INSTRUCTION MANUAL
VHF MARINE TRANSCEIVER
iM21
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FOREWORD
FEATURES
Thank you for purchasing this Icom product. The IC-M21 VHF
MARINE TRANSCEIVER is designed and built with Icom’s su-
perior technology and craftsmanship. With proper care this
product should provide you with years of trouble-free operation.
ꢀ Water resistant construction
Built tough to withstand the punishing marine environ-
ment, the IC-M21 meets JIS water resistant specification
grade 7 while using BP-223 or BP-224.
ꢀ Dual watch and tri-watch functions*
Convenient functions which allow you to monitor the dis-
tress channel (Ch 16) while receiving a channel of your
choice—dual watch; or monitor the distress channel and
another channel while receiving a channel of your
choice—tri-watch.
IMPORTANT
READ ALL INSTRUCTIONS carefully and com-
pletely before using the transceiver.
*This function may not be available depending on version.
SAVE THIS INSTRUCTION MANUAL—This in-
struction manual contains important operating instructions for
the IC-M21.
ꢀ Large, easy-to-read LCD
With dimensions of 24(H) × 35(W) mm, the IC-M21’s func-
tion display is easy to read and shows operating condi-
tions at a glance. Backlighting and contrast can be
adjusted to suit your preferences.
EXPLICIT DEFINITIONS
WORD
RWARNING
CAUTION
NOTE
DEFINITION
ꢀ Simple operation
Personal injury, fire hazard or electric shock
Ergonomic design with a minimum number of switches
and controls provides simple intuitive operation.
may occur.
Equipment damage may occur.
If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.
ii
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CAUTIONS
BE CAREFUL! The transceiver’s right-side panel will
RWARNING! NEVER connect the transceiver to an
AC outlet. This may pose a fire hazard or result in an electric
shock.
become hot when operating continuously for long periods.
BE CAREFUL! The IC-M21 employs water resistant
construction, which corresponds to JIS water resistant speci-
fication, grade 7 (1 m; 3 ft depth for 30 min.). However, once
the transceiver has been dropped, water resistant cannot be
guaranteed due to the fact that the transceiver may be
cracked, or the water resistant seal damaged, etc.
RWARNING! NEVER hold the transceiver so that the
antenna is very close to, or touching exposed parts of the
body, especially the face or eyes, while transmitting. The
transceiver will perform best if the microphone is 5 to 10 cm
(2 to 4 inches) away from the lips and the transceiver is verti-
cal.
MAKE SURE the flexible antenna and battery pack are
securely attached to the transceiver, and that the antenna and
battery pack are dry before attachment. Exposing the inside
of the transceiver to water will result in serious damage to the
transceiver.
NEVER connect the transceiver to a power source other
than the BP-223 or BP-224. Such a connection will ruin the
transceiver.
AVOID using or placing the transceiver in direct sunlight or
in areas with temperatures below –15°C or above +55°C.
Versions of the IC-M21 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 oper-
ates in non-harmonised frequency bands and/or may be sub-
ject to licensing conditions in the country of use. Be sure to
check that you have the correct version of this radio or the
correct programing of this radio, to comply with national li-
censing requirement.
KEEP the transceiver out of the reach of children.
KEEP the transceiver at least 0.9 meter (3.0 ft) away from
your vessel’s magnetic navigation compass.
Icom, Icom Inc. and
are registered trademarks of Icom Incorporated
(Japan) in the United States, United Kingdom, Germany, France, Spain, Russia
and/or other countries.
iii
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TABLE OF CONTENTS
IN CASE OF EMERGENCY ................................................ i
RECOMMENDATION ........................................................... i
FOREWORD ....................................................................... ii
IMPORTANT ........................................................................ ii
EXPLICIT DEFINITIONS ..................................................... ii
FEATURES .......................................................................... ii
CAUTIONS ......................................................................... iii
TABLE OF CONTENTS ...................................................... iv
5 SCAN OPERATION ................................................ 11–12
ꢁ Scan types ................................................................. 11
ꢁ Setting tag channels .................................................. 12
ꢁ Starting a scan .......................................................... 12
6 SET MODE ............................................................. 13–16
ꢁ SET mode programming ........................................... 13
ꢁ SET mode items ........................................................ 13
7 BATTERY CHARGING ........................................... 17–19
ꢁ Battery charging ........................................................ 17
ꢁ Battery cautions ......................................................... 17
ꢁ Installing batteries in the battery case ....................... 18
ꢁ Optional battery chargers .......................................... 19
1 OPERATING RULES ...................................................... 1
2 PANEL DESCRIPTION ............................................... 2–5
ꢁ Front, top and side panels............................................ 2
ꢁ Function display .......................................................... 4
8 SUPPLIED ACCESSORIES AND ATTACHMENTS 20–22
9 TROUBLESHOOTING .................................................. 23
10 CHANNEL LIST ........................................................... 24
3 BASIC OPERATION ................................................... 6–9
ꢁ Channel selection ........................................................ 6
ꢁ Lock function ............................................................... 7
ꢁ Adjusting the squelch level .......................................... 7
ꢁ Receiving and transmitting .......................................... 8
ꢁ Call channel programming .......................................... 9
ꢁ Automatic backlighting ................................................ 9
11 SPECIFICATIONS AND OPTIONS .............................25
ꢁ Specifications ........................................................... 25
ꢁ Options ..................................................................... 25
4 DUALWATCH/TRI-WATCH .......................................... 10
ꢁ Description ................................................................ 10
ꢁ Operation ................................................................... 10
DECLARATION OF CONFORMITY
iv
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OPERATING RULES
1
(2) OPERATOR’S LICENSE
DPriorities
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.
• 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.
The Restricted Radiotelephone Operator Permit must be
posted near the transceiver or be kept with the operator. Only
a licensed radio operator may operate a transceiver.
• You must monitor Channel 16 when you are not operating
on another channel.
• False or fraudulent distress calls are prohibited under law.
However, non-licensed individuals may talk over a transceiver
if a licensed operator starts, supervises, ends the call and
makes the necessary log entries.
DPrivacy
• Information overheard but not intended for you cannot law-
fully be used in any way.
A current copy of the applicable government rules and regu-
lations is only required to be on hand for vessels in which a
radio telephone is compulsory. However, even if you are not
required to have these on hand it is your responsibility to be
thoroughly acquainted with all pertinent rules and regulations.
• Indecent or profane language is prohibited.
DRadio licenses
(1) SHIP STATION LICENSE
When your craft is equipped with a VHF FM transceiver, you
must have a current radio station license before using the
transceiver. It is unlawful to operate a ship station which is not
licensed.
Inquire through your dealer or the appropriate government
agency for a Ship-Radiotelephone license. This license in-
cludes the call sign which is your craft’s identification for radio
purposes.
1
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PANEL DESCRIPTION
2
ꢁ Front, top and side panels
q DIAL/CHANNEL GROUP SWITCH [DIAL]
• Selects and changes the regular channels.
(p. 6)
• Selects one of 2 regular channels in se-
quence when pushed for 1 sec. (p. 6)
t TRANSMIT POWER/LOCK SWITCH
[H/L•LOCK]
• Selects high, middle or low power when
pushed. (p. 8)
• Toggles the lock function ON/OFF when
pushed for 1 sec. (p. 7)
o
- International and U.S.A. (U.K. version only)
i
channels* are available for regular channels.
*Germany version is International and ATIS
channels.
y DUALWATCH/TRI-WATCH SWITCH
[DW•TRI] (p. 10)
• Starts dualwatch when pushed momentarily.
• Starts tri-watch when pushed for 1 sec.
• Stops dualwatch/tri-watch when either is acti-
vated.
w CHANNEL UP/DOWN SWITCHES [Y]/[Z]
!
• Select an operating channel.
• Selects the SET mode condition of the item.
(p. 13)
• Set the squelch level in the squelch set mode.
(p. 7)
u SQUELCH SWITCH [SQL•MONI] (p. 7)
• Push this switch, then set the squelch level
with [Y]/[Z].
• Manually opens the squelch for channel mon-
itoring when pushed for 1 sec.
e CHANNEL 16 SWITCH [16•C]
• Selects Channel 16 when pushed. (p. 6)
• Selects the call channel when pushed for
1 sec.
• Enters call Channel write mode when the call
channel is selected and this switch is pushed
for 3 sec. (p. 9)
q
u
i ANTENNA (p. 20)
Connects the supplied antenna.
y
t
r
w
e
o VOLUME CONTROL [OFF/VOL]
Turns power ON and adjusts the audio level.
r SCAN/TAG SWITCH [SCN•TAG] (p. 12)
• Starts and stops normal or priority scan.
• Sets and clears the displayed channel as a
tag (scanned) channel when pushed for
1 sec.
! PTT SWITCH [PTT]
Push and hold to transmit; release to receive.
2
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2
PANEL DESCRIPTION
CAUTION!:
ï BATTERY CASE RELEASE SCREW
To remove the battery case:
When attaching or releasing a battery pack, make sure the
rubber seal is set in the groove of the battery pack/case
correctly. If the seal is not neatly in the groove it may be
damaged when attaching the battery pack/case.
If the seal is damaged, water resistant is not guaranteed.
Turn the screw counterclockwise, then pull the battery pack
in the direction of the arrow as shown below.
To attach the battery case:
Insert the battery case in the IC-M21 completely, then turn the
screw clockwise.
NOTE:
When attaching a battery pack/case, make sure dust etc.
does not adhere to the rubber seal. If dust etc. is on the seal
when attaching a battery pack/case, the water resistant may
be reduced.
NOTE: When removing or attaching the battery case, use a
coin or flat-head screwdriver to loosen or tighten the
bottom screw.
Make sure both the rubber seal (purple) is set to the groove
correctly and dust etc. does not adhere to it.
Screw position
when removing battery
OPEN
Screw position
when attaching battery
Correct position
Incorrect position
Rubber seal
Groove
OPEN
Battery pack/case
Battery pack/case
3
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2
PANEL DESCRIPTION
ꢁ Function display
q TRANSMIT INDICATOR (p. 8)
Appears while transmitting.
w BUSY INDICATOR (p. 8)
Appears when receiving a signal or when the squelch
opens.
q
w
e
r
t
e TAG CHANNEL INDICATOR (p. 12)
Appears when a tag channel is selected.
y
!
!
u
i
r SCAN INDICATOR (p. 12)
Blinks while scanning.
t CALL CHANNEL INDICATOR (p. 6)
Appears when the call channel is selected.
o
!
!
y LOCK INDICATOR (p. 7)
Appears while the lock function is activated.
u DUPLEX INDICATOR
Appears when a duplex channel is selected.
!
!
i DUALWATCH/TRI-WATCH INDICATORS (p. 10)
“DUAL” appears during dualwatch; “TRI” appears during
tri-watch.
4
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2
PANEL DESCRIPTION
o SUB CHANNEL READOUT
! TRANSMIT POWER INDICATOR
• Indicates Channel 16 during priority scan.
• Indicates Channel 16 during dualwatch or tri-watch.
(p. 10)
• “LOW” appears when low power is selected. (p. 8)
• “LOW” blinks when switching forced low power mode be-
cause of a high temperature error or low voltage.
• “MID”* appears when middle power is selected. (p. 8)
*Except Germany version.
• Indicates the SET mode item while in SET mode
! BATTERY INDICATOR
• No indicator appears when high power is selected.
Indicates remaining battery power.
Indication
Charging
required battery
No
Battery level
Full
Middle
! SQUELCH LEVEL INDICATOR (p. 7)
Shows squelch level when set.
This indicator can be also used as an S/RF meter when the
S/RF meter indicator setting is ON. (p. 16)
! SQUELCH LEVEL ADJUSTING INDICATOR (p. 7)
Appears while adjusting the squelch level.
! CHANNEL NUMBER READOUT
• Indicates the selected operating channel number.
• In SET mode, indicates the selected condition.
! CHANNEL GROUP INDICATOR (p. 6)
“ I ” appears when International; “ U ” appears when
U.S.A. (U.K. and Italian versions only); “ATIS” appears
when ATIS function is activated (Germany version only).
5
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BASIC OPERATION
3
ꢁ Channel selection
DInternational and U.S.A. channels
DChannel 16
There are 57 International and 57 U.S.A. channels. These
Channel 16 is the distress channel. It is used for establishing
initial contact with another station and for emergency
communications. Channel 16 is monitored during dualwatch
or tri-watch. While standing by you are required to monitor
Channel 16.
channel groups may be specified for the operating area.
q Push [DIAL] to select a regular channel.
w Push [Y]/[Z] switches to select a channel.
- “DUP” appears for duplex channels.
C
e To change the channel group, push [DIAL] for 1 sec.
- International and U.S.A. channels can be selected in sequence.
Push
16
DCall channel
Each regular channel group has a separate 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•C] for 1 sec. to select the call channel for the
selected channel group.
International channels
Push for 1 sec.
DIAL
- “CALL” and call channel number
appear.
-
Each channel group can have its
own call channel when programmed.
U.S.A. channels
6
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3
BASIC OPERATION
ꢁ Lock function
ꢁ Adjusting the squelch level
The IC-M21 has a squelch even though there is no control
knob for it. In order to receive signals properly, as well as for
scan to function, the squelch must be adjusted to a suitable
level.
This function electronically locks all keys, except [PTT],
[SQL•MONI] and [H/L•LOCK] to prevent accidental channel
changes and function access.
• Push [H/L•LOCK] for 1 sec. to turn the lock function ON and
OFF.
- Only [PTT], [H/L•LOCK] and [SQL•MONI] are functional.
Appears while the
lock function is used.
Appears durling squelch
level adjustment.
Each dot indicates the squelch level
(Level 10: Max. squelch level)
q Push [SQL•MONI], then adjust the squelch level with [Y]/[Z].
- “SQL” indicator and squelch level indicator appear.
- There are 11 squelch levels to choose from: 0 is completely
open; 10 is the maximum squelch level.
- When no keys are pushed for 5 sec., the transceiver returns to
normal condition.
w Push [SQL•MONI] again to return to normal condition.
7
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3
BASIC OPERATION
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 5 to 10 cm (2 to 4 inches) from your
mouth and speak at a normal voice level.
ꢁ Receiving and transmitting
CAUTION: Transmitting without an antenna may
damage the transceiver.
NOTE: The transceiver has a power save function to con-
serve the battery power and cannot be turned OFF. The
power save function activates automatically when no sig-
nal is received for 5 sec.
q Rotate [OFF/VOL] clockwise to turn power ON.
- Use the squelch function to mute any audio noise if necessary.
Refer to the previous page for details.
w Push* [SQL•MONI] for 1 sec., and rotate volume to set
audio output level.
*According to Monitor action selection in SET mode (p. 14).
e Push [Y]/[Z] to select the desired channel.
- When receiving a signal, “BUSY” appears and audio is emitted
from the speaker.
(The S/RF meter appears while S/RF meter turned ON in SET
mode.)
- Further adjustment of [OFF/VOL] may be necessary at this point.
q Power ON
w Set volume
r Push [H/L] to select the output power if necessary.
- “LOW” appears when low power is selected; “MID” appears when
middle power is selected; no indicator appears when high power
is selected.
t Push to
transmit
- Choose low power to conserve battery power, choose high power
for longer distance communications.
- Some channels are for low power only.
y Release to
w Set squelch
receive
level
t Push and hold [PTT] to transmit, then speak into the
microphone.
- “TX” appears.
w Set squelch level
e Set channel
r Set output
(The S/RF meter appears while S/RF meter is turned ON in SET
mode.)
power
- Channel 70 cannot be used for transmission (for GMDSS use).
y Release [PTT] to receive.
8
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3
BASIC OPERATION
ꢁ Call channel programming
The call channel switch is used to select Channel 9 by de-
fault, however, you can program your most often-used chan-
nels in each channel group for quick recall.
r Push [Y]/[Z] to select the de-
sired channel.
q Push [DIAL] for 1 sec. to select
the desired channel group (INT,
USA) to be programmed.
t Push [16•C] to program the dis-
played channel as the call chan-
nel.
- The call channel number and chan-
nel group stop flashing.
w Push [16•C] for 1 sec. to select
the call channel of the selected
channel group.
- “CALL” and call channel number
appear.
e Push [16•C] again for 3 sec.
(until long beep changes to 2
short beeps) to enter call chan-
nel programming condition.
- Call channel number and channel
group to be programmed flash.
ꢁ Automatic backlighting
This function is convenient for nighttime operation. The auto-
matic backlighting can be deactivated in SET mode. (p. 14)
• Push any key except for [PTT] to turn the backlighting ON.
- The backlighting is automatically turned OFF after 5 sec. of in-
activity.
9
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DUALWATCH/TRI-WATCH
4
ꢁ Description
Dualwatch monitors Channel 16 while you are receiving an-
other channel; tri-watch monitors Channel 16 and the call
channel while receiving another channel.
ꢁ Operation
q Select the desired operating channel.
w Push [DW•TRI] momentarily to start dualwatch; push
[DW•TRI] for 1 sec. to start tri-watch.
- “DUAL” flashes during dualwatch; “TRI” flashes during tri-watch.
- Beep tones sound when a signal is received on Channel 16.
- Tri-watch becomes dualwatch when receiving a signal on the call
channel.
DUALWATCH/TRI-WATCH SIMULATION
Call channel
e To cancel dualwatch/tri-watch, push [DW•TRI] again.
[Example]: Operating tri-watch on INT Channel 07.
Push for 1 sec.
Tri-watch starts.
TRI
DW
Dualwatch
Tri-watch
Signal is received
on call channel.
• 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].
Signal received on
Channel 16 takes
priority.
Tri-watch resumes
after the signal
disappears.
10
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SCAN OPERATION
5
ꢁ Scan types
Scanning is an efficient way to locate signals quickly over a
wide frequency range. The transceiver has a priority scan and
a normal scan.
Set the tag channels (channels to be scanned) before scan-
ning. Clear the tag channels which inconveniently stop scan-
ning, such as those used for digital communications.
NOTE: Choose priority or normal scan in SET mode. (p. 13)
PRIORITY SCAN
NORMAL SCAN
CH 01
CH 02
CH 01
CH 02
CH 88
CH 16
CH 03
CH88
CH 03
CH 05
CH 04
CH 05
CH 04
Priority scan searches through all tag channels in se-
quence while monitoring Channel 16. When a signal is de-
tected 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.
Normal scan, like priority scan, searches through all tag
channels in sequence. However, unlike priority scan, Chan-
nel 16 is not checked unless Channel 16 is set as a tag
channel.
11
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5
SCAN OPERATION
ꢁ Setting tag channels
ꢁ Starting a scan
For more efficient scanning, add desired channels as tag
channels or clear tag channels for unwanted channels. Chan-
nels set as non-tag channels will be skipped during scanning.
Tag channels can be assigned to each channel group (INT,
USA) independently.
Set scan type and scan resume timer in advance using SET
mode. (pgs. 13, 14)
q Select the desired channel group (INT, USA) by pushing
[DIAL] for 1 sec., if desired.
w Push [SCN•TAG] to start priority or normal scan.
- “SCAN” blinks in the function display.
- “16” appears during priority scan.
q Select the desired channel group (INT, USA) by pushing
[DIAL] for 1 sec., if desired.
- 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.)
- Push [Y]/[Z] to check tag channels, to change the scanning di-
rection or resume the scan manually.
w Select the desired channel to set as a tag channel.
e Push [SCN•TAG] for 1 sec. to set the displayed channel as
a tag channel.
- “TAG” appears in the function display.
r To cancel the tag channel setting, push [SCN•TAG] for 1
e To stop the scan, push [SCN•TAG].
- “SCAN” disappears.
sec.
- “TAG” disappears.
- Pushing [PTT], [16•C], [DIAL] or [DW•TRI] also stops the scan.
• Clearing all tag channels in the selected channel group
While pushing [SCN•TAG], turn the power ON to clear all
tag channels in the channel group.
Scan pauses when receiving a
signal and audio is emitted.
[Example]: Starting a normal scan.
Scan starts.
Push
Push
TAG
TAG
SCN
SCN
to stop the scan.
12
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SET MODE
6
ꢁ SET mode programming
SET mode is used to change the conditions of 11 transceiver
functions: beep tone, scan type, scan resure timer, auto scan,
monitor action, automatic backlighting, LCD contrast, auto
power save, self check, battery voltage and S/RF meter.
ꢁ SET mode items
DBeep tone “bP”
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.
• AUTO (At): Beep tone is linked with volume tone.
• 1–10: Beep tone scale is set from 1–10 scale (Max. is 10).
q Turn power OFF.
w While pushing [SQL•MONI], turn power ON and continue
pushing [SQL•MONI] until “bP” appears.
e Release [SQL•MONI].
r Push [Y]/[Z] to select the desired condition of the item.
t Push [SQL•MONI] to select the desired item, if necessary.
y To exit SET mode, turn the power OFF, then ON again, or
push [16•C].
Beep tone AUTO (default)
DPriority scan function “Pr”
The transceiver has 2 scan types. Normal scan and priority
scan. Normal scan searches all tag channels in the selected
channel group. Priority scan searches all tag channels in se-
quence while monitoring Channel 16.
SET MODE CONSTRUCTION
Battery
voltage
S/RF
meter
Scan
type
Scan resume
timer
Beep tone
Starting item
Self
check
Auto
scan
MONI
SQL
Push
Priority scan (default)
Automatic
backlighting
Monitor
action
LCD
contrast
Auto
power save
13
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6
SET MODE
DScan resume timer “St”
DMonitor action selection “Sq”
The scan resume timer can be selected as a pause (OFF) or
timer scan (ON). When OFF is selected, the scan pauses
until a received signal disappears. When ON is selected, the
scan pauses for 5 sec. after receiving a signal and then re-
sumes even if the signal is still being received.
The monitor function cuts off the squelch function temporarily.
This selection contains PUSH or HOLD settings as shown
below.
• PUSH (Pu): After pushing the [SQL•MONI] for 1 sec., the
squelch function is cut off until [SQL•MONI] is
released. (default)
• HOLD (Ho): After pushing the [SQL•MONI] for 1 sec., the
squelch function is cut off continuously until
another key is pushed.
Scan timer OFF (default)
DAuto scan function “AS”
Monitor switch PUSH (default)
While in standby, this function automatically starts the desired
scan (normal or priority scan) 30 sec. after operation.
• Scan indicator blinks while scanning.
DAutomatic backlighting “bL”
This function is convenient for nighttime operation. The auto-
matic backlighting turns the backlighting ON when pushing
any key except for [PTT].
•
The backlighting is automatically turned OFF after 5 sec. of inactivity.
Auto scan OFF (default)
Automatic backlighting ON (default)
14
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6
SET MODE
DLCD contrast selection “LC”
The contrast of the LCD can be adjusted from 4 levels.
• 1 (low contrast) – 4 (high contrast); 3 (default)
DSelf check function “SC”
The self check function checks transceiver conditions by it-
self, and informs you in case a problem is found. The follow-
ing items are checked after the power is turned ON, then it
switches to operation mode.
• Temperature (Outside of –15°C to +55°C)
• Connected battery voltage
• Water intrusion
LCD contrast (default)
DAuto power save function “PS”
The power save function reduces current drain by deactivat-
ing the receiver circuit for preset intervals.
Self check OFF (default)
When error messages as shown below are displayed, see
trouble shooting for advice (p. 23).
Error messages
Auto power save ON (default)
Temperature error Battery voltage error Water intrusion error
15
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6
SET MODE
DBattery voltage indicator “bt”
This function contains display or non-display settings of the
SET MODE LIST
Indication
voltage of the connected battery pack when the power is ON.
• The voltage of the connected battery pack is displayed for 2 sec.
after power is turned ON.
Function
Switch
Beep tone
"bP"
OFF / Auto* / 1 10
OFF / ON*
OFF* / ON
OFF* / ON
Push* / Hold
ON* / OFF
3* / 1 4
Scan type selection
Scan resume timer
"Pr"
"St"
Auto scan function
"AS"
"Sq"
"bL"
"LC"
"PS"
"SC"
"bt"
Battery voltage OFF (default)
Monitor switch selection
Automatic backlighting
LCD contrast selection
Auto power save function
Self check function
DS-meter/RF meter indicator “Sr”
This function contains display or non-display setting of the
S-meter/RF meter.
ON* / OFF
OFF* / ON
OFF* / ON
Battery voltage indicator
S-meter/RF meter indicator
S-meter/RF meter OFF (default)
"Sr"
OFF* / ON
*default setting
16
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BATTERY CHARGING
7
ꢁ Battery charging
Prior to using the transceiver for the first time, the Ni-Cd bat-
ꢁ Battery cautions
NEVER incinerate used Ni-Cd batteries. Internal battery gas
teries must be fully charged for optimum life and operation.
may cause an explosion.
CAUTION: To avoid damage to the transceiver, turn it OFF
NEVER immerse batteries in water. If the battery case be-
comes wet, be sure to wipe it dry BEFORE attaching it to the
transceiver.
while charging.
• Recommended temperature range for charging:
+10°C to +40°C (+50°F to +104°F)
• Use the supplied charger (BC-150) only. NEVER use an
other manufactures charger.
NEVER short terminals of the battery case. Also, current may
flow into nearby metal objects so be careful when placing bat-
tery cases in handbags, etc.
NEVER connect DC power to the battery case when in-
stalling alkaline batteries. Such a connection will damage
the transceiver.
If your Ni-Cd batteries seem to have no capacity even after
being charged, completely discharge them by leaving the
power ON overnight. Then, fully charge the Ni-Cd batteries
again. If the batteries still do not retain a charge (or very little),
new batteries must be purchased.
17
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7
BATTERY CHARGING
ï Charging connections
ꢁ Installing batteries in the
q Attach the BC-150 to a flat surface, such as desk or cabin, etc., if
desired.
w Connect the AC adapter (BC-147E) as shown below.
e Insert the battery pack with/without the transceiver into the
charger.
battery case
(Not supplied with some versions)
When using a battery case attached to the transceiver, install
6 × AA(R6) size alkaline batteries as illustrated below.
• The charge indicator lights green.
r Charge the battery pack approx. 8 hours, depending on the re-
maining power condition.
q Remove the battery case from the transceiver.
w Install 6 × AA(R6) size alkaline batteries.
• Be sure to observe the correct polarity.
CAUTION: DO NOT charge BP-224 more than 12 hours.
Otherwise, BP-224 will be damaged. BP-224 must
be charged for 8–12 hours only.
CAUTION:
• When installing batteries, make sure they are all the
same brand, type and capacity. Also, do not mix new and
old batteries together.
• Keep battery contacts clean. It’s a good idea to clean bat-
tery terminals once a week.
IC-M21
BP-224
Charge indicator
Lights green when
BP-224 (with/without
IC-M21) is inserted.
Supplied screws
AC adapter
(BC-147E; Not
supplied with
BC-150
some versions)
18
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7
BATTERY CHARGING
ꢁ Optional battery chargers
DRapid charging with the BC-119N+AD-103
The optional BC-119N provides rapid charging of battery
packs. The following are additionally required.
• AD-103
DRapid charging with the BC-121N+AD-103
The optional BC-121N allows up to 6 battery packs to be
charged simultaneously. The following are additionally re-
quired.
• An AC adapter (may be supplied with BC-119N depending
on version).
• Six AD-103.
• An AC adapter (BC-124) or the DC power cable (OPC-656).
IC-M21
BP-224
IC-M21
BP-224
AD-103 charger
adapters are installed
in each slot.
(purchased
AC adapter
OPC-515L or
CP-17L
separately)
AD-103 charger
adapter is installed
in BC-119N.
AC adapter
(BC-145E)
DC power cable
(Connect with the DC power supply;
13.8 V/at least 7 A)
19
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SUPPLIED ACCESSORIES AND ATTACHMENTS
8
DSupplied accessories
The following accessories are supplied:
DFlexible antenna
Qty. Connect the supplied flexible
antenna to the antenna con-
q Flexible antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 nector.
w Swivel belt clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
e Handstrap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
r Battery case (BP-223)* . . . . . . . . . . . . . . . . . . . . . . . . . . .1
t Ni-Cd battery pack (BP-224) . . . . . . . . . . . . . . . . . . . . . . .1
y AC adapter (BC-147E)* . . . . . . . . . . . . . . . . . . . . . . . . . .1
u Battery charger (BC-150) . . . . . . . . . . . . . . . . . . . . . . . . .1
i Screws for the BC-150 (M3.5 × 20) . . . . . . . . . . . . . . . . .2
* Not supplied with some versions.
CAUTION: Transmitting
without an antenna may
damage the transceiver.
DHandstrap
Slide the handstrap through
the loop on the side of the
transceiver as illustrated at
right. Facilitates carrying.
20
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8
SUPPLIED ACCESSORIES AND ATTACHMENTS
DSwivel belt clip
To attach:
q Slide the stopper into the plastic loop on the back of the
e Insert the stopper to the back of the belt clip.
transceiver.
w Clip the belt clip to a part of your belt.
Once the transceiver is locked in place, it will swivel 360 de-
grees.
21
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8
SUPPLIED ACCESSORIES AND ATTACHMENTS
To remove:
q Turn the transceiver upside down, and then lift to release
the transceiver from the belt clip.
R
CAUTION!
HOLD THE TRANSCEIVER TIGHTLY, WHEN ATTACH-
ING OR REMOVING THE TRANSCEIVER FROM THE
BELT CLIP.
If the transceiver is accidentally dropped and the swivel
belt clip’s stopper is scratched or damaged, the swivel
belt clip may not work properly.
w Release the belt clip.
e Push the top of the stopper towards the transceiver and out
at the same time, then push it downwards and free of the
plastic loop.
22
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TROUBLESHOOTING
9
PROBLEM
POSSIBLE CAUSE
• The battery is exhausted.
SOLUTION.
REF.
p. 17
• Recharge the battery pack.
No power comes ON.
• Bad connection to the battery pack.
• Check the connection to the transceiver.
p. 3
• Squelch level is too deep.
• Volume level is too low.
• Speaker has been exposed to water.
• Set squelch to the threshold point.
• Set [OFF/VOL] to a suitable level.
• Drain water from the speaker.
No sound comes from
the speaker.
p. 7
p. 8
—
Transmitting is impossi- • Some channels are for low power or re- • Change channels.
pgs. 2, 4
ble, or high power can ceive only.
not be selected.
• The battery is exhausted.
• The output power is set to low.
• Recharge the battery pack.
• Push [H/L] to select high power.
p. 17
p. 2
The display channel • Lock function is activated.
• Push [H/L•LOCK] for 1 sec. to cancel the p. 2
cannot be changed.
function.
Scan does not start.
No beeps sound.
• “TAG” channels are not programmed.
• Beep tones are turned OFF.
• Set the desired channels as “TAG” channels. p. 12
• Set the beep tones to AUTO or 1–10 in SET p. 13
mode.
Self check error.
• Transceiver’s inside temperature is below • Leave the transceiver at room temperature
—
(Temperature error)
–20°C (–4°F) or above +60°C (+120°F).
for a while. Turn the power ON to check if the
internal temperature has returned to normal.
Self check error.
(Battery voltage error)
• The connected battery pack’s voltage is • Verify the battery voltage is correct.
more than 11 V.
—
—
Self check error.
(Water intrusion error)
• Water has entered the transceiver.
• Have the transceiver checked at your local
distributor or dealer to see whether the trans-
ceiver works properly or not.
23
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10
CHANNEL LIST
International channels
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Transmit Receive
Frequency (MHz)
Frequency (MHz)
Transmit Receive
CH
CH
CH
CH
CH
CH
Transmit Receive
Transmit Receive
Transmit Receive
Transmit Receive
01 156.050 160.650
02 156.100 160.700
03 156.150 160.750
04 156.200 160.800
11 156.550 156.550
12 156.600 156.600
13 156.650 156.650
14 156.700 156.700
21 157.050 161.650
22 157.100 161.700
23 157.150 161.750
24 157.200 161.800
25 157.250 161.850
26 157.300 161.900
27 157.350 161.950
28 157.400 162.000
60 156.025 160.625
61 156.075 160.675
62 156.125 160.725
63 156.175 160.775
64 156.225 160.825
72 156.625 156.625
73 156.675 156.675
74 156.725 156.725
82 157.125 161.725
83 157.175 161.775
84 157.225 161.825
85 157.275 161.875
86 157.325 161.925
87 157.375 157.375
88 157.425 157.425
65 156.275 160.875 75 156.775 156.775
66 156.325 160.925 76 156.825 156.825
05 156.250 160.850 15 156.750 156.750
06 156.300 156.300 16 156.800 156.800
07 156.350 160.950 17 156.850 156.850
67 156.375 156.375
68 156.425 156.425
69 156.475 156.475
77 156.875 156.875
78 156.925 161.525
79 156.975 161.575
80 157.025 161.625
81 157.075 161.675
08 156.400 156.400
09 156.450 156.450
10 156.500 156.500
18 156.900 161.500
19 156.950 161.550
20 157.000 161.600
Rx only
70
156.525
71 156.575 156.575
USA channels (for U.K. version only)
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
CH
Frequency (MHz)
CH
Frequency (MHz)
CH
Frequency (MHz)
CH
CH
CH
Transmit Receive
Transmit Receive
Transmit Receive
Transmit Receive
Transmit Receive
Transmit Receive
01A 156.050 156.050
-- - - - - - -
03A 156.150 156.150
-- - - - - - -
05A 156.250 156.250
12 156.600 156.600 22A 157.100 157.100 64A 156.225 156.225
77 156.875 156.875
86 157.325 161.925
13 156.650 156.650 23A 157.150 157.150 65A 156.275 156.275 78A 156.925 156.925 86A 157.325 157.325
14 156.700 156.700
15 156.750 156.750
16 156.800 156.800
24 157.200 161.800 66A 156.325 156.325 79A 156.975 156.975
87 157.375 161.975
25 157.250 161.850 67 156.375 156.375 80A 157.025 157.025 87A 157.375 157.375
26 157.300 161.900
27 157.350 161.950
28 157.400 162.000
68 156.425 156.425 81A 157.075 157.075
69 156.475 156.475 82A 157.125 157.125 88A 157.425 157.425
Rx only
71 156.575 156.575
72 156.625 156.625 84A 157.225 157.225
73 156.675 156.675 85 157.275 161.875
74 156.725 156.725 85A 157.275 157.275
88 157.425 162.025
06 156.300 156.300 17 156.850 156.850
07A 156.350 156.350 18A 156.900 156.900
70
156.525 83A 157.175 157.175
84 157.225 161.825
08 156.400 156.400 19A 156.950 156.950 37A 157.850 157.850
09 156.450 156.450 20 157.000 161.600 61A 156.075 156.075
10 156.500 156.500 20A 157.000 157.000 -- - - - - - -
11 156.550 156.550 21A 157.050 157.050 63A 156.175 156.175
Low power only.
24
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SPECIFICATIONS AND OPTIONS
11
ꢁ Specifications
ꢁ Options
• GENERAL
DBATTERY CASE AND PACK
Frequency coverage
: Transmit 156.000–161.450 MHz
• BP-223 BATTERY CASE
Receive 156.000–163.425 MHz
: FM (16K0G3E)
Battery case for 6 × AA (R6) alkaline cells. The same as supplied
with the transceiver depending on versions.
• BP-224 Ni-Cd BATTERY PACK
7.2 V/750 mAh Ni-Cd battery pack. The same as supplied with the
transceiver depending on versions.
Mode
Channel spacing
: 25 kHz
Current drain (at 7.5 V DC) : TX High (5 W)
1.5 A typical
0.7 A typical
200 mA typical
20 mA typical
(1 W)
Max. audio
Power save
Frequency stability
Operating temperature range : –15°C to +55°C
Dimensions
(Projections not included)
:
1.5 kHz (–15°C to +55°C)
DCHARGERS
• BC-119N DESKTOP CHARGER + AD-103 CHARGER ADAPTER
+ BC-145 AC ADAPTER
: 61 (W) × 135(H) × 41(D) mm
213⁄32(W) × 55⁄16(H) × 15⁄8(D) inch
For rapid charging of battery packs. An AC adapter is supplied with
the charger. Charging time: approx. 1.5 to 2 hours
• BC-121N MULTI-CHARGER + AD-103 CHARGER ADAPTER (6 pcs.)
+ BC-124 AC ADAPTER
For rapid charging of up to 6 battery packs (six AD-103’s are re-
quired) simultaneously. An AC adapter may be supplied depending
on version. Charging time: approx. 1.5 to 2 hours.
• BC-150 DESKTOP CHARGER + BC-147E AC ADAPTER
Used for regular charging of battery pack. The same as supplied
with the transceiver. Charging time: approx. 8 hours
Weight (approx.; with BP-224) : 360g (12.7 oz)
• TRANSMITTER
Output power (at 7.5 V DC) : 5 W (Hi), 3 W (Mid), 1 W (Low) or
1 W (Hi), 0.5 W (Low) <(#07)FRG>
Modulation system
Max. frequency deviation
:
:
Variable reactance frequency modulation
5 kHz
Audio harmonics distortion : Less than 10 % (at 60 % mod.)
Spurious emissions
: Less than 0.25 µW
• RECEIVER
Receive system
Sensitivity (20 dB SINAD)
Squelch sensitivity (at threshold): Less than 0 dBµ EMF (typical)
Intermodulation rejection ratio : 68 dB
Spurious response rejection ratio : 70 dB
Adjacent channel selectivity : 70 dB
Hum and noise ratio
Audio output power
: Double-conversion superheterodyne
: Less than –2 dBµ EMF (typical)
DBELT CLIPS
• MB-68 BELT CLIP
Universal belt clip for attaching to your belt.
• MB-74 BELT CLIP
Exclusive alligator-type belt clip.
• MB-87 SWIVEL BELT CLIP
: More than 40 dB
: 0.2 W typical at 10% distortion with an
8 Ω load
Belt clip for swivel type. The same as supplied with the transceiver.
All stated specifications are subject to change without notice or obligation.
25
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DECLARATION
OF CONFORMITY
We Icom Inc. Japan
1-1-32 Kamiminami, Hirano-ku,
Osaka 547-0003 Japan
0560
Place and date of issue
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: VHF MARINE TRANSCEIVER
Type-designation: iC-m21
Version (where applicable):
Authorized representative name
This compliance is based on conformity with the following harmonised
standards, specifications or documents:
T. Maebayashi
General Manager
i)
EN 301 178-2
V1.1.1 (2000-08)
1997
ii) EN 60945
iii) EN 60950
1992
iv) EN 300 698-2
V1.1.1 ( 2000-8)
v)
vi)
Signature
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Count on us!
< Intended Country of Use >
GER
NED
GRE
IRL
ITA
AUT
LUX
DEN
SUI
BEL
SWE
FRA
GBR
ESP
FIN
POR
A-6117H-1EU
Printed in Japan
© 2001 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0002 Japan
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