JRC JHS-770S/780D Marine VHF Radiotelephone Instruction Manual

About this manual

This document is the official instruction manual for the JRC JHS-770S/780D Marine VHF Radiotelephone. It covers safety warnings, first aid procedures for electrocution, and general handling precautions for the device and its power supply unit.

What's inside

• Caution Against High Voltage
• First Aid for Electrocution
• Handling Precautions
• Power Supply Safety
• Distress Alert Procedures
• Service and Maintenance

Frequently asked questions

Who should perform maintenance on this device?

Only specialists should attempt any maintenance, checking or adjusting of the internal parts.

What should be done if a distress alert is received?

Make sure to inform the ship's captain or officer in charge immediately.

Can users replace the DC fuses themselves?

No, qualified service personnel should replace the DC fuses to prevent fire or electrocution.