Maintenance, Weekly Checks, Aural testing | Furuno FS-1503 guide

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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Furuno FS-1503 manual Maintenance, Weekly Checks, Aural testing, Testing the transmitter with a dummy antenna

Contents

Page Page Safety Instructions Table of Contents Introduction Features Operation System Configuration Keys Transceiver Unit DescriptionRotary controls ALM Indications Adjusting the Backlighting Turning the Power On/OffTurning the Loudspeaker On/Off Turning the Squelch On/Off Turning AGC on/off Selecting Frequency Rx frequency Direct frequency entryTx frequency Paired Rx/Tx frequency J3E User channels Sample displays of ITU telephony channel ITU telephony channels SSB TLX ITU Telex channels Transmitting Tuning the antennaDisplaying Station Name Monitoring transceiver output power Using the microphoneReducing transmitter power Distress Call on 2182 kHz Distress calls and Distress message Distress frequencies Clarifier adjustment Adjusting RF gainReceiving Meter Noise blanker NB Receiving AM broadcasting stationsSquelch control User channels Frequency ScanChannel scan 12 Sample scan screen ITU channels Frequency Sweep MIF commands applicable to the FS-1503 MIF Commands Furuno Nbdp Terminal DP-5/DP-6 Operation of Optional EquipmentTelex Communication Intercom Remote Station RB-500 requires optional Remote-B BoardPriority Communication on 2182 kHz Customizing by User Changing System SettingsSystem Setup Scan/sweep-stop signal level Writing User Channels Aural testing MaintenanceTesting the transmitter with a dummy antenna Weekly Checks Sequence of diagnostic test Diagnostic Test Key and corresponding indication LCD/Keyboard Test & ROM Version No. Confirmation Maintenance Maintenance Maintenance con’t Troubleshooting List Troubleshooting Troubleshooting list con’t Replacing Fuses Errow Indication General Specifications Antenna Coupler Custom CHANNELS/FREQUENCIES Appendix MF band working carrier frequencies ref. US CFR 47 Part CH no MF band SSB working carrier frequencies ITU CH no MHz ITU SSB carrier frequencies ITU RR Appendix Following 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 Channels ITU RR Appendix MHz Band ITU Nbdp Telex Frequency Table 8001 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 Table 22001 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table Index