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Tektronix TDS744 CRT to LCD color converter FPGA module DIY
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ltarjanyi75:

--- Quote from: TerrySt on December 24, 2023, 01:39:05 am ---Which socket did you try?

--- End quote ---

I ordered my sockets from Ali:https://www.aliexpress.com/item/1005003506048098.html?gps-id=pcStoreJustForYou&scm=1007.23125.137358.0&scm_id=1007.23125.137358.0&scm-url=1007.23125.137358.0&pvid=7ec44edf-75ce-4692-916c-282a1ee4d143&_t=gps-id:pcStoreJustForYou,scm-url:1007.23125.137358.0,pvid:7ec44edf-75ce-4692-916c-282a1ee4d143,tpp_buckets:668%232846%238107%231934&pdp_npi=4%40dis%21HUF%21178.56%21178.56%21%21%210.50%21%21%402101cff817034629856118168ecfc4%2112000026094301457%21rec%21HU%211629207339%21&spm=a2g0o.store_pc_home.smartJustForYou_6001943031111.1005003506048098

It has 4 stand offs at the bottom, which I milled off. I will try to sand the top of the socket, will see how much it helps.
I could not remove the contacts, it seems to be moulded into the plastic case.

And I also will order the Method and Assman version you recommend...
ltarjanyi75:

--- Quote from: Tantratron on December 24, 2023, 08:58:16 am ---How many pins from U199 one needs to electrically access and routed to the FPGA ?

--- End quote ---

As Terry wrote, 22 pins + GND has to be accessed, he also included a schematic.
If it helps I can also make a picture of the RAMDAC area of the scope...
TerrySt:
All of the through hole sockets I’ve looked at have a removable bottom that allows you to get to the contacts to re-shape them.  The SMT sockets don’t however.
Tantratron:
Merry Christmas All,


--- Quote from: ltarjanyi75 on December 25, 2023, 12:31:17 am ---As Terry wrote, 22 pins + GND has to be accessed, he also included a schematic.
If it helps I can also make a picture of the RAMDAC area of the scope...

--- End quote ---

Yes please, picture would help me to vizualize.


--- Quote from: TerrySt on December 25, 2023, 01:14:33 am ---All of the through hole sockets I’ve looked at have a removable bottom that allows you to get to the contacts to re-shape them.  The SMT sockets don’t however.

--- End quote ---

Attached again picture I've grabbed from an italian eBay seller few years ago which as re-selling the first version based on Hitachi LCD-TFT unit. We can guess printed a M on brown socket (top left), do you know if this means the brand is METHODE ?

Are you really sure there is not Methode socket which does not not require any milling or grinding ?

Later Simmcon Labs made FPGA board to work with AUO LCD-TFT but there is no reason why socket would change since U199 chip has always been the same on any TDSxxx lofic board.

ltarjanyi75:

--- Quote from: TerrySt on December 25, 2023, 01:14:33 am ---All of the through hole sockets I’ve looked at have a removable bottom that allows you to get to the contacts to re-shape them.

--- End quote ---

You are right again. I could remove the bottom of the socket. But for sure, you must be very patient!
I already succeeded to break some pins, and I don't know that the ones I didn't will be ok at the end. Finishing with 44 pins is a real puzzle.
 
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