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Icom IC-M2A, Руководство по обслуживанию

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TABLE OF CONTENTS

SECTION

1

SPECIFICATIONS

SECTION

2

INSIDE VIEWS

SECTION

3

DISASSEMBLY INSTRUCTIONS

SECTION

4

CIRCUIT DESCRIPTION

4-1

RECEIVER CIRCUITS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4-2

TRANSMITTER CIRCUITS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

4-3

PLL CIRCUIT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

4-4

POWER SUPPLY CIRCUITS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

4-5 

CPU PORT ALLOCATIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

SECTION

5

ADJUSTMENT PROCEDURES 

5-1

PREPARATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

5-2

PLL AND TRANSMITTER ADJUSTMENTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

5-3

RECEIVER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5

SECTION

6

PARTS LIST

SECTION

7

MECHANICAL PARTS AND DISASSEMBLY

SECTION

8

SEMI-CONDUCTOR INFORMATION

SECTION

9

BOARD LAYOUTS

9-1

CHARGE UNIT (BC-150)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1

9-2

MAIN UNIT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2

9-3

VR UNIT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4

SECTION

10

BLOCK DIAGRAM

SECTION

11

VOLTAGE DIAGRAM

11-1

MAIN UNIT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1

11-2

VR UNIT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-2

Содержание IC-M2A

Страница 1: ...SERVICE MANUAL VHF MARINE TRANSCEIVER...

Страница 2: ...sses are provided on the inside back cover for your convenience 1 Make sure a problem is internal before disassembling the transceiver 2 DO NOT open the transceiver until the transceiver is disconnect...

Страница 3: ...S 4 3 4 5 CPU PORT ALLOCATIONS 4 4 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 PLL AND TRANSMITTER ADJUSTMENTS 5 4 5 3 RECEIVER ADJUSTMENT 5 5 SECTION 6 PARTS LIST SECTION 7 MECHANICAL PAR...

Страница 4: ...450 MHz Rx 156 025 MHz 163 275 MHz Rx 156 000 MHz 163 425 MHz 16K0G3E FM BP 224 7 2 V DC 20 C to 60 C 4 F to 140 F 15 C to 55 C 5 F to 131 F 10 ppm 1 5 kHz 1 5 A 1 2 A 0 7 A 0 6 A FRG only 200 mA 20...

Страница 5: ...075 156 125 156 125 156 175 156 175 156 225 156 225 156 275 156 275 156 325 156 325 156 375 156 425 156 475 Rx only 156 575 156 625 Receive 157 050 161 700 157 100 161 750 157 150 161 800 161 850 161...

Страница 6: ...157 150 157 150 157 200 157 250 157 300 157 350 157 400 157 850 156 025 156 075 156 075 156 125 156 175 156 175 156 225 156 225 156 275 156 275 156 325 156 325 156 375 156 425 156 475 Rx only 156 575...

Страница 7: ...2125F IF amplifier Q151 2SC2714 Y TX RX switch D50 D51 MA77 Antenna switching circuit D90 1SV307 D91 1SS375 1st mixer Q150 3SK272 VCO circuit IF DETECTOR IC IC170 TA31136FN PLL IC IC1 PD3140GS D A con...

Страница 8: ...1 screw A 2 x 10 mm and remove 1 washer B Unscrew 3 screws C 2 x 8 mm Remove the rear panel and rubber from the front panel Unscrew 1 nut D Unscrew 2 screws E 2 x 6 mm Take off the chassis unit in th...

Страница 9: ...e signal is then mixed with a 2nd LO signal for conversion into a 450 kHz 2nd IF signal IC170 contains the 2nd mixer limiter amplifier quadrature detector and active filter circuits A 21 25 MHz 2nd LO...

Страница 10: ...signal at the VCO circuit Q21 Q22 D22 D23 The oscillated signal is amplified at the buffer amplifiers Q23 Q24 4 2 3 DRIVE POWER AMPLIFIER CIRCUITS MAIN UNIT The signal from the VCO circuit passes thr...

Страница 11: ...a the TX RX switching diode D50 D51 Shift register Prescaler Phase detector Loop filter Programmable counter Programmable divider X1 21 25 MHz 2nd LO signal 21 25 MHz to the FM IF IC IC170 Q21 Q22 D22...

Страница 12: ...Low While H L key is pushed Input port for the SQL key Low While SQL key is pushed Input port for the Y key Low While Y key is pushed Pin number 54 55 56 57 58 83 84 85 86 88 91 93 94 95 Port name DOW...

Страница 13: ...AND RANGE Output voltage 7 5 V DC Current capacity 3 A or more Measuring range 0 1 10 W Frequency range 100 300 MHz Impedance 50 SWR Less than 1 2 1 Frequency range 0 1 300 MHz Frequency accuracy 1 pp...

Страница 14: ...k SINAD meter Speaker 8 OPC 782 Optional plug adapter cable DETACHING ATTACHING THE TOP PANEL Detach the TOP PANEL with a sharp point such as tweezers for adjustment BE CAREFUL cracking the TOP PANEL...

Страница 15: ...l ch16 Set an SSG as Frequency 156 8 MHz ch 16 Level 3 2 V 97 dBm Modulation 1 kHz Deviation 3 5 kHz Receiving MAIN Top Panel Connect a digital multi meter or oscil loscope to the check point CP1 Conn...

Страница 16: ...ENCY Fr OUTPUT POWER Po H Hi Po M Mid Po L Low Po ML Extra Low FM DEVIATION dE SQUELCH LEVEL nL S METER SL Top Panel Top panel Top panel Top panel Top panel Loosely couple the frequency counter to the...

Страница 17: ...5 6200006980 S COIL ELJRE R10G F L49 6200005740 S COIL ELJRE 47NG F L50 6200006980 S COIL ELJRE R10G F L51 6200007000 S COIL ELJRE 82NG F L52 6200010230 S COIL EXCCL3216U1 L53 6200002330 S COIL LQN 1A...

Страница 18: ...R ERJ3GEYJ 151 V 150 R241 7030003430 S RESISTOR ERJ3GEYJ 821 V 820 R242 7030003430 S RESISTOR ERJ3GEYJ 821 V 820 REF ORDER DESCRIPTION NO NO MAIN UNIT R245 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 k R25...

Страница 19: ...A C109 4030006850 S CERAMIC C1608 JB 1H 471K T A 6 3 REF ORDER DESCRIPTION NO NO MAIN UNIT C110 4030006860 S CERAMIC C1608 JB 1H 102K T A C115 4030006860 S CERAMIC C1608 JB 1H 102K T A M21 only C120...

Страница 20: ...ERAMIC C1608 JB 1H 333K T A C368 4030008920 S CERAMIC C1608 JB 1H 473K T A C370 4030007040 S CERAMIC C1608 CH 1H 180J T A C371 4030007050 S CERAMIC C1608 CH 1H 220J T A C372 4030011600 S CERAMIC C1608...

Страница 21: ...056890 2497 A terminal 1 MP35 8930056900 2497 B terminal 1 MP36 8810008640 Screw B0 2 x 4 NI ZU BT 2 MP37 8930056910 2497 C terminal 1 MP38 8810009510 Screw B0 2 x 4 NI ZU BT 1 MP39 8810009510 Screw B...

Страница 22: ...CHASSIS PARTS M MAIN UNIT V VR UNIT NOTE1 Once the following parts are removed a O ring or sealing must be replaced with new one before reattachement Mother part Daughter part for relayted replacemen...

Страница 23: ...8930047830 Leg cushion C 2 CHASSIS REF NO ORDER NO DESCRIPTION R1 7070001130 RESISTOR 120 ERG2SJ R2 7070001140 RESISTOR 150 ERG2SJ R3 7010007100 RESISTOR 1K PSD1 4V J1 6510023070 CONNECTOR HEC2305 01...

Страница 24: ...XP6401 Symbol 5O G S D S D G top view S B E C B E C B E C E1 B1 B2 C1 C2 G1 G2 S D 2SA1588 GR Symbol ZG 2SB1132 Q Symbol BAQ 2SC2714 Y Symbol QY 2SC4081 R Symbol BR 2SC4213 B Symbol AB B E C B C E B...

Страница 25: ...SECTION 9 BOARD LAYOUTS 9 1 CHARGE UNIT BC 150 TOP VIEW BOTTOM VIEW 9 1 DS1 R3 J1 R2 R1 B5787B MP2 MP1...

Страница 26: ...DS241 C48 C44 C49 R56 C51 R55 CP353 Q50 L50 C55 R71 L49 C52 R54 L52 R120 C122 L120 D50 R221 C221 R223 R224 Q222 IC50 R66 C56 C60 R68 C58 R67 R59 C57 R58 R62 Q52 R231 R230 R225 R282 C233 CP250 R235 IC2...

Страница 27: ...R345 R303 R307 R315 B5714E IC360 R341 CP350 C3 R2 C350 C170 C251 S250 C289 C288 C229 C98 R90 C97 L91 C95 L94 D91 CP80 R115 R80 D90 L81 C91 C90 C104 D93 R95 C136 C101 R132 C135 C130 C110 C131 R130 L13...

Страница 28: ...9 4 9 3 VR UNIT TOP VIEW R500 B5715A to the MAIN unit J240 VCC VCC NC VOLIN VOLO GND BOTTOM VIEW...

Страница 29: ...0 TC4W66F ANALOG SW LPF IC200C NJM2902V BEPO AF MUTE SW DE ENPHA MIC AMP IC200B NJM2902V R286 10 k C285 0 1 AFVS Q280 2SC4213 B IVOLM AF AMP AF REG PRE ENPHA R253 2 2 k C254 0 01 Q230 2SB1132 Q Q231 X...

Страница 30: ...4 7 k CP250 C252 0 001 R252 33 k UP S320 S323 CHWX SQL SCAN DOWN 16CH S321 S322 S324 S325 S326 DW HL S327 R201 15 k R203 1 2 M R207 27 k C202 0 1 R206 18 k R377 82 k R378 82 k R379 82 k A0 A1 A2 VSS 8...

Страница 31: ...P C7 0 01 C8 2 P C9 2 P C12 0 001 C5 12 P R6 1 k C6 0 001 R20 100 C20 0 001 C21 9 P C10 0 047 X170 CDBCB450KCAY24 C174 0 001 R171 1 2 k C160 0 0056 R155 1 5 k R156 470 C155 6 P R154 100 k C158 0 001...

Страница 32: ...242 SML 311YTT86 DS243 SML 311YTT86 BATTV LEDL LEDK AFVS 6 5 4 1 2 3 R60 1 k R61 0 15 R62 100 k R63 10 k C61 33 C62 0 001 C63 470 P C67 470 P L55 31 nH MP50 R75 100 R71 100 C70 91 P C71 27 P C81 15 P...

Страница 33: ...k ATIS8 ATIS7 ATIS6 ATIS5 ATIS4 ATIS3 ATIS2 ATIS1 R302 20 k DETM DETM MICM AFOUT R304 20 k SPO SPO J251 BM02B ASRS TF 1 2 GND R306 20 k R308 20 k D350 DA204U Q350 DTC144TU R353 1 k CPU5V R351 1 k R310...

Страница 34: ...11 2 11 2 VR UNIT CP506 1 2 3 4 5 6 CP505 CP504 CP503 CP502 CP501 CP500 GND VOLO VOLIN NC VCC VCC R500 B 5715A VCC HV From BATTERY...

Страница 35: ......

Страница 36: ......

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