Given the marine environment, the rotary encoder fails. The manual provides the part number (e.g., EC11B series) and the disassembly order to replace it without damaging the LCD ribbon cable.
| Symptom | Probable Cause | Solution | | :--- | :--- | :--- | | No Power | Blown fuse, bad connection. | Check the fuse on the power cable. Check terminal voltage at the rear of the radio. | | Cannot Transmit | SWR too high, bad antenna. | Check antenna cable for cuts or water ingress. Test with a dummy load. | | Weak Reception | Antenna mismatch, SQL too high. | Check antenna connection. Adjust squelch. Check for corrosion on the rear connector. | | GPS Error | NMEA wiring reversed. | Verify NMEA IN+ and IN- wiring against the GPS plotter output. | | DSC Test Fail | MMSI not programmed. | Ensure a valid 9-digit MMSI is programmed. | samyung srg 1150 service manual.pdf
A bad antenna can burn out the transmitter. Given the marine environment, the rotary encoder fails
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