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Custom Cable Creation

Posted on 2013-06-20
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Last Modified: 2013-09-09
I need to extend a proprietary IBM cable about eight feet.  I tried to do it myself with mixed results, the monitor worked but was tinged red.  

The cord itself is fifty wires with a ground shielding braided around it. I tried to use two db 50 M/F on each end but my crimping wasn't good enough.

I have contacted five websites that say they do custom cables each has tried to sell me VGA cables.  

Are there any actual businesses out there that truly will make a custom cable.
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Question by:Millkind
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by:David Johnson, CD, MVP
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Guessing that IBM no longer stocks that item.
Do you have the pinouts and the connecter names (amphenol part #)
Is the connector still available? or does someone have to use the existing cables?

You could probably get a technician locally that could extend the cable.  Does the cable itself have any identifying marks i.e. belkin
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by:Davis McCarn
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by:Millkind
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This is a proprietary cable from an IBM SurePOS register connecting the monitor/tablet to the main unit.  I need to extend it by eight feet. It closely resembles and old scsi 1.  The are 50 wires in the cable and it is has a braided ground sheath.  The part number is TSCC00718 and the IBM FRU P/N is 42V3945. There is no name on the cable itself.  I know of no techs in the area who can do this.
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by:pgm554
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You may not just be dealing with a pin out issue.

SCSI and parallel have distance limitation issues and upon looking at your cabling and how it may work,that could be the issue.
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by:Davis McCarn
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That display is using LVDS which is the same as most laptops.  You can extend it; but (!!!), LVDS uses twisted pairs so you need to match each pair as it is wired in the original cable.  They ought to be visible as Blue/White and White/Blue.
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by:pgm554
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The old LVD SCSI procedure for extending the run.

So maybe a LVD SCSI cable will work.

http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-4AQSCA
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by:Davis McCarn
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Unfortunately; that isn't the right connector ends, he needs Centronics 50 pin and old SCS1 cables only have 29 wires that are not twisted pairs.
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by:pgm554
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Here you go.


http://www.cablestogo.com/product/28152?utm_source=Google&utm_medium=Shopping&utm_campaign=SEM&gclid=CL2L4NPK9bcCFUpyQgodzj8AFQ

These folks do build their own custom SCSI cables.I've used them in the past.
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by:Davis McCarn
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Again; he needs a 50 pin Centronics male to 50 pin Centronics female; but, has to match IBM's use of the twisted pairs in the extension cable.  Since I cannot find the pinout for the existing cable anywhere, he's going to have to take the hood off of one end and diagram the pairs.  If he's really lucky, it will be 1 &26, 2&27, etc
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by:pgm554
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Looking at the connector pictures ,I see a 68 pin vhd on one end and a 50 pin Centronics on the other or am I mistaken?
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by:Millkind
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pgm554 Yes that is what they are, but the sizes are slightly off i believe.  I will check those sites Monday.

DavisMcCarn Wow. That is some detailed stuff.

Thanks for the assists everyone.  Great weekend.
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by:Davis McCarn
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After 37 years of fixing these things; most days, I really do have a clue.....
I could make your cable; but, it would be a couple of hundred bucks and I'd have to have that 42V3945 so I could map it out.
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by:pgm554
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Having been in the biz a few years myself,all I can say is,there are folks that do this everyday and have the economy of scale pricing and equipment to do so effectively.

I go back to the days of having these folks building me custom length LVD  SCSI cables for Tandberg  and Cipher reel to reel tape drives.

They know what they are doing and guarantee their work.
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by:Millkind
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I was ina very bad motorcyclr accident sunday. Almosr lost a foot. It will be a while but i will get back to this. Thanks.
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by:Davis McCarn
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You just worry about getting better, OK?
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>> I was ina very bad motorcyclr accident sunday

Don't you just hate that?  
Glad you didn't loose any body parts, though.  Get well soon.

A fellow rider.
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