User manual FURUNO MF-220 OPERATORS MANUAL

[. . . ] Do not place liquid-filled containers on the top of the equipment. Fire or electrical shock can result if a liquid spills into the equipment. Immediately turn off the power at the switchboard if the equipment is emitting smoke or fire. Continued use of the equipment can cause fatal damage to the equipment. [. . . ] Use a stereo plug when connecting a 4 ohm speaker to the external speaker plug. Connect it as shown in the illustration below. Do not use for battery use for ship's earth only Stereo plug 2. Do not connect any of the output connectors on the rear panel to the ship's ground. SP outputs are floating and must not be connected to either battery or the rear panel. OPERATION 2. 3 Adjusting Key Backlighting You may adjust the intensity of the key backlighting cyclically with the [DIM] key, in five levels, including off. 2. 4 Adjusting Output Level Turn the [HAIL VOL] control to adjust the output volume from the horn speakers or intercom speakers. Clockwise rotation increases volume; counterclockwise rotation decreases it. 2. 5 Adjusting Listening Volume Turn the [LISTEN VOL] control to adjust the listening volume from the Loud Hailer's internal speaker and external speaker (if connected). 2. 6 Calling All Intercom Stations 1. In the standby mode, hold the microphone 2-3 cm from your mouth and press the PTT switch on the microphone. All intercom stations and both horn speakers will hear you. After speaking, release the PTT switch to return the equipment to the standby mode. Note: To call all intercom stations while sounding warning signals, see page 17. 11 2. OPERATION 2. 7 Calling a Specific Intercom Station 1. Adjust listening volume with the [LISTEN VOL] control if necessary. To call another station, select the next station with the [Intercom Select] key. After you have finished all conversations, press the [Hail Select] key to return to the standby mode. Intercom station operation Press the button on the intercom to call. Release the button to listen. 2. 9 Hailing by Voice 1. Press the [Hail Select] key until the indicator lights for the desired horn speaker(s). Press the PTT switch on the microphone and speak into the microphone. If necessary, adjust the output power to the speaker(s) with the [HAIL VOL] control. Release the PTT switch and the Loud Hailer will switch to the listening mode, using the speaker(s) as microphone(s). If necessary, adjust listening volume with the [LISTEN VOL] control. After speaking, press the [Hail Select] key to return to the standby mode. 13 2. OPERATION 2. 10 Sounding Warning Signals Your Loud Hailer has eight different warning signals: two manual and six automatic. [. . . ] The BOTH indicator lights every four seconds during the sounding of the alarm or the five-minute rest period. Disabling the alarm mode Press any key or switch other than the [AUX] or [DIM] key, or turn off the power. 19 2. OPERATION Enable alarm ALL, FWD, AFT and BOTH indicators light. YELP indicator goes off. Press the [Lower Signal Select] key to flash the YELP indicator. After 5 minutes ALL, FWD, AFT and BOTH indicators go off. BOTH indicator lights every four seconds. Press the [FUNC] key. STANDBY STATUS (Alarm mode enabled) An attempt is made to remove the Loud Hailer with alarm mode active Alarm sound is released through both horn speakers at maximum volume. [. . . ]