Icom IC-M501EURO User Manual

INSTRUCTION MANUAL

VHF MARINE TRANSCEIVER

iM501EURO

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

Or, transmit your distress call using digital selective calling on
channel 70 (the optional DS-100 must be installed).

USING DIGITAL SELECTIVE CALLING (ch 70)

(DS-100 DSC CONTROLLER is required)

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

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.

the rescue.

Versions of the IC-M501EURO 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. ò 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.

i

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

TABLE OF CONTENTS

1 OPERATING RULES .......................... 1

2 PANEL DESCRIPTION .................. 2 – 5

■ Panel description ............................. 2

■ Function display ............................... 4

■ Microphone ...................................... 5

3 BASIC OPERATION .................... 6 – 10

■ Channel selection ............................ 6

■ Receiving and transmitting .............. 8

■ Call channel programming ............... 9

■ Channel names ................................ 9

■

Optional voice scrambler operation

4 DUALWATCH/TRI-WATCH ............... 11

■ Description ..................................... 11

.. 10

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.

■ Operation ....................................... 11

5 SCAN OPERATIONS ................. 12 – 13

■ Scan types ..................................... 12

■ Setting tag channels ...................... 13

■ Starting a scan ............................... 13

6 SET MODE ................................. 14– 16

■ Set mode programming ................. 14

■ Set mode items .............................. 15

7 CONNECTIONS AND

MAINTENANCE ......................... 17 – 22

■ Unpacking ...................................... 17

■ Antenna ......................................... 17

■ Fuse replacement .......................... 17

(actual recommendation limits are specified
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 1–2 minutes etc.

Similarly some types of transmitter, SSB,
CW, AM, etc. have a lower ‘average’ output
power and the perceived risk is even lower.

■ Cleaning ......................................... 17

■ Connections ................................... 18

■ Mounting the transceiver ............... 19

■ Optional unit installation ................. 21

■ Dimensions ..................................... 20

8 TROUBLESHOOTING ...................... 23

9 CHANNEL LIST ................................ 24

10 SPECIFICATIONS AND OPTIONS ... 25

■ Specifications ................................. 25

■ Options .......................................... 25

MB-75 TEMPLATE

ii

IMPORTANT

READ ALL INSTRUCTIONS carefully and completely

before using the transceiver.

CAUTIONS

RWARNING! NEVER connect the transceiver to an AC

outlet. This may pose a fire hazard or result in an electric
shock.

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

vehicle may be hindered or where it could cause bodily injury.

KEEP the transceiver at least 3.3 ft (1 m) away from the

ship’s navigation compass.

SAVE THIS INSTRUCTION MANUAL — This in-

struction manual contains important operating instructions for
the IC-M501EURO.

DO NOT use or place the transceiver in areas with temper-

atures below –4°F (–20°C) or above +140°F (+60°C) or, in
areas subject to direct sunlight, such as the dashboard.

AVOID the use of chemical agents such as benzine or al-

cohol 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 water including fresh water, clean the trans­ceiver thoroughly with fresh water to avoid corrosion.

iii

OPERATING RULES

1

◊ 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.

◊ 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
craft’s identification for radio purposes.

(2) OPERATOR’S 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.

1

2

CALLDUAL

SCAN

WATER RESISTANT

TAG

DIAL

DIMMER

HI/LO

POWER

VOL

iM501EURO

VHF MARINE

SQL

16

Speaker

Function
display

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PANEL DESCRIPTION

■ Panel description

q POWER SWITCH [POWER]

Push to toggle the transceiver power ON and OFF.

w VOLUME CONTROL [VOL]

Adjusts the audio level. (p. 8)

r TRANSMIT POWER SWITCH [HI/LO]

➥ Toggles high and low power when pushed. (p. 8)

• Some channels are set to low power only.

➥ While pushing this switch, other switches perform sec-

ondary functions.

e SQUELCH CONTROL [SQL]

Sets the squelch threshold level. (p. 8)

2

PANEL DESCRIPTION

2

t CHANNEL SELECTOR [CHANNEL]

Rotate [CHANNEL] to select the operating channels, set
mode contents, etc. (p. 8)

y DIMMER SWITCH [DIMMER]

Push to select one of 8 backlighting (LCD and switches)
levels.

u CALL CHANNEL SWITCH [CALL]

➥ Push to select the call channel. (p. 6)
➥ Push for 3 sec. to enter call channel programming con-

dition. (p. 9)

➥ While pushing [HI/LO], enters memory name program-

ming condition. (p. 9)

i CHANNEL 16 SWITCH [16]

➥ Selects channel 16 when pushed. (p. 6)
➥ Enters initial set mode when pushed while turning power

ON. (p. 14)

o DIAL SWITCH [DIAL]

➥ Exits from channel 16 or call channel when pushed. (p.

6)

➥ While pushing [HI/LO], selects channel group when

pushed. (pgs. 6, 7)

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

!0 SCAN SWITCH [SCAN/TAG] (p. 13)

➥ Starts and stops normal or priority scan when tag chan-

nels are programmed.

➥ Push [SCAN/TAG] for 1 sec. to set the displayed chan-

nel as a tag (scanned) channel.

➥ While pushing [HI/LO], push for 3 sec. to clear all tag

channels.

!1 DUALWATCH/TRI-WATCH SWITCH [DUAL] (p. 11)

➥ Starts dualwatch or tri-watch when pushed.
➥ Stops dualwatch/tri-watch when either is activated.

3

INT

CALL

BUSY
25W
TAG SC DUP
CALLING

w

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PANEL DESCRIPTION

2

■ Function display

q BUSY/TRANSMIT INDICATOR (p. 8)

➥ “BUSY” appears when receiving a signal or when the

squelch opens.

➥ “TX” appears while transmitting.

w POWER INDICATOR (p. 8)

➥ “25W” appears when high power is selected.
➥ “1W” appears when low power is selected.

e TAG CHANNEL INDICATOR (p. 13)

Appears when a tag channel is selected.

r CHANNEL NAME INDICATOR

➥ Channel comment appears if programmed. (p. 9)
➥ “Low Battery” appears when the battery voltage drops

to approx. 10 V DC or below.

➥ “DUAL” appears during dualwatch; “TRI” appears dur-

ing tri-watch. (p. 11)

t SCRAMBLER INDICATOR (p. 11)

Appears when the optional voice scrambler is activated.

y DUPLEX INDICATOR

Appears when a duplex channel is selected.

u CHANNEL NUMBER READOUT

➥ Indicates the selected operating channel number. “A”

appears when a simplex channel is selected. (p. 6)

➥ In set mode, indicates the selected condition. (p. 14)

i CHANNEL GROUP INDICATOR (p. 6)

Indicates whether an International, U.S.A., Holland, DSC
or ATIS channel is selected.

• Available channel groups depend on version.

o CALL CHANNEL INDICATOR (pgs. 6, 9)

Appears when a call channel is selected.

4

■ Microphone

Speaker

Microphone

w

q

e

q PTT SWITCH [PTT]

Push and hold to transmit; release to receive. (p. 8)

PANEL DESCRIPTION

2

w CHANNEL UP/DOWN SWITCHES [YY]/[ZZ]

Push either switch to change the operating memory chan­nel, set mode contents, etc. (p. 8)

e TRANSMIT POWER SWITCH [HI/LO]

➥ Same as the [HI/LO] switch on the front panel.
➥ Toggles the [Y]/[Z] and [HI/LO] switch functions ON and

OFF when pushed at power ON.

5

3

INT

25W

DUPTAG

INTL

Push

CALL

INT
25W CALL
TAG
CALLING

INT
25W
TAG
CALLING

Push

16

BASIC OPERATION

■ 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] to select channel 16.
➥ Push [DIAL] to return to the condition before selecting

channel 16, or rotate [CHANNEL] to select operating chan­nel.

◊ 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 [CALL] 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)

➥ Push [DIAL] to return to the condition before selecting call

channel

, or rotate [CHANNEL] to select operating channel.

◊ International channels

There are 55 International channels for the IC-M501EURO.

q Push [DIAL] to select a regular channel.
w Push [DIAL] while pushing [HI/LO] to change the channel

group, if necessary.

•“INT” appears when International channels are selected.

e Rotate the channel selector to select a channel.

•“DUP” appears for duplex channels.

6

◊ U.S.A. channels (U.K. version only)

ATIS

25W

DUPTAG

INTL

HOLLAND

1W

DUP

INTL

USA
25W
TAG
CCG

For the U.K. versions, there are 61 U.S.A. channels in addi­tion to 56 International channels.

q Push [DIAL] to select a regular channel.
w To change the channel group, push [DIAL] while pushing

[HI/LO].

• International and U.S.A. channels can be selected in sequence.

e Rotate the channel selector to select a channel.

• Channels are memorized separately for each channel group.

◊ Holland channels (Holland version only)

For the holland versions, there are 57 Holland channels in ad­dition to 56 International channels.

q Push [DIAL] to select a regular channel.
w To change the channel group, push [DIAL] while pushing

[HI/LO].

•International and Holland channels can be selected in sequence.

e Rotate the channel selector to select a channel.

• Channels are memorized separately for each channel group.

BASIC OPERATION

3

◊ ATIS and DSC channels (FRG version only)

For the FRG versions, there are 55 ATIS and 52 DSC chan­nels in addition to 57 International channels.

q Push [DIAL] to select a regular channel.
w To change the channel group, push [DIAL] while pushing

[HI/LO].

•International, ATIS and DSC channels can be selected in se­quence.

e Rotate the channel selector to select a channel.

• Channels are memorized separately for each channel group.

7

16

CALLDUAL

SCAN

WATER RESISTANT

TAG

DIAL

DIMMER

HI/LO

POWER

VOL

iM501EURO

VHF MARINE

SQL

q

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BASIC OPERATION

3

■ Receiving and transmitting

CAUTION: Transmitting without an antenna may dam-

age the transceiver.

q Push [POWER] to turn power ON.
w Set the audio and squelch levels.

➥ Rotate [SQL] fully counterclockwise in advance.
➥ Rotate [VOL] to adjust the audio output level.
➥ Rotate [SQL] clockwise until the noise disappears.

e To change the channel group, push [DIAL] while pushing

[HI/LO]. (p. 6)

• The European version has International channels only.

r Rotate the channel selector or push [Y]/[Z] on the micro-

phone to select the desired channel.

•When receiving a signal, “BUSY” appears and audio is emitted
from the speaker.

•Further adjustment of [VOL] may be necessary at this point.

•Use the optional voice scrambler function for privacy. (p. 10)

t Push [HI/LO] to select the output power if necessary.

•“25W” or “1W” appears when high or low power is selected, re-

•Choose low power to conserve power, choose high power for

• Some channels are for low power only.

spectively.

longer distance communications.

y Push and hold [PTT] to transmit, then speak into the mi-

crophone.

•“TX” appears.

• Channel 70 cannot be used for transmission (for GMDSS use).

u Release [PTT] to receive.

IMPORTANT: To maximize the readability of your trans­mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 10 to 15 cm (4 to 6 inches) from your
mouth and speak at a normal voice level.

8

BASIC OPERATION

INT
25W
TAG
äLEASURE

INT

25W CALL

DUPTAG

INTL

INT
25W CALL
TAG
CALLING

3

■ Call channel programming

The call channel switch can be programmed to your most
often-used channels in each channel group for quick recall.

q While pushing [HI/LO], push [DIAL] one or more times to

select the desired channel group (International, U.S.A.,
Holland, ATIS, DSC) to be programmed.

w Push [CALL] for 3 sec. to enter the call channel program-

ming condition.

• Channel number starts flashing.

e Rotate the channel selector to select the desired channel.

r Push [CALL] to program the displayed channel as the call

channel.

• Push [DIAL] to cancel.

•The channel number stops flashing.

■ Channel names

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 [HI/LO], push [CALL] to edit memory chan-

nel name.

• A cursor appears and blinks.

e Select the desired character by rotating the channel selec-

tor or by pushing [Y]/[Z] on the microphone.

• Push [SCAN] or [DIAL] for cursor movement.

r Push [CALL] to input and set the name.

•The cursor disappears.

t Repeat steps q to r to program another memory channel

names, if desired.

9

BASIC OPERATION

Setmode

Beep

Setmode

Scrambler
code

Setmode

Scrambler
code

Enter set mode

16

POWER

+

Select code

16

Push one or
more times.

Set mode Scrambler code item

3

■ Optional voice scrambler operation

10

◊ Activating the scrambler

The optional voice scrambler provides private communica­tions. In order to receive or send scrambled transmissions
you must first activate the scrambler function. To activate the
function, an optional UT-98 or UT-112 is necessary. See p. 16
for selecting the unit. Ask your dealer for details.

q Select an operating channel except channel 16 and 70.
w While pushing [HI/LO], push [DIMMER] to toggle an op-

tional scrambler function ON or OFF.

•“SC” appears.

e To turn the scrambler function OFF, repeat step w.

•“SC” disappears.

[Example]: Programming scrambler code 127.

◊ Programming scrambler codes

There are 128 or 32 codes (0 to 127 or 1 to 32) available for
programming. In order to understand one another, all trans­ceivers in your group must have the same scramble code.

This function may not be available depending on dealer set­ting.

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] one or more times to select the scrambler code

item.

•“Scrambler code” appears.

t Rotate the channel selector to select the desired scram-

bler code.

y Turn power OFF, then ON again to exit set mode.

Dualwatch Tri-watch

Call channel

DUAL WATCH/TRI-WATCH

4

■ 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, tri­watch becomes dualwatch until the signal disappears.

•To transmit on the selected channel during dualwatch/tri-watch,
push and hold [PTT].

■ Operation

q Select the desired operating channel.
w Select dualwatch or tri-watch in set mode. (p. 15)
e Push [DUAL] to start dualwatch or tri-watch.

•

“DUAL” appears during dualwatch; “TRI” appears during tri-watch.

• Beep tone sounds when a signal is received on channel 16.

•Tri-watch becomes dualwatch when receiving a signal on the call

channel.

r To cancel dualwatch/tri-watch, push [DUAL] again.

[Example]: Operating tri-watch on INT channel 25.

25W
TAG
TRI

BUSY INT
25W CALL
TAG
CALLING

BUSY INT
25W
TAG
CALLING

25W
TAG
TRI

INT

DUP
16

16

DUP
16

INT

DUP
16

Tri-watch starts.

Signal is received
on call channel.

Signal received on
channel 16 takes
priority.

Tri-watch resumes
after the signal
disappears.

11

5

SCAN OPERATIONS

■ Scan types

Scanning is an efficient way to locate signals quickly over a
wide frequency range. The transceiver has priority scan and
normal scan.

PRIORITY SCAN

CH 01

CH 06

CH 05 CH 04

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.

CH 16

CH 02

CH 03

Set the tag channels (scanned channel) before scanning.
Clear the tag channels which inconveniently stop scanning,
such as digital communication use.

Choose priority or normal scan in set mode. (p. 15)

NORMAL SCAN

CH 01 CH 02

CH 06

CH 05 CH 04

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.

CH 03

12

SCAN OPERATION

INT

25W

DUPTAG

INTL

INT

25W

DUPTAG

Normalscan

BUSY INT
25W

DUPTAG

Normalscan

SCAN

TAG

Push

Scan starts. When a signal is received

5

■ 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 (Inter­national, U.S.A., Holland, DSC, ATIS) independently.

q While pushing [HI/LO], push [DIAL] one or more times to

select the desired channel group, if desired.

w Select the desired channel to set as a tag channel.
e Push [SCAN/TAG] for 1 sec. to set the displayed channel

as a tag channel.

•“TA G” appears in the function display.

r To cancel the tag channel setting, repeat e.

•“TA G” disappears.

• Clearing all tag channels in the selected channel group

➥ While pushing [HI/LO], push [DIAL] for 3 sec. to clear all

tag channels in the channel group.

[Example]: Starting a normal scan.

■ 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 [HI/LO], push [DIAL] one or more times to

select the desired channel group, if desired.

e Push [SCAN] to start priority or normal scan.

•“Pri scan 16” or “Normal scan” appears in the function display.

•When a signal is detected, scan pauses until the signal disap-

pears or resumes after pausing 5 sec. according to set mode set­ting. (Channel 16 is still monitored during priority scan.)

•Rotate the channel selector to check the scanning tag channels,
to change the scanning direction or resume the scan manually.

•“16” flashes and a beep tone sounds when a signal is received
on channel 16 during priority scan.

r To stop the scan, push [SCAN].

•“Pri scan” or “Normal scan” disappears.

13

6

SET MODE

■ Set mode programming

Set mode is used to change the conditions of the trans­ceiver’s functions: beep tone function, scan mode (normal/pri­ority), scan resume timer, dual/tri watch, LCD contrast, scram­ble code, scrambler unit, internal speaker and ATIS code.

Available functions may differ depending on versions.

• SET MODE CONSTRUCTION

Beep tone

Beep

ATIS check

ATIS check

Scrambler unit

Scrambler

Scan mode

Scan mode

Push

Scrambler code

Scrambler
code

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 Rotate the channel selector to select the desired condition

of the item.

y Turn power OFF, then ON again to exit set mode.

Scan resume timer

Scan timer

16

Internal speaker

Internal
speaker

Dual/tri watch

DUAL/TRI

LCD contrast

LCD
contrast

14

SET MODE

Setmode

DUAL/TRI

Dual watch (default) Tri-watch

Setmode

Scantimer

Scan timer ON (default) Scan timer OFF

Setmode

Scanmode

Priority scan (default) Normal scan

Setmode

Beep

Beep tone ON (default) Beep tone OFF

6

■ Set mode items

◊ Beep tone

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.

◊ Scan mode

The transceiver has 2 scan modes: normal scan and priority
scan. Normal scan searches all tag channels in the selected
channel group. Priority scan searches all tag channels in se­quence while monitoring channel 16.

◊ 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.

◊ Dual/tri watch

This item sets the [DUAL] switch function as dual watch or tri­watch.

See the section ‘Dual watch/Tri-watch’ for details.

15

SET MODE

Setmode
ATIScheck
0123456789

ATIS code

Setmode

Scrambler

UT-98 scrambler unit UT-112 scrambler unit

Setmode

Scrambler
code

Scrambler code 0 (UT-98 default) Scrambler code 127

Setmode

Internal
speaker

Internal speaker ON (default) Internal speaker OFF

Setmode

LCD
contrast

LCD contrast 4 (default)

6

◊ LCD contrast

This item adjusts the contrast of the LCD in 8 steps.

◊ Internal speaker

When an optional external speaker is connected, the speak­ers on the transceiver and microphone can be muted.

◊ Scrambler code

When an optional scrambler unit is connected, the scrambler
code can be set depending on dealer setting.
When the UT-98 or UT-112 is installed, 128 or 32 codes (0 to
127 or 1 to 32) can be selected, respectively.

16

◊ Scrambler unit

When an optional scrambler unit is connected, the scrambler
unit can be selected in set mode depending on dealer setting.

◊ ATIS check

The ATIS ID code can be checked in set mode.

CONNECTIONS AND MAINTENANCE

Fuse rating: 10 A

qw

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7

■ Unpacking

The following accessories are supplied: Qty.

q Mounting bracket ............................................................ 1

w Microphone hanger (OPC-562) ...................................... 1

e Mic hanger screws (3.5 × 30) ......................................... 2

r Mounting screws (5 × 20) ............................................... 2

t Flat washers (M5) ........................................................... 2

y Spring washers (M5) ...................................................... 2

u Mounting bracket knobs ................................................. 2

i DC power cable (OPC-947) ........................................... 1

■ 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.

■ 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.

■ 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.

17

CONNECTIONS AND MAINTENANCE

q

w

e

r

7

■ Connections

q DC POWER CONNECTOR

Connects the supplied DC power cable from this connector
to an external 12 V DC power source.

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

e ANTENNA CONNECTOR

Connects a marine VHF antenna with a PL-259 connector
to the transceiver.

DSC CONTROLLER.

CAUTION: Transmitting without an antenna may dam-

age the transceiver.

r EXTERNAL SPEAKER JACK

Connects to an external speaker. See ‘Options’ on p. 25
for available external speakers.

MICROPHONE HANGER

Rest the supplied microphone on the hanger when not in
use.

18

CONNECTIONS AND MAINTENANCE

7

■ 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
(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.

CAUTION: KEEP the transceiver and microphone at

least 1 meter away from your vessel’s magnetic navigation
compass.

NOTE: Check the installation angle; the function display
may not be easy-to-read at some angles.

• OVERHEAD MOUNTING

• MOUNTING ON DASHBOARD

19

CONNECTIONS AND MAINTENANCE

7

◊ Using the optional mounting bracket

An optional MB-75 FLUSH MOUNT is available for mounting
the transceiver to a flat surface such as an instrument panel.

CAUTION: KEEP the transceiver and microphone at

least 1 meter away from your vessel’s magnetic navigation
compass.

q Using the template on the last page, carefully cut a hole

into the instrument panel (or wherever you plan to mount
the controller).

w Slide the transceiver through the hole as shown below.

e Attach the 2 supplied bolts (M5 × 8 mm) on either side of

the IC-M501EURO.

r Attach the clamps on either side of the transceiver.

• Make sure that the clamps align parallel to the transceiver body.

t Tighten the end bolts on the clamps (rotate clockwise) so

that the clamps press firmly against the inside of the in­strument control panel.

y Tighten the locking nuts (rotate counterclockwise) so that

the transceiver is securely mounted in position as below.

u Connect the antenna and control cable, then return the in-

strument control panel to its original place.

20

■ Optional unit installation

Optional unit

CONNECTIONS AND MAINTENANCE

7

CAUTION: DISCONNECT the DC power cable from the

transceiver before performing any work on the transceiver.
Otherwise, there is danger of electric shock and/or equip­ment damage.

◊ Opening the transceiver case

Follow the case opening procedure shown here when you
want to install an optional unit, etc.

q Remove the 6 screws as shown below and open the trans-

ceiver.

w Remove the 4 screws from the shielding plate, then lift up

the shielding plate.

e Plug an optional unit to J6 on the MAIN unit as shown

below.

r Return the shielding plate and assemble the units to their

original positions.

21

CONNECTIONS AND MAINTENANCE

145.0 (5 23⁄32˝)

165.0 (6

1

⁄2˝)

31.4

(1

1

⁄4˝)

53.0

(2 3⁄32˝)

Unit: mm (inch)

110.0 (4

11

⁄32˝) 109.4 (4

5

⁄16˝)

7

■ Dimensions

22

TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION REF.

No power comes ON.

•Bad connection to the power supply. •Check the connection to the transceiver. p. 18

8

No sound comes from
the speaker.

Transmitting is impossi­ble, or high power can­not be selected.

Scan does not start. •“TA G ” channel is not programmed. •Set the desired channels as “TAG ” chan-

No beep sounds. • Beep tone is turned OFF. • Turn the beep tone ON in SET mode. p. 15

Receive signal cannot
be understood.

•Squelch level is too deep.

•Volume level is too low.

•Speaker has been exposed to water.

•Some channels are for low power or re-

ceive only.

•The output power is set to low.

•Optional voice scrambler is turned OFF.

•Scramble code is not set correctly.

•Set squelch to the threshold point.

•Set [VOL] to a suitable level.

•Drain water from the speaker.

•Change channels.

•Push [HI/LO] to select high power.

nels.

•Turn the optional voice scrambler ON.

•Reset the scramble code.

p. 8
p. 8

—

pgs.
6, 24
p. 8

p. 13

p. 10
p. 16

23

9

CHANNEL LIST

• International channels

Frequency (MHz)

CH

Transmit

156.050 160.650

01

156.100 160.700

02

156.150 160.750

03

156.200 160.800

04

156.250 160.850

05

156.300 156.300

06

156.350 160.950

07

156.400 156.400

08

156.450 156.450

09

156.500 156.500

10

Receive

Frequency (MHz)

CH

Transmit

156.550 156.550

11

156.600 156.600

12

156.650 156.650

13

156.700 156.700

14

†

156.750 156.750

15

156.800 156.800

16

†

156.850 156.850

17

156.900 161.500

18

156.950 161.550

19

157.000 161.600

20

Receive

Frequency (MHz)

CH

Transmit

157.050 161.650

21

157.100 161.700

22

157.150 161.750

23

157.200 161.800

24

157.250 161.850

25

157.300 161.900

26

157.350 161.950

27

157.400 162.000

28

156.025 160.625

60

156.075 160.675

61

Receive

Frequency (MHz)

CH

Transmit

156.125 160.725

62

156.175 160.775

63

156.225 160.825

64

156.275 160.875

65

156.325 160.925

66

156.375 156.375

67

156.425 156.425

68

156.475 156.475

69

‡

156.525 156.525

70

156.575 156.575

71

Receive

Frequency (MHz)

CH

Transmit

156.625 156.625

72

156.675 156.675

73

156.725 156.725

74

156.875 156.875

77

156.925 161.525

78

156.975 161.575

79

157.025 161.625

80

157.075 161.675

81

157.125 161.725

82

157.175 161.775

83

Receive

Frequency (MHz)

CH

Transmit

157.225 161.825

84

157.275 161.875

85

157.325 161.925

86

157.375 161.975

87

157.425 162.025

88

Receive

24

• U.S.A. channels

Frequency (MHz)

CH

Transmit

01A

156.100 156.100

02A

156.150 156.150

03A

156.200 156.200

04A

156.250 156.250

05A

156.300 156.300

06

156.350 156.350

07A

156.400 156.400

08

156.450 156.450

09

156.500 156.500

10 156.525

†

Low power only for U.K. version.

Receive

(for U.K. version only)

Frequency (MHz)

CH

Transmit

156.550 156.550156.050 156.050

11

156.600 156.600

12

†

156.650 156.650

13

156.700 156.700

14

‡

156.750 156.750

15

156.800 156.800

16

†

156.850 156.850

17

156.900 156.900

18A

156.950 156.950

19A

157.000 161.600

20

Receive

‡

Receive only.

Frequency (MHz)

CH

Transmit

157.000 157.000

20A

157.050 157.050

21A

157.100 157.100

22A

157.150 157.150

23A

157.200 161.800

24

157.250 161.850

25

157.300 161.900

26

157.350 161.950

27

157.400 162.000

28

156.025 156.025

60A

Receive

Frequency (MHz)

CH

Transmit

156.075 156.075

61A

156.125 156.125

62A

156.175 156.175

63A

156.225 156.225

64A

156.275 156.275

65A

156.325 156.325

66A

†

156.375

67

156.425

68

156.475

69

‡

156.525

70

Receive

156.375

156.425

156.475

Frequency (MHz)

CH

Transmit

156.575 156.575

71

156.625 156.625

72

156.675 156.675

73

156.725 156.725

74

156.875 156.875

77

156.925 156.925

78A

156.975 156.975

79A

157.025 157.025

80A

157.075 157.075

81A

157.125 157.125

82A

Receive

Frequency (MHz)

CH

Transmit

157.175 157.175

83A

157.225 161.825

84

157.275 161.875

85

157.325 161.925

86

157.325 157.325

86A

157.375 161.975

87

157.425 162.025

88

157.425 157.425

88A

Receive

SPECIFICATIONS AND OPTIONS

10

■ Specifications

• GENERAL

• Frequency coverage :

Transmit 156.025–157.425 MHz
Receive 156.025–162.025 MHz

• Mode : FM (16K0G3E)

• Channel spacing : 25 kHz

• Current drain (at 13.8 V) : TX high 6.0 A max.

Max. audio 1.2 A max.

• Power supply requirement : 13.8 V DC

• Frequency stability : ±10 ppm

(–20°C to +60°C; –4°F to +140°F)

•Dimensions : 165(W)×110(H) × 109.4(D) mm

(Projection not included)

• Weight : 1130 g

• TRANSMITTER

• Output power : 25 W and 1 W

• Modulation system : Variable reactance phase

modulation

• Max. frequency deviation : ±5.0 kHz

• Spurious emissions : Less than 0.25 µW

• RECEIVER

• Receive system :

• Sensitivity (12 dB SINAD) : Less than 0.32 µV (typical)

• Squelch sensitivity : Less than 0.32 µV

•

Intermodulation rejection ratio

•

Spurious response rejection ratio

• Adjacent channel selectivity : More than 70 dB

• Audio output power : 3.5 W at 10% distortion with a 4 Ω

Double conversion superheterodyne

: More than 68 dB
: More than 70 dB

load

■ Options

• DS-100 DSC CONTROLLER

When the DS-100 is installed, the transceiver conforms to
DSC class D for marine digital communications.

• MB-75 FLUSH MOUNT

For mounting the transceiver to a panel.

• SP-5 EXTERNAL SPEAKER

A large, external speaker for superior audio output.

• SP-10 EXTERNAL SPEAKER

A compact, external speaker. Features easy installation.

• UT-98 VOICE SCRAMBLER UNIT

• UT-112 VOICE SCRAMBLER UNIT

Ensures private communications. 128 or 32 codes are avail­able. Not available in some countries.

All stated specifications are subject to change without notice or
obligation.

25

Blank page

149 (57/8˝)

MB-75 TEMPLATE

4–R11

˝)

8

/

5

92 (3

Cut here

Unit: mm (inch)

Blank page

DECLARATION

OF CONFORMITY

We Icom Inc. Japan

1-1-32 Kamiminami, Hirano-ku,
Osaka 547-0003 Japan

Kind of equipment:

VHF MARINE TRANSCEIVER

This compliances is based on conformity with the following harmonised
standards, specifications or documents:
i)

EN301 025-2 v1.1.1 08/2000

ii) pr

EN300 162-2 v1.1.1 07/2000

iii) EN60945 1997
iv) EN60950 1992
v) ETS300 698 1997 Annex B
vi) pr

EN300 698-2 v1.1.1 03/2000

Type-designation: iC-m501euro

Signature

Authorized representative name

Place and date of issue

T. Aoki
General Manager

Icom (Europe) GmbH

Himmelgeister straße 100
D-40225 Düsseldorf

Düsseldorf 11th Oct. 2000

Icom (Europe) GmbH

Declare on our sole responsability that this equipment complies 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.

Version (where applicable):

0560

 GER
 AUT
 GBR
 IRL
 FRA

 NED
 BEL
 LUX
 ESP
 POR

 ITA
 GRE
 SWE
 DEN
 FIN

< Intended Country of Use >

Count on us!

A-5661H-1EU-e
Printed in Japan
© 2000 Icom Inc.

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan