Icom IC-M220 Service Manual Download Page 28

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SECTION 8

BLOCK DIAGRAM

8-1

RF OUT

DET

TX MUTE

CTRL

Q13

D12,D13

IC2

D601

REVERSE

CONNECT

PROTECT

INT SP

D14,D15

PTT

MIC

D11,Q17

CTRL

Q10,Q11

IC512

NMEAI+

NMEAI-

IC552,D551

PHOTO

COUPLER

NMEAI+

NMEAI-

Q511,Q512

NMEAO+

EXT SP+

REG

IC506

EVOL

T5V

3.3V

VCC

Q16

IC511

AFVOLO

AFVOLI

NMEAI

BUFF

NMEAO

BUFF

IC551

IC701

D16

Q14

IC703

Frequency range(USA)

TX:156.025MHz~157.425MHz

RX:156.050MHz~163.275MHz

EXT SP-

IC504A

Q1,Q2,D1

DS2~DS9

IC1

DSCENC

IC14

IC4,D11

IC2B

KEY

BOARD

L3V

PWM

DIM

CTRL

A/D

IC9

RESET

DSC SW

L3V

IC5A/B,Q3,Q4,D3

IC2A

L3V

LCD

MODULE

L3V

IC10

A/D

ICF3

EEPROM

LCD

IC3

REG

3.3V

L3V

DS1

IC5C

DISTRIBUTOR

NMEAO-

IC702

L3V

IC504B

IC201

MAIN-Lo Frequency range(USA)

TX:156.025MHz~157.425MHz

3.3V

TCXO

26.0MHz

HV(LOGIC)

Audio filter

Sub CH filter

FM modem

AFC loop

LNA

VCO

PGA

RSSI

PGA

DAC

Synthesizer

DSP

Core

driver

ADC

LDO

ADC

0/90

ADC

PGA

DAC

LDO

ADC

Synthesizer

ADC

0/90

PGA

RSSI

ADC

LNA

VCO

VCC

Q201,Q202

R5V

CTRL

R5V

IC504D

3.3V

BUFF

Q12

Q101

IC505

IC301

PTT

CLONE

MIC

MICG

PTT

EXT SP-

EXT SP+

NMEAI+

NMEAO+

NMEAO-

NMEAI-

IC302

GPS

Engin

GPS

Antenna

SAW

Filter

L3V

FI201

EP2

Q18,Q19

BIAS

CTRL

IC201

PWR

CTRL

BPF

PWR

CTRL

AMP

LPF

ANT

YGR

AMP

PWR

AMP

APC

CTRL

LPF

MUTE

CI-V

I/F

BUFF

PRE

AMP

MUTE

LPF

ATT

REG

MUTE

AMP

PRE

DRIVE

AMP

MIC

AMP

ATT

ANT

SP1

7.9872MHz

EP1

EP3

EP4

EP2

HL/ATT

TDETV

IMICS

DSCDEC

DTEST

BEEP

WXDEC

DSCO

AFINM

DSCS

T5VS0

MICIN

BEEPO

PONO

TXMSO

RXON

MAIN DET

DSCDEC

WXDEC

MICIN

HL/ATT

PCON

HL/ATT

MAIN UNIT

JACK UNIT

HM-237

FRONT UNIT

For only IC-M220G

CPU

Audio filter

Sub CH filter

FM modem

AFC loop

DSP

Core

CHASSIS UNIT

GPS ANT

UNIT

Explanatory notes

COMMON Line

RX Line

TX Line

Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (5V)
Voltage Line (3.3V)

DATA Line

Summary of Contents for IC-M220

Page 1: ...SERVICE MANUAL S 15506XZ C1 October 2018 VHF MARINE TRANSCEIVERS M220 M220G ...

Page 2: ...220 MAIN UNIT 5 pieces 8930100330 4048 IC CLIP IC M220 CHASSIS 1 piece Addresses are provided on the inside back cover for your convenience REPAIR NOTES 1 Make sure that the 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 short any circuits or electronic parts 4 DO NOT keep power ON for a lo...

Page 3: ...NSTRUCTIONS SECTION 4 ADJUSTMENT PROCEDURE 4 1 PREPARATION 4 1 4 2 FREQUENCY ADJUSTMENTS 4 3 4 3 RECEIVE ADJUSTMENTS 4 3 4 4 TRANSMIT ADJUSTMENTS 4 5 SECTION 5 PARTS LIST SECTION 6 MECANICAL PARTS SECTION 7 BOARD LAYOUTS SECTION 8 BLOCK DIAGRAM SECTION 9 VOLTAGE DIAGRAM DISTRIBUTORS ADDRESS ...

Page 4: ...e than 40 dB Audio frequency response 1 3 dB of 6 dB octave from 500 2500 Hz Input impedance Microphone 2 kΩ M Receiver Sensitivity Transceiver 13 dBμ typical at 12 dB SINAD DSC receiver 5 dBμ emf typical at 1 BER Squelch sensitivity Less than 10 dBμ Adjacent channel selectivity Transceiver More than 68 dB DSC receiver More than 68 dBμ emf at 1 BER Intermodulation Transceiver More than 63 dB DSC r...

Page 5: ...IER Q14 Inside the shielded case YGR AMPLIFIER Q12 MICROPHONE AMPLIFIER IC505 26 0 MHz REFERENCE OSCILLATOR X2 ELECTRIC VOLUME IC506 NMEA BUFFER IC551 PHOTO COUPLER IC552 POWER CONTROL Q511 DIRECT CONVERSION IC IC301 DIRECT CONVERSION IC IC201 Inside the shielded case RF AMPLIFIER Q101 PER AMPLIFIER IC702 J2 AF MUTE IC703 APC CONTROL IC2 BANDPASS FILTER D16 POWER CONTROL Q17 BIAS CONTROL Q19 ...

Page 6: ...C UNIT BOTTOM VIEW 3 3 V REGULATOR IC4 7 9872 MHz SYSTEM CLOCK X1 LCD DS1 EEPROM IC9 NMEA BUFFER IC5 J5 J4 J2 J1 CPU IC1 DSC SWITCH IC3 GPS RECEIVER IC IC201 GPS ANT BOARD MIC JACK BOARD Available only with the IC M220G LOGIC UNIT ...

Page 7: ...UNIT Flat cable Case Case UNSOLDER Solder remover J2 Front panel Speaker cables Flat cable LOGIC UNIT Front panel LOGIC UNIT Screws 5 Earth spring Case J1 Screws 4 Front panel Front panel LOGIC UNIT Flat cable Case Case UNSOLDER Solder remover J2 Front panel Speaker cables Flat cable LOGIC UNIT Front panel LOGIC UNIT Screws 5 Earth spring Case J1 Screws 4 Front panel Front panel LOGIC UNIT Flat ca...

Page 8: ...is UNSOLDER Solder remover MAIN UNIT MAIN UNIT MAIN UNIT Antenna conector Jumper wire Chassis IC clip Data cable Chassis Screws 6 UNSOLDER Solder remover Screws 4 Case Case Chassis 5 Remove the 6 screws and then remove the MAIN UNIT from the chassis 3 Unsolder the 2 points of the DC power cables and disconnect the data cable from the MAIN UNIT 2 Separate the chassis from the case J2 DC power cable...

Page 9: ...cilloscope Frequency range DC 20 MHz Measuring range 0 01 20 V Attenuator Power attenuation 40 dB Capacity More than 30 W Audio generator AG Frequency range 300 3000 Hz Output level 1 500 mV External speaker Input impedance 4 Ω Capacity More than 10 W Spectrum analyzer Measuring range Up to 3 GHz Distortion meter Measuring accuracy 3 or less at 1 kHz Input level 50 mV to 20 V Bit error meter Input...

Page 10: ...N DSC MODULATION SENSITIVITY SQUELCH AC MILLIVOLTMETER 10 mV to 10 V AUDIO GENERATOR 300 3000 Hz 1 500 mV 3 conductor 3 5 d mm jack MIC PTT CLONE GMD OPC 2132 PTT Cut the cable and make the proper connections according to the diagram Brown White Red Blue ...

Page 11: ...eshold 1 Operating channel 16 Receiving Set the SSG to Level 13 5 dBµ 120 5 dBm RSSI Threshold Push Enter Automatic adjustment Tight 2 Set the SSG to Level 3 5 dBµ 110 5 dBm RSSI Tight Verification 3 Operating channel 16 SQL 10 Receiving Set the SSG to Level 0 dBµ 107 dBm Squelch open AUDIO OUTPUT Verification Distortion 1 Operating channel 16 Audio output level 19 Receiving Set the SSG to Level 6...

Page 12: ...ion 1 3 kHz 2 6 kHz 2 1 kHz 4 2 kHz Signal 50 Duty or PN9 Modulation rate 1200 bps Level 0 dBµ 107 dBm emf Connect DATA terminal of the bit error meter to NMEAO white and NMEAO brown lines of the NMEA out leads and CLOCK terminal of the SSG to CLOCK terminal of the bit error meter Less than 1 Selected by the SSG installed function 4 3 RECEIVE ADJUSTMENTS CONTINUED 1 Select an adjustment item by pu...

Page 13: ...R CONSUMPTION Verification High power 1 Operating channel 16 Output power level High Maximum LCD brightness Transmitting Connect the ammeter between the power cable of the transceiver and the DC power supply Less than 4 5 A Low power 2 Operating channel 16 Output power level Low Maximum LCD brightness Transmitting Less than 1 2 A High power Band low 3 Operating channel 01 Output power level High M...

Page 14: ...0Hz 4 2 kHz 10 MODULATION SENSITIVITY Verification 1 Operating channel 16 Transmitting Set the audio generator to Level 28 mV rms MSENS INT 2 7 3 3 kHz TX SIGNAL TO NOISE RATIO Verification 1 Operating channel 16 Transmitting Connect the modulation analyzer to the antenna connector through the attenuator and set it to HPF OFF LPF 20 kHz De emphasis OFF Detector P P 2 Connect the AC millivoltmeter ...

Page 15: ...H 22 k B 15 4 30 6 R750 7030016470 S RES RMC1 16S 390JTH 39 T 6 8 37 1 R751 7030015920 S RES RMC1 16S 221JTH 220 T 10 0 35 6 R752 7030017480 S RES RMC1 16 2R2JTP 2 2 T 18 8 34 0 R753 7030016640 S RES RMC1 16S 1R0JTH 1 B 21 3 43 2 R801 7030016640 S RES RMC1 16S 1R0JTH 1 T 24 9 2 1 C11 4030023090 S CER 0402B102K500CT T 53 7 18 1 C12 4030023090 S CER 0402B102K500CT T 52 9 23 0 C13 4550007260 S TAN F9...

Page 16: ... T 81 0 12 0 C249 4550007260 S TAN F931C475MAABMA B 76 9 27 1 C250 4550007260 S TAN F931C475MAABMA T 96 8 15 3 C251 4030023030 S CER 0402B103K250CT T 55 8 20 8 C252 4030025230 S CER TMK107BJ105KAHT T 55 5 22 6 C253 4550007520 S TAN F931A106MAABMA T 60 5 12 6 C254 4030022940 S CER 0402B104K100CT T 59 3 14 2 C255 4030022940 S CER 0402B104K100CT T 62 8 18 0 C256 4030022940 S CER 0402B104K100CT T 63 7...

Page 17: ...20 S RES RMC1 16S 104JTH 100 k B 51 9 13 7 R31 7030015970 S RES RMC1 16S 103JTH 10 k B 34 0 51 8 R32 7030015910 S RES RMC1 16S 101JTH 100 B 83 0 20 1 R33 7030016560 S RES RMC1 16SJPTH B 64 6 25 5 R34 7030015910 S RES RMC1 16S 101JTH 100 B 64 2 23 5 R39 7030016560 S RES RMC1 16SJPTH B 52 7 9 6 R40 7030016060 S RES RMC1 16S 105JTH 1 M B 102 9 41 1 R41 7030020560 S RES RMC1 2 270JTE 27 B 96 2 39 4 R4...

Page 18: ...3090 S CER 0402B102K500CT B 50 8 7 1 C86 4030023090 S CER 0402B102K500CT B 91 1 27 6 C87 4030025230 S CER TMK107BJ105KAHT B 91 4 25 8 C88 4550007260 S TAN F931C475MAABMA B 87 0 30 7 C89 4030023030 S CER 0402B103K250CT B 88 1 20 8 C90 4030025230 S CER TMK107BJ105KAHT B 88 1 19 7 C91 4510009810 S ELE EEEFK1E220R B 93 4 20 3 C92 4030022940 S CER 0402B104K100CT B 76 0 35 4 C93 4030023090 S CER 0402B10...

Page 19: ...ted on the Bottom side H V LOCATION See the BOARD LAYOUTS for details REF NO PARTS NO DESCRIPTION M H V LOCATION 5 5 GPS ANT UNIT for only IC M220G L1 6200015480 S COI MLG1005S 2N4C T T 12 2 18 8 C1 4030022520 S CER 0402N1R0B500CT T 16 7 14 1 C2 4030022610 S CER 0402N0R3B500CT T 17 1 12 9 W1 7030014290 JUM RJ25S0OHM EP2 3310004650 S ANT ANT016008LCD1575MA1 T 17 1 18 8 ...

Page 20: ...SPONGE EI 2 SECTION 6 MECANICAL PARTS FRONT UNIT REF NO PARTS NO DESCRIPTION QTY MP1 8210033830 4048 FRONT PANEL ASSEMBLY 1 SP1 2510002160 036D01209 1 W1 9035700010 22 00 030 W02 W02 2 MP3 8110011420 3974 DISTRESS COVER 1 MP4 8930098310 3974 SHAFT 1 MP5 8930098320 3974 SPRING 1 MP7 8930100130 4048 KEYBOARD SC 1 MP8 8930055842 2490 EARTH SPRING 2 1 MP9 8930100090 4048 MIC HOLDER 1 MP10 8930100260 4...

Page 21: ...30098300 MP16 CHASSIS 8930060440 MP21 CHASSIS 6 8810008661 MP22 CHASSIS 8810010610 MP23 CHASSIS 4 8810010610 MP24 CHASSIS 4 8810010620 MP3 MAIN 8510016461 MP7 MAIN 8510022650 MP8 MAIN 8930097540 MP1 FRONT 8210033830 SP1 FRONT 2510002160 W1 FRONT 9035700010 MP3 FRONT 8110011420 MP4 FRONT 8930098310 MP5 FRONT 8930098320 MP7 FRONT 8930100130 MP8 FRONT 8930055842 MP9 FRONT 8930100090 MP10 FRONT 893010...

Page 22: ... C604 C603 C602 C566 C565 C564 C562 C555 C519 C518 C517 C516 C515 C514 C513 C512 C511 C510 C509 C508 C502 C501 C500 C352 C351 C341 C333 C332 C314 C313 C312 C256 C255 C254 C251 C241 C233 C232 C228 C214 C213 C212 C145 C144 C143 C142 C141 C140 C123 C122 C98 C95 C94 C93 C69 C68 C67 C55 C54 C52 C51 C47 C46 C42 C41 C31 C30 C28 C27 C25 C24 C21 C12 C11 X2 R752 R342 R341 R323 R223 R44 Q512 Q511 Q18 Q14 Q13...

Page 23: ...R104 R103 R102 R101 R100 R99 R86 R85 R84 R83 R82 R81 R80 R79 R78 R35 EP701 C773 C771 C750 C745 C743 C742 C741 C737 C738 C732 C627 C626 C625 C624 C623 C563 C561 C311 C211 C154 C153 C151 C150 C149 C148 C147 C146 C139 C138 C137 C136 C135 C134 C133 C132 C131 C130 C129 C128 C127 C126 C125 C124 C120 C92 C91 C48 R561 R75 Q202 Q201 Q101 Q19 Q17 Q16 L112 L111 L108 L107 L106 J2 IC702 IC703 IC2 D16 D11 C764 ...

Page 24: ... together See the PARTS LIST H V location on the PARTS LIST for location details 7 3 DS1 DS9 DS8 DS7 DS6 DS5 DS4 DS3 DS2 H0 H5 H10 H15 H20 H25 H30 H35 H40 H45 H50 H55 H60 H65 H70 H75 H80 H85 H90 H95 H100 H105 H110 H115 H120 H125 V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 LOGIC UNIT B 8867C TOP VIEW ...

Page 25: ...5 C24 C18 C17 C16 C15 C14 C13 C12 C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 X1 R87 R68 R67 R54 R52 R41 R23 R18 R16 Q4 Q3 Q2 Q1 J5 J4 J2 J1 IC201 IC14 IC10 IC9 IC5 IC4 IC3 IC2 IC1 FI201 EP201 EP8 D11 D3 D1 C207 C112 C91 C90 C88 C87 C73 C72 C26 C23 C22 C21 C20 H0 H5 H10 H15 H20 H25 H30 H35 H40 H45 H50 H55 H60 H65 H70 H75 H80 H85 H90 H95 H100 H105 H110 H115 H120 H125 V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V5...

Page 26: ...BOARD LAYOUT pages together See the PARTS LIST H V location on the PARTS LIST for location details 7 5 MIC JACK UNIT B 8868C TOP VIEW GPS ANT UNIT B 8258 for only IC M220G TOP VIEW W1 B8258 L1 C2 C1 EP2 H0 H5 H10 H15 H20 H25 H30 V0 V5 V10 V15 V20 B8868C J2 H0 H5 H10 V0 V5 V10 V15 V20 ...

Page 27: ...her See the PARTS LIST H V location on the PARTS LIST for location details 7 6 MIC JACK UNIT B 8868C BOTTOM VIEW GPS ANT UNIT B 8258 for only IC M220G BOTTOM VIEW J1 H0 H5 H10 V0 V5 V10 V15 V20 J1 GND GND MICG MIC PTT CLONE J2 MICROPHONE JACK MIC PTT CLONE MICG J1 H0 H5 H10 H15 H20 H25 H30 V0 V5 V10 V15 V20 ...

Page 28: ...er FM modem AFC loop LNA VCO PGA RSSI PGA DAC Synthesizer DSP Core RA driver RA driver ADC LDO ADC 0 90 ADC PGA DAC LDO ADC Synthesizer ADC 0 90 PGA RSSI ADC LNA VCO VCC HV Q201 Q202 R5V R5 CTRL R5V 5V IC504D 3 3V 3 3V BUFF Q12 Q101 IC505 IC301 PTT CLONE MIC MICG PTT EXT SP EXT SP NMEAI NMEAO NMEAO NMEAI IC302 GPS Engin GPS Antenna SAW Filter L3V FI201 EP2 Q18 Q19 BIAS CTRL IC201 PWR CTRL BPF PWR ...

Page 29: ...2775 MP1 1 2 3 4 2775 MP2 1 2 3 4 1k R528 NJU7056F3 IC505 1 2 3 4 5 100k R515 22P C824 470k R744 0 R601 0 001 C41 10k R47 U2429G IC506 1 VIN1 2 VOUT1 3 GND 4 DATA 5 CLOCK 6 VCC 7 VOUT2 8 VIN2 22k R502 22k R503 10k R504 AFT05MS031NR1 Q14 0 01 C352 0 001 C25 0 001 C12 UTRS485G IC551 1 RO 2 RE 3 DE 4 DI 5 GND 6 A 7 B 8 VCC 0 01 C564 L1SS400 D551 0 001 C631 CP10S CP14 CP10S CP11 CP10S CP13 CP10S CP12 ...

Page 30: ...VREF 21 VREF 22 VDDA 23 PA0 WKUP 24 PA1 25 PA2 26 PA3 27 VSS_4 28 VDD_4 29 PA4 30 PA5 31 PA6 32 PA7 33 PC4 34 PC5 35 PB0 36 PB1 37 PB2 38 PE7 39 PE8 40 PE9 41 PE10 42 PE11 43 PE12 44 PE13 45 PE14 46 PE15 47 PB10 48 PB11 49 VSS_1 50 VDD_1 51 PB12 52 PB13 53 PB14 54 PB15 55 PD8 56 PD9 57 PD10 58 PD11 59 PD12 60 PD13 61 PD14 62 PD15 63 PC6 64 PC7 65 PC8 66 PC9 67 PA8 68 PA9 69 PA10 70 PA11 71 PA12 72...

Page 31: ...Explanatory notes TX Line J2 J1 1 2 3 4 5 6 MICG MIC PTT CLONE 1P C1 ANT016008LCD1575MA1 EP2 1 GPS 3 FEED 2 2 4GHz 4 FEED RF OUT CP1 2 4N L1 0 3P C2 9 3 MIC JACK UNIT GPS ANT UNIT for only IC M220G ...

Page 32: ... 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 3168 Australia Phone 61 03 9549 7500 Fax 61 03 9549 7505 URL http www icom net au E mail sales icom net au No 101 Building 9 Caifuxingyuan Park No 188 Maoting Road Chedun Town Songjiang District Shanghai 201611 China Phone 8...

Page 33: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 15506XZ C1 2018 Icom Inc ...

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