SERVICE MANUAL

VHF MARINE TRANSCEIVER
6-9-16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan
S-13611IZ-CD 2000 Icom Inc.

INTRODUCTION

This service manual describes the latest service information for the IC-M45/IC-M45EURO VHF MARINE TRANSCEIVER at the time of publication. 2 versions of the IC-M45/IC-M45EURO have been designed. This service manual covers each version.
MODEL IC-M45 IC-M45EURO VERSION U.S.A. U.S.A.-1 ITA FRA COLOR U-Black U-White E-White E-Black SYNBOL USA EUR

DANGER

NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V. This will ruin the transceiver. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the transceiver. DO NOT apply an RF signal of more than 20 dBm (100mW) to the antenna connector. This could damage the transceiver's front end.

ORDERING PARTS

Be sure to include the following four points when ordering replacement parts: 1. 10-digit order numbers 2. Component part number and name 3. Equipment model name and unit name 4. Quantity required <SAMPLE ORDER>
1110003490 S.IC TA31136FN IC-M45 MAIN UNIT 5 pieces 8810008660 Screw PH BO M3x8 NI IC-M45 Chassis 10 pieces

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. An insulated turning tool MUST be used for all adjustments. 5. DO NOT keep power ON for a long time when the transceiver is defective. 6. DO NOT transmit power into a signal generator or a sweep generator. 7. ALWAYS connect a 40 dB to 50 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver.
6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan Phone : 5302 Fax : 0013
< 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
Communication Equipment Himmelgeister Str. 100, D-40225 Dsseldorf, Germany Phone : Fax : URL : http://www.icomeurope.com
3071 #5 Road, Unit 9, Richmond, B.C., V6X 2T4, Canada Phone : (604) 273-7400 Fax : (604) 273-1900 URL : http://www.icomcanada.com
Crta. de Gracia a Manresa Km. 14,Sant Cugat del Valles Barcelona, SPAIN Phone : (93) 70 Fax : (93) 46 URL : http://www.icomspain.com
Addresses are provided on the inside back cover for your convenience.
A.C.N. 575 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Phone : 0666 Fax : 0022 URL : http://www.icom.net.au
Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : Fax : URL : http://www.icomuk.co.uk
6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C. Phone : (02) Fax : (02) 2559 1874

Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, France Phone : Fax : URL : http://www.icom-france.com

TABLE OF CONTENTS

SECTION

SPECIFICATIONS

VHF MARINE CHANNEL LIST.1-2

SECTION SECTION

3-1 3-2 3-3 3-4 3-5
DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPTION
RECEIVER CIRCUITS.3-1 TRANSMITTER CIRCUITS.3-2 PLL CIRCUITS.3-3
POWER SUPPLY CIRCUITS.3-3 PORT ALLOCATIONS.3-4

4-1 4-2 4-3 4-4

ADJUSTMENT PROCEDURES
PREPARATION.4-1 PLL ADJUSTMENTS.4-2 TRANSMITTER ADJUSTMENTS.4-2 RECEIVER ADJUSTMENT.4-2
SECTION SECTION SECTION SECTION

8-1 8-2

PARTS LIST MECHANICAL PARTS AND DISASSEMBLY SEMI-CONDUCTOR INFORMATION BOARD LAYOUTS
LOGIC, VR-A AND VR-B UNITS.8-1 MAIN UNIT.8-3

BLOCK DIAGRAM

10 VOLTAGE DIAGRAM
10-1 10-2 10-3 LOGIC UNIT.10-1 MAIN UNIT.10-2 VR-A AND VR-B UNITS.10-3

SECTION 1

GENERAL
Frequency coverage Mode Usable channels
: 156.025157.425 MHz (Tx) 156.025163.275 MHz (Rx) : 16K0G3E (FM) : Model IC-M45 IC-M45EURO Version [USA] [USA-1] [ITA] [FRA] INT Channel USA CAN WX
Power supply requirement Usable temperature range Frequency stability Current drain (at 13.8 V DC) Antenna impedance Dimensions (projections not included) Weight
: 13.8 V DC 15% (negative ground) : 20C to +60C; 4F to +140F : 10 ppm (20C to +60C; 4F to +140F) : Transmit Receive at 25 W max. audio 6.0 A 1.2 A
: 50 (nominal) : 152(W)67(H)144(D) mm; 6(W)258(H)523(D) in : 900 g; 2 lb

TRANSMITTER

Output power (at 13.8 V DC) Modulation Maximum frequency deviation Spurious emissions Adjacent channel power Residual modulation Audio harmonic distortion Audio frequency response : High Low : 5.0 kHz : 70 dB : 60 dB : 40 dB : Less than 10% at 70% deviation : +1 dB to 3 dB of 6 dB octave from 300 Hz to 3000 Hz 25 W 1W
: Variable reactance frequency modulation

RECEIVER

Receive system Intermediate frequencies Sensitivity Squelch sensitivity Adjacent channel selectivity Spurious response Intermodulation rejection ratio Hum and noise Audio output power (at 13.8 V DC) Audio frequency responce : Double conversion superheterodyne system : 1st 2nd 30.85 MHz 450 kHz

REMOVING THE MAIN UNIT
1 Unsolder DC cable (2 points) and antenna connector, B (3 points), as shown below. 2 Unscrew 2 screws, C, and 7 screws, D, to remove the MAIN unit.
1 Unscrew the 4 screws, A. Note: When replacing the screw, 1012 kg of torque MUST be applied to ensure water resistance.
2 Slide the case free of the chassis in the direction of the arrow.

SECTION 3

CIRCUIT DESCRIPTION
3-1-4 2ND IF AND DEMODULATOR CIRCUITS
The 2nd mixer circuit converts the 1st IF signal to a 2nd IF signal. A double superheterodyne system (which converts receive signals twice) improves the image rejection ratio and obtains stable receiver gain. The FM IF IC (IC1) contains the 2nd local oscillator, 2nd mixer, limiter amplifier, quadrature detector, and noise detector circuits, etc. The 1st IF signal from Q3 is applied to the 2nd mixer section of IC1 (pin 16), and is mixed with a 30.4 MHz 2nd LO signal generated at the PLL circuit by doubling the reference frequency (15.2 MHz) to produce a 450 kHz 2nd IF signal. The 2nd IF signal from IC1 (pin 3) is passed through the ceramic filter (FI2), where unwanted signals are suppressed, and is then applied to the 2nd IF and limiter amplifiers in IC1 (pin 5). The signal is applied to the FM detector section in IC1 for demodulation into AF signals. The FM detector circuit employs a quadrature detection method (linear phase detection), which uses a ceramic discriminator (X2) for phase delay to obtain a non-adjusting circuit. The detected signal from IC1 (pin 9) is applied to the AF circuit.

3-1 RECEIVER CIRCUITS

3-1-1 ANTENNA SWITCHING CIRCUIT
The antenna switching circuit functions as a low-pass filter while receiving and as resonator circuit while transmitting. The circuit does not allow transmit signals to enter receiver circuits. Received signals enter the MAIN unit from the antenna connector and pass through the low-pass filter (L1L3, C1C5, C7). The signals are then applied to the RF circuit via the antenna switching circuit (D1, L4, L25).

3-1-2 RF CIRCUIT

The RF circuit amplifies signals within the range of frequency coverage and filters out-of-band signals. The signals from the antenna switching circuit pass through a tunable bandpass filter (D2, L5) where the object signals are led to the RF amplifier circuit (Q1). The amplified signals at Q1 are applied to the 2-stage tunable bandpass filter (D3, D4, L6, L7) to suppress unwanted signals and improve the selectivity. The signals are then applied to the 1st mixer circuit. D2D4 employ varactor diodes, that are controlled by the PLL lock voltage, to track the band pass filters.
3-1-5 AF AMPLIFIER CIRCUIT
The AF amplifier circuit amplifies the detected signals to drive a speaker. The AF circuit includes an AF mute circuit for the squelch. AF signals from IC1 (pin 9) are applied to the de-emphasis circuit (R92, C152). The de-emphasis circuit is an integrated circuit with frequency characteristic of 6 dB/octave. The integrated signals are applied to the active filters (Q21, Q22). Q21 functions as a high-pass filter to suppress unwanted lower noise signals and Q22 functions as a lowpass filter to suppress higher noise signals. The filtered signals are passed through the [VOLUME] control, and are then applied to the AF power amplifier (IC9, pin 1) via the analog switch (IC5, pins 4, 3). The output signal from IC9 (pin 4) drives the internal (external) speaker.

2nd IF filter 450 kHz FI2 (30.4 MHz) PLL IC IC3 Mixer RSSI X1 15.2 MHz 5
3-1-3 1ST MIXER AND 1ST IF CIRCUITS
The 1st mixer circuit converts the received signal to a fixed frequency of the 1st IF signal with a 1st LO (VCO output) frequency. By changing the 1st LO frequency, only the desired frequency will be passed through a pair of crystal filters at the next stage of the mixer. The signals from the RF circuit are mixed with the VCO signals at the 1st mixer circuit (Q2) to produce a 30.85 MHz 1st IF signal. The 1st IF signal is applied to a pair of crystal filters (FI1) to suppress out-of-band signals and is then amplified at the IF amplifier (Q3). The amplified signal is applied to the 2nd mixer circuit (IC1).
2ND IF AND DEMODULATOR CIRCUITS
C53 Squelch level adjustment pot R1 (VR-B unit) 8 Active filter FM detector 9 R25 CRX2 R22 R26 CNoise detector Limiter amp.
AF signal "DET" C51

IC1 TA31136F

1st IF (30.85 MHz) from Q3 "SQL" signal to the CPU pin 22 R5

3-1-6 SQUELCH CIRCUIT

A squelch circuit cuts out AF signals when no RF signals are received. By detecting noise components in the AF signals, the squelch circuit switches the AF mute switch. A portion of the AF signals from the FM IF IC (IC1, pin 9) pass through the [SQUELCH] control pot, and are then applied to the active filter section (IC1, pin 8). The active filter section amplifies and filters noise components. The filtered signals are applied to the noise detector section and output from pin 13 as the SQL signal. The SQL signal is applied to the CPU (LOGIC unit; IC1, pin 22). The CPU analyzes the noise condition and outputs the RMUT signal via the I/O expander IC (IC7) to toggle the analog switches (IC5, pins 4, 3) as an AF mute switch.

3-2-2 MODULATION CIRCUIT

The modulation circuit modulates the VCO oscillating signal (RF signal) using the microphone audio signals. Audio signals from the splatter filter (IC6b) pass through the frequency deviation adjustment pot (R130) and are then applied to the modulation circuit (D7) to change the reactance of D7, and modulate the oscillated signal at the TXVCO (Q4).
3-2-3 DRIVE AMPLIFIER CIRCUIT
The drive amplifier circuit amplifies the VCO oscillating signal to a level needed at the power amplifier. The VCO output is buffer-amplified by Q7 and Q9, and is then applied to the T/R switch (D9). The transmit signal from the T/R switch is amplified to the pre-drive (Q10) and drive (Q11) amplifiers to obtain an approximate 400 mW signal level. The amplified signal is then applied to the RF power amplifier (IC2).

3-1-7 WEATHER ALERT DECODER CIRCUIT [USA version only]
When the weather alert function is activated and a 1050 Hz alert tone from an NOAA weather radio broadcast is received, the IC-M45 emits beep tones and indicates flashing ALT on the display to inform of an emergency weather report on the air. AF signals from the FM IF IC (IC1, pin 9) are applied to the tone decoder (IC10, pin 3). When a 1050 Hz signal is detected, the tone decoder outputs a low level signal from pin 8 and the output signals are applied to the CPU (LOGIC unit; IC1) to control beep tones and the ALT indicator.
3-2-4 POWER AMPLIFIER CIRCUIT
The power amplifier circuit amplifies the driver signal to an output power level. IC2 is a power module which has amplification output capabilities of about 35 W. The output from IC2 (pin 4) is passed through the antenna switching circuit (D13) and is then applied to the antenna connector via the low-pass filter.

3-2 TRANSMITTER CIRCUITS

3-2-1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies audio signals with +6 dB/octave pre-emphasis from the microphone to a level needed at the modulation circuit. The AF signals from the microphone are amplified at the microphone amplifier (IC4). A capacitor (C135) and resistor (R114) are connected to the amplifier to obtain the preemphasis characteristics. The amplified signals are applied to the IDC amplifier (IC6a, pin 2) via the analog switch (IC5, pins 8, 9) and are passed through the splatter filter (IC6b) to suppress unwanted 3 kHz or higher signals. The filtered signals are then applied to the modulation circuit.

3-2-5 APC CIRCUIT

The APC circuit stabilizes transmit output power. The RF output signal from the power amplifier (IC2) is detected at the power detector circuit (D11, D12, L22) and is then applied to one of the differential amplifier inputs (Q13, pin 5) via the High/Low control circuit (R70, R71, Q16). The applied voltage controls the differential amplifier output (Q17, pin 2) and the bias voltage control (Q12). Thus the APC circuit maintains a constant output power. The reflected power from the antenna connector is detected at D12 and is then applied to the CPU. The detected voltage increases when the antenna is mismatched, causing the output power to be switched from High to Low to protect the power module (IC2).

APC CIRCUIT

RF signal from PLL TMUT T5 Q14 Q12 Q13 Q15 APC control circuit R71 R73 R70 C104 Q16 HI/LO C105 HV R72 "TXDET" signal to the CPU Q11 Drive amp. L22 Power module IC2 D11 D12 to antenna RF detector circuit

3-3 PLL CIRCUITS

3-3-1 GENERAL
The PLL circuit provides stable oscillation of the transmit frequency and receive 1st LO frequency. The PLL circuit compares the phase of the divided VCO frequency to the reference frequency. The PLL output frequency is controlled by a crystal oscillator and the divided ratio of the programmable divider. IC3 is a dual PLL IC which controls both VCO circuits for Tx and Rx. The PLL circuit , using a one chip PLL IC (IC3), directly generates the transmit frequency and receive 1st IF frequency with VCOs. The PLL sets the divided ratio based on serial data from the CPU on the LOGIC unit and compares the phases of VCO signals with the reference oscillator frequency. The PLL IC detects the out-of-step phase and output from pins 8 and 13 for Tx and Rx, respectively. The reference frequency (15.2 MHz) is oscillated at X1.

The phase detector compares the input signal with a reference frequency, and then outputs the out-of-phase signal (pulse-type signal) from pin 13. The pulse-type signal is converted into DC voltage (lock voltage) at the loop filter (R34, R37, R38, C64, C73), and then applied to varactor diode (D8) of the RX-VCO to stabilize the oscillated frequency. The lockvoltage is also used for the receiver circuit for the bandpass filter center frequency. The lock voltage from the loop filter is amplified at the bufferamplifier (Q6) and then applied to the RF circuit.

3-3-4 VCO CIRCUIT

The VCO outputs from Q4 (Tx) and Q5 (Rx) are bufferamplified at Q7 and Q9, and are then sent to the T/R switch (D9). The receive LO signal is applied to the 1st mixer circuit (Q2) through a low-pass filter, and the transmit signal is applied to the pre-drive amplifier (Q10). A portion of the VCO output is reapplied to the PLL IC (IC10, pin 2 or pin 13) via Q8.

3-3-2 TX LOOP

The generated signal at the TX-VCO (Q4, D6, D7) enters the PLL IC (IC3, pin 2) and is divided at the programmable divider section and is then applied to the phase detector section. The phase detector compares the input signal with a reference frequency, and then outputs the out-of-phase signal (pulse-type signal) from pin 8. The pulse-type signal is converted into DC voltage (lock voltage) at the loop filter (R41R43, C75C77), and then applied to varactor diodes (D6, D7) of the TX-VCO to stabilize the oscillated frequency.
3-4 POWER SUPPLY CIRCUITS
LINE HV HVS 5V DESCRIPTION The voltage from the connected DC power supply. Same voltage as the HV line which is passed through the [PWR] switch (VR-A unit; R1). Common 5 V converted from the HVS line at the 5V regulator circuit (IC8). Receive 5 V converted from the 5V line at the R5 regulator circuit (Q19, Q20). The regulated voltage is applied to the receiver circuits. Transmit 5 V converted from the 5V line at the T5 regulator circuit (Q17, Q18).

3-3-3 RX LOOP

The generated signal at the RX-VCO (Q5, D8) enters the PLL IC (IC3, pin 19) and is divided at the programmable divider section and is then applied to the phase detector section.

PLL CIRCUIT

Frequency range Measuring range Frequency range Output level Frequency range Measuring range Measuring range Input impedance Capacity Power attenuation Capacity : 3003000 Hz : 1500 mV : 0.1300 MHz : 0.1 V32 mV (127 to 17 dBm) : DC20 MHz : 0.0120 V : 10 mV10 V :4 : 5 W or more : 40 or 50 dB : 50 W or more
RF power meter (terminated type)

Frequency counter

Frequency range : 0.1300 MHz Frequency accuracy : 1 ppm or better Sensitivity : 100 mV or better Frequency range Measuring range Input impedance : 30300 MHz : 0 to 10 kHz : 50 k/V DC or better
FM deviation meter DC voltmeter

CONNECTIONS

Standard signal generator 17 to 125 dBm (32 mV to 0.13 V)
CAUTION: DO NOT transmit while SSG is connected to the antenna connector. +
RF power meter 50 / 150 W Frequency counter Red
DC power supply 13.8 V /15 A
FM deviation meter Attenuator 40 dB or 50 dB to the antenna connector

to DC cable Black

4-2 PLL ADJUSTMENTS
ADJUSTMENT LOCK VOLTAGE ADJUSTMENT CONDITION MEASUREMENT UNIT 1 Operating channel : ch16 Receiving MAIN LOCATION Connect a digital multi-meter or oscilloscope to the check point CP1. Connect a digital multi-meter or oscilloscope to the check point CP2. Rear Panel Loosely couple the frequency counter to the antenna connector. 2.6 V VALUE ADJUSTMENT POINT UNIT MAIN ADJUST L13
2 Operating channel : ch16 Output power : Low Transmitting REFERENCE 1 Operating channel : ch16 Output power : Low FREQUENCY Connect an RF power meter or a 50 dummy load to the antenna connector. Transmitting

156.8000 MHz

4-3 TRANSMITTER ADJUSTMENTS
ADJUSTMENT OUTPUT POWER ADJUSTMENT CONDITION MEASUREMENT UNIT 1 Operating channel : ch16 Output power : Low Transmitting 2 Output power Transmitting : High Rear Panel Connect an FM deviation meter to the antenna connector through an attenuator. Rear Panel LOCATION Connect an RF power meter to the antenna connector. 0.7 W [M45EURO] 0.9 W [M45] 24 W[M45EURO] 25 W [M45] 4.3 kHz MAIN VALUE ADJUSTMENT POINT UNIT MAIN ADJUST R70

R71 R130

FREQUENCY 1 Operating channel : ch16 Output power : Low DEVIATION Connect an audio generator to J2 (pin 5) with an AC millivoltmeter and set as: Frequency : 1 kHz Level : 230 mV [M45EURO] 550 mV [M45] Set an FM deviation meter as: HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (PP)/2 Transmitting

4-4 RECEIVER ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT UNIT SENSITIVITY 1 Operating channel : ch16 [SQUELCH] control: Max. counterclockwise Connect an SSG to the antenna connector and set as: Frequency : 156.800 MHz Level : 10 V* (97 dBm) Modulation : 1 kHz Deviation : 3.5 kHz Receiving MAIN LOCATION Connect a DC volt- Maximum voltage meter to the check point CP3. VALUE ADJUSTMENT POINT UNIT MAIN ADJUST L5, L6, L7,
*This output level of a standard signal generator (SSG) is indicated as SSGs open circuit.

to DC cable Red Black

R70 Output power R71
Output power adjustment for [High]

adjustment for [Low]

L5 L6 L7

Sensitivity adjustment

Frequency deviation adjustment
Reference frequency adjustment
CP1 PLL lock voltage CP2 PLL lock voltage CP3 Sensitivity
check point for [RX] check point for [TX] check point adjustment for [TX]
L12 PLL lock voltage L13 PLL lock voltage

adjustment for [RX]

Audio generator + 300 Hz to 3 kHz AC millivoltmeter 2200 mV

SECTION 5 PARTS LIST

[LOGIC UNIT]

REF NO.

IC1 IC2 IC3 IC4

DESCRIPTION

S.IC S.IC S.IC S.IC M38223M4-432-HP FX-2040 S-80742SL-A6-T1 TC7W02F (TE12L) X25080SI-2.7T6

ORDER NO.

1130007390 1140005620

C19 C20 C21

4030006900 S.CERAMIC 4030006900 S.CERAMIC 4030006900 S.CERAMIC
C1608 JB 1E 103K-T-A C1608 JB 1E 103K-T-A C1608 JB 1E 103K-T-A

Q1 Q2 Q3 Q4 Q5

1520000450
S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR
2SC2712-GR (TE85R) 2SA1162-GR (TE85R) 2SC2712-GR (TE85R) FMW1 T148 2SB1132 T100 Q
6510019070 S.CONNECTOR 52559-S.CONNECTOR B2B-PH-SM3-TB

DS1 DS2 DS3

5030001373 LCD 5080000170 LAMP 5080000170 LAMP
LD-HU4549J-1 (E-4548-3) HRS-7219A-Y2-30 HRS-7219A-Y2-30

D1 D2 D3 D4

1750000060 1750000060
S.DIODE S.DIODE S.DIODE S.DIODE
1SS196 1SS272 1SS196 1SS196
(TE85R) (TE85R) (TE85R) (TE85R)

8900005320 FFC

OPC-519 (N:30 L:55)
EP1 EP2 XS.CERAMIC PBRC 4.91 BR
0910049094 PCB B 5035D 8930045650 LCD CONTACT SRCN-2040-SP-N-W
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34

7030003640 7030003640

S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR
ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 474 V (470 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 333 V (33 k) ERJ3GEYJ 682 V (6.8 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) MCR10EZHJ 27 (270) MCR10EZHJ 27 (270) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 393 V (39 k) ERJ3GEYJ 563 V (56 k) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 392 V (3.9 k) ERJ3GEYJ 272 V (2.7 k) ERJ3GEYJ 154 V (150 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k)

4030006900 4030011730

C179 C180 C181 C182 C183 C184 C185 C186 C187 C188 C189 C190 C191 C192 C193 C194 C195 C196 C197 C198 C199 C200 C201 C202 C203 C204 C205 C206
S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.ELECTROLYTIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC
C1608 JB 1C 273K-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A ECEV0GA101SR C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JB 1E 103K-T-A C1608 JF 1C 104Z-T-A [USA] only C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 JF 1C 104Z-T-A C1608 CH 1H 070D-T-A C1608 CH 1H 0R5B-T-A C1608 CH 1H 040B-T-A C1608 CH 1H 080D-T-A
J1 J2 J3 J4 J5 only W1 W2

6510019250

S.CONNECTOR CONNECTOR CONNECTOR S.CONNECTOR S.CONNECTOR
B8B-ZR-SM3-TF B07B-EH-S HSJ1493-01-010 52559-3092 B11B-ZR-SM3-TF
7120000470 JUMPER 7120000470 JUMPER

ERDS2T0 ERDS2T0

EP1 EP2
0910049084 PCB 9040902902 TUBE
B 5034D IRRAX 0.7 (d) L=2 mm
only only only only only only
[USA]; IC-M45, [EUR]; IC-M45EURO 5-4

SECTION 6

[CHASSIS PARTS]
REF. NO. ORDER NO. J1 MC1
MECHANICAL PARTS AND DISASSEMBLY
DESCRIPTION QTY. 1 [Black] [White] 1 [USA] [EUR] 4 REF. NO. ORDER NO. MP1 MP2 MP8510011860 DESCRIPTION 2040 VCO Case 2040 VCO Cover 2040 Module plate 2040 A-Module plate QTY. 1 1
6510004880 Connector MR-DSE-Microphone HM-117B 0800004380 Microphone HM-117W 2510001040 Speaker F45G07-Cable OPC-Cable OPC-2040 Chassis-IC clip 2040 Case 2040 Case (A) 2040 Case (B) 2040 Case (C) 2040 Front panel 2040 Front panel (A) 2040 Front panel (B) 2040 Front panel (C) 2040 6-KEY 2040 6-KEY (A) 2040 R-packing 2040 F-packing Knob N-264 Knob N-264 (A) 1542 Jack bush 2040 Bush plate SP net Screw PH B0 M3x6 NI-ZU (BT) Screw PH B0 M3x8 NI-ZU (BT) Screw PH B0 M3x8 NI-ZU (BT) Screw BiH M3x8 SUS Screw BiH M3x8 SUS Screw PH M3x8 NI

[USA] [EUR]

SP1 W1

[ACCESSORIES]

REF. NO. ORDER NO. W1 MP1 MP2 MP3 MP4 MP5 MP6 MP7 DESCRIPTION QTY. Cable OPC-MIC hanger [U-Black] only 1632 MIC hanger (A) [U-White] only 2040 Mobile bracket [Black] 2040 Mobile bracket (A) [White] 2040 Knob bolt [Black] 2040 Knob bolt (A) [White] Screw PH A0 M3.5x30 SUS Screw PH A0 M5x20 SUS Flat washer M5 SUS Spring washer M5 SUS

MP2 MP3 MP4

MP6 MP7 MP8 MP10 MP12 MP13 MP15 MP16 MP17 MP18 MP19 MP20 MP21
[U-Black] [U-White] [E-White] [E-Black] [U-Black] [U-White] [E-White] [E-Black] [USA] [EUR]

[Black] [White]

MP1 MP5

MP6 W1 MP3 MP7

[LOGIC UNIT] Screw abbreviations
REF. NO. ORDER NO. DS1 DS2 DS3 W3 EP2 MP1 MP2 DESCRIPTION QTY. LCD LD-HU4549J-Lamp HRS-7219A-Y5080000170 Lamp HRS-7219A-Y8900005320 FFC OPC-LCD contact SRCN-2040-SP-N-W Reflector LCD holder
A, B0, BT: Self-tapping PH: Pan head FH: Flat head BiH: Bind head NI: Nickel SUS: Stainless ZK: Black
REF. NO. ORDER NO. R1 DESCRIPTION QTY. 1
7210001500 Variable resistor RK097111102AA (10KA) [PWR/VOL] (incl. nut)

[VR-B UNIT ]

7210001010 Variable resistor RK097111000AA (10KB) [SQUELCH] (incl. nut)

MP20 (C)

MP4 (C)

MP17 (C)

DS3 (L) EP2 (L)
DS2 (L) MP17 (C) MP19 (C)
J1 (C) LOGIC UNIT MP2 (L) SP1 (C) MP15 (C) MP1 (L) MP13 (C) MP21 (C) DS1 (L) MP8 (C) R1 (VB) VR-A UNIT MP7 (C)

W1 (C)

VR-B UNIT

MP2 (C)

R1 (VA) MP12 (C) MP21 (C)

MP6 (C)

MP3 (C)
MP5 (C) MAIN UNIT MP10 (C) MC1 (C) MP16 (C) W3 (L) MP21 (C)

MP16 (C)

MP3 (M)
UNIT abbreviation (C): CHASSIS PARTS (L): LOGIC UNIT (M): MAIN UNIT (VA): VR-A UNIT (VB): VR-B UNIT Note: Refer to IC-M59 service manual for HM-117 microphone details.

MP18 (C)

IC2 (M)

SECTION 7

TRANSISTOR AND FETS

2SA1162 GR (Symbol: SR)

SEMI-CONDUCTOR INFORMATION

2SB1132 Q (Symbol: BAQ)

2SB1132 R (Symbol: BAR)
2SB1143 S (Symbol: B1143)

2SC2712 GR (Symbol: LG)

C E C B

2SC2712 Y (Symbol: LY)

2SC2714 Y (Symbol: QY)

2SC2954 (Symbol: QK)

2SC(Symbol: OY3)

2SC4215 O (Symbol: QO)

2SD1664 Q (Symbol: DA)

B C E C

2SK210 GR (Symbol: YG)

2SK880 Y (Symbol: XY)

2SK882 Y (Symbol: TY)

3SK131 L (Symbol: V12)

FMW1 (Symbol: W1)

RN1402 (Symbol: XB)

RN1404 (Symbol: XD)

XP6501 AB (Symbol: 5N)

DIODES
1SS196 (Symbol: G3) 1SS226 (Symbol: C3) 1SS272 (Symbol: A1) 1SS321 (Symbol: F9) HSM88ASR (Symbol: C3)

HVU350 (Symbol: 4)

MA363 B (Symbol: 6D)

MA862 (Symbol: M1I)

RD6.2M B2 (Symbol: 622)

SECTION 8

8-1-1 TOP VIEW

BOARD LAYOUTS

8-1 LOGIC, VR-A AND VR-B UNITS

LOGIC UNIT

SP+ SP+ SP SP GND BEEP PTT ICF3 HANG TXDET OEX. OE P. STB OEX.STB TONE S.METER SQL PTT. S UNLK CK J2 DATA 1 KEY.M DATAM GND 2 DATAS FROM SQLV MICROPHONE BUSY GND GND F. MODE HVS NC 1 5V

TO MAIN UNIT J4

C21 R26 R23 R22 R21 R20 R24

Q4 R18

R33 R31 R32 C19 C16

R34 R2

R16 R17 C8

Q1 IC3

R12 R11 R8

R14 C7 R13 R6 C6

VR-A UNIT

VR-B UNIT

SQLG SQLV SQLI

HV GND VOL2 VOL1 HVS

TO MAIN UNIT J1

8-1-2 BOTTOM VIEW

TOP VIEW

8-2 MAIN UNIT

FROM MICROPHON
GND DATAS OP.RST PTT.S BUSY RMUT ICF3 DATAM 5V DET DSC 1
AF2 GND MIC GND HANG PTT AF1

FROM OPTIONAL UNIT

FROM LOGIC UNIT J1

C158 R106

C143 C167

R133 R114 C146 R118

IC6 IC8 C143

C181 R131 C147 R132 R120

C126 R128
SP+ SP+ SP SP GND BEEP PTT ICF3 HANG TXDET OEX.OE P.STB OEX.STB TONE SQL.C SQL PTT.S UNLK CK DATA DATAM DATAS SQLV BUSY GND GND NC HVS NC 5V

R130 C169

R127 C140 R126 R129 C168

IC10 IC7 J4 Q25

C144 R137 R136

C172 Q24

R64 C92

C93 R62 R61

C177 R100 C155 C150

C149 C189

D10 Q18

R89 C186 C192

C154 R99 R98 C179

Q22 C156

VOL2 VOL1 GND HVS HV SQLV SQLI SQLG

R90 R96 R93 R94 R95 R97

R88 C115 R156 C114 R155

1 FROM VR-A UNIT P1

R154 C153 R92

C110 R78 R76

R72 C124 C123 C122 C121 L24 C120 L23

C44 L11 X2

D8 D11

C101 R68

C65 R43 R41 C61 R34 R42 C77 C76 C205

R66 C68 C105 C104

R32 C81

L10 L12

D6 D18

Q8 Q4 D7

R29 R30 C62 C203 R33 C63 C204 C64 R47

L17 C79 R140

R48 C188

L21 FE1B

C197 C185

C28 C196 C201

C82 R51 L18 C83

C31 C30

R12 C32 L8

L7 L6 L5

L2 L25

BOTTOM VIEW

RED BLK

C127 C128

C2 C102
C173 C95 C162 C180 R69 C175 C108 C90 C130 C131 R134 C129 R142 R112 R111 C133 R113 C134 C141 C183 C107 R141 R59 C174 C176 C99 R57 C87 R74 R56 R58 C88

C6 C5 C7 C9 C178 C8

C10 R55 C86 C16 R54 R53 C85 R46 C78

C13 R2 C15

D14 D15

C116 C118

R4 C17 C19

R15 C29

R52 C182
R31 C195 R122 C137 C119 R87 R86 R123 R102 R119 R101 R103 R104 R125 R136 R117 R107 R139 C171 R138 R25 C52 C51 C50 C43 R45 C166

R84 R138 R124

C23 C26

C190 C74 R40

C113 R44 R37

C111 C112

R7 C25 C34

C73 R39 R38 C41

R81 R150 R148 R146

C72 R36 R16 C184 C36

R14 C33

R18 C38 C37

R20 R19 R17

R82 R108

R23 R28

R26 C54 C53

C198 R152 R153 R135

R27 C55

FI2: CFWS450E CERAMIC BPF ANT IC1: TA31136FN (D) Q2: 3SK131 L FM DET 2nd IF AMP BPF BPF ANT SW Q3: 2SC2714 Y NOISE AMP 2nd LO TX/RX SW YGR AMP Q10: 2SCQ11: 2SC2954 D9: MA862 X2: CDBCA450CX24 Q14: RN1404 Q15: RN1404 HI/LOW CTRL Q16: RN1402 PRE DRIVE RF POWER AMP IC2: SC-1302 RF OUT DET NOISE DET SQL SW 2nd MIX IF AMP RF AMP Q1: 2SK882 Y XTAL BPF FIL D1: XB15A308 D13: XB15A308 LPF

SECTION 9

LOGIC UNIT
LAMP DS2: HRS-7219A-YDS3: HRS-7219A-Y2 30

SQL VR (VR-B unit)

Q21: 2SC2712 Y Q22: 2SC2712 Y
D11: HSM88ASR D12: HSM88ASR

DS1: LD-HU4549J-1

IC4: X25080S1-2.7

AF FILTER

Q12: 2SB1143 S

EEPROM

AF POWER AMP

AF MUTE

DIM Q4: FMW1 Q5: 2SB1132 Q

IC9: LA4425A

BEEP SQL TONE DECODER
IC5: BU4066BCF AF VR (VR-A unit)

MAIN UNIT

TX MUTE CTRL

X1: PBRC 4.91 BR

DSC UNIT (OPTION) X1: CR-528 15.2MHz PLL IC3:UPD3140GS BUFF Q8: 2SC4215 O
IC10: BA1604F [M45] only LOOP FIL VCO BUFF Q7: 2SC4215 O Q4: 2SK210 GR Q5: 2SK210 GR BUFF Q9: 2SC4215 O IC4: TA75S558F(TE85L) MIC AMP LPF IC6B: M5218AFP 600C IC6A: M5218AFP 600C IDC AMP

RESET IC2: S-80742SL-A6

PATTERN SWITCH
COMMON LINE RX LINE TX LINE LINE DATA BUS LINE

IC7: BU4094BCF

EXPAND

POWER SW (VR-A unit)

IC8: TA7805F

Q20: 2SB1132 R

Q18: 2SB1132 R

REVERSE CONECT PROTECT

R5 CTRL

T5 CTRL

D17: DSA3A1

IC1: M38223M4-432HP

SECTION 10

10-1 LOGIC UNIT

DS3 HRS-7219-A-Y2 30

VOLTAGE DIAGRAM

DS1 LD-HU4549J-1 S31 S30 S29 S28 S27 S25 S24 S23 S22 S21 S26 S20 S19 S18 S17 S15 S14 S13 S12 S11 S10 S9 S8 S16 S7 S6 S5 S4 S3 S2 S1 S0 C1 C0

DS2 HRS-7219A-Y2 30

R127 NTCCS20123NH 103KCT Rk 6 Rk Rk

IC6a M5218AFP 600C

IC5 BU4066BCF
7 I/O O/I O/I I/O CONT.B CONT.C VEE

C136 0.1

C138 0.0033 Rk Rk C140 0.0027 CP C137 0.001

Tx: 2.6V

VDD CONT.A CONT.D I/O O/I O/I I/O

IC4 TA75S558F

C128 0.001 R134 100

C127 0.001

C110 0.1 Tx(Hi): 4.9V Tx(Lo): 0V Rx: 4.9V

HI/LO C177 0.01

J2 B07B-EH-S AF1 PTT HANG GND MIC GND AF6 7

D14 1SS196 e only

to LOGIC unit J1
C133 0.001 HV R5 T5 5V HVS Rx: 5.0V Tx: 5.0V 5.0V R93 1k R105 0.1 C158 0.001

C132 0.001 e only

C131 0.001 C130 0.001

RRRR148 47

C159 0.22

C160 2.2

Rk C153 0.027 C179 0.027

R96 2.7 k

Q22 2SC2712 Y

C156 10

CC161 2.2 C162 0.C164 470

D15 RD6.2M B2 e only

C129 0.001
C144 0.RCV SEND MIC.C DSC.C TMUT RMUT OP.RST HI/LO

C151 1

R92 8.2 k Rk C152 0.22 Rk

C154 0.0022

Rk CD16 1SS226

Q21 2SC2712 Y

IC9 LA4425A

R109 4.7

STR. D CLK OE
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 QS QS

R100 2.2 k

C165 0.1
J1 B8B-2R-SM3-TF SQLG SQLI SQLV HV HVS GND VOL1 VOL2 HV C148 C147 C0.01 0.1 C180 C146 0.01 0.1 CBEEP GND from DC cable 7 8

Rk Rk Rk C150 0.001

Q20 2SB1132 R
Rk R91 2.2 k RCV C186 0.1 C149 0.001

Q18 2SB1132 R

C189 0.1 R89 2.2 k Rk

IC8 TA7805F

RO G I HVS

OEX.STD

OEX.OE

NOTE e : [EUR] u : [USA]

IC7 BU4094BCF

C187 0.1

Q19 RN1404

Q17 RN1404

C194 0.1

D17 DSA3A1

R154 10

10 - 2

10-3 VR-A AND VR-B UNITS

VR-A UNIT

W1 JSQLG SQLI SQLV HV HVS GND VOL1 VOL2 SQLI SQLV SQLG

to MAIN unit J1

JHV GND VOL2 VOL1 HVS

10 - 3

IC-M45EURO-2

02.3.12 4:17 PM

Page A (1,1)

INSTRUCTION MANUAL

VHF MARINE TRANSCEIVER

iM45EURO

Page ii (1,1)

FOREWORD

Thank you for purchasing this Icom product. The IC-M45EURO VHF MARINE TRANSCEIVER is designed and built with Icoms superior technology and craftsmanship. With proper care this product should provide you with years of trouble-free operation.
FEATURES Durable, water-resistant construction Dual watch and tri-watch functions
carefully and comBuilt tough to withstand the punishing marine environment, the IC-M45EURO offers reliability you can count on.

IMPORTANT

READ ALL INSTRUCTIONS
pletely before using the transceiver.
Convenient functions which allow you to monitor the distress channel (ch 16) while receiving a channel of your choicedual watch; or monitor the distress channel and another channel while receiving a channel of your choicetri-watch. With dimensions of 20(H) 60(W) mm, the ICM45EUROs function display is easy to read and shows operating conditions at a glance. Backlighting and contrast can be adjusted to suit your preferences.
SAVE THIS INSTRUCTION MANUALThis instruction manual contains important operating instructions for the IC-M45EURO.

Large, easy-to-read LCD

EXPLICIT DEFINITIONS
DEFINITION Personal injury, fire hazard or electric RWARNING shock may occur. CAUTION NOTE ii Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, re or electric shock. WORD
Smart microphone Simple operation
Operating channel and transmit output power level settings are easily selectable via the supplied microphone.
Ergonomic design with a minimum number of switches and controls provides simple intuitive operation.

Page iii (1,1)

CAUTIONS
RWARNING! NEVER connect the transceiver to an AC outlet. This may pose a re hazard or result in an electric shock. RWARNING HIGH VOLTAGE! NEVER touch the antenna or an internal antenna connector during transmission. This may result in an electric shock or a burn. NEVER connect the transceiver to a power source of more
than 16 V DC. This connection will ruin the transceiver.

IN CASE OF EMERGENCY

If your vessel requires assistance, contact other vessels and the Coast Guard by sending a distress call on channel 16.
USING CHANNEL 16 DISTRESS CALL PROCEDURE
1. MAYDAY MAYDAY MAYDAY. 2. THIS IS.. (name of vessel) 3. Your call sign or other indication of the vessel. 4. LOCATED AT. (your position) 5. The nature of the distress and assistance required. 6. Any other information which might facilitate the rescue.
Versions of the IC-M45EURO which display the CE symbol on the serial number seal, comply with the essential requirements of the 89/336/EEC directive for Electromagnetic Compatibility.
AVOID using or placing the transceiver in direct sunlight or
in areas with temperatures below 20C (4F) or above +60C (+140F).
DO NOT operate the transceiver without running the vessels engine. When your vessels engine is OFF and the transceiver is transmitting, the vessels battery will soon become exhausted.
KEEP the transceiver out of the reach of children. KEEP the antenna cable and DC power cable as far away
as possible from electrical pumps, generators and other electronic instruments to prevent instrument malfunctions.
KEEP the transceiver and microphone at least 1 meter away from your vessels magnetic navigation compass.

Page iv (1,1)

TABLE OF CONTENTS
FOREWORD... ii IMPORTANT.. ii EXPLICIT DEFINITIONS... ii FEATURES... ii CAUTIONS... iii IN CASE OF EMERGENCY.. iii TABLE OF CONTENTS.. iv 1 OPERATING RULES.. PANEL DESCRIPTION.. 24 I Front panel... 2 I Microphone... 3 I Function display... BASIC OPERATION.. 510 I Power ON... 5 I Channel selection... 5 I Receiving... 7 I Transmitting... 8 I Scan function... 9 I Call channel programming.. 10 I Display backlighting... SET MODE... 1112 I Entering SET mode... 11 I SET mode items... CONNECTIONS AND MAINTENANCE.. 1316 I Unpacking... 13 I Antenna... 13 I Fuse replacement.. 13 I Cleaning... 13 I Connections.. 14 I Mounting the transceiver.. 15 I Dimensions... TROUBLESHOOTING.. VHF MARINE CHANNEL LIST. SPECIFICATIONS AND OPTIONS.. 19 I Specications.. 19 I Options... 19

Page 1 (1,1)

OPERATING RULES

D Priorities

Read all rules and regulations pertaining to priorities and keep an up-to-date copy handy. Safety and distress calls take priority over all others. You must monitor channel 16 when you are not operating on another channel. False or fraudulent distress calls are prohibited under law.

OPERATORS LICENSE A restricted Radiotelephone Operator Permit is the license most often held by small vessel radio operators when a radio is not required for safety purposes. The Restricted Radiotelephone Operator Permit must be posted near the transceiver or be kept with the operator. Only a licensed radio operator may operate a transceiver. However, non-licensed individuals may talk over a transceiver if a licensed operator starts, supervises, ends the call and makes the necessary log entries. A current copy of the applicable government rules and regulations is only required to be on hand for vessels in which a radio telephone is compulsory. However, even if you are not required to have these on hand it is your responsibility to be thoroughly acquainted with all pertinent rules and regulations.

D Privacy

Information overheard but not intended for you cannot lawfully be used in any way. Indecent or profane language is prohibited.

D Radio licenses

SHIP STATION LICENSE When your craft is equipped with a VHF FM transceiver, you must have a current radio station license before using the transceiver. It is unlawful to operate a ship station which is not licensed. Inquire through your dealer or the appropriate government agency for a Ship-Radiotelephone license. This license includes the call sign which is your crafts identication for radio purposes.

Page 2 (1,1)

PANEL DESCRIPTION

I Front panel

VHF MARINE

PWR VOL

SQUELCH
q q CHANNEL UP/DOWN SWITCHES [YUP]/[ZDN] Push to select an operating channel. (p. 6)
Push and hold to speed scroll up or down through the available channels. w SCAN SWITCH [SCAN TAG]
Push to start/stop scanning. (p. 9)
Scan type can be selected in SET mode. (p. 12)
Push for 1 sec. to toggle the tag setting for the displayed channel. (p. 9)
e HIGH/LOW POWER SWITCH [H/L DIM] Toggles between high and low output powers. (p. 8) While pushing, push the [UP]/[DN] switches to adjust the display backlighting. (p. 10) While pushing, push [SCAN] for 3 sec. to clear all tag channels. (p. 9) r CHANNEL SWITCH [CH DUAL] Push to selects the International channel group. (p. 6) The U.S.A. channel group is also available. To toggle between international and U.S.A. channels, while pushing [H/L], push this switch.

Page 3 (1,1)

t CHANNEL 16 SWITCH [16 C] Push to select channel 16. (p. 5) Push for 1 sec. to select the call channel (the call channel number is different depend on version). (p. 5) Each group can have its own call channel programmed. Push for 3 sec. (when a call channel is selected) to enter call channel write mode. (p. 10)

Channel indication ashes.

I Microphone

y SQUELCH CONTROL [SQUELCH] Rotate clockwise to eliminate audio noise. (p. 7) u POWER/VOLUME CONTROL [PWR/VOL] Turns power ON and OFF and adjusts the audio output level.
q CHANNEL UP/DOWN SWITCHES [Y]/[Z] Select an operating channel in the selected channel group.
These switches can be used instead of the transceivers [UP]/[DN] switches.
w HIGH/LOW POWER SWITCH [HI/LO] The same function as the transceivers [H/L] switchtoggles between high and low output powers.
Pushing this key at power ON turns the microphone keys ON/OFF.

Page 4 (1,1)

I Function display

q w e r t y

T X BUSY

LOW CALL USA INT

TAG DUALTRI SCAN DUP
o q TRANSMIT INDICATOR Appears while transmitting. (p. 8) w BUSY INDICATOR Appears when receiving a signal or when [SQUELCH] is rotated too far clockwise. (p. 7) e CHANNEL INDICATOR Shows the operating channel (pgs. 5, 6) r TAG CHANNEL INDICATOR Appears when the selected channel is set as a tag channel. (p. 9) t DUALWATCH INDICATOR Appears and ashes during dualwatch operation. (p. 7) y TRI-WATCH INDICATOR Appears and ashes during tri-watch operation. (p. 7) 4 u SCAN INDICATOR Appears and ashes during scan operation. (p. 9) i DUPLEX INDICATOR Appears when the selected channel is a duplex channel. (p. 6) o CALL CHANNEL INDICATOR Appears when the call channel is selected. (p. 5) !0 MODE INDICATORS (p. 5, 6) USA shows that USA channels are selected. INT shows that international channels are selected. !1 LOW POWER INDICATOR Shows that low output power is selected. (p. 8)

Page 5 (1,1)

BASIC OPERATION

I Power ON

Rotate [PWR/VOL] clockwise to turn power ON.

I Channel selection

D Channel 16
Channel 16 is the distress channel. It is used for establishing initial contact with another station and for emergency communications. Channel 16 is monitored during dual/tri-watch. While standing by you are required to monitor channel 16.
LOW CALL CANUSA INT WX ALT
TAG DUALTRI SCAN DUP ACK RCV
All display indications appear briefly.
Push Channel 16 is automatically selected.
Operate the transceiver as indicated in the following sections.

D Call channel

The call channel is used to store your most often-used channel for quick recall. In addition, the call channel is monitored during tri-watch. The default setting for the call channel is channel 16* which is for leisure boat use. A separate call channel can be set for each channel group (USA and INT). * The default call channel number is depends on version.

D Low voltage indicator

When bAT appears and flashes as shown at right, there is a DC power source problem. In this case, check your vessels battery and DC power cable.

Push for 1 sec.

CALL USA
CALL indicates that the call channel is selected.

Page 6 (1,1)

D International channels
There are 55 international channels for the IC-M45EURO. q Push [CH] to select an international channel. w Push [UP]/[DN] to select a channel. DUP appears for duplex channels.

TAG DUP

Simplex channel Used for ship-to-ship communication
Duplex channel Used for ship-to-coast communication
The previously selected channel is recalled by the [CH] switch directory from channel 16 or the call channel. However, once push the channel [UP]/[DN] switch from channel 16 or the call channel, the previously selected channel cannot be recalled in this manner. 6

Page 7 (1,1)

I Receiving
Rotate [PWR/VOL] to turn power ON. Rotate [SQUELCH] fully counterclockwise. Adjust [PWR/VOL] to a suitable listening level. Rotate [SQUELCH] clockwise until the audio noise disappears. Select a channel. See pgs. 56 for details.
When a signal is received: The squelch opens. Audio is emitted from the speaker. BUSY appears in the function display.
When dual watch is selected in SET mode: Push [CH DUAL] for 1 sec. to start dual watch.
Checking channel 16 every 2 sec.
When receiving a signal on channel 16. Channel 16 is monitored until the signal disappears.
When tri-watch is selected in SET mode: Push [CH DUAL] for 1 sec. to start tri-watch.
When an interrupting signal is received, rotate [SQUELCH]

deeply clockwise.

D Dual/tri-watch functions
These functions allow you to conveniently check the distress channel (ch 16) or, both the distress and leisure call channel (ch 9; programmable) while receiving another channel. When receiving a signal on one of these channels, the transceiver stops on the channel until the signal disappears. Depending on your preference, select dual watch or tri-watch in advance in SET mode (p. 12). Dual watch is the default setting.

Checking channel 16 and the call channel every 2 sec.
When receiving a signal on the call channel, the call channel is monitored while checking ch 16 in 2 sec. intervals.
When receiving a signal on channel 16, channel 16 has priority.
Push any switch to cancel dual/tri-watch and return to normal operation. 7

Page 8 (1,1)

I Transmitting
Before transmitting, read the call procedures at right.
CALL PROCEDURES You must identify yourself when you transmit and you must respect time limits. 1) Give your call sign each time you call another vessel or a coast station. If you have no call sign, identify the station by giving the vessel name and the name of the license. 2) Give your call sign at the end of each transmission that lasts more than 3 minutes. 3) You must pause and give your call sign at least once every 15 minutes during long ship-to-shore calls. 4) Keep your calls short (less than 3 minutes). Wait 2 minutes before repeating a call.
Select an operating channel. See pgs. 56 for details. Push [H/L] to select a transmit output power.
LOW appears when low output power is selected. High power cannot be selected on some channels. Refer to the channel list on p. 18.
Push and hold the [PTT] switch to transmit.

$ appears.

Speak into the microphone at your normal voice level.
Do not hold the microphone too closely to your mouth or speak to loudly. This may distort the signal.
Release the [PTT] switch to receive. IMPORTANT: In order to maximize the readability of
your transmitted signal, pause for a moment after pushing [PTT], hold the microphone 1520 cm from your mouth, then speak into the microphone at an even, normal voice level.

Page 9 (1,1)

I Scan function
The transceiver has a high speed scan function for standing by on utility signals. The scan speed is 8 channel/sec. (except when the weather alert function is in use). Two scan types are available: normal scan (scans all tag channels in sequence) and priority scan (checks channel 16 while scanning). These scans can be selected in SET mode (p. 12).

D Scan operation

Be sure the squelch is set to the threshold point. Push [SCAN] to start scanning.
SCAN appears and ashes in the function display. 16 appears during priority scan.
To stop the scan, push [SCAN] again.

SCAN disappears.

D Setting tag channels
You can specify channels as tag channels for efcient scanning. Tag channels can be set for each channel group (USA, INT) independently. Select the desired channel, then push [SCAN TAG] for 1 sec. to toggle the tag setting.

Scan resume timer

When a signal is detected, scan pauses until the signal disappears or resumes after pausing 5 sec., according to the SET mode setting. (p. 12)
Appears when the channel is specified as a tag channel.

Conrming tag channels

While operating scan, push [UP] or [DN].
Only tag channels are selected. Stop pushing [UP] or [DN] to resume scan.
Clearing all tag channels
While pushing [H/L], push [SCAN TAG] for 3 sec. until the long beep becomes 2 short beeps.
All tag channels in the selected channel group are released.

Page 10 (1,1)

I Call channel programming
Pushing [16 C] for 1 sec. selects the call channel, channel 16 by default, however you can program your most oftenused channels in each channel group for quick recall.

I Display backlighting

The function display and switches can be backlit for better visibility under low light conditions. While pushing [H/L DIM], push [UP] or [DN] to adjust the backlighting.
Push [16 C] for 1 sec. to select the call channel of the selected group.
CALL and the call channel number appear. Push [16 C] for 3 sec. to
Backlighting can be set to 1 of 4 intensities or turned OFF.
enter call channel write mode.
Call channel and channel group to be programmed ash.
Push [UP] or [DN] to select

the desired channel.

Push any switch to automatically program the selected channel.
The transceiver returns to normal operation.

Page 11 (1,1)

SET MODE

I Entering SET mode

SET mode is used to customize operation of the transceiver to suit your operating needs. *1

I SET mode items

Beep tones (p. 12) *2 Normal/priority scan (p. 12) Scan timer (p. 12) *2 Dual/tri-watch (p. 12)

D To enter SET mode:

While pushing [16], turn power ON.
Keep pushing [16] until the initial SET mode display appears. SET mode is selected.
To exit SET mode, turn power OFF then ON again.

D To select an item:

There are 5 items in SET mode that may be adjusted to suit your operating needs. Select SET mode as above. Push [16] to select an item; then push [UP]/[DN] to set the condition for the item.

Select a SET mode item*2

Select a SET mode condition*1
SET mode items above are shown at their default conditions. 11

Page 12 (1,1)

D BEEP TONES
This item sets the transceivers confirmation beep tones (when pushing a switch) ON or OFF.

Beep tones ON (default) Beep tones OFF

D SCAN TIMER

This item sets the scan timer ON or OFF.
Scan timer OFF (default) Scan timer ON

D NORMAL/PRIORITY SCAN

This item sets the scan function to normal or priority operation. (See p. 9)
Priority scan (default) Normal scan
Scan pauses on a signal until the signal disappears, and resumes 3 sec. after that.
Scan pauses on a signal and resumes 5 sec. later.

D DUAL/TRI-WATCH

This item sets the [CH DUAL] switch to activate dual watch or tri-watch. (p. 7)
Dual watch (default) Tri-watch

Page 13 (1,1)

CONNECTIONS AND MAINTENANCE

I Unpacking

Mounting bracket.. 1 DC power cable (OPC-632).. 1 Microphone hanger.. 1 Mounting bracket knobs.. 2 Mounting screws (5 20).. 2 Mic hanger screws (3.5 30).. 2 Flat washers (M5)... 2 Spring washers (M5).. 2

I Antenna

A key element in the performance of any communication system is an antenna. Ask your Dealer about antennas and the best places to mount them.

I Fuse replacement

Two fuses are installed in the supplied DC power cable. If a fuse blows or the transceiver stops functioning, track down the source of the problem, if possible, and replace the damaged fuse with a new, rated one.

Fuse rating: 10 A

I Cleaning
If the transceiver becomes dusty or dirty, wipe it clean with a dry, soft cloth. AVOID the use of solvents such as benzene or alcohol, as they may damage transceiver surfaces.

Page 14 (1,1)

I Connections
q DC POWER CONNECTOR Connects the supplied DC power cable from this connector to an external 12 V DC power source. w ANTENNA CONNECTOR Connects a marine VHF antenna with a PL-259 connector to the transceiver. CAUTION: Transmitting without an antenna will damage the transceiver.
e EXTERNAL SPEAKER JACK Connects to an external speaker. See OPTIONS on p. 19 for available external speakers r MICROPHONE HANGER Rest the microphone on the hanger when not in use.

Page 15 (1,1)

I Mounting the transceiver
The universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting. Please read the following instructions carefully. Mount the transceiver securely with the 2 supplied screws (M5 20) to a surface which is more than 10 mm thick and can support more than 5 kg. Mount the transceiver so that the face of the transceiver is at 90 to your line of sight when operating it.
DASHBOARD MOUNTING (with optional MB-69)
CAUTION: KEEP the transceiver and microphone at least 1 meter away from your vessels magnetic navigation compass.
NOTE: Check the installation angle; the function display may not be easy to read at some angles. OVERHEAD MOUNTING

Page 16 (1,1)

I Dimensions
28.5 mm (18 in) 51 mm (2 in)

86.5 mm (in)

25 mm (1 in)

152 mm (6 in)

67 mm (in)

178 mm (7 in)

Page 17 (1,1)

TROUBLESHOOTING

PROBLEM No power comes on. POSSIBLE CAUSE Power cord not connected properly. Blown fuse. [SQUELCH] is rotated too far clockwise. SOLUTION Check the power cord connection. Check the polarity of the power connection, then, replace the fuse. Rotate [SQUELCH] counterclockwise to a suitable position. Set beeps to ON in SET mode. Rotate [SQUELCH] counterclockwise to a suitable position. Check, and if necessary, replace the feedline or solder the antenna connector again. Change channels.
REF. p. 14 p. 13 p. 7 p. 12 p. 7 p. 14 p. 18
No sound comes from the speaker.
No beeps sound even when a Beep function is turned OFF. switch is pushed. Sensitivity is low and only strong signals are audible. [SQUELCH] is rotated too far clockwise. Antenna feedline or the antenna connector solder has poor contact or is short circuited. Transmitting is impossible or high power cannot be selected. Desired channel cannot be selected. No display backlighting. Scan does not start. Transmission is restricted on some channels.
Different channel group is selected. Backlight function is turned OFF. No TAG channels are programmed.
Push [CH] to select the appropriate channel group. While pushing [ H/L DIM], push [UP]/[DN] to select the desired brightness. Set channels to be scanned as TAG channels.

p. 6 p. 10 p. 9

Page 18 (1,1)
CH 156.050 156.100 156.150 156.200 156.250 156.300 156.350 156.400 156.450 156.500

VHF MARINE CHANNEL LIST

Frequency (MHz) Transmit Receive 160.650 160.700 160.750 160.800 156.300 160.950 156.400 156.450 156.500 Frequency (MHz) Transmit Receive 156.550 156.600 156.650 156.700 156.800 156.850 156.900 156.950 157.000 156.550 156.600 156.650 156.700 156.750 156.800 156.850 161.500 161.550 161.600 Frequency (MHz) Transmit Receive 157.050 157.100 157.150 157.200 157.250 157.300 157.350 157.400 156.025 156.075 161.650 161.700 161.750 161.800 161.850 161.900 161.950 162.000 160.675 Frequency (MHz) Transmit Receive 156.125 156.175 156.225 156.275 156.325 156.375 156.425 156.475 156.575 160.725 160.775 160.825 160.875 160.925 156.375 156.425 156.475 156.525 156.575 Frequency (MHz) Transmit Receive 156.625 156.675 156.725 156.875 156.925 156.975 157.025 157.075 157.125 157.175 156.625 156.675 156.725 156.875 161.525 161.575 161.625 161.675 161.725 161.775 Frequency (MHz) Transmit Receive 157.225 157.275 157.325 157.375 157.425 161.825 161.875 161.925 161.975 162.025

International channels

CH 20 CH CH 71 CH CH 88

160.850 15*1 156.750

160.625 70*2 156.525
*1 Low power only *2 Receive only

Page 19 (1,1)

SPECIFICATIONS AND OPTIONS

I Specications

General
Frequency coverage Usable channels Mode Power supply requirement Current drain

(at 13.8 V DC)

Receiver
: Double-conversion superheterodyne Intermediate frequencies : 1st 30.85 MHz 2nd 450 kHz Sensitivity : 0.3 V at 12 dB SINAD Intermodulation rejection : More than 68 dB Adjacent channel selectivity : More than 70 dB Spurious response rejection ratio : More than 70 dB Audio output power : More than 2 W at 10%
(at 13.8 V DC) distortion with a 4 load

Receive system

Frequency stability Usable temperature range Dimensions
(projections not included)

Weight

: Transmit 156157.5 MHz Receive 156163 MHz : All International channels : 16K0G3E : 13.8 V DC 15% (negative ground) : Transmit high power 6.0 A Receive max. audio output 1.2 A : 1.5 KHz (20C to +60C) : 20C to +60C; 4F to +140F : 152(W) 67(H) 144(D) mm 6(W) 258(H) 523(D) in : 900 g; 2 lb

Audio output impedance

I Options
MB-69 FLUSH MOUNT For mounting the IC-M45EURO to a panel. Available in black or white. SP-5 EXTERNAL SPEAKER A large, external speaker for superior audio output. SP-10 EXTERNAL SPEAKER A compact, external speaker. Features easy installation.

Transmitter

Output power Modulation system Max. frequency deviation Spurious emissions Microphone impedance : High 25 W Low 1 W : Variable reactance frequency modulation : 5 kHz : Less than 70 dB : 600

Page 20 (1,1)

Count on us!
A-5485D-1EU-w Printed in Japan 1997 Icom Inc.
6-9-16 Kamihigashi, Hirano-ku, Osaka 547-0002 Japan