CV-620 Blows Fuse

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Anonymous

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Hello,

Our CV-620 blows the 2A in-line fuse as soon as the fuse is replaced. I have removed the plug from the CV-620 and it continues to blow fuses as soon as the power is applied.

My suspicion therefore that the plug is shorted. Does this make sense ? Just checking before trying to ship a replacement part to the Marshall Islands

No other oddities on that circuit and the circuit breaker for the fishfinder and the N2K network has had no problems.

Thanks,

Max
SV-Fluenta.blogspot.com
 
Fluenta,
The power/data cable for the FCV-620 has two in-line fuses, one in the negative (black) and the positive (red) lead. Just to confirm, without the 10-pin plug to the sounder it is blowing one or both fuses? Also are there of the data wires (yellow, green, blue or white) connected?

Snips
 
Thanks for the quick reply. Odd that I only have a fuse on the positive side. I have good access to the wiring run and there is no fuse on the negative side (the contractor that installed it in Seattle for the previous owner just ran most of the cable in the open under the dodger - not a great install job). Yes, there are the NMEA0183 wires also there but not hooked up as there is no other data going to the device.

Yes, it is the 10 pin pug (not the transducer one) and yes it blows the positive fuse even with the plug off the device.

Looking forward to having the device working again a we use it to help get through the uncharted or poorly charted atolls we are visiting.

We will be in the Marshall Is in a week so can resupply if we need parts.

Much thanks,

Max
SV-Fluenta.blogspot.com
 
Fluenta,
It sounds like the input power cable is bad. Strange is that the normal cable has a fuse on the black power lead. Not that this will make any difference but sometimes there is another wire that appears black but actually it is heat shrink that is over the shield wire. But still with the power plug disconnected you shouldn't be blowing a fuse. Did the plug get wet at all?

Snips
 
Yes, there is a 'black' that is the negative and a block that is the shield wire.

The fishfinder is mounted on the companionway. At sea the center of the dodger is normally closed but in this hot weather (we just crossed the equator back to the northern hemisphere) it has been open more often. I did not see corrosion in the plug when I looked but perhaps it is shorted in the plug.

I see in the wiring diagram that there are numbers for each wire on the plug. How do those numbers correspond to the plug itself so I can check continuity ? Sorry if this is silly simple question but I am a simple mechanical engineer....

Thank you so much for the prompt replies. I wish Furuno's competitors had a similar system for the other half of my electronics that are not Furuno.

Cheers,

Max
SV-Fluenta.blogspot.com
 
Fluenta,
Hopefully this will help.

Snips
 

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