Furuno FS-1503 manual Troubleshooting List

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5. TROUBLESHOOTING

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.

5.1 Troubleshooting List

The troubleshooting list below gives common symptoms of equipment malfunction and means to restore normal operation. If you cannot restore normal operation, please do not check inside any unit. Any repair is best left to a qualified radiotelephone technician. Improper handling or adjustment may cause more serious damage.

Table 5-1 Troubleshooting list

Trouble		Probable Cause	Remedy

Power cannot be turned	The mains switchboard may be		Turn on the mains switch.
on.	off.
	DC overvoltage input.		Check supply voltage. It should
			be less than 15 V.
	The battery may have		Recharge battery and tighten
	discharged, or poor contact at		terminal connections.
	terminals.

Frequency readout appears	The [	/9] key may be off.	Operate the [	/9] key.
but no lamps light.

Power is on but no sound	The [	/4] key is off.	Press the [	/4] key.
from loudspeaker.	Volume may be too low.		Adjust the [VOLUME] control.
	Volume may be too low.		Adjust the [VOLUME] control.
	Squelch is on.		Press the [SQL/5] key if "SQ"
			appears on the display.
	Reduced RF Gain.		Turn the [RF GAIN] control
			clockwise.

(Continued on next page)

5-1

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Contents Page Page Safety Instructions Table of Contents Features IntroductionSystem Configuration OperationRotary controls Transceiver Unit DescriptionKeys Indications ALMTurning the Loudspeaker On/Off Turning the Power On/OffAdjusting the Backlighting Turning the Squelch On/OffSelecting Frequency Turning AGC on/offTx frequency Direct frequency entryRx frequency Paired Rx/Tx frequencyUser channels J3EITU telephony channels SSB Sample displays of ITU telephony channelITU Telex channels TLXDisplaying Station Name Tuning the antennaTransmitting Reducing transmitter power Using the microphoneMonitoring transceiver output power Distress Call on 2182 kHzDistress frequencies Distress calls and Distress messageReceiving Adjusting RF gainClarifier adjustment MeterSquelch control Receiving AM broadcasting stationsNoise blanker NB Channel scan Frequency ScanUser channels ITU channels 12 Sample scan screenFrequency Sweep MIF Commands MIF commands applicable to the FS-1503Telex Communication Operation of Optional EquipmentFuruno Nbdp Terminal DP-5/DP-6 Priority Remote Station RB-500 requires optional Remote-B BoardIntercom Communication on 2182 kHzSystem Setup Changing System SettingsCustomizing by User Scan/sweep-stop signal level Writing User Channels Testing the transmitter with a dummy antenna MaintenanceAural testing Weekly ChecksDiagnostic Test Sequence of diagnostic testLCD/Keyboard Test & ROM Version No. Confirmation Key and corresponding indicationMaintenance MaintenanceMaintenance con’t Troubleshooting Troubleshooting ListTroubleshooting list con’t Errow Indication Replacing FusesSpecifications GeneralAntenna Coupler Appendix Custom CHANNELS/FREQUENCIESMF band working carrier frequencies ref. US CFR 47 Part MF band SSB working carrier frequencies CH noMHz ITU SSB carrier frequencies ITU RR Appendix ITU CH noFollowing frequencies are factory programmed 12/16 MHz ITU SSB carrier frequencies ITU RR Appendix CH no Ship RX Ship TX Telex Channels MF Band Telex Frequency TableMHz Band ITU Nbdp Telex Frequency Table ITU RR Appendix8001 12001 12/16 MHz Band ITU Nbdp Telex Frequency Table 16111 18/19 MHz Band ITU Nbdp Telex Frequency Table CH NO. Ship RX Ship TX22001 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table Index

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