Furuno FS-1562-15, FS-1562-25 manual Antenna Coupler Test, Competent technicians only

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4.4 Antenna Coupler Test

The CPU and the relays which select capacitors and coils for tuning can be checked. For

Competent technicians only

DANGER

HIGH VOLTAGE

Still alive at OFF

Discharge before

servicing

Procedure

DANGER - Electrical Shock Hazard

1.Open the antenna coupler cover.

2.Open the shield cover inside the coupler.

3.Turn on No. 2 of the DIP switch S2.

4.Press the TUNE switch in the antenna coupler.

5.24 LEDs (CR1 to CR24) light one by one every second. The relays trip on with the corresponding LEDs.

CR1 ON - K1 ON CR2 ON - K2 ON

.

.

.

CR22 ON - K22 ON (CR23 not provided) CR24 ON - K24, K25 ON

6.Turn off No. 2 of the DIP switch S2.

7.Close the cover.

If a CPU error is detected, CR1 lights for ROM error, CR2 for RAM error, CR3 for A/D converter error. (ROM/RAM/AD Converter is incorporated in the CPU.)

COUPLER BOARD

LED

DIP switch S2

behind the shield case

TUNE SWITCH

-4.4-

Image 34

Contents Page T 9 9 Safety Instructions Do not disassemble or modify the equipment List of Contents Features IntroductionSpecifications of MF/HF Radiotelephone model FS-1562 GeneralReceiver Operation Rotary controls Front View of Transceiver UnitKeys Page AC and DC power switches Power Supply UnitFuses Starting operation Selecting FrequencyTX Freq Standard type Netherlands type Special type YESDirect frequency entry J3ECustom channels ITU telephony channels SSBITU Telex channels Monitoring transceiver output power Tuning the antennaUsing the handset TransmittingReducing transmitter power Distress Call on 2182 kHzDistress frequencies Distress calls and Distress messageEvent of Antenna Coupler Failure DSC Distress CallingReceiving Noise blanker NB Frequency ScanSquelch control Channel scanFrequency Sweep ITU channelsOptional Devices Telex CommunicationIntercom Remote StationSetting Page Page This page is intentionally left blank Testing the transmitter with a dummy antenna Diagnostic TestWeekly Checks Page LCD/Keyboard Test & ROM Version No. Confirmation Antenna Coupler Test Competent technicians onlyMaintenance Page Troubleshooting Troubleshooting List For qualified personnel onlyTrouble Probable Cause Remedy Error Indication Replacing FusesThis page is intentionally left blank Appendix MF band working carrier frequencies ref. US CFR 47 Part MF band SSB working carrier frequencies CH noMHz ITU SSB carrier frequencies ITU RR Appendix Following frequencies are factory programmedAP.5 12/16 MHz ITU SSB carrier frequencies ITU RR Appendix AP.7 Telex Channels MF Band Telex Frequency TableMHz Band ITU Nbdp Telex Frequency Table ITU RR AppendixAP.10 AP.11 12/16 MHz Band ITU Nbdp Telex Frequency Table AP.13 18/19 MHz Band ITU Nbdp Telex Frequency Table AP.15 22, 25/26 MHz Band ITU Nbdp Telex Frequency Table