Furuno FS-1503 manual Maintenance, Weekly Checks, Aural testing

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4. MAINTENANCE

WARNING

Do not open the equipment.

Improper handling can result in electrical shock. Only qualified personnel should work inside the equipment.

Do not disassemble or modify the equipment.

Fire, electrical shock or serious injury can result.

4.1 Weekly Checks

Check the radiotelephone at appropriate intervals as required by Administration.

Aural testing

1.Press the [ALM] key to generate the alarm. Confirm that the two-tone alarm is released for more than 30 seconds. You will hear the audio from the loudspeaker. This process helps to verify that the radiotelephone alarm generator is in the working condition without transmit- ting an actual radio signal.

2.To terminate test, press the [ALM] key again or [ENT] (STOP) key.

Testing the transmitter with a dummy antenna

This requires the optional dummy load (in the antenna coupler).

1.While pressing and holding down the [ALM] key, press the [INT/0] key. The dummy an- tenna in the antenna coupler is connected to the FS-1503 instead of the antenna. “DUMMY” appears and the test signal at test frequency (for example, 2191 kHz), modulated by two tones (1300 Hz and 2200 Hz), is generated across the dummy load for 45 seconds.

2.To stop the emission, press the [ALM] key. The dummy load is disconnected and the trans- ceiver restores the previous frequency setting.

4-1

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Contents Page Page Safety Instructions Table of Contents Introduction FeaturesOperation System ConfigurationKeys Transceiver Unit DescriptionRotary controls ALM IndicationsAdjusting the Backlighting Turning the Power On/OffTurning the Loudspeaker On/Off Turning the Squelch On/OffTurning AGC on/off Selecting FrequencyRx frequency Direct frequency entryTx frequency Paired Rx/Tx frequencyJ3E User channelsSample displays of ITU telephony channel ITU telephony channels SSBTLX ITU Telex channelsTransmitting Tuning the antennaDisplaying Station Name Monitoring transceiver output power Using the microphoneReducing transmitter power Distress Call on 2182 kHzDistress calls and Distress message Distress frequenciesClarifier adjustment Adjusting RF gainReceiving MeterNoise blanker NB Receiving AM broadcasting stationsSquelch control User channels Frequency ScanChannel scan 12 Sample scan screen ITU channelsFrequency Sweep MIF commands applicable to the FS-1503 MIF CommandsFuruno Nbdp Terminal DP-5/DP-6 Operation of Optional EquipmentTelex Communication Intercom Remote Station RB-500 requires optional Remote-B BoardPriority Communication on 2182 kHzCustomizing by User Changing System SettingsSystem Setup Scan/sweep-stop signal level Writing User Channels Aural testing MaintenanceTesting the transmitter with a dummy antenna Weekly ChecksSequence of diagnostic test Diagnostic TestKey and corresponding indication LCD/Keyboard Test & ROM Version No. ConfirmationMaintenance MaintenanceMaintenance con’t Troubleshooting List TroubleshootingTroubleshooting list con’t Replacing Fuses Errow IndicationGeneral SpecificationsAntenna Coupler Custom CHANNELS/FREQUENCIES AppendixMF band working carrier frequencies ref. US CFR 47 Part CH no MF band SSB working carrier frequenciesITU CH no MHz ITU SSB carrier frequencies ITU RR AppendixFollowing frequencies are factory programmed 12/16 MHz ITU SSB carrier frequencies ITU RR Appendix CH no Ship RX Ship TX MF Band Telex Frequency Table Telex ChannelsITU RR Appendix MHz Band ITU Nbdp Telex Frequency Table8001 12001 12/16 MHz Band ITU Nbdp Telex Frequency Table 16111 CH NO. Ship RX Ship TX 18/19 MHz Band ITU Nbdp Telex Frequency Table22001 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table Index

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