^NGJA
JHS-770S
Description
JRC JHS-770S — MF/HF GMDSS radio station with integrated DSC and NBDP for complete SOLAS Sea Area A3/A4 compliance.
Specifications
| Type | MF/HF GMDSS Station |
| Compliance | SOLAS |
Engineering Knowledge
General engineering guidance only — it may contain errors. Always follow the equipment's own documentation and the judgement of a qualified engineer.
Controller or data terminal screen is blank or not displaying anything.
Check the controller or data terminal cable, verify the power supply voltage, and inspect the power switch, display circuit, or control circuit for malfunctions.
In TEL mode, TX and TXON are displayed, but no voice is transmitted.
Check the handset, the controller cable, and the AF signal transmission circuit for malfunctions.
TX is displayed, but TXON is not, and transmission is not possible.
Inspect the transmission circuit for malfunctions.
TX and TXON are displayed, but transmission is not possible.
Check the handset PTT switch (TEL mode), the electrical key connection (CW mode), and the transmission circuit for malfunctions.
Reception sensitivity is poor.
Inspect the antenna for damage, check for breaks or short circuits in the antenna cable, and examine the antenna connectors and receiver circuit for malfunctions.
Little or no sound is heard from the speaker, including static and voices.
Check the speaker and the receiver circuit for malfunctions.
Radio static (noise) is output from the speaker, but transmissions from other stations cannot be received.
Inspect the antenna for damage, check for breaks or short circuits in the antenna cable, and examine the antenna connectors and receiver for malfunctions.
VOL control, dimmer, and PWR key on the controller can be operated, but radiotelephone functions like RF GAIN control cannot be used.
Multiple controllers may be connected, and another controller has access rights. Press ENT to obtain access rights, then retry the operation.
No response is received from another station via radiotelephone or DSC call.
The other station may not have an operator or may be unavailable due to other duties. Wait and retry later.
Received distress call log has been erased without operation.
This is not a malfunction. Distress call logs are automatically deleted after 48 hours or when the equipment is turned off by the power supply breaker. Print and save received messages if necessary.
Competitive Models
SAILOR 6310 MF/HF DSC — dedicated DSC controller for MF/HF distress and safety calling under GMDSS requirements.
SAILOR 6300 MF/HF — SSB radio transceiver for GMDSS Sea Areas A3/A4, providing DSC, voice, and NBDP communication.
Furuno RC-1800F/1800T integrated GMDSS radio console — MF/HF SSB/DSC, VHF and associated equipment for GMDSS sea areas.
Send enquiry
Send an enquiry to the manufacturer of ^NGJA JHS-770S. One broadcast per day.
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Code map
^N G J A │ │ │ └── Model: JHS-770S │ │ └───── Make: JRC │ └──────── Equipment: GMDSS └─────────── System: Navigation