TRANSISTOR DTC114EUA T106 Q381 1560000720 S FET...

Page 23: ...NL 322522T 100J L302 6200003020 S COIL NL 322522T R33J 3 L303 6200003010 S COIL NL 322522T R27J 3 L304 6200003020 S COIL NL 322522T R33J 3 L305 6200003030 S COIL NL 322522T R47J 3 L321 6200001830 S CO...

Page 24: ...STOR ERJ3GEYJ 104 V 100 k 5 5 REF ORDER DESCRIPTION NO NO MAIN UNIT R732 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 k R733 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 R734 7030003320 S RESISTOR ERJ3GEYJ 10...

Page 25: ...7 k R1259 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 k R1260 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 R1261 7030003480 S RESISTOR ERJ3GEYJ 222 V 2 2 k REF ORDER DESCRIPTION NO NO MAIN UNIT R1262 703000...

Page 26: ...00 S CERAMIC C1608 JB 1C 104KT N C397 4030011600 S CERAMIC C1608 JB 1C 104KT N 5 7 REF ORDER DESCRIPTION NO NO MAIN UNIT C401 4030011600 S CERAMIC C1608 JB 1C 104KT N C411 4030007080 S CERAMIC C1608 C...

Page 27: ...30006900 S CERAMIC C1608 JB 1E 103K T A C1352 4030006900 S CERAMIC C1608 JB 1E 103K T A C1353 4510004510 ELECTROLYTIC 25 MV 470 HC C1361 4510005860 S ELECTROLYTIC ECEV1HA2R2SR C1362 4030011600 S CERAM...

Page 28: ...J L93 6180002970 S COIL NL 322522T 068J L94 6200001830 S COIL NL 322522T 100J L151 6200003130 S COIL NL 322522T 120J L152 6200003140 S COIL NL 322522T 150J L153 6200001830 S COIL NL 322522T 100J L201...

Page 29: ...ESISTOR ERJ3GEYJ 102 V 1 k R231 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R232 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k REF ORDER DESCRIPTION NO NO PLL UNIT R233 7030003440 S RESISTOR ERJ3GEYJ 102 V 1...

Page 30: ...0 S CERAMIC C1608 JB 1H 472K T A C202 4030006850 S CERAMIC C1608 JB 1H 471K T A C203 4030007120 S CERAMIC C1608 CH 1H 820J T A C204 4030009490 S CERAMIC C1608 JB 1H 821K T A C205 4030007070 S CERAMIC...

Page 31: ...6030 2240 Front cover 1 MP2 8930001770 SP net 1 MP4 8930048740 2240 9 Key 1 MP5 8930048730 2240 6 Key 1 MP6 8930048750 2240 20 Key 1 MP7 8930048710 2240 Brake plate 1 MP9 8930049370 2240 Brake sheet 1...

Page 32: ...1 D MP3 D DS101 D MP2 D DISPLAY UNIT MP24 F W4 F W3 F MP10 C EP2 F MP15 C MP382 M MP442 M MP15 C MP13 C MP13 C MP13 C MP13 C MP20 C J1 C MP19 C MP17 C MP18 C MP3 P MP9 P MP12 P MP16 C MP16 C PLL UNIT...

Page 33: ...K131 MAS Symbol V11 DTA114 EU Symbol 14 DTA144 EU Symbol 16 XP4311 Symbol 3X TRANSISTOR AND FET S B E C E C B E C B D G S D G S 2SC4117 BL Symbol CL B E C B E C B C E C B C E C B E C B E C B E C E1 C2...

Page 34: ...8 1 PHONE AND VR BOARDS SECTION 8 BOARD LAYOUTS R122 R121 C123 C122 C121 L121 VR BOARD R131 R141 J101 J101 to LOGIC board J451 R143 GND GND GND GND GND PB2L PB1L RFGL AFGL 5VL 1 10 PHONE BOARD TOP VI...

Page 35: ...8 2 PHONE BOARD BOTTOM VIEW J121 J101 J101 to LOGIC board J471 GND AFE AFE AFE ESPO ESPO ESPO AFO AFO AFO 10 1...

Page 36: ...8 3 8 2 DISPLAY BOARD TOP VIEW DS11 DS21 DS31 DS41 DS51 DS61 DS71 DS12 DS22 DS32 DS42 DS52 DS62 DS72 DS13 DS23 DS33 DS43 DS53 DS63 DS73 DS81 DS82 DS83...

Page 37: ...4 J101 R11 R21 R31 R41 R51 R61 R71 R81 R12 R22 R32 R42 R52 R62 R72 R82 C101 Q11 Q21 Q31 Q41 Q51 Q61 Q71 Q81 IC101 J101 to LOGIC board J411 14V DIMV COM4 COM2 V1 V3 CL2 M GND GND COM3 COM1 V2 CL1 DO H...

Page 38: ...51 X111 IC101 X112 IC231 C203 C201 C105 C202 R253 R252 R251 R258 R259 R231 C111 C104 C103 R201 R202 R203 R204 R205 R206 C112 C113 C114 C101 C352 IC401 IC351 R381 EP527 EP525 EP523 EP521 EP526 EP524 EP...

Page 39: ...C76 L93 MP2 MP1 C86 J4 J3 MP5 J91 C106 C74 L71 L72 L91 L92 C119 L25 C24 IC23 L22 L27 L24 IC21 L4 L5 L1 J151 MP8 MP11 L153 C215 L203 C165 J1 IC22 L81 Q81 L82 C84 L94 Q71 R75 R85 R116 C124 R79 C83 C78...

Page 40: ...231 L181 L183 L282 L261 L263 L242 D261 Q151 C151 C135 C134 C136 R141 C163 C341 C333 C322 C342 R171 C176 C174 C350 R321 R281 C290 R261 R241 C248 C385 Q383 R386 C433 C432 C435 C436 C434 C230 C269 C246 C...

Page 41: ...55kHz Q3 DTC114EU D1 DAN222 UNLC ULD DULS IC1751 DS14C232TM IC1771 TC7W04F Q1771 2SA1576 R Q1772 2SC4081 R D1771 1SS355 Q1311 2SC4081 R D1311 1SS355 CI V CPU IC401A TC74HC04AF IC401B TC74HC04AF Q401 X...

Page 42: ...5320SI 2 7 R231 100 k C231 0 1 H5VL RFGV AFGV DCK DUD C102 0 1 R223 10 k R224 10 k R225 10 k C221 0 1 R221 470 COM1 COM2 COM3 COM4 V3 V2 V1 V3 V2 V1 R161 47 k W163 W162 W161 R155 1k R153 1k R151 1k R1...

Page 43: ...BL R12 220 R21 330 R22 220 R31 330 R32 220 DS23 TLYE1002 DS33 TLYE1002 Q21 2SC4116 BL Q81 2SC4116 BL DIMV R11 330 DS13 TLYE1002 Q11 2SC4116 BL CL1 V3 V2 V1 GND GND COM1 COM2 COM3 COM4 L2 O STB NT RES...

Page 44: ...Y46 85 Y45 86 Y44 87 Y43 88 Y42 89 Y41 90 Y40 91 Y39 92 Y38 93 Y37 94 Y36 95 Y35 96 Y34 97 Y33 98 Y32 99 IC101 HD66100F H5VL V1 V3 V2 CL1 CL2 DO M C101 0 1 SE15 SE14 SE13 SE12 SE11 SE10 SE1 SE2 SE3 SE...

Page 45: ...P C121 0 1 C125 47 P R115 82 k R80 12 k R116 33 k L94 10 H R117 68 Q97 2SC4117 BL C124 0 1 L83 LW 25 L81 LW 25 L73 LW 25 R72 680 k R73 33 C85 470 P C87 4 P L82 E544GN 110248 Q21 2SC4117 BL R49 1 k R55...

Page 46: ...7 H 14V R8V ATTC ANTC C309 0 1 L305 0 47 H D302 MA77 D322 MA77 L326 0 22 H R321 100 C330 56 P C332 0 01 C331 22 P B7 L301 10 H L302 3 3 H L303 0 27 H C306 180P C308 100P C301 0 1 C302 8 P C303 180 P C...

Page 47: ...D1412 1SS302 C1419 0 1 C1420 10 L1412 330 H D1413 MA8051 M R1414 100 R1416 100 C1421 0 1 C1418 47 H5V 14V 8V H5V 14V 8V 5V FUSE HOLDER F1352 S N5054 01 F1353 S N5054 R1382 2 2 k R1381 47 k Q1381 2SD16...

Page 48: ...0 C1754 10 C1 V C1 C2 C2 V T2O R2I VCC GND T1O R1I R1O T1I T2I R2O 1 2 3 4 5 6 7 8 16 15 14 13 12 10 11 9 5 9 4 8 3 7 2 6 1 IC1751 DS14C232TM SS CIV CIVE IC1771A TC7W04F Q1771 2SA1576 R C1771 0 1 IC17...

Page 49: ...201M S00B C111 1 ANT1 C131 33 P C134 82 P C136 56 P RL141 MZ 12D K L151 330 H Q151 DTC114EU R152 10 k C152 0 1 D141 1SS302 D142 1SS302 R141 2 2 k R142 470 R144 68 R143 330 C141 0 01 C164 0 1 L162 4 7...

Page 50: ...france com Corporate Headquarters 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 425 454 8155 Fax 425 454 1509 URL http www icomamerica com Customer Service Phone 425 454 7619 A C N 006 092 575...

Page 51: ...6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5580I S 1999 by Icom Inc...

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