0 IC-M401EURO_
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INSTRUCTION MANUAL

VHF MARINE TRANSCEIVER

iM401EURO

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IN CASE OF EMERGENCY

If your vessel requires assistance, contact other vessels and the Coast Guard by sending a distress call on Channel 16. Or, transmit your distress call using digital selective calling on Channel 70 (the optional DS-100 (#02) must be installed).
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 (AND 9-digit DSC ID if you have one). 4. LOCATED AT.. (your position) 5. The nature of the distress and assistance required. 6. Any other information which might facilitate the rescue.
USING DIGITAL SELECTIVE CALLING (ch 70)
(DS-100 DSC CONTROLLER is required)
DISTRESS CALL PROCEDURE 1. Push and hold [DISTRESS] on the DS-100 for 5 sec. until you hear 5 short beeps change to one long beep. 2. Wait for an acknowledgment from a coast station.
Channel 16 is automatically selected.
3. Push and hold [PTT], then transmit the appropriate information as at left.
Versions of the IC-M401EURO which display the CE symbol on the serial number seal, comply with the essential requirements of the European Radio and Telecommunication Terminal Directive 1999/5/EC. This warning symbol indicates that this equipment operates in non-harmonised frequency bands and/or may be subject to licensing conditions in the country of use. Be sure to check that you have the correct version of this radio or the correct programming of this radio, to comply with national licensing requirement. Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United states, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
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INSTALLATION NOTES

The installation of this equipment should be made in such a manner as to respect the EC recommended electromagnetic field exposure limits (1999/519/EC). The maximum RF power available from this device is 25 watts. The antenna should be installed as high as possible for maximum efficiency and that this installation height should be at least 5 meters above ground (or accessible) level. In the case where an antenna cannot be installed at a reasonable height, then the transmitter should neither be continuously operated for long periods if any person is within 5 meters of the antenna, nor operated at all if any person is touching the antenna. In all cases any possible risk depends on the transmitter being activated for long periods. (actual recommendation limits are specied as an average of 6 minutes) Normally the transmitter is not active for long periods of time. Some radio licenses will require that a timer circuit automatically cuts the transmitter after 12 minutes etc. Similarly some types of transmitter, SSB, CW, AM, etc. have a lower average output power and the perceived risk is even lower.

TABLE OF CONTENTS

1 OPERATING RULES. PANEL DESCRIPTION. I Panel description.. 2 I Function display. 3 I Microphone.. BASIC OPERATION.. I Channel selection.. 6 I Receiving and transmitting. 8 I Call channel programming.. 9 I Memory channel names. DUALWATCH/TRI-WATCH. 1011 I Description.. 10 I Operation.. SCAN OPERATION. I Scan types.. 12 I Setting tag channels.. 13 I Starting a scan. SET MODE.. I Set mode programming.. 14 I Set mode items.. CONNECTIONS AND MAINTENANCE.. I Unpacking.. 16 I Antenna... 16 I Fuse replacement. 16 I Cleaning... 16 I Connections.. 17 I Mounting the transceiver.. 18 I Dimensions.. TROUBLESHOOTING.. CHANNEL LIST.. SPECIFICATIONS AND OPTIONS. 24 I Specications.. 24 I Options.. 24 MB-69 TEMPLATE
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IMPORTANT

READ ALL INSTRUCTIONS carefully and completely
before using the transceiver.
SAVE THIS INSTRUCTION MANUAL This instruction manual contains important operating instructions for the IC-M401EURO.

CAUTION

RWARNING! NEVER connect the transceiver to an AC
outlet. This may pose a fire hazard or result in an electric shock.
DO NOT use or place the transceiver in areas with temperatures below 20C or above +60C or, in areas subject to direct sunlight, such as the dashboard. AVOID the use of chemical agents such as benzine or alcohol when cleaning, as they may damage the transceiver surfaces. BE CAREFUL! The transceiver rear panel will become

hot when operating continuously for long periods. Place the transceiver in a secure place to avoid inadvertent use by children. After exposure to salt water, clean the transceiver thoroughly with fresh water to avoid corrosion. Do not pour water on the transceiver under the water tap directly.
NEVER connect the transceiver to a power source of more than 16 V DC or using reverse polarity. This will ruin the transceiver. NEVER cut the DC power cable between the DC plug and
fuse holder. If an incorrect connection is made after cutting, the transceiver may be damaged.
NEVER place the transceiver where normal operation of the
vessel may be hindered or where it could cause bodily injury.
KEEP the transceiver at least 1 m away from the ships navigation compass.
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OPERATING RULES

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 signals are prohibited and punishable by law.
(2) 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 or 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. Keep a copy of the current government rules and regulations handy.

PRIVACY

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

RADIO LICENSES

(1) SHIP STATION LICENSE 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 application. This government-issued license states the call sign which is your crafts identication for radio purposes. 1

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PANEL DESCRIPTION

The European version has International channels only and this function is not available.

I Panel description

Speaker

Function display q

Starts dualwatch or tri-watch when pushed for 1 sec. Stops dualwatch/tri-watch when either is activated. t CHANNEL 16/CALL CHANNEL SWITCH [16] Selects Channel 16 when pushed. (p. 6) Selects call channel when pushed for 1 sec. (p. 6)
CALL appears when call channel is selected.

iC-m401euro

q POWER/VOLUME CONTROL [VOL] Turns power ON and OFF and adjusts the audio level. (p. 8) w SQUELCH CONTROL [SQL] Sets the squelch threshold level. (p. 8) e TRANSMIT POWER SWITCH [H/L] Toggles high and low power when pushed. (p. 8)
Some channels are set to low power only.
Push for 3 sec. to enter call channel programming condition when call channel is selected. (p. 9) While pushing [H/L], enters memory channel name programming condition. (p. 9) Enters set mode when pushed while turning power ON. (p. 14) Y Z y CHANNEL UP/DOWN SWITCHES [Y]/[Z] Push to select the operating channels, set mode contents, etc. While pushing [H/L], push [Y]/[Z] to adjust the brightness of the LCD and switch backlight. u SCAN SWITCH [SCN] (p. 13) Starts and stops normal or priority scan when tag channels are programmed. i TAG CHANNEL SWITCH (p. 13) Push [TAG] to set the displayed channel as a tag (scanned) channel. While pushing [H/L], push for 3 sec. to clear all tag channels.
While pushing this switch, other switches perform secondary functions. r CHANNEL/DUALWATCH/TRI-WATCH SWITCH [CH] Exits from Channel 16 or call channel when pushed. (p. 6) While pushing [H/L], selects channel group when pushed. (p. 7) 2
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I Function display

!0 q w e r t y u
y ATIS INDICATOR ATIS appears when the ATIS encoder is activated.
The ATIS encoder is available for Germany and Holland versions only.
u DUPLEX INDICATOR (p. 7) Appears when a duplex channel is selected. i CHANNEL NAME INDICATOR Memory channel name appears if programmed. (p. 9) scrolls when the battery voltage drops to approx. 10 V DC or below. appears during dualwatch; appears during triwatch. (p. 10) o CHANNEL GROUP INDICATOR (p. 7) Indicates whether an International (I) or U.S.A (U) channel is selected.
USA channel group is available for U.K. and Italy versions only.
q TRANSMIT INDICATOR (p. 8) TX appears while transmitting. w BUSY INDICATOR (p. 8) BUSY appears when receiving a signal or when the squelch opens. e TAG CHANNEL INDICATOR (p. 13) Appears when a tag channel is selected. r CALL CHANNEL INDICATOR CALL appears when the call channel is selected. (p. 6) t LOW POWER INDICATOR (p. 8) LOW appears when low power is selected.

!0 CHANNEL NUMBER READOUT Indicates the selected operating channel number.
A appears when a simplex channel is selected. (p. 7)
In set mode, indicates the selected condition. (p. 15)
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e CHANNEL 16/CALL CHANNEL SWITCH [16/C] Same as the [16] switch on the front panel. (p. 2) Selects Channel 16 when pushed. (p. 6) Selects call channel when pushed for 1 sec. (p. 6)

I Microphone

Microphone
Push for 3 sec. to enter call channel programming condition when call channel is selected. (p. 9) While pushing [H/L], enters memory name programming condition. (p. 9)
Microphone lock function q PTT SWITCH [PTT] Push and hold to transmit; release to receive. (p. 8) Y Z w CHANNEL UP/DOWN SWITCHES [Y]/[Z] Push either switch to change the operating memory channel, set mode contents, etc. The microphone lock function electrically locks the [Y]/[Z] and [16/C] switches on the microphone. This prevents accidental channel changes and accidental function access. While pushing [16] on the microphone, turn power ON to toggle the microphone lock function ON and OFF.
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Blank page

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BASIC OPERATION

Call channel
Each regular channel group has a separate leisure-use call channel. The call channel is monitored during tri-watch. The call channels can be programmed (p. 9) and are used to store your most often used channels in each channel group for quick recall. Push [16] for 1 sec. to select the call channel of the selected channel group.
CALL and call channel number appear. Each channel group may have an independent call channel after changing a call channel. (U.K. version only)

I Channel selection

Channel 16
Channel 16 is the distress and safety channel. It is used for establishing initial contact with another station and for emergency communications. Channel 16 is monitored during both dualwatch and tri-watch. While standing by, you must monitor Channel 16. Push [16] momentarily to select Channel 16.
Output power turns to 25W automatically, whenever Channel 16 is selected. For example, when selecting Channel 16 via the dial, dualwatch/tri-watch or a scan stops at Channel 16, etc.
Push [CH] to return to the condition before selecting Channel 16, or push [Y]/[Z] to select an operating channel.
Push [CH] to return to the condition before selecting call channel, or push [Y]/[Z] to select an operating channel.

Memory channels can be tagged with alphanumeric names of up to 10 characters each. Capital letters, small letters, numerals, some symbols (! " # $ % & ' ( ) + , . ) and spaces can be used. q Select the desired memory channel.
Cancel dual watch, tri-watch or scan in advance.
w While pushing [H/L], push [16] to edit memory channel name.
A cursor appears and blinks.
e Push [16] again for 3 sec. (until long beep changes to 2 short beeps) to enter call channel programming condition.
Channel number starts ashing.
r Push [Y]/[Z] to select the desired channel. t Push [16] to program the displayed channel as the call channel.
Push [CH] to cancel. The channel number stops ashing.
e Select the desired character by pushing [Y]/[Z].
Push [CH] or [H/L] for cursor movement.
r Push [16] to input and set the name.

TAG CALL D

Push [H/L] to cancel. The cursor disappears.
t Repeat steps q to r to program other memory channel names, if desired.
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DUALWATCH/TRI-WATCH

I Operation
q Select the desired operating channel. w Select dualwatch or tri-watch in set mode. (p. 15) e Push [CH] for 1 sec. to start dualwatch or tri-watch.
appears during dualwatch; appears during tri-watch. Beep tone sounds when a signal is received on Channel 16.

I Description

Dualwatch monitors Channel 16 while you are receiving another channel; tri-watch monitors Channel 16 and the call channel while receiving another channel. DUALWATCH/TRI-WATCH SIMULATION
If a signal is received on Channel 16, dualwatch/tri-watch pauses on Channel 16 until the signal disappears. If a signal is received on the call channel during tri-watch, tri-watch becomes dualwatch until the signal disappears. To transmit on the selected channel during dualwatch/tri-watch, push and hold [PTT].
r To cancel dualwatch/tri-watch, push [CH] again.

Dualwatch

Tri-watch
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[Example] Operating dualwatch on INT Channel 25 Operating tri-watch on INT Channel 25

Dualwatch starts.

Tri-watch starts.
Signal received on Channel 16 takes priority.
Signal is received on call channel.
Tri-watch becomes dualwatch and monitors Channel 16 while receiving signal.

TAG TAG

Dualwatch resumes after the signal disappears.
Tri-watch resumes after the signal disappears.
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SCAN OPERATION

I Scan types
Scanning is an efcient way to locate signals quickly over a wide frequency range. The transceiver has priority scan and normal scan. Set the tag channels (scanned channel) before scanning. Clear the tag channels which inconveniently stop scanning, such as channels used for digital communication. Choose priority or normal scan in set mode. (p. 15)

PRIORITY SCAN

CH 01 CH 02

NORMAL SCAN

Priority scan searches through all tag channels in sequence while monitoring Channel 16. When a signal is detected on Channel 16, scan pauses until the signal disappears; when a signal is detected on a channel other than Channel 16, scan becomes dualwatch until the signal disappears. 12
Normal scan, like priority scan, searches through all tag channels in sequence. However, unlike priority scan, Channel 16 is not checked unless Channel 16 is set as a tag channel.
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I Setting tag channels

For more efficient scanning, add desired channels as tag channels or clear tag channels for unwanted channels. Channels set as non-tag channels will be skipped during scanning. Tag channels can be assigned to each channel group independently. q While pushing [H/L], push [CH] one or more times, select the desired channel group, if desired. (U.S.A. channel group is available for UK and Italy versions only.) w Select the desired channel to set as a tag channel. e Push [TAG] to set the displayed channel as a tag channel.

TAG appears in the function display.

I Starting a scan

Set scan type (priority or normal scan) and scan resume timer in advance using set mode. (p. 15) q Set tag channels as described at left. w While pushing [H/L], push [CH] one or more times, select the desired channel group, if desired. (U.S.A. channel group is available for UK and Italy versions only.) e Push [SCN] to start priority or normal scan.
SC 16 or SCAN appears in the function display. When a signal is detected, scan pauses until the signal disappears or resumes after pausing 5 sec., according to set mode setting. (Channel 16 is still monitored during priority scan.) Push [Y]/[Z] to check the scanning tag channels, to change the scanning direction or resume the scan manually. 16 ashes and a beep tone sounds when a signal is received on Channel 16 during priority scan.
r To cancel the tag channel setting, repeat e.

TAG disappears.

Clearing all tag channels in the selected channel group While pushing [H/L], push [TAG] for 3 sec. to clear all tag channels in the channel group. [Example]: Starting a priority scan.
r To stop the scan, push [SCN].
SC 16 or SCAN disappears.

Push [SCN]

Scan starts.
When a signal is received
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SET MODE

I Set mode programming
Set mode is used to change the conditions of some of the transceivers functions. NOTE: Available functions may differ depending on dealer setting.

Entering set mode

q Turn power OFF. w While pushing [16], turn power ON to enter set mode. e After the display appears, release [16]. r Push [16] to select the desired item, if necessary. t Push [Y]/[Z] to select the desired condition of the item. y Turn power OFF, then ON again to exit set mode.

SET MODE CONSTRUCTION

Scan mode

Scan resume timer

Dual/tri watch

LCD contrast Beep tone

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I Set mode items

The scan mode can be selected as a normal scan or priority scan. (p. 12)

Dualwatch/tri-watch

This item can be selected as dualwatch or tri-watch. (p. 10)
Dual watch (default) Priority scan (default) Normal scan
Beep tone Scan resume timer
The scan resume timer can be selected as a pause (OFF) or timer scan (ON). When OFF is selected, the scan pauses until the signal disappears. When ON is selected, the scan pauses 5 sec. and resumes even if a signal is being received on channels except for Channel 16. You can select silent operation by turning beep tones OFF, or you can have confirmation beeps sound at the push of a switch by turning beep tones ON.

Beep tone ON (default)

Beep tone OFF

LCD contrast

Scan timer OFF (default) Scan timer ON
This item adjusts the contrast of the LCD in 4 steps.

LCD contrast 3 (default)

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CONNECTIONS AND MAINTENANCE

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 Unpacking

The following accessories are supplied: Qty. q Mounting bracket.. 1 w DC power cable (OPC-891).. 1 e Microphone hanger... 1 r Microphone hanger cable* (OPC-1096 : Black or OPC-1097 : White).. 1 t Mounting bracket knobs.. 2 y Microphone hanger screws (mm).. 2 u Mounting screws (mm)... 2 i Flat washers (M5)... 2 o Spring washers (M5).. 2 *Depending on version.

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.

I Cleaning

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

i w r o

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I Connections

e ANTENNA CONNECTOR Connects a marine VHF antenna with a PL-259 connector to the transceiver.
CAUTION: Transmitting without an antenna may
damage the transceiver. r EXTERNAL SPEAKER JACK Connects to an external speaker.
See Options on p. 24 for available external speakers.
q DC POWER CONNECTOR Connects the supplied DC power cable from this connector to an external 12 V battery.
MICROPHONE HANGER Rest the supplied microphone on the hanger when not in use. Connect the OPC-1096/1097* to the antenna connector and microphone to use the microphone hanger function. *Depending on version.
Tighten the antenna connector screw at fixing torque 0.7 Nm (6.9 kgm). If the microphone hanger function is used, Channel 16 is selected automatically when the supplied microphone is rested on the hanger.
CAUTION: After connecting the DC power cable and
external speaker jack, cover the connector and jack as shown below to avoid water seeping into the transceiver.
w EXTENSION JACK Connects to optional DS-100 (#02) DSC CONTROLLER.

OPC-1096/1097

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I Mounting the transceiver
Using the supplied mounting bracket
The universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting. Mount the transceiver securely with the 2 supplied screws (mm) 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. EXAMPLE

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.
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CONNECTIONS AND MAINTENANCE Using the optional mounting bracket
An optional MB-69 FLUSH MOUNT is available for mounting the transceiver to a at surface such as an instrument panel.
e Attach the clamps on either side of the transceiver with 2 supplied bolts (mm).
Make sure that the clamps align parallel to the transceiver body.
q Using the template on the last page, carefully cut a hole into the instrument panel (or wherever you plan to mount the transceiver). w Slide the transceiver through the hole as shown below. r Tighten the end bolts on the clamps (rotate clockwise) so that the clamps press firmly against the inside of the instrument control panel. t Tighten the locking nuts (rotate counterclockwise) so that the transceiver is securely mounted in position as below. y Connect the antenna and control cable, then return the instrument control panel to its original place.
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I Dimensions

32.1 mm 86.5 mm 23 mm

153 mm

136 mm
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TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE
Bad connection to the power supply. Squelch level is too deep. Volume level is too low. Speaker has been exposed to water.

SOLUTION

Set squelch to the threshold point. Set [VOL] to a suitable level. Drain water from the speaker. Change channels. Push [H/L] to select high power. Set the desired channels as TAG channels. Turn the beep tone ON in set mode.
p. 8 p. 8 pgs. 8, 23 p. 8 p. 13 p. 15
No power comes ON. No sound comes from the speaker.
Check the connection to the transceiver. p. 17
Transmitting is impossible, Some channels are for low power or or high power cannot be selected. Scan does not start. No beep sounds. receive only. The output power is set to low. TAG channel is not programmed. Beep tone is turned OFF.
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CHANNEL LIST

International channels
CH Frequency (MHz) Transmit 156.050 156.100 156.150 156.200 156.250 156.300 156.350 156.400 156.450 156.500 Receive 160.650 160.700 160.750 160.800 160.850 156.300 160.950 156.400 156.450 156.500 CH Frequency (MHz) Transmit 156.550 156.600 156.650 156.700 156.800 156.900 156.950 157.000 Receive 156.550 156.600 156.650 156.700 156.750 156.800 156.850 161.500 161.550 161.600 CH Frequency (MHz) Transmit 157.050 157.100 157.150 157.200 157.250 157.300 157.350 157.400 156.025 156.075 Receive 161.650 161.700 161.750 161.800 161.850 161.900 161.950 162.000 160.625 160.675 CH 71 Frequency (MHz) Transmit 156.125 156.175 156.225 156.275 156.325 156.375 156.425 156.475 156.575 Receive 160.725 160.775 160.825 160.875 160.925 156.375 156.425 156.475 156.525 156.575 CH 74 Frequency (MHz) Transmit 156.625 156.675 156.725 Receive 156.625 156.675 156.725 156.775 156.825 156.875 161.525 161.575 161.625 161.675 CH 88
Receive 161.725 161.775 161.825 161.875 161.925 157.375 157.425
Frequency (MHz) Transmit 157.125 157.175 157.225 157.275 157.325 157.375 157.425
75 156.156.156.875 156.925 156.975 157.025 157.075

15 156.156.850

70 156.525
USA channels (for U.K. version only)
CH Frequency (MHz) Transmit ----156.300 156.400 156.450 156.500 156.550 Receive 156.050 --156.150 --156.250 156.300 156.350 156.400 156.450 156.500 156.550 CH 16 Frequency (MHz) Transmit 156.600 156.700 156.800 Receive 156.600 156.650 156.700 156.750 156.800 156.850 156.900 156.950 161.600 157.000 157.050 CH Frequency (MHz) Transmit Receive 157.100 157.150 161.800 161.850 161.900 161.950 162.000 157.850 156.075 --156.175 CH Frequency (MHz) Transmit Receive 156.225 156.275 156.325 156.375 156.425 156.475 156.525 156.575 156.625 156.675 156.725 CH 77 Frequency (MHz) Transmit 156.875 Receive 156.875 156.925 156.975 157.025 157.075 157.125 157.175 161.825 157.225 161.875 157.275 CH 88 Frequency (MHz) Transmit 157.325 157.375 157.425 Receive 161.925 157.325 161.975 157.375 162.025 157.425

01A 156.050 --11

22A 157.100 23A 157.157.200 157.250 157.300 157.350 157.400
64A 156.225 65A 156.275 66A 156.156.74 156.425 156.475 156.575 156.625 156.675 156.725

13 156.156.156.850 18A 156.900 19A 156.157.000 20A 157.000 21A 157.050
78A 156.925 79A 156.975 80A 157.025 81A 157.075 82A 157.125 83A 157.85 157.225 157.275 84A 157.225 85A 157.275
86A 157.325 87A 157.375 88A 157.425
03A 156.150 05A 156.250 07A 156.350
37A 157.850 61A 156.075 ---63A 156.175

power only.

Receive

only. 23

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GENERAL

SPECIFICATIONS AND OPTIONS

I Options

DS-100 (#02) DSC CONTROLLER

: 156.025157.425 MHz

(156.00161.450MHz)*

I Specications

Frequency coverage Transmit Receive
When the DS-100 (#02) is installed, the transceiver conforms to DSC class D for marine digital communications.

156.025162.025 MHz

MB-69 FLUSH MOUNT
For mounting the transceiver to a panel.
(156.00163.425MHz)* * Frequency range that may be subject to licensing conditions.
Mode Channel spacing Current drain (at 13.8 V) Power supply requirement Frequency stability Dimensions
(Projection not included)
: FM (16K0G3E)/DSC (16K0G2B) : 25 kHz : TX high 6.0 A max. Max. audio 1.2 A max. : 13.8 V DC : 1.5 kHz (20C to +60C) : 153(W) 67(H) 141.6(D) mm : 900 g : 25 W and 1 W : Variable reactance phase modulation : 5.0 kHz : Less than 0.25 W

SP-5 EXTERNAL SPEAKER

A large, external speaker for superior audio output.

SP-10 EXTERNAL SPEAKER

A compact, external speaker for easy installation.

Weight

TRANSMITTER
Output power Modulation system Max. frequency deviation Spurious emissions

RECEIVER

Receive system : Double conversion superheterodyne Sensitivity (20 dB SINAD) : Less than 2 dB EMF (typical) Squelch sensitivity : Less than 0 dB EMF Intermodulation rejection ratio : More than 68 dB Spurious response rejection ratio: More than 70 dB Adjacent channel selectivity : More than 70 dB Audio output power : 2 W at 10% distortion with a 4 load
All stated specications are subject to change without notice or obligation.
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MB-69 TEMPLATE

Unit: mm

Cut here

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DECLARATION OF CONFORMITY

We Icom Inc. Japan

1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, Japan Declare on our sole responsibility that this equipment complies with the essential requirements of the Radio and Telecommunications Terminal Equipment Directive, 1999/5/EC, and that any applicable Essential Test Suite measurements have been performed. Kind of equipment: Type-designation: VHF MARINE TRANSCEIVER

Dsseldorf 31th May 2001

Place and date of issue

Icom (Europe) GmbH

Himmelgeister strae 100 D-40225 Dsseldorf
Authorized representative name
Version (where applicable): This compliances is based on conformity with the following harmonised standards, specifications or documents: i) EN 301 025-1 V1.1.2 (2000-08) ii) EN 301 025-2 V1.1.1 (2000-08) iii) EN 301 025-3 V1.1.1 (2001-05) iv) EN 300 162-2 V1.1.2 (2000-12) v) EN 300 162-3 V1.1.1 (2001-05) vi) EN vii) EN viii) EN 300 698-2 V1.1.1 ( 2000-8) ix)
T. Maebayashi General Manager

Signature

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Count on us!

< Intended Country of Use >

GER AUT GBR IRL FRA SUI

NED BEL LUX ESP POR

ITA GRE SWE DEN FIN

A-6065H-1EU-w Printed in Japan 2001 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan

SERVICE MANUAL

VHF MARINE TRANSCEIVER
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
S-13808IZ-C1M 2001 Icom Inc.

INTRODUCTION

This service manual describes the latest service information for the IC-M401EURO VHF MARINE TRANSCEIVER at the time of publication. 2 versions of the IC-M401EURO have been designed. This service manual covers each version.
MODEL VERSION UK EUR HOL FRG UK-1 EUR-1 HOL-1 FRG-1 COLOR BLACK

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.

IC-M401EURO

To upgrade quality, anyelectrical or mechanical parts and internal circuits are subject to change without notice or obligation.
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan Phone : 5302 Fax : 0013 URL : http://www.icom.co.jp/world/index.html

ORDERING PARTS

Be sure to include the following four points when ordering replacement parts: 1. 2. 3. 4. 10-digit order numbers Component part number and name Equipment model name and unit name Quantity required

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.

Icom America Inc.

< 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

Icom (Europe) GmbH

Communication Equipment Himmelgeister Str. 100, D-40225 Dsseldorf, Germany Phone : Fax : URL : http://www.icomeurope.com

Icom Spain S.L

Crta. de Gracia a Manresa Km. 14,Sant Cugat del Valles Barcelona, SPAIN Phone : (93) 70 Fax : (93) 46 URL : http://www.icomspain.com

Icom Canada

Glenwood Centre #150-6165 Highway 17 Delta, B.C., V4K 5B8, Canada Phone : (604) 952-4266 Fax : (604) 952-0090 URL : http://www.icomcanada.com

Icom (UK) Ltd.

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : Fax : URL : http://www.icomuk.co.uk
Icom (Australia) Pty. Ltd.
A.B.N. 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Phone : 0666 Fax : 0022 URL : http://www.icom.net.au

<SAMPLE ORDER>

1110003200 S.IC TA31136FN IC-M401EURO MAIN UNIT 5 pieces 8810006050 Screw Icom screw E7 IC-M401EURO Chassis 10 pieces

Icom France S.a

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

Icom New Zealand

146A Harris Road, East Tamaki, Auckland, New Zealand Phone : 4062 Fax : 4708 URL : http://www.icom.co.nz

Asia Icom Inc.

6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C. Phone : (02) Fax : (02) 2559 1874
Addresses are provided on the inside back cover for your convenience.

TABLE OF CONTENTS

SECTION SECTION SECTION SECTION
4-1 4-2 4-3 4-4 4-5 4-6 4-7
SPECIFICATIONS INSIDE VIEWS DISASSEMBLY INSTRUCTIONS CIRCUIT DESCRIPTION
RECEIVER CIRCUITS. TRANSMITTER CIRCUITS. PLL CIRCUITS. ATIS AND DSC CIRCUITS. LOGIC CIRCUITS. POWER SUPPLY CIRCUITS PORT ALLOCATIONS..4-1.4-2.4-3.4-4.4-4.4-4.4-5

SECTION

5-1 5-2 5-3 5-4

ADJUSTMENT PROCEDURES

PREPARATION. PLL ADJUSTMENTS. TRANSMITTER ADJUSTMENTS RECEIVER ADJUSTMENTS.5-1.5-2.5-3.5-3

6-1 6-2

PARTS LIST
IC-M401EURO.6-1 HM-132.6-5

7-1 7-2

MECHANICAL PARTS AND DISASSEMBLY
IC-M401EURO.7-1 HM-132.7-3

SECTION SECTION

9-1 9-2 9-3 9-4 9-5
SEMI-CONDUCTOR INFORMATION BOARD LAYOUTS
VR-A BOARD. VR-B BOARD. HM-132. LOGIC BOARD MAIN UNIT.9-1.9-1.9-1.9-2.9-4

10 BLOCK DIAGRAM 11

11-1 11-2 11-3

VOLTAGE DIAGRAM

LOGIC BOARD.11-1 MAIN UNIT.11-2 HM-132.11-3

SECTION 1 SPECIFICATIONS

GENERAL
Frequency coverage Mode Power supply requirement Usable temperature range Frequency stability Current drain (at 13.8 V DC) Antenna impedance Input impedance (MIC) Output impedance (Audio) Dimensions (projections not included) Weight : 156.025157.425 MHz (Tx) 156.300162.025 MHz (Rx) : 16K0G3E (FM) : 13.8 V DC (negative ground) : 20C to +60C; 4F to +140F : 10 ppm (20C to +60C; 4F to +140F) : Transmit Receive : 600 :4 : 153(W)67(H)140(D) mm; 6(W)258(H)535(D) in : 900 g; 2 lb at 25 W max. audio 6.0 A (approx.) 1.2 A (approx.)

: 50 (nominal)

TRANSMITTER
Output power (at 13.8 V DC) Modulation Maximum frequency deviation Frequency stability Spurious emissions Residual modulation Audio harmonic distortion Audio frequency response : High Low : 5.0 kHz : Less than 0.25 W : 70 dBc : 40 dB : Less than 10% at 60% 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 frequency responce : Double conversion superheterodyne system : 1st 2nd 21.7 MHz 450 kHz
: Less than 2 dB emf typical at 20 dB SINAD (With CCITT) : Less than 0 dB emf typical : More than 70 dB : More than 70 dB : More than 68 dB : More than 40 dB : +1 dB to 3 dB of 6 dB octave from 300 Hz to 3000 Hz
Specifications are measured in accordance with EN301 025-1, -2, -3 All stated specifications are subject to change without notice or obligation.

VHF MARINE CHANNEL LIST

Channel No. USA INT 01 01A 03A 05A 06 07A 12 13* 14 15*17*
Frequency (MHz) Transmit Receive 156.050 156.050 156.100 156.150 156.150 156.200 156.250 156.250 156.300 156.350 156.350 156.400 156.450 156.500 156.550 156.600 156.650 156.700 156.750 156.800 156.850 156.900 156.900 156.950 156.950 157.000 157.000 157.050 157.050 160.650 156.050 160.700 160.750 156.150 160.800 160.850 156.250 156.300 160.950 156.350 156.400 156.450 156.500 156.550 156.600 156.650 156.700 156.750 156.800 156.850 161.500 156.900 161.550 156.950 161.600 157.000 161.650 157.050
Channel No. USA INT 22 22A 23 23A 28 60A 61 61A 62 62A 63 63A 64 64A 65 65A 66 66A 67* 70* 71 72
Frequency (MHz) Transmit Receive 157.100 157.100 157.150 157.150 157.200 157.250 157.300 157.350 157.400 156.025 156.025 156.075 156.075 156.125 156.125 156.175 156.175 156.225 156.225 156.275 156.275 156.325 156.325 156.375 156.425 156.475 161.700 157.100 161.750 157.150 161.800 161.850 161.900 161.950 162.000 160.625 156.025 160.675 156.075 160.725 156.125 160.775 156.175 160.825 156.225 160.875 156.275 160.925 156.325 156.375 156.425 156.475 156.525 156.575 156.625
Channel No. USA INT 77 78A 79 79A 80 80A 81 81A 82 82A 83 83A 84 84A 85 85A 86 86A 87 87A 88 88A 78
Frequency (MHz) Transmit Receive 156.675 156.725 156.775 156.825 156.875 156.925 156.925 156.975 156.975 157.025 157.025 157.075 157.075 157.125 157.125 157.175 157.175 157.225 157.225 157.275 157.275 157.325 157.325 157.375 157.375 157.425 157.425 156.675 156.725 156.775 156.825 156.875 161.525 156.925 161.575 156.975 161.625 157.025 161.675 157.075 161.725 157.125 161.775 157.175 161.825 157.225 161.875 157.275 161.925 157.325 161.975 157.375 162.025 157.425

14 15*17* 18

18A 19 19A 20 20A 21 21A 20

69 70* 71 72

156.525 156.575 156.625
*1 Low power only, *2 Receive only NOTE: USA channels for U.K. and Italy versions only.

SECTION 2

MAIN UNIT

INSIDE VIEWS

AF power amplifier (IC9: LA4425A)
Pre-driver (Q10: 2SC3775 3)
Reference oscillator (X2: CR-659) YGR amplifier (Q11: 2SC3268) Antenna switching circuit VCO circuit

4-2-2 MODULATION CIRCUIT (MAIN UNIT)
The modulation circuit modulates the VCO oscillating signal (RF signal) using the microphone audio signals. Audio signals from the splatter filter (IC10B) pass through the frequency deviation adjustment pot (R138) and are then applied to the modulation circuit (D2, D3, D4) to change the reactance of D2, D3, D4 and modulate the oscillated signal at the VCO (Q5, Q6).
4-2-3 DRIVE AMPLIFIER CIRCUIT (MAIN UNIT)
The drive amplifier circuit amplifies the VCO oscillating signal to a level needed at the power amplifier.
4-1-6 SQUELCH CIRCUIT (MAIN UNIT AND LOGIC BOARD)
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 adjustment pot (R16), 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 14 as the SQL signal. The SQL signal is applied to the CPU (LOGIC board; IC1, pin 90) after being passed through the amplifier (IC13, pins 1, 4). The CPU analyzes the noise condition and outputs the RMUTM, PTTM signals to toggle the AF mute switches (IC12A, IC12B).
The VCO output is buffer-amplified by Q7 and Q9, and is then applied to the Tx/Rx switch (D6). The transmit signal from the Tx/Rx switch is amplified to the pre-drive (Q10) and YGR (Q11) amplifiers to obtain an approximate 300 mW signal level. The amplified signal is then applied to the RF power amplifier (IC3).
4-2-4 POWER AMPLIFIER CIRCUIT (MAIN UNIT)
The power amplifier circuit amplifies the driver signal to an output power level. IC3 is a power module which has amplification output capabilities of about 35 W with 300 mW input. The output from IC3 (pin 4) is passed through the antenna switching circuit (D10) and is then applied to the antenna connector via the low-pass filter.

4-2 TRANSMITTER CIRCUITS

4-2-1 MICROPHONE AMPLIFIER CIRCUIT (MAIN UNIT)
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 (IC11A) via the analog switch (IC12B, pins 6, 5). A capacitor (C159) and resistor (R121) are connected to the amplifier to obtain the pre-emphasis characteristics.

4-2-5 APC CIRCUIT (MAIN UNIT)
The APC circuit stabilizes transmit output power. The RF output signal from the power amplifier (IC3) is detected at the power detector circuit (D8, D9, L12) and is then applied to one of the differential amplifier inputs (Q15, pin 5) via the High/Low control circuit (R71, Q16). The applied voltage controls the differential amplifier output (Q15, pin 2) and the bias voltage control (Q12). Thus the APC circuit maintains a constant output power.

AF AMPLIFIER CIRCUIT

External SP Vcc PWR AMP IC9 (VR-A board) AF MUTE HPF C140 "DET" signal from the FM IF IC (IC1, pin 9) de-emphasis circuit R101
Internal SP (LOGIC board)

4-3 PLL CIRCUITS

4-3-1 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. IC2 on the MAIN unit is a dual PLL IC which controls both VCO circuits for Tx and Rx, and contains a prescaler, programmable counter, programmable divider, phase detector, charge pump, etc.
4-3-2 TX AND RX LOOP (MAIN UNIT)
The generated signal at the VCO (Q4, Q5, Q6, D1D4) enters the PLL IC (IC2, 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 (R29R31, R41, C41, C42, C50, C51), and is then applied to varactor diodes (D3, D4) of the VCO to stabilize the oscillated frequency. The lock voltage from the loop filter is amplified at the buffer amplifier (Q7) and then applied to the RF circuit.
The PLL circuit, using a one chip PLL IC (MAIN unit; IC2), 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 for Tx and Rx. The reference frequency (21.25 MHz) is oscillated at X2 (MAIN unit).
4-3-4 VCO CIRCUIT (MAIN UNIT)

4-5 LOGIC CIRCUITS (LOGIC BOARD)
CPU IC1 is an 8 bit signal chip micro-computer and contains LCD driver, serial I/O, timer, A/D converter, programmable I/O, ROM and RAM. SYSTEM CLOCK CIRCUIT X1 is a ceramic oscillator and oscillate 9.8304 MHz system clock for the CPU (IC1). RESET CIRCUIT IC6 is a reset IC. When turn power ON, IC6 outputs a reset signal (LOW pulse) to the CPU (IC1, pin 15) via the RES line. LOW BATTERY DETECTOR VCC voltage is divided by R74, R75 and is applied to the low battery detector section in the CPU (IC1, pin 91) via the LBAT line. DIMMER CIRCUIT CPU (IC1), Q2, Q3 and Q4 are dimmer circuit and control the 4 steps the LCD backlight (DS3DS8).

4-7 PORT ALLOCATIONS

4-7-1 CPU (LOGIC BOARD; IC1)
Pin Port number name Description Outputs control signal for the LCD contrast. CONT1 CONT2 CONT31 BEEPM CH16 CH H/L HANG PCK PSTB PDATA ICFC BPLVL ECK EDA HI/LO RRXD RTXD BPFV CONT1 CONTRAST LIGHT DEEP 94 PTT Pin Port number name 93 KEYM Description Input port for the HM-132 functions. 2.02 V: [UP] is pushed. 3.00 V: [DN]] is pushed. 3.84 V: [16/C] is pushed. Input port for the PTT switch from HM132. Low: While PTT is pushed. Input port for the TAG switch. Low: While TAG switch is pushed. Input port for the SCN switch. Low: While SCN switch is pushed. Input port for the UP switch. Low: While UP switch is pushed. Input port for the DOWN switch. Low: While DOWN switch is pushed. Input port for the PLL unlock signal. Low: While PLL is locked.
Outputs beep audio signal. Input port for the CH16 switch. Low: While CH16 switch is pushed. Input port for the CH switch. Low: While CH switch is pushed. Input port for the H/L switch. Low: While H/L switch is pushed. Input port for the MIC hanging signal. Low: While MIC is pull-up. Outputs clock signal to the PLL IC (MAIN unit; IC2, pin 4). Outputs strobe signals to the PLL IC (MAIN unit; IC2, pin 3). Outputs data signals to the PLL IC (MAIN unit; IC2, pin 5). Outputs control signal to swtich NMEA or ICF3. Outputs beep volume control signal. Low: Beep audio is maximum. Outputs clock signal for the EEPROM (IC2, pin 6). I/O port for the EEPROM data signals. Output port for RF output power (High or Low) select signal. Input port for the cloning data. Output port for cloning data. Outputs bandpass filter select signals. Low: Receiving more than 160 MHz. High: Receiving less than 160 MHz. Outputs transmit mute signal. High: While transmitting. Input port for DS-100 data. Outputs cloning data signal. Input port for the squelch volume level. Input port from the FM IF IC (MAIN unit; IC1) for the squelch operation. Input port for the connected power supply voltage detection (low battery indicator). Input port for TX LED control signal. 13 SEND TAG SCN UP DN UNLK

4-7-2 I/O EXPANDER IC (LOGIC BOARD; IC3)
Pin Port number name 4 Description
Outputs the AF mute swtich (MAIN RMUTM unit; IC5) control signal for main body. Low: While squelched PTTM Outputs main microphone (HM-132) select signal to the analog swtich (IC4) while intercom operation. Outputs the T5 regulator (MAIN unit; Q24, Q25) control signal. High: While transmitting Outputs the R5 regulator (MAIN unit; Q22, Q23) control signal. High: While receiving.
TMUT NMEAI NMEAO SQLV SQL

LBAT TXDET

SECTION 5 ADJUSTMENT PROCEDURES

5-1 PREPARATION

s REQUIRED TEST EQUIPMENT

EQUIPMENT

DC power supply

GRADE AND RANGE

Output voltage Current capacity Measuring range Frequency range Impedance SWR : 13.8 V DC : 10 A or more : : : : 150 W 100300 MHz 50 Less than 1.2 : 1
Audio generator Standard signal generator (SSG) Oscilloscope AC millivoltmeter External speaker Attenuator Dummy load
Frequency range Measuring range Frequency range Output level Frequency range Measuring range Measuring range Input impedance Capacity Power attenuation Capacity Resistance 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 : 50 : 100 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 Input impedance Frequency range Measuring range : 30300 MHz : 0 to 10 kHz : 50 k/V DC or better : 10 M/V DC or better : 1 kHz 10 % : 1100 %
FM deviation meter DC voltmeter Digital multi-meter Distortion meter

CONNECTIONS

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

Red line Black line

5-2 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. 1.8 V VALUE ADJUSTMENT POINT UNIT ADJUST Verify
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 Rear Panel Loosely couple the frequency counter to the antenna connector.

156.8000 MHz

Reference frequency adjustment
PLL lock voltage check point
5-3 TRANSMITTER ADJUSTMENTS
ADJUSTMENT OUTPUT POWER ADJUSTMENT CONDITION MEASUREMENT UNIT 1 Operating channel : ch16 Output power : High Transmitting Rear Panel Rear Panel LOCATION Connect an RF power meter to the antenna connector. Connect an FM deviation meter to the antenna connector through an attenuator. 22.5 W VALUE ADJUSTMENT POINT UNIT MAIN ADJUST R71
FREQUENCY 1 Operating channel : ch16 Output power : Low DEVIATION Connect an audio generator to J4 (pin 3) on the MAIN unit with an AC millivoltmeter and set as: Frequency : 1 kHz Level : 20 mV Set an FM deviation meter as: HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (PP)/2 Transmitting

4.3 kHz

5-4 RECEIVER ADJUSTMENTS
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 : 3.2 V* (97 dBm) Modulation : 1 kHz Deviation : 3.5 kHz Receiving SQUELCH MAIN LOCATION Connect the distortion meter to the [EXT SP] jack with a 4 load. Less than 0.56 V VALUE ADJUSTMENT POINT UNIT ADJUST Verify
1 Operating channel : ch16 MAIN [SQUELCH] control: Max. counterclockwise Connect an SSG to the antenna connector and set as: Frequency : 156.800 MHz Level : 0.71 V* (110 dBm) Modulation : 1 kHz Deviation : 3.5 kHz Receiving
Connect a DC voltmeter to the check point CP2.
*This output level of a standard signal generator (SSG) is indicated as SSGs open circuit.

Output power adjustment

Frequency deviation adjustment

Squelch level adjustment

Squelch level check point
Audio generator 300 Hz to 3 kHz AC millivoltmeter mV

[PTT] +

SECTION 6

6-1 IC-M401EURO

[LOGIC BOARD]

REF NO.

IC1 IC2 IC3 IC4 IC6 IC7

DESCRIPTION REF NO.

R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R81 R83 R84 R85 R86 R87 R88 R89

ORDER NO.

S.IC S.IC S.IC S.IC S.IC S.IC
7030003680 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

C261 C262 C264 C265 C266 C267 C268 C270 C271 C272 C275 C276 C277 C278 C279 C280 C281 C282 C283 C284 C285 C286 C287 C288 C289 C290 C291 C292 C293 C294 C295 C296 C297 C298 C299 C300

6-2 MH-132

S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.TANTALUM 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 S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC C1608 JB 1H 102K-T-A C1608 CH 1H 470J-T-A C1608 CH 1H 470J-T-A C1608 CH 1H 470J-T-A C1608 JB 1H 102K-T-A C1608 CH 1H 180J-T-A C1608 CH 1H 180J-T-A C1608 CH 1H 390J-T-A C1608 CH 1H 180J-T-A ECST1AY106R C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N C1608 JB 1H 102K-T-A C1608 CH 1H 470J-T-A C1608 JB 1C 104KT-N GRM42-6 CH 040C 500PT C1608 CH 1H 470J-T-A C1608 JB 1H 472K-T-A C1608 CH 1H 100D-T-A C1608 CH 1H 221J-T-A C1608 CH 1H 100D-T-A C1608 CH 1H 221J-T-A C1608 CH 1H 100D-T-A C1608 CH 1H 221J-T-A C1608 CH 1H 100D-T-A C1608 CH 1H 221J-T-A C1608 CH 1H 100D-T-A C1608 CH 1H 221J-T-A C1608 JB 1H 471K-T-A C1608 CH 1H 221J-T-A C1608 CH 1H 010B-T-A C1608 CH 1H 820J-T-A C1608 CH 1H 820J-T-A C1608 JB 1H 102K-T-A C1608 JB 1C 104KT-N GHM1030 R 102K 630PT

4030011600 4030017200

R1 R2 R3 R4
RESISTOR RESISTOR RESISTOR RESISTOR
R20J R20J R20J R20J 12 k 6.8 k 15 k 33 k

4010008030 CERAMIC

DD104 B 471K 50V

7700002500 MICROPHONE

KUC3523-040245 <KN>

S1 S2 S3 S4

2260002340 2260002340
SWITCH SWITCH SWITCH SWITCH
SKHHLP014A SKHHAM024A SKHHAM024A SKHHAM024A

0910053701 PCB

B-5587A

6330001670 RELAY

FTR-P3CP012W1

J4 J5 J6 J7

6510022470 6510015540
S.CONNECTOR S.CONNECTOR S.CONNECTOR S.CONNECTOR
B4B-PH-SM3-TB B8B-ZR-SM3-TF 40FLT-SM1-TB B4B-ZR-SM3-TF
5920000570 TRANSFORMER 12T01

W1 W6 W8

7120000470 JUMPER 7030003860 S.JUMPER 7030003860 S.JUMPER
ERDS2T0 ERJ3GE JPW V ERJ3GE JPW V

0910054092 PCB

B 5678B

[FRONT UNIT]

MC1 MC1
0800006230 MICROPHONE 0800006240 MICROPHONE
HM-132B ACC <KN> HM-132W ACC <KN> [BLACK] [WHITE]

2510001110 SPEAKER

045P1601 <KS>

W1 W2 W3

7120000470 JUMPER 7120000470 JUMPER 8900010500 CABLE

ERDS2T0 ERDS2T0 OPC-1046

SECTION 7

7-1 IC-M401EURO

[CHASSIS PARTS]
REF. NO. ORDER NO. J1 W1 W2 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP9 MP10 MP11 MP12 MP13 MP14 MP15 MP16 MP17 MP18 MP20 MP21 MP22 MP23 MP24 MP25 MP26 MP27 MP28
DESCRIPTION QTY. REF. NO. ORDER NO. DS1 EP2 MP1 MP2 MP3 DESCRIPTION QTY. LCD TTRLCD contact SRCN-2438-SP-N-W Reflector LCD holder White sheet
6510004880 Connector MR-DSE-Cable OPC-Cable OPC-2438 Chassis-IC clip 2438 Case 2438 Case (A) 2438 R-PACKING 2040 F-PACKING 1542 ANT SEAL 2438 B-Bush plate 2438 MB nut-MODULE cover 2438 SHEET O ring (AJ) O ring (AD) Screw PH M3x8 NI Screw PH B0 M3x8 NI-ZU (BT) Screw PH B0 M3x8 NI-ZU (BT) Screw BiH M3x6 SUS 2438 Screw 2438 cap Insulating plate 59TNearth plate 2490 B-Shield cover 2490 A-Shield cover Shield sponge (H) Screw PH B0 M3x6 NI-ZU (BT) Cable tie-80

[BLACK] [WHITE]

REF. NO. ORDER NO. R1 DESCRIPTION QTY. TP96N97N 15F-10KA-1301 (incl. nut)
REF. NO. ORDER NO. R1 DESCRIPTION QTY. TP96N97 15F-10KB-1301 (incl. nut)
REF. NO. ORDER NO. IC3 MP1 MP2 MP3 MP4 MP5 MPSC-Shield case 2438 Module plate VCO shield plate (A) Shield sponge (D) Thermally sheet (Z) 2490 shield plate DESCRIPTION QTY. 1
REF. NO. ORDER NO. MC1 DESCRIPTION [BLACK] [WHITE] QTY. [BLACK] [WHITE] Microphone HM-132B ACC 0800006240 Microphone HM-132W ACC 2510001111 Speaker 045P1601A

[ACCESSORIES]

REF. NO. ORDER NO. W1 W2 DESCRIPTION [BLACK] [WHITE] QTY. 8900009040 Cable OPC-Cable OPC-Cable OPC-2289 MIC hanger 2040 Mobile bracket 2040 Mobile bracket (A) 2040 Knob bolt-Knob bolt (A)-1 Screw PH A0 3x16 SUS Screw PH A0 5x20 SUS Flat washer M5 SUS Spring washer M5 SUS
SP1 W3 MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP10 MP12 MP13 MP14 MP15
8900010500 Cable OPC-2438 Front panel (B) 2438 Front panel (C) 2438 Key board (A) 2438 Window plate Knob N-286 Knob N-286 (A) SP net Screw PH B0 M3x8 NI-ZU (BT) Sonicrock SL-M3-5.E-cover 2490 E-cover (A) O ring (AC) 2438 C-Bush plate Knob spring NO.7800P 2490 earth spring
MP1 MP2 MP3 MP4 MP5 MP6 MP7
[BLACK] [WHITE] [BLACK] [WHITE]

Screw abbreviations

A0, B0, BT: Self-tapping PH: Pan head NI: Nickel SUS: Stainless NI-ZU: Nickel-Zinc BiH: Bind head

MP5 MP6 W1 W2 MP7

MP27 (C) MP23 (C) MP24 (C) MP17 (C) MP28 (C) MP13 (C) MP18 (C) MP11 (C) MP18 (C) MP18 (C) MP4 (C) MP18 (C) MP18 (C) MP13 (C) MP6 (F) MP18 (C) W3 (F) MP20 (C) W1 (C) MP8 (C) MP14 (C) W2 (C) MP7 (C) MP5 (C) J1 (C)

DTA144 EU (Symbol: 16)

DTC114 EU (Symbol: 24)

DTC114 TU (Symbol: 04)

DTC144 EU (Symbol: 26)

FMW1 (Symbol: W1)

SECTION 9

9-1 VR-A BOARD

BOARD LAYOUTS

to Main unit J5

GND GND VOL2 VOL1 HVS

9-3 HM-132

TOP VIEW

9-2 VR-B BOARD

GND SQLV 5V

BOTTOM VIEW

B-5585B

B-5586B

R2 R1 C1

9-4 LOGIC BOARD

From HM-132

GND GND GND KEYM HANG

Q1 IC1

SP+ SP BEEPM VCC 5V RCV SEND GND GND ATIS PTTM RMUTM GND PDATA PCK
SP+ SP BPLVL VCC 5V GND GND TMUT TXDET HI/LO SQLV PTT BPFV SQL UNLK PSTB
GND GND GND ICF3 DATAS DATAS+ DATAM DATAM+ 8 1

C25 R77

to DSC terminal DS-100

D5 C9 D1 R34 D6

C26 R6 R36 R3

C23 C32 C22 R71 C31 R26

R87 R86
R69 R68 R67 R66 R65 R64 R63 R62 R72 R53 R54 R52 R85 Q11
R70 R73 R61 R60 R59 R58 R57 R56 R55 R51 R50

to Main unit J6

C18 R47 R46 C28 R81 R80 R84

R7 C24

C12 R21 R22 R19 R78 C14 R20 R18 R17
R13 R44 R45 C21 R11 D4 R83 C6 R16 R14

R74 D3 R39 D2

Q6 IC4

R89 R1 R2 R79

B5679A

to Front unit SP1

9-5 MAIN UNIT

C183 C184

GND GND GND VCC DSC DSC+

C239 C240

C182 C279 R151

J7 C181

to VR-A, VR-B boards W1

VR-A/B

GND GND HVS VOL1 VOL2 GND GND 5V SQLV GND

C124 C125

C156 J5 C171

R143 R141 C126 C127

C136 C176 R144
C190 R99 R97 C139 R100 C138 R101 C195 C140 R96 R98 C137

C79 C78

L30 Q11

L31 L10

to Logic unit J4

C194 C298 R93 C192

C296 R62

C297 C72 R59 R60 C295

C73 R58
C191 C135 C128 R82 R81 R169 R91 R87
C268 C68 C267 C70 R57 R56 L29 R54
SP+ SP+ SP BEEPM SP BPLVL VCC VCC 5V 5V RCV SEND GND GND GND GND TMUT ATIS TXDET HI/LO SQLV PTT PTTM BPFV RMUTM SQL GND PDATA UNLK PCK PSTB 39

R146 C178 R148 C180

R192 C294

C277 C120 R80 C121

C177 R145

C179 R147

C71 C246
R135 C34 R165 C35 C39 C33 C38 R137 R136 C45 R39

C47 R38 R37

C84 Q14

R67 C91 R26

B-5678B

to HM-132

PTT MICG MIC GND GND GND
C40 R25 R28 C37 C260 C32 R27

R68 R69

C90 C95

Q14: DTC144EU

IC9: LA4425A

X1: CR-691 9.8304MHz

PWR AMP

VCC VCO D1, D2: MA77 D3, D4: HVD350B Q4: DTC144EU Q5, Q6: 2SC4226 R25 LOOP FIL

Q7: 2SC4215 O SEND

Q24: 2SA1588 GR Q25: DTC144EU T5 CTRL IC8: TA7805F +5 REG RL1: FTR-P3CP012W1 D18: 1SS355 PWR LIRL HVS T5
BUFF IC7C: NJM2902M IC10A: NJM4558M MIX R5 ATIS RCV
IC2: HN58X2432TI DS1: TTR5341 EEPROM

R5 IC10B: NJM4558M

Q22: 2SA1588 GR Q23: DTC144EU RS CTRL EMI FIL F14: NFM60R20T152 F15: NFM60R20T152
D11: DSA3A1 REVERSE CONECT PROTECT HV

MPU IC1: HD6473847RH

LPF PTT
Q11: 2SKQ2: 2SC4116 BL Q3: 2SB1132 R Q4: 2SC4116 BL DIM CTRL LCD CONT D/A

Q8: 2SKBUFF ATIS

RMUTM IC12A: 2SB1202 S AF MUTE IC12B: TC4W66FU AF MUTE IC11A: NJM4558M MIC AMP 5V

EXTERNAL GPS

Q6: DTC114EU Q9: DTC114EU D2: 1SS355
DATAS CI-V I/F BUFF IC4: TC47HC14AF DATAM
TMUT HI/LO TXDET HPF Q21: 2SC4116 BL Q18: DTC144EU Q12: 1SS355 GATE CTRL
PHOTO COUPLE ICF3 IC7: PC357N6T
PTTM SQL BPFV BEEPM BPLVL Q5: 2SC4081 R Q7: 2SA1576 R RIIFF MIC PTT
COMMON LINE RX LINE TX LINE LINE DATA BUS LINE

Q29: 2SC4116 BL

OPTION DSC terminal DS-100

DSC+ DSC VCC

DSC+ DSC BUFF HPF DSC

10 - 1

SECTION 11

11-1 LOGIC BOARD

TAG DS1 TTR5341 S27 S28 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 C0 C1 C2 C3 S1 S2 S3 S4 S5 S6 S7 S10 S11 S8 S9 S32 SEG26 SEG27 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 COM0 COM1 COM2 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG9 SEG10 SEG7 SEG8 SEG11 DIM3 Rk Rk DS7 FY1101 F-TR DIM2 Rk Rk DS8 FY1101 F-TR DIM1 RRk Rk Rk R14 1k R13 3.3 k C20 0.01 C21 0.001 C32 0.001 Rk
Q3 2SB1132 R Q2 2SC4116 BL Q4 2SC4116 BL
SCN RRRBAND EXTENTION S1 Rk UP VCC Rk S2 Rk S3 5V Rk S4 DN CH16 Rk S5 CH
TAG SCN UP DN CH16 CH H/L S6 S7

DS3 SML-311 YT

DS4 SML-311 YT

R6 820

DS5 SML-311 YT 9.87 V: BRIGHT 6.14 V: MIDDLE 4.12 V: DARK 0.00 V: LAMP OFF

DS6 SML-311 YT

R5 820

VCC NMEAO NMEAI PTT KEYM

SP SP+ C2 0.001 C1 0.001 J4 SP+ SP+ SP SP BEEPM BPLVL VSS VSS 5V 5V RCV SEND TMUT TXDET ATIS HI/LO SQLV PTT BPFV PTTM RMUTM SQL UNLK PDATA PSTB PCK C5 0.001 CP CP C3 0.TMUT KEYM 51 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG8 SEG7 SEG10 SEG9 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 TXDET ATIS HI/LO SQLV PTT BPFV PTTM RMUTM SQL UNLK PDATA PSTB PCK 5V 1

to Internal Speaker

HANG BEEPM
VCC BE NMEAO NMEAI /TMUT UNLK DN UP SCN TAG PTT KEYM TXDET LBAT SQL SQLV Rk SEG27 SEG26 SEG25 TMUT Rk