kt-lcd3 faulty

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degzie   100 µW

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kt-lcd3 faulty

Post by degzie » May 13 2018 7:56am

i have a fault with remote switch, it was ok till one day when i was using the bike.
i could power the display on but the power assist was not advancing up, i pressed the up button several times then i pressed the on button and it went up through the levels.
then i tried the down button and it would not go down.
i tried a few times powering on and off, removing battery and still the same fault.
so i decided to disconnect it from the bike and disassemble the remote switch and lcd, i found that the green wire in the remote switch was broken so i stripped back the wires and re-solder to the switch.
now when i try to power it on the lcd does not stay on, if i keep the middle button pressed it stays on but no battery level, battery is fully charged.

derek

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eee291   10 kW

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Location: Austria, Burgenland: Güssing

Re: kt-lcd3 faulty

Post by eee291 » May 14 2018 1:07pm

Pictures please

degzie   100 µW

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Re: kt-lcd3 faulty

Post by degzie » May 14 2018 3:19pm

would you like pictures of the circuit board and switch or the lcd powered up.
cheers
derek

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eee291   10 kW

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Re: kt-lcd3 faulty

Post by eee291 » May 15 2018 7:27am

I guess the pcb and the wire that you fixed.

degzie   100 µW

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Re: kt-lcd3 faulty

Post by degzie » May 17 2018 1:27pm

this is the rear of the lcd3, the green wire number 9 which was broken at the remote buttons
resize 1.jpg
remote buttons
resize 2.jpg
resize 2.jpg (84.2 KiB) Viewed 315 times
derek

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eee291   10 kW

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Location: Austria, Burgenland: Güssing

Re: kt-lcd3 faulty

Post by eee291 » May 18 2018 7:16pm

What's with the yellow wire on the left side? looks broken.

Also if you have a voltmeter try checking the connectors on the controllers and see if you have the same voltages on the on the wires on the pcb.

If you can't find a fault, then you might have to buy a new replacement LCD.

You can have them for about 30 to 50 Dollars

degzie   100 µW

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Joined: Apr 05 2018 2:57pm

Re: kt-lcd3 faulty

Post by degzie » May 19 2018 4:38am

hi
i did buy a new lcd3 and fitted it all working ok now.
on the old lcd i done continuity checks on all the wires, even stripped back and re-soldered but no look.

cheers
derek

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