Tip & How-To about Lowrance LCX-19C GPS Receiver

Lowrance LCX power up problem

On Lowrance LCX-19 and I would assume other LCX series units.
The T3 Transformer shorts out and when the sonar kicks in it causes the unit to go over current and will eather cause the unit to reset and start again or blow the fuse. If you have the ability you can re-wind the transformer.

The primary is 46 turns of 24awg inverter duty magnet wire,
The secondary is 164 turns of 26awg inverter duty magnet wire.

Be sure to keep the same winding direction as what you take off as it may be phase sensitive. Be sure to use mylar tape between the primary and secondary windings.

Just a note this board has very heavy power planes and is very hard to solder/de-solder on.

If you have any questions or need help you can contact me at info@jtechnicalservices.com

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1 Answer

i have a lcx 110 lowrance graph that wont power up at all. i replaced all the wiring to the unit and tested the plug at the unit all of that is good i also cleaned the connections still nothing. any ideas?


I have found several units that have the same problem. All turned out to be a defective keypad. And almost all are specifically the power button. Not something Lowrance will repair. I've been purchasing some of these units for parts. If you still have it I might be interested. jadamec@yahoo.com

Aug 23, 2011 | Lowrance LMS 332c Mapping Sonar/GPS...

1 Answer

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Hey Tingo,
I have two 113's,, the problem sounds like the transducer is going bad,, Try this.. unplug all your connections,, replug them and see if it helps...

Don't get me started on $$$ updates....

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I've had several similar units, and used them with Navionics HotMaps Premium series chips. You must select Menu. The "Browse files" to access the MMC card option. Once the selection screen opens, choose which card or file you want.

FYI...All of Lowrances HD models come preloaded with pretty much every major lake and river in the US.

Lemme know if this helps...
Triton72

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1 Answer

transducer is mounted on a plastic bracket to trolling motor. when trolling motor is turned on, black vertical lines appear on my screen. lowrance x107 cdf


Are you utilizing another unit in your dash? If so, sometimes when both units are on and in sonar mode, their frequencies will intefere with each other causing the vertical lines. I would suggest turning your dash unit off or lowering it's Hertz rate from 200Hz down to 50Hz.

Funny story...I saw this same issue on my boat years ago. I had an X102C up fron and an LCX-19c in the dash. I acutally thought it was some sort of man-made structure and spent time fishing it...DOH!

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1 Answer

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Try a soft reset first, if that doesn't correct it try a hard reset. BE SURE and Save Data before th eHard Reset, it clears all waypoints and such.

Soft Reset Hard Reset

LCX 15mt Reset 1. Turn unit OFF 1. Turn unit OFF 2. Press and hold the PAGES key 2. Press and hold the ZIN&ZOUT Keys at the same time 3. Press and hold the PWR key 3. Press and hold the PWR key 4. Release both buttons when the USA map appears 4. Release both buttons when the USA map appears

Jun 26, 2007 | Lowrance LC X-15MT Sonar

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