IC-M31.qxd 03.10.
IC-M31.qxd 03.10.20 9:18 AM Page i (1,1) New2001 IN CASE OF EMERGENCY RECOMMENDATION If your vessel requires assistance, contact other vessels and the Coast Guard by sending a distress call on Channel 16. CLEAN THE TRANSCEIVER THOROUGHLY WITH FRESH WATER after exposure to saltwater, and dry it before operation. Otherwise, the transceiver’s keys, switches and controllers may become inoperable due to salt crystallization. ❍ USING CHANNEL 16 DISTRESS CALL PROCEDURE 1. “MAYDAY MAYDAY MAYDAY.” 2.
IC-M31.qxd 03.10.20 9:18 AM Page ii (1,1) New2001 FOREWORD FEATURES Thank you for purchasing this Icom product. The IC-M31 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 trouble-free operation. ☞ Waterproof construction Built tough to withstand the punishing marine environment, the IC-M31 meets JIS waterproof specification grade 7 while using BP-223 (option) or BP-224.
IC-M31.qxd 03.10.20 9:18 AM Page iii (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. BE CAREFUL! The transceiver’s right-side panel will become hot when operating continuously for long periods. antenna is very close to, or touching exposed parts of the body, especially the face or eyes, while transmitting.
IC-M31.qxd 03.10.20 9:18 AM Page iv (1,1) New2001 TABLE OF CONTENTS IN CASE OF EMERGENCY ................................................ i RECOMMENDATION ........................................................... i FOREWORD ....................................................................... ii IMPORTANT ........................................................................ ii EXPLICIT DEFINITIONS ..................................................... ii FEATURES ..................................
IC-M31.qxd 03.10.20 9:18 AM Page 1 (1,1) New2001 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. (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.
IC-M31.qxd 03.10.20 9:18 AM Page 2 (1,1) SUPPLIED ACCESSORIES AND ATTACHMENTS ■ Supplied accessories The following accessories are supplied: Qty. • Flexible antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 • Handstrap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 • Belt clip (MB-68) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 • Ni-Cd battery pack (BP-224) . . . . . . . . . . . . . . . . . . . . . . 1 • Battery charger (BC-150) .
03.10.20 9:18 AM Page 3 (1,1) New2001 2 SUPPLIED ACCESSORIES AND ATTACHMENTS ï Battery pack To remove the battery pack: Turn the screw counterclockwise, then pull the battery pack in the direction of the arrow as shown below. NOTE: When removing or attaching the battery pack, use a coin or flat-blade screwdriver to loosen or tighten the bottom screw. To attach the battery pack: Insert the battery pack in the IC-M31 completely, then turn the screw clockwise.
IC-M31.qxd 03.10.20 9:18 AM Page 4 (1,1) PANEL DESCRIPTION 3 ■ Front, top and side panels q w q POWER SWITCH [PWR] Push and hold to turn power ON and OFF. 2 3 w ANTENNA CONNECTOR (p. 2) Connects the supplied antenna. !0 Speaker Microphone Function display (p. 5) o i u e r t y e SCAN/DUAL KEY [SCN•DUAL] • Starts and stops normal or priority scan. (p. 14) • Enters watch mode when pushed for 1 sec. (p. 15) • Exits watch mode when pushed during watch operation. (p.
IC-M31.qxd 03.10.20 9:18 AM Page 5 (1,1) New2001 3 PANEL DESCRIPTION ■ Front, top and side panels (Continued) Y]/[Z Z]•[TAG] u CHANNEL UP/DOWN KEYS [Y • Selects an operating channel. (pgs. 7, 8) • Selects the SET mode condition of the item. (p. 16) • Checks tag channels or changes scanning direction during scan. (p. 14) • Sets or clears the displayed channel as a tag (scanned) channel when pushed both keys for 1 sec. (p.
IC-M31.qxd 03.10.20 9:18 AM Page 6 (1,1) New2001 PANEL DESCRIPTION t LOCK INDICATOR (p. 12) Appears while the lock function is activated. !1 SQUELCH LEVEL INDICATOR Shows the squelch level. y BATTERY INDICATOR Indicates remaining battery power. !2 VOLUME LEVEL INDICATOR Shows the volume level. Full Middle Charging required 3 !3 VOLUME LEVEL ADJUSTING INDICATOR Blinks while adjusting the volume level. Indication Battery level 3 No battery blinks when the battery over charged.
IC-M31.qxd 03.10.20 9:18 AM Page 7 (1,1) New2001 New2001 4 BASIC OPERATION ■ Channel selection IMPORTANT!: Prior to using the transceiver for the first time, the battery pack must be fully charged for optimum life and operation. To avoid damage to the transceiver, turn the power OFF while charging. D Channel 16 Channel 16 (Distress channel) is used for establishing initial contact with another station and for emergency communications.
IC-M31.qxd 03.10.20 9:18 AM Page 8 (1,1) New2001 BASIC OPERATION 4 D International, U.S.A.*1 and ATIS*2 channels There are 57 (58)*1 International, 58 U.S.A.*1 and 57 ATIS*2 channels. These channel groups may be specified for the operating area. 4 q Push [DIAL] to select a regular channel. w Push [Y]/[Z] to select a channel. • “DUP” appears for duplex channels. e To change the channel group, push [DIAL] for 1 sec. • International, U.S.A.*1 and ATIS*2 channels can be selected in sequence.
IC-M31.qxd 03.10.20 9:18 AM Page 9 (1,1) New2001 4 BASIC OPERATION ■ Adjusting the volume level ■ Adjusting the squelch level The volume level can be adjusted with [+]/[–]. The IC-M31 has a squelch level adjustment, even though there is no control knob for it. In order to receive signals properly, as well as for the scan to function effectively, the squelch must be adjusted to the proper level. q Push [SQL•MONI], then adjust the squelch level with [+]/[–].
IC-M31.qxd 03.10.20 9:18 AM Page 10 (1,1) New2001 BASIC OPERATION 4 ■ Receiving and transmitting CAUTION: Transmitting without an antenna may damage the transceiver. q Push and hold [PWR] to turn power ON. w Set the volume and squelch levels. ➥ Push [SQL•MONI], and push [–] to open the squelch. ➥ Push [SQL•MONI] to stop “SQL” indicator blinking, then push [+]/[–] to set the volume level. ➥ Push [SQL•MONI], and push [+]/[–] to set the squelch level. e Push [Y]/[Z] to select the desired channel.
IC-M31.qxd 03.10.20 9:18 AM Page 11 (1,1) New2001 4 BASIC OPERATION ■ Call channel programming The call channel key is used to select the default channel, however, you can program your most often-used channel in each channel group for quick recall. q Push [DIAL] for 1 sec. several times to select the desired channel group (INT, USA, ATIS) to be programmed. w Push [16•C] for 1 sec. to select the call channel. • “CALL” and call channel number appear. e Push [16•C] again for 3 sec.
IC-M31.qxd 03.10.20 9:18 AM Page 12 (1,1) New2001 BASIC OPERATION 4 ■ Lock function ■ Monitor function This function electronically locks all keys (except for [+]/[–], [PTT], [SQL•MONI] and [H/L•LOCK]) to prevent accidental channel changes and function access. The monitor function releases the noise squelch mute. See p. 18 for details of the monitor switch action. ➥ Push [H/L•LOCK] for 1 sec. to turn the lock function ON and OFF. ➥ Push [SQL•MONI] for 1 sec. to activate the monitor function.
IC-M31.qxd 03.10.20 9:18 AM Page 13 (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. In addition, an auto scan function is available for standby convenience. PRIORITY SCAN CH 02 CH 16 CH 05 CH 01 CH 03 CH 04 Priority scan searches through all tag channels in sequence while monitoring Channel 16.
IC-M31.qxd 03.10.20 9:18 AM Page 14 (1,1) New2001 SCAN OPERATION 5 ■ Setting tag channels ■ Starting a scan For more efficient scanning, add desired channels as tag channels or clear the tag for unwanted channels. Non-tag channels will be skipped during scanning. Tag channels can be assigned to each channel group (INT, USA, ATIS) independently. (Depending on version) Set the priority scan function, scan resume timer and auto scan function in advance, using SET mode. (pgs.
IC-M31.qxd 03.10.20 9:18 AM Page 15 (1,1) New2001 New2001 6 DUALWATCH/TRI-WATCH ■ 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 the desired operating channel. w Push [SCN•DUAL] for 1 sec. to start dualwatch or tri-watch (depending on SET mode setting).
IC-M31.qxd 03.10.20 9:18 AM Page 16 (1,1) New2001 SET MODE 7 ■ SET mode programming D SET mode operation SET mode is used to change the condition of 11 transceiver functions: beep tone function, priority scan function, scan resume timer, auto scan function, dual/tri-watch function, monitor switch action, automatic backlighting, LCD contrast selection, power save function, self check function and battery voltage indicator. q Turn power OFF. w While pushing [SQL•MONI], turn power ON to enter SET mode.
IC-M31.qxd 03.10.20 9:18 AM Page 17 (1,1) New2001 7 SET MODE ■ SET mode items D Beep tone function “bP” D Priority scan function “Pr” You can select silent operation by turning the beep tones OFF, or you can have 2 types of confirmation beeps sound at the push of a switch. When ON is selected, a fixed beep (Pi) sounds, and when US is selected, the preset beeps (e.g. do, re, mi) sound. The transceiver has 2 scan types—normal (OFF) and priority (ON) scans.
IC-M31.qxd 03.10.20 9:18 AM Page 18 (1,1) New2001 SET MODE 7 D Auto scan function “AS” D Monitor switch action “Sq” The auto scan function starts the desired scan automatically when no signal is received, and no operation is performed for 30 sec. The monitor switch action cuts off the squelch function temporarily. This switch action contains PUSH (Pu) or HOLD (Ho) settings as shown below. Push • Pu (PUSH): After pushing the [SQL•MONI] for 1 sec., the squelch opens and emits audio.
IC-M31.qxd 03.10.20 9:18 AM Page 19 (1,1) New2001 7 SET MODE D LCD contrast selection “LC” D Self check function “SC” The contrast of the LCD can be turned ON (high contrast) and OFF (low contrast). The self check function checks transceiver conditions by itself, and informs you in case a problem is found. The following items are checked after the power is turned ON, then it switches to operation mode. • Temperature : Outside of –25°C to +65°C (approx.
IC-M31.qxd 03.10.20 9:18 AM Page 20 (1,1) New2001 SET MODE D Battery voltage indicator “bt” SET MODE LIST The voltage of the connected battery pack can be turned ON (displayed for 2 sec.) or OFF (non-displayed) after power is turned ON.
IC-M31.qxd 03.10.20 9:18 AM Page 21 (1,1) New2001 8 BATTERY CHARGING ■ Battery charging ■ Battery cautions Prior to using the transceiver for the first time, the battery pack must be fully charged for optimum life and operation. CAUTION! NEVER CAUTION: To avoid damage to the transceiver, turn the power OFF while charging. • Recommended temperature range for charging: +10°C to +40°C • Use the specified chargers (BC-150, BC-119N and BC121N). NEVER use another manufacture’s charger.
IC-M31.qxd 03.10.20 9:18 AM Page 22 (1,1) New2001 BATTERY CHARGING ï Charging connections 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. 8 ■ Optional battery case When using a battery case attached to the transceiver, install 6 × AA(R6) size alkaline batteries as illustrated below. *Not supplied with some version. e Insert the battery pack with/without the transceiver into the charger.
IC-M31.qxd 03.10.20 9:18 AM Page 23 (1,1) New2001 8 BATTERY CHARGING ■ Optional battery chargers ï AD-103 installation q Install the AD-103 desktop charger adapter into the holder space of the BC-119N/121N. Screws supplied with the charger adapter Desktop charger adapter Connector Not used Plug 23 w Connect the plugs of the BC-119N/121N to the AD-103 desktop charger adapter with the connector, then install the adapter into the charger with the supplied screws.
IC-M31.qxd 03.10.20 9:18 AM Page 24 (1,1) New2001 BATTERY CHARGING 8 ï Rapid charging with the BC-119N+AD-103 ï Rapid charging with the BC-121N+AD-103 The optional BC-119N provides rapid charging of battery packs. The following are additionally required. • AD-103 charger adapter • An AC adapter (not supplied with BC-119N depending on version) or the DC cable (OPC-515L/CP-17L) The optional BC-121N allows up to 6 battery packs to be charged simultaneously. The following are additionally required.
IC-M31.qxd 03.10.20 9:18 AM Page 25 (1,1) New2001 9 OPTIONAL SWIVEL BELT CLIP ■ MB-87 contents Qty. q Belt clip ……………………………………………………… 1 w Base clip …………………………………………………… 1 q w ■ To attach q Slide the base clip into the plastic loop on the back of the transceiver as illustrated below. 25 w Clip the belt clip to a part of your belt and insert the transceiver into the belt clip until the base clip fitting into the groove. e Once the transceiver is locked in place, it swivels as illustrated below.
IC-M31.qxd 03.10.20 9:18 AM Page 26 (1,1) New2001 OPTIONAL SWIVEL BELT CLIP 9 ■ To detach ➥ Turn the transceiver upside down in the direction of the arrow and pull out from the belt clip. 9 R CAUTION! HOLD THE TRANSCEIVER TIGHTLY, WHEN HANGING OR DETACHING THE TRANSCEIVER FROM THE BELT CLIP. Otherwise the transceiver may not be attached to the belt clip or swivelled properly if the transceiver is accidentally dropped and the base clip is scratched or damaged.
IC-M31.qxd 03.10.20 9:18 AM Page 27 (1,1) New2001 New2001 10 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION • Recharge the battery pack. • Check the connection to the transceiver. p. 21 p. 3 No sound from speaker. • Squelch level is too deep. • Volume level is too low. • Speaker has been exposed to water. • Set squelch to the threshold point. • Push [+]/[–] to set a suitable level. • Drain water from the speaker. p. 9 p.
IC-M31.qxd 03.10.20 9:18 AM Page 28 (1,1) New2001 CHANNEL LIST 11 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 07 156.350 08 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 15 156.
IC-M31.qxd 03.10.20 9:18 AM Page 29 (1,1) New2001 New2001 12 SPECIFICATIONS AND OPTIONS ■ Specifications ■ Options GENERAL • BP-223 BATTERY CASE Battery case for 6 × AA (R6) alkaline cells. • BP-224 Ni-Cd BATTERY PACK 7.2 V/750 mAh Ni-Cd battery pack. • BC-119N DESKTOP CHARGER + AD-103 CHARGER ADAPTER + BC-145 AC ADAPTER For rapid charging of battery packs. An AC adapter is supplied with the charger depending on versions. Charging time: approx. 1.
IC-M31.qxd 03.10.20 9:18 AM Page 30 (1,1) New2001 DOC 13 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-M31.qxd 03.10.20 9:18 AM Page 31 (1,1) New2001 < Intended Country of Use > GER AUT GBR IRL NOR A-6298D-1EU Printed in Japan © 2003 Icom Inc.
