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Electronics => Projects, Designs, and Technical Stuff => Topic started by: Deepak on February 27, 2012, 05:53:04 pm

Title: Sourcing .25mm pitch connector
Post by: Deepak on February 27, 2012, 05:53:04 pm

I was hoping that someone would be able to help me track down a source for .25mm connectors for an LCD repair. My understanding is that I'd need to use an anisotropic film or paste to make the connection, so a source for that would help too.

I've spent hours on Digikey and Mouser this weekend without any luck, and an aftermarket replacement board would be a decent chunk of change for less functionality :(

Title: Re: Sourcing .25mm pitch connector
Post by: Psi on February 27, 2012, 11:40:47 pm

I'm not too sure what you need.
Is it a board mount 0.25mm pitch connector for flex cable?

http://search.digikey.com/nz/en/products/XF3C-174541A/OR1019CT-ND/2330586 (http://search.digikey.com/us/en/products/XF3C-174541A/OR1019CT-ND/2330586)

Title: Re: Sourcing .25mm pitch connector
Post by: Deepak on February 28, 2012, 03:53:08 am

I'd guess it's a flexible printed cable, but don't take my word for it.

This picture might clear things up:

http://img19.imageshack.us/img19/4783/20120227224230.jpg (http://img19.imageshack.us/img19/4783/20120227224230.jpg)

Title: Re: Sourcing .25mm pitch connector
Post by: Psi on February 28, 2012, 04:30:52 am

Does the flex cable from the LCD panel solder directly to the pcb?  (hate those)

Title: Re: Sourcing .25mm pitch connector
Post by: Deepak on February 28, 2012, 07:18:42 am

I wish it did - it looks like it's held down with an adhesive, with the exception of the bottom right part, and wraps around to an LCD on the opposite side. I tried hot air without luck, and I think if my soldering iron looked at it sideways it would obliterate the entire cable.

Title: Re: Sourcing .25mm pitch connector
Post by: Rerouter on February 28, 2012, 07:48:53 am

that is soldered on, just was done by pre-heating the board and a quick hand, also hate them so very much, best case, it may be adhered on both edges for cost cutting, but really the only way to fix them would be, if your good with blade to scrape back some of the existing ribbon, and use some conductive adhesive to glue pin to trace, 1 at a time, iron is basically just not a good thing to try,

comes down to how badly you want to repair it, if it really was worth hundreds to you, you could probably find the part number on the lcd and finding a replacement,

is the ribbon secured on the lcd side, e.g. looks built in?,

Title: Re: Sourcing .25mm pitch connector
Post by: Psi on February 28, 2012, 08:30:07 am

I used the iron (on low temp) to unsolder and resolder an LCD flex cable in my Harmony remote control.

Seemed to work fine and didn't melt the flex cable.
However the pitch was much bigger than your cable. I think it was around 2mm.