JRC JFE-380 User Manual (English)

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Questions and Answers:

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Christina HarringtonJul 31, 2025
Why is there so much noise on my JRC Marine Equipment?
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  Amber ByrdJul 31, 2025
  Excessive noise records can stem from several sources. It could be noise generated by the dynamo, in which case you should check the dynamo. Another cause could be an imperfect main unit earth, so check the main unit earth connection. Finally, it might be external interference noise, possibly from underwater sonic prospecting equipment from another ship, which isn't a malfunction of your equipment.
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Monica WaltersAug 6, 2025
What to do if the screen doesn't appear on my JRC Marine Equipment?
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  Michael WarrenAug 6, 2025
  If the screen does not appear, there are several potential causes. First, ensure the ship's AC100-230V breaker is "ON". If it is off, turn it "ON". Second, check for disconnections in the power supply AC inboard cable or loose screws in the connecting terminal; repair the cable or tighten the screws. Lastly, a blown fuse could be the issue; in this case, replace the fuses.
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Jeffrey SalazarAug 11, 2025
Why is my JRC Marine Equipment showing an incorrect depth value with false sea bottom records?
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  Joseph WigginsAug 11, 2025
  An incorrect depth value, showing a false sea bottom in a middle layer, typically indicates that the sensitivity setting is too strong. This causes the equipment to record garbage, dirt, and plankton layers in the water as the sea bottom. To resolve this, set the sensitivity to AUTO or manually lower the sensitivity.
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Anthony ConleyAug 15, 2025
What to do if my JRC Marine Equipment depth value is not displayed, but the sea bottom echo is slightly recorded?
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  Amanda GriffithAug 15, 2025
  If the depth value isn't showing but the sea bottom echo is slightly recorded, the sensitivity setting may be too weak. Try setting the sensitivity to AUTO or manually raise the sensitivity. Also, if the sea bottom is mud (weak stratum), set the sensitivity to AUTO or raise sensitivity. Another possible reason might be that oysters and barnacles adhere to the transducer, so remove them at dry-dock. Finally, check the transducer cable for disconnections or loose screws in the connecting terminal, and tighten the screw in the connecting terminal.
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Rebecca Wilson MDAug 20, 2025
How to fix a JRC Marine Equipment that only displays the oscillation line and no depth value?
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  ashleyhenryAug 20, 2025
  If your equipment only shows the oscillation line, it could be due to the actual sea bottom being deeper than the set range. To fix this, set the range setting to AUTO or manually adjust the range. Another potential cause is a disconnected transducer cable, which would require cable repair.
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Debra ChavezAug 26, 2025
How to correct the depth value on JRC Marine Equipment?
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  traceypatelAug 26, 2025
  If the depth value is incorrect, it may be due to an incorrect draft adjustment setting. Set a correct value to resolve this issue.