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I was trying to take apart a Toshiba T1950ct laptop to replace slim floppy drive:s belt. Unfortunately, I broke the delicate flat flex cable (ffc) which is non standard 26 pin floppy cable. Motherboard has narrower pitch on cable and floppy side is wider, that is standard. So new drive wont help the situation. Space is very limited also.

Any T19xx series use same cable, maybe other maker or model too? Question is where could I find one? It does not need to look same, or be same shape, and can be longer. Only thing that matters is flatness, similar ends and motherboard side of the flat flex cable. It does not have Toshiba part number, only thing that has been mentioned is the connector "Pj202". pic Similar ends, drive side is the wider one.

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Most laptops of that time period used a straight through flex cable with the same pitch connector on both ends, so yours is custom made for that series/model. While there may be other laptops that used the same pitch on the motherboard connector, finding one that would be long enough, and even which model laptop has such a compatible cable, would be a monumental task.

If you could find a flat bed scanner, you could flatten the cable and scan it. Then you could send the scanned image with dimensions and specifications(such as which side of each end has the contacts exposed) to a flex cable house for a prototype quote, and if you could find an inexpensive-enough manufacturer, you might be able to get several samples for less than the price of a night's worth of pints for each sample. You could then re-sell the extras in case anyone else ever wanted the same cable.

An alternative would be to try to repair the cable you have. If only two or three traces are damaged, you might be able to carefully solder enameled wire or wire-wrap wire between the ends of the existing cable, if you can access any copper protruding from the connectors on each end.

A third option, if you wanted to "roll your own", would be to purchase two shorter standard flex cables, which are easily sourced. You would purchase one cable of the proper pitch for each end of your old cable, and then design and etch a thin printed circuit board to adapt the two differently-pitched cables together by soldering the cables to the adapter board.

All of that being said, it may be less trouble to just purchase another scrap laptop of the same model, so that you would also have other spare parts for use later.

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  • I would love to buy spare laptop, if they were ones in local market. Sadly that is not the case :( There is always Ebay, but price range is way beyond reasonable cost of cable. – Petri-fied Aug 23 at 14:59
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Cables and Chips in NYC might be able to make one. They do all sorts of one-off custom cables. Not sure if they do flat flex though. Got a custom SCSI cable for an ST from them back in the day; they had it done within an hour.

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Making your own cable is another option. Flexible blank PCBs such as this (Pyralux) or these (1-ply fiberglass) are available1; they can be etched using standard home etching techniques2. You could scan the existing cable, use a paint program to trace the tracks (in black-and white), then etch the board as normal.3

Alternatively one could use a commercial PCB manufacturer. PCBway, for example, will do a 2-sided flexible board of up to 429×449 mm for about US$125 to US$200 delivered.

1 Pyralux is probably more robust than fiberglass.
2 I've had good success with the chemicals she uses (hydrogen peroxide, vinegar, table salt).
3 The full process is left as an exercise for the reader. For fine-pitch traces, using photosensitive dry film would likely work better than using the toner transfer method; this video shows how to use it.

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  • Thank you for the answers. I was hoping to find a ready made solution. Found out that there is one possible model in floppyemulator.com/products/… that might work, but lots of if:s. If it fits in a cramped space and if the pitch is right. It just costs shipped (64 us dollars) before import duty and vat. That is more than i paid of the laptop, and still needs to add cables to the order too. The cable has teared more than half way and and is too narrow in my opinion to repair without a professional tools. – Petri-fied Aug 10 at 8:07
  • If you have a scanner, a laser printer, a clothes iron, vinegar, hydrogen peroxide, and salt I'd give the DIY approach a try. It's pretty cheap and easy to do. If you do, I'd recommend using the Kapton PCBs; they're a bit more robust than the fiberglass. – Alex Hajnal Aug 11 at 2:07
  • Good tip, but those lines are two hairs apart, i dont think its possible but have no experience of that. Maybe order a cable that fits in the motherboard connector and leave it there for future purposes? At least i can get the laptop back together. Tried scraping and sanding contacts in the ffc /fpc cable.Then tried soldering with solder paste, liquid and resin but no luck. – Petri-fied Aug 11 at 14:38

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