ipk screen information

[cb750chris]

Hi all

I have been following the thread of ipk screens, and from what I can gather the supply is getting scarce now.
Does anybody know what the signal layout of the 44 pin 'interface' between the ipk main board and the screen is? Or anything else about this interface?


I have found that there are 8 common pins, presumably power or 0 volts. If anybody knows more, but doesn't want to post in a public forum, please feel free to send me a pm.


My thought is, if these screens are not going to be available for long, it might be possible to build a custom interface that could be used to replace these screens with sheikh perhaps a little more available.


I seem to remember reading somewhere that the chip used was from the same one as used in an old calculator, but can't find any further details.


Hopefully somebody can help.


Thanks
Chris

[vitesse]

This post might refresh your memory:
https://www.the75andztclub.co.uk/for...d.php?t=306448

Still some available on ebay: https://www.ebay.co.uk/itm/353984171...Bk9SR5jh_rbaYg

But hopefully someone will soon offer the same fitting service as Rick as supply isn't the only problem.

Regards

[cb750chris]

Thanks Vitesse,I ordered one of the eBay ones last week, and fitted it successfully yesterday.
However what I was looking for is information to be able to look at this interface myself. I wondered about getting a cpld board and a LCD screen and coding the cpld to provide an interface - partly for personal interest, and partly to see if I could come in somewhat cheaper than the £99 eBay parts.


I have held back until after Ricksta had wound up his business before asking as I didn't want to try and undermine his business.

Regards
Chris

[Teflon]

Originally Posted by cb750chris

Thanks Vitesse,I ordered one of the eBay ones last week, and fitted it successfully yesterday...........

Just curious - how easy are they to fit? Is it just a ribbon cable to plug in, or is there soldering involved?

Cliff

[Geoff130]

Have a look at the link Vitesse posted, soldering for the experienced only I'm afraid

[Geoff130]

Originally Posted by cb750chris

Thanks Vitesse,I ordered one of the eBay ones last week, and fitted it successfully yesterday.
However what I was looking for is information to be able to look at this interface myself. I wondered about getting a cpld board and a LCD screen and coding the cpld to provide an interface - partly for personal interest, and partly to see if I could come in somewhat cheaper than the £99 eBay parts.


I have held back until after Ricksta had wound up his business before asking as I didn't want to try and undermine his business.

Regards
Chris

Do you know if these are original or the ones made with the new process Rick describes?

[Teflon]

Originally Posted by Geoff130

Have a look at the link Vitesse posted, soldering for the experienced only I'm afraid

Thanks, that's what I feared,

Cliff

[cb750chris]

Sorry for a slow reply..
Changing the screen involves soldering 44 connections with a fairly small gap between the pins.


I have done 2 screens now, and both have a mildly dissapointing shadow in the area aligned with the lit up sections (I understand the probable cause, but still not great- only seems to be visible at certain temperatures and light levels, so I think I am getting picky)


I don't know if they are the built to the improved 'Rick standard' time will tell..

[Doc Evil]

They all come from the same factory Chris, so would have the improvement Rick worked with them on
I think they did a bit of a dirty on Rick and just started selling them again without any thought of Rick's work
He did make a revision to the board itself increasing a resistance and removing a diode presumably to limit the power going thru the lcd display