!IC-M421-3.qxd 06.5.
!IC-M421-3.qxd 06.5.26 1:43 PM Page i (1,1) New2001 FOREWORD IMPORTANT Thank you for purchasing this Icom product. The IC-M421 VHF MARINE TRANSCEIVER is designed and built with Icom’s state of the art technology and craftsmanship. With proper care, this product should provide you with years of troublefree operation.
!IC-M421-3.qxd 06.5.26 1:43 PM Page ii (1,1) New2001 IN CASE OF EMERGENCY INSTALLATION NOTE If your vessel requires assistance, contact other vessels and the Coast Guard by sending a distress call on Channel 16. 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). USING CHANNEL 16 DISTRESS CALL PROCEDURE 1. “MAYDAY MAYDAY MAYDAY.” 2. “THIS IS ...............” (name of vessel) 3.
!IC-M421-3.qxd 06.5.26 1:43 PM Page iii (1,1) New2001 DOC 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.
!IC-M421-3.qxd 06.5.
!IC-M421-3.qxd 06.5.26 1:43 PM Page v (1,1) New2001 PRECAUTION 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 use reverse polarity. This will ruin the transceiver. BE CAREFUL! The transceiver rear panel will become hot when operating continuously for long periods.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 1 (1,1) OPERATING RULES D PRIORITIES • Read all rules and regulations pertaining to priorities and keep an up-to-date copy handy. Safety and distress calls take priority over all others. • You must monitor Channel 16 when you are not operating on another channel. • False or fraudulent distress signals are prohibited and punishable by law. D PRIVACY • Information overheard but not intended for you cannot lawfully be used in any way.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 2 (1,1) New2001 2 PANEL DESCRIPTION ■ Panel description i Speaker u q POWER/VOLUME CONTROL [VOL] (p. 8) ➥ Rotate to turn the transceiver power ON or OFF. ➥ Rotate to adjust the audio level. w SQUELCH CONTROL [SQL] (p. 8) Rotate to set the squelch threshold level. y o t Function !0 display (p. 4) q r e w e DISTRESS KEY [DISTRESS] (p. 22) Transmits a distress call when pushed for 5 sec. r ENTER KEY [ENT] Sets the DSC menu, a channel comment, etc.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 3 (1,1) New2001 PANEL DESCRIPTION y SCAN/TAG CHANNEL KEY [SCAN•TAG] (p. 13) ➥ Push to start and stop the normal or priority scan when tag channels are programmed. ➥ Push for 1 sec. to set the displayed channel as a tag (scanned) channel. ➥ While pushing [HI/LO] located on the microphone, push for 3 sec. to clear or set all tag channels in the selected channel group. 2 o CHANNEL/DUALWATCH/TRI-WATCH KEY [CH•DUAL] ➥ Push to select the regular channel. (pgs.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 4 (1,1) New2001 2 PANEL DESCRIPTION ■ Function display q -CALLING !1 w e r t r DUPLEX INDICATOR (p. 7) Appears when a duplex channel is selected. y BUSY-INT---25W-DUP-TAGNORMAL-SCAN23 34.154N135 34.351EUTC-12:00- • Duplex channel has a different transmit frequency and receiving frequency. i t CHANNEL GROUP INDICATOR (p. 7) Indicates whether an International “INT” or U.S.A. “USA” channel is selected. (depends on version) o y TAG CHANNEL INDICATOR (p.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 5 (1,1) New2001 PANEL DESCRIPTION 2 ■ Microphone o TIME ZONE INDICATOR ➥ Shows the current time data when a GPS receiver is connected. ➥ “No Time” appears when no GPS receiver is connected and no time data is input manually. ➥ “Local” appears when the offset time data is set. (p. 43) !0 LOW BATTERY INDICATOR “ ” blinks when the battery voltage drops to approx. 11 V DC or below.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 6 (1,1) New2001 3 BASIC OPERATION ■ Channel selection D Channel 16 D Call channel 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•C] momentarily to select Channel 16.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 7 (1,1) New2001 BASIC OPERATION D International channels and U.S.A. channels* The IC-M421 is pre-programmed with 57 International (INT) channels in addition to 59 U.S.A. channels*. These channel groups may be specified for the operating area. q Push [CH•DUAL] to select a regular channel. w Push both [▲] and [▼] on the transceiver to change the channel group, if necessary. • International and U.S.A.* channels can be selected in sequence.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 8 (1,1) New2001 3 BASIC OPERATION ■ Receiving and transmitting CAUTION: Transmitting without an antenna may damage the transceiver. q Rotate [VOL] 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. While in the DSC operation, please make sure you set the squelch correctly.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 9 (1,1) New2001 BASIC OPERATION 3 ■ Call channel programming You can program the call channel with your most often-used channel in each channel group for quick recall. q Push both [▲] and [▼] on the transceiver to select the desired channel group (International and U.S.A.*) to be programmed. - INTL -INT INT---25W-DUP 25W DUP-TAG TAG23 34.154N 34.154N135 34.351E 34.351E- UTC UTC-12:00 12:00- *U.K. version only w Push [16•C] for 1 sec.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 10 (1,1) New2001 3 BASIC OPERATION ■ Channel comments ■ Microphone lock function Memory channels can be labelled with alphanumeric comments of up to 10 characters each for easy channel recognition. More than 9 characters comment scrolls automatically at the channel comment indicator after the channel selection. The microphone lock function electrically locks [Y]/[Z] and [HI/LO] keys on the supplied microphone.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 11 (1,1) DUALWATCH/TRI-WATCH 4 ■ Description ■ Operation Dualwatch monitors Channel 16 while you are receiving another channel; tri-watch monitors Channel 16 and the call channel while receiving another channel. q Select Dualwatch or Tri-watch in set mode. (p. 46) w Push [▲] or [▼] to select the desired operating channel. e Push [CH•DUAL] for 1 sec. to start Dualwatch or Tri-watch. • “DUAL 16” appears during dualwatch; “TRI 16” appears during tri-watch.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 12 (1,1) New2001 5 SCAN OPERATION ■ Scan types Scanning is an efficient 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 those for digital communication use. (Refer to right page for details.) Choose priority or normal scan in set mode. (p.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 13 (1,1) New2001 SCAN OPERATION 5 ■ Setting tag channels ■ Starting a scan For more efficient scanning, add the desired channels as tag channels or clear the tag for unwanted channels. Channels are not tagged will be skipped during scanning. Tag channels can be assigned to each channel group (International and U.S.A.*) independently. Set scan type (priority or normal scan) and scan resume timer in advance using set mode. (p.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 14 (1,1) New2001 6 DSC OPERATION ■ MMSI code programming The 9-digit MMSI (Maritime Mobile Service Identity: DSC self ID) code can be programmed at power ON. This code programming can be performed only once. q Turn power OFF. w While pushing [MENU], turn power ON to enter MMSI code programming condition. e After the display appears, release [MENU]. r Push [MENU] again to enter the DSC menu. t Push [▲] or [▼] to select “Set up,” push [ENT].
!IC-M421-3.qxd 06.5.26 1:43 PM Page 15 (1,1) New2001 DSC OPERATION 6 ■ MMSI code check The 9-digit MMSI (DSC self ID) code can be checked. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT]. --DSC Menu-Select Item Polling Request Received Calls Distress Setting ˘Set up ≤ t Push [CLR] or [▼] to select “Exit,” push [ENT]. • Returns to the DSC menu. • Repeat again to return to the normal operation condition.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 16 (1,1) New2001 6 DSC OPERATION ■ DSC individual ID A total of 100 DSC address IDs can be programmed and named with up to 10 characters. D Programming Address ID q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT]. --DSC Menu-Select Item Polling Request Received Calls Distress Setting ˘Set up --DSC Menu-Add:Individual ID Input 9 digits _________ ≤ ≥ e Push [▲] or [▼] to select “Add:INDV ID,” push [ENT].
!IC-M421-3.qxd 06.5.26 1:43 PM Page 17 (1,1) New2001 DSC OPERATION 6 D Deleting address ID q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT]. --DSC Menu-Select Item Polling Request Received Calls Distress Setting ˘Set up ≤ ≥ e Push [▲] or [▼] to select “DEL:INDV ID,” push [ENT]. • When no address ID is programmed, “No ID” is displayed. Push [CLR] to exit the condition.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 18 (1,1) New2001 6 DSC OPERATION D Programming Group ID q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT]. --DSC Menu-Select Item Polling Request Received Calls Distress Setting ˘Set up ≤ ≥ e Push [▲] or [▼] to select “Add:Group ID,” push [ENT].
!IC-M421-3.qxd 06.5.26 1:43 PM Page 19 (1,1) New2001 DSC OPERATION 6 D Deleting group ID q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT]. --DSC Menu-Select Item Polling Request Received Calls Distress Setting ˘Set up ≤ ≥ e Push [▲] or [▼] to select “DEL:Group ID,” push [ENT]. • When no group ID is programmed, “No ID” is displayed. Push [CLR] to exit the condition.
!IC-M421-3.qxd 06.5.26 1:43 PM Page 20 (1,1) New2001 6 DSC OPERATION ■ Position and time programming A distress call should include the ship’s position and time data. If no GPS is connected, your position and UTC (Universal Time Coordinated) time should be input manually. They are included automatically when a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is connected. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Position Input,” and push [ENT].
!IC-M421-3.qxd 06.5.26 1:43 PM Page 21 (1,1) New2001 DSC OPERATION 6 ■ Position and Time indication r After setting the longitude data, push [ENT] to set the time information appears. Set the current UTC time with [▲] or [▼], then push [ENT]. • Push [CH•DUAL] or [16•C] to move the cursor forward or backward, respectively. • Push [SCAN•TAG] to clear the UTC time data. • Push [CLR] to cancel and exit the condition to the DSC menu.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 22 (1,1) New2001 6 DSC OPERATION ■ Distress call A distress call should be transmitted, if in the opinion of the Master, the ship or a person is in distress and requires immediate assistance. NEVER USE THE DISTRESS CALL WHEN YOUR SHIP OR A PERSON IS NOT IN AN EMERGENCY. A DISTRESS CALL CAN BE USED ONLY WHEN IMMEDIATE HELP IS NEEDED. e After transmitting the distress call, the transceiver waits for an acknowledgment call on Ch 70.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 23 (1,1) New2001 DSC OPERATION ➥ A distress alert contains (default); • Nature of distress: Undesignated distress • Position data : GPS or manual input position data held for 23.5 hrs or until the power is turned OFF. ➥ The distress call is repeated every 3.5–4.5 min., until receiving an ‘acknowledgement.’ ➥ Push [CLR] to cancel the ‘Call repeat’ mode.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 24 (1,1) New2001 6 DSC OPERATION When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is connected, next steps r, t (Current position/time programming) do not appear. Go to step y. r The position information appears. Set your latitude data using [▲] or [▼]. After setting the latitude data, push [ENT] to set your longitude data. • Push [CH•DUAL] or [16•C] to move the cursor forward or backward, respectively.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 25 (1,1) New2001 DSC OPERATION i After receiving the acknowledgment, reply using the microphone. INT 25W TAG RCV DTRS ACK ➥ A distress alert contains (default); • Nature of distress: Selected nature of the distress • Position data : GPS or manual input position data held for 23.5 hrs or until the power is turned OFF. ➥ The distress call is repeated every 3.5–4.5 min., until receiving an ‘acknowledgement.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 26 (1,1) New2001 6 DSC OPERATION r Push [▲] or [▼] to select a desired intership channel or “Manual Input,” push [ENT]. • Intership channels are already preset into the transceiver in recommending order. --DSC Menu-Select Intership CH ˘08 69 77 ≥ --DSC Menu-Individual Call Ready Push t Push [ENT] to transmit the individual call. • If Channel 70 is busy, the transceiver stands by until the channel becomes clear.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 27 (1,1) New2001 DSC OPERATION 6 D Transmitting an individual acknowledgement When receiving an individual call, you can transmit an acknowledgement (‘Able to comply’ or ‘Unable to comply’) by using the on screen prompts (see page 38 for details). Alternatively, you can send an acknowledgement through the menu system as follows. r Push [▲] or [▼] to select that you can comply to the call or not from “Able to Comply” or “Unable to Comply,” then push [ENT].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 28 (1,1) New2001 6 DSC OPERATION D Transmitting a group call The group call function allows you to transmit a DSC signal to a specific group only. --DSC Menu-Select Intership CH ˘08 69 77 ≥ --DSC Menu-Group Call Ready q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Group Call,” and push [ENT].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 29 (1,1) New2001 DSC OPERATION 6 D Transmitting an all ships call Large ships use Channel 70 as their ‘listening channel.’ When you want to announce a message to these ships, use the all ships call function. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “All Ships Call,” and push [ENT]. --DSC Menu-Select Item ˘Position Input Individual Call Group Call ˘All Ships Call r Push [ENT] to transmit the all ships call.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 30 (1,1) New2001 6 DSC OPERATION D Transmitting a position request call Transmit a position request call when you want to know a specific ship’s current position, etc. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Position Request,” and push [ENT]. --DSC Menu-Select Item ˘Individual Call Group Call All Ships Call ˘Position Request ≤ ≥ e Push [▲] or [▼] to select the desired pre-programmed individual address or “Manual Input,” push [ENT].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 31 (1,1) New2001 DSC OPERATION 6 D Transmitting a position report call Transmit a position report call when you want to announce your own position to a specific ship and to get an answer, etc. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Position Report,” and push [ENT].
!IC-M421-3.qxd 06.5.29 4:34 PM Page 32 (1,1) New2001 6 DSC OPERATION t After setting the longitude data, push [ENT] to set the time information appears. Set the current UTC time with [▲] or [▼], then push [ENT]. • Push [CH•DUAL] or [16•C] to move the cursor forward or backward, respectively. • Push [SCAN•TAG] to clear the UTC time data. • Push [CLR] to cancel and exit the condition to the DSC menu.
!IC-M421-3.qxd 06.5.29 4:35 PM Page 33 (1,1) New2001 DSC OPERATION 6 D Transmitting a polling request call Transmit a polling request call when you want to know a specific ship is in the communication area, etc. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Polling Request,” and push [ENT]. --DSC Menu-Select Item ˘All Ships Call Position Request Position Report ˘Polling Request r Push [ENT] to transmit the polling request call.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 34 (1,1) New2001 6 DSC OPERATION D Transmitting a position reply call Transmit a position reply call when a position request call is received. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Position Reply,” and push [ENT]. • “Position Reply” item appears after a position request call is received.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 35 (1,1) New2001 DSC OPERATION 6 D Transmitting a position report reply call t After setting the longitude data, push [ENT] to set the time information appears. Set the current UTC time with [▲] or [▼], then push [ENT]. • Push [CH•DUAL] or [16•C] to move the cursor forward or backward, respectively. • Push [SCAN•TAG] to clear the UTC time data. • Push [CLR] to cancel and exit the condition to the DSC menu.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 36 (1,1) New2001 6 DSC OPERATION D Transmitting a polling reply call Transmit a polling reply call when a polling request call is received. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Polling Reply,” and push [ENT]. • “Polling Reply” item appears after a polling request call is received.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 37 (1,1) New2001 DSC OPERATION 6 ■ Receiving DSC calls D Receiving a distress call D Receiving a distress acknowledgement While monitoring Channel 70 and a distress call is received: ➥ The emergency alarm sounds for 2 minutes. While monitoring Channel 70 and a distress acknowledgement to other ship is received: ➥ The emergency alarm sounds for 2 minutes. • Push [CLR] to stop the alarm.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 38 (1,1) New2001 6 DSC OPERATION D Receiving an individual call D Receiving a group call While monitoring Channel 70 and an individual call is received: ➥ The emergency alarm or beeps sound depending on the received category. ➥ “RCV INDV” appears in the display. ➥ Push [CLR] to stop the beep, then push [ENT] to reply the call and select the channel specified by the calling station for voice communication (depending on your replying condition see p.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 39 (1,1) New2001 DSC OPERATION 6 D Receiving a geographical area call D Receiving a position request call While monitoring Channel 70 and a geographical area call (for the area you are in) is received: ➥ Emergency alarm or beeps sound depending on the received category. ➥ “RCV GEOGRAPH” appears in the display. While monitoring Channel 70 and a position request call is received: ➥ “RCV POS REQ” appears in the display.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 40 (1,1) New2001 6 DSC OPERATION D Receiving a polling request call D Receiving a position report reply call While monitoring Channel 70 and a polling request call is received: ➥ “RCV POLL REQ” appears in the display. ➥ Push [CLR] to stop the beep, then push [ENT] to reply to the call; push [CLR] to ignore the call. While monitoring Channel 70 and a position report reply call is received: ➥ “RCV POS RPY” appears in the display.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 41 (1,1) New2001 DSC OPERATION 6 ■ Received messages The transceiver automatically stores up to 20 distress messages and 20 other messages. The messages can be used as an assistance to the logbook. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Received Calls,” and push [ENT]. --DSC Menu-Select Item ˘Position Request Position Report Polling Request ˘Received Calls w Push [▲] or [▼] to scroll to the desired message, push [ENT].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 42 (1,1) New2001 6 DSC OPERATION D Other messages q Push [▲] or [▼] to select “Other,” push [ENT]. --DSC Menu-Select Message Distress ˘Other w Push [▲] or [▼] to scroll to the desired message, push [ENT]. • Messages which are blinking have not read. --DSC Menu-Select Message All Ships Call 01 Group Call 02 ˘Individual Call 03≥ 42 e Push [▲] or [▼] to scroll the message.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 43 (1,1) New2001 DSC OPERATION 6 ■ DSC Set mode r Set the offset time from the UTC (Universal Time Coordinated) time using [▲] or [▼]. D MMSI code check (See p. 15 for detail) D Add Address ID (See p. 16 for detail) D Delete Address ID (See p. 17 for detail) • Push [CH•DUAL] or [16•C] to move the cursor forward or backward, respectively. • Push [SCAN•TAG] to clear the offset time data. • Push [CLR] to cancel and exit the condition to the set up menu.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 44 (1,1) New2001 6 DSC OPERATION D Automatic acknowledgement This item sets the automatic acknowledgement function ON or OFF. When a position request, position report or polling request call is received, transceiver automatically transmits a position request reply, position report reply or polling reply call, respectively. q Push [MENU] to enter the DSC menu. w Push [▲] or [▼] to select “Set up,” and push [ENT].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 45 (1,1) SET MODE ■ Set mode programming Set mode is used to change the conditions of the transceiver’s functions: scan type (normal or priority), scan resume timer, dual/tri-watch, transceiver’s beep tone, backlight and LCD contrast. Available functions--Set may differMode-depending on dealer setting. ˘Scan Type q Turn power Scan OFF. Timer Dual/Tri w While pushing [16•C], turn power ON to enter set mode. Beep e After the display appears, release [16•C].
!IC-M421-3.qxd 06.5.26 1:44 PM Page 46 (1,1) New2001 7 SET MODE D Dual/Tri-watch D Backlight Select the watch function from Dualwatch or tri-watch. (p. 11) The LCD backlight level can be adjusted from OFF, Min (dark), Mid and Max (bright).
!IC-M421-3.qxd 06.5.26 1:44 PM Page 47 (1,1) CONNECTIONS AND MAINTENANCE 8 ■ Supplied accessories ■ Antenna The following accessories are supplied: A key element in the performance of any communication system is an antenna. Ask your dealer about antenna and the best place to mount them. w q ■ Fuse replacement e r t o One fuse is installed in the supplied DC power cable.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 48 (1,1) New2001 8 CONNECTIONS AND MAINTENANCE ■ Connections e r 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 CAUTION: After connecting the DC power cable, GPS receiver jack and external speaker jack, cover the connector and jacks with an adhesive tape as shown below, to prevent water seeping into the transceiver.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 49 (1,1) New2001 CONNECTIONS AND MAINTENANCE 8 ■ Mounting the transceiver D Using the supplied mounting bracket EXAMPLE The universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting. • Mount the transceiver securely with the 2 supplied screws (5 × 20) to a surface which is more than 10 mm thick and can support more than 5 kg.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 50 (1,1) New2001 8 CONNECTIONS AND MAINTENANCE ■ Optional MB-69 installation An optional MB-69 FLUSH MOUNT is available for mounting the transceiver to a flat surface such as an instrument panel. e Attach the clamps on either side of the transceiver with 2 supplied bolts (5 × 8 mm). • Make sure that the clamps align parallel to the transceiver body. CAUTION: KEEP the transceiver and microphone at least 1 meter away from your vessel’s magnetic navigation compass.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 51 (1,1) TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION 9 REF. The transceiver does • Bad connection to the power supply. not turn ON. • Check the connection to the transceiver. p. 48 No sound from speaker. • Squelch level is too high. • Volume level is too low. • Speaker has been exposed to water. • Set squelch to the threshold point. • Set [VOL] to a suitable level. • Drain water from the speaker. p. 8 p.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 52 (1,1) New2001 10 CHANNEL LIST • International channels CH † Frequency (MHz) Transmit Receive 01 156.050 160.650 02 156.100 03 156.150 04 CH Frequency (MHz) Transmit Receive 11 156.550 156.550 160.700 12 156.600 160.750 13 156.650 156.200 160.800 14 05 156.250 160.850 06 156.300 156.300 CH Frequency (MHz) Transmit Receive 21 157.050 161.650 156.600 22 157.100 156.650 23 157.150 156.700 156.700 24 15*1 156.750 156.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 53 (1,1) New2001 CHANNEL LIST 10 • USA channels (for U.K. version only) Frequency (MHz) CH Transmit 01A 156.050 -- --- 03A 156.150 -- --- 05A 156.250 Receive CH Frequency (MHz) CH Frequency (MHz) Transmit Receive CH Frequency (MHz) Transmit Receive Transmit 156.600 156.600 22A 157.100 157.100 64A 156.225 23A 157.150 Receive 156.225 CH 77 Frequency (MHz) Transmit Receive 156.875 156.875 156.050 12 --- 13† 156.650 156.650 157.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 54 (1,1) New2001 11 SPECIFICATIONS AND OPTION ■ Specifications Specifications are measured in accordance with EN301 025. D Receiver D General • Receive system • Frequency coverage Transmit Receive • Mode : 156.000–161.450 MHz 156.000–163.425 MHz : FM (16K0G3E) DSC (16K0G2B) • Current drain (at 13.8 V) : TX high (25 W) 5.5 A Max. audio 1.5 A • Power supply requirement : 13.8 V DC (10.8 to 15.6 V) (negative ground) • Frequency stability : ±1.
06.5.26 1:44 PM Page 55 (1,1) TEMPLATE 12 164 149 78 61.6 R8 (Max.) 11 12 Cut here !IC-M421-3.
!IC-M421-3.qxd 06.5.
06.5.26 1:44 PM Page 57 (1,1) Dimensions 60.6 139.5 148 78 !IC-M421-3.qxd 164 28.3 111.2 14.
!IC-M421-3.qxd 06.5.26 1:44 PM Page 58 (1,1) New2001 < Intended Country of Use > GER AUT GBR IRL NOR A-6380D-1EU-e Printed in Japan © 2004–2006 Icom Inc.
