My quest for a cheap LCD for Neato XV!

[jpccusa]

This is the connector attached to the board.


And this is the LCD screen ribbon.


The ribbon was inserted into the connector with the golden pads touching the white part.

On a side note, is there a way of fixing/working around the /Res pad issue? The wire that WAS connected to it came loose and now there is virtually nothing left to solder it back to.

[mfortuna]

Your pictures are not showing up for me.

As far as the res pad is concerned, you can scrape off the coating on the etch that leads to the resistor and solder it there. You could also solder it to the side of the resistor labeled R10.

[JEfromCanada]

Your pictures are not showing up for me.

That's weird... the pictures were showing for me before, but no longer. Maybe the OP deleted the pictures from where they were hosted?

[jpccusa]

I haven't changed anything (moved or deleted them).
I just now edited and re-uploaded the links. Let me know if you are still not able to see them.

[JEfromCanada]

That's weird... the pictures were showing for me before, but no longer. Maybe the OP deleted the pictures from where they were hosted?

They're back now!

[jpccusa]

Great, it worked.

So, is my connection right? The golden part of the LCD ribbon faces the white part of the SIF connector, right?

PS; Scraping above the /Res pad worked. I have a better place to solder that wire now.

[oxdbxo]

Tris, I have a question

in case of using this,


change the number like this

and visual representation,

Right?

[jpccusa]

Quick update... IT WORKS!!!



The problem was indeed the loose /RES wire.

Thank you so much for all the help, specially Tris. I saved lots of money, learned new skills, and challenged myself to make this work.

[Tris]

Tris, I have a question

in case of using this,


...

Right?

That connector looks like it is designed for downward facing contacts (towards the board).
If this is so then you will have to flip/mirror the connections, like my MkII.
jpccusa's board is for upward facing contacts.

Assuming you still align the ribbon to pin 1 on the ZIF connector then pin 31 moves to pin 1, pin 30 moves to 2, etc.
The unused V0 would end up being on pin 31.

[Tris]

Quick update... IT WORKS!!!

The problem was indeed the loose /RES wire.

Thank you so much for all the help, specially Tris. I saved lots of money, learned new skills, and challenged myself to make this work.

Well done, I'm glad you managed gain so much from doing this project!
Enjoy your Neato!

BTW, the image isn't showing...

[asedovski]

Thank you very much!!!
It helps me a lot!

Juts few remarks based on my experience repeating this:

1) If you decide to proceed with LCD like it described (to fix mirroring) then you may leave original back light LED. In my case it was stayed on pcb while i was removing broken LCD and I decide to solder them out later one, but finally find out that its good to leave them as well as original plastic thing that was under the original LCD.

2) If you decide to proceed WITHOUT switching neato off (I was not sure in my result and decide to keep my current schedule in memory, If it wiped - then its almost impossible to setup it again without LCD) then you need to know that after connecting - you need to press buttons (In my case it was: start working, pause, stop) to see images on LCD, other wise it will stay blank (looks like each time you start/stop it reinitialize LCD)

3) If it your first time soldering 0.5mm (like it was for me) order two connectors!!! And ensure that you understand soldering techniques It was good that I order two of them like it was reccomended here.

Once again - THANKS A LOT, It is awesome!!!

PS: I was mistaken and order smaller LCD... but they still compatible

[Tris]

Excellent, another XV saved!

Yes, retaining the original backlight is a great idea. I removed the broken LCD as a complete unit because I had no idea at the time that I would end up having to pull the backlight off!

Performing this (or any) repair with the power still on is very risky, it is never advisable to work on a circuit whilst it is powered! It would only take something like a dropped screw on the circuitry to blow it.

BTW, The schedule and other settings can be configured over USB using the program "Neato Control", available at...
https://bitbucket.org/heXor/neatocontrol

Which replacement LCD did you actually order, out of interest?

[oxdbxo]

thx Tris....

but the screen was flipped horizontally....

lol

What is wrong with this?

[Tris]

Flipped screen covered early in this thread!!

viewtopic.php?f=20&t=19263#p137446

[oxdbxo]

Flipped screen covered early in this thread!!

viewtopic.php?f=20&t=19263#p137446

holy cow! I missed that. How stupid...

Thanks bro

[alexkilfr]

Tris, I have a question

in case of using this,


change the number like this

LCD Connections.jpg

and visual representation,

FPC40-to-DIP40-1.jpg

Right?

Hi, I had bought the same adaptator as oxdbxo and done the same soldering as in the visual representation above. And my display still not showing anything !
any piece of advice ?

[Tris]

You'll have to post some close up photos of your work, not much I can say otherwise apart from go back to square one and check everything. Closely.

[alexkilfr]

I have made some pictures about my soldering ( the solders begin to look ugly, due to my many tries after all my fails)

You'll find my photos in the URL attached

https://goo.gl/photos/HYZHB8YmqNEETpE47

BTW, thanks for the answer

[Tris]

Get a multimeter and check that there are no short circuits between any of your wires. It looks like there may be a short here, circled in red...

Be sure to remove all solder spikes and splatters.

[alexkilfr]

I have checked every solder and everything is good so far (no short circuits). I start thinking my lcd is not working. I'm gonna order a new one soon to test it.