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Hi all, working on my 8656B sig gen, and managed to break the IDC Centronics connector , so the cable is no longer attached. Is there a suitable replacement available taht is not too ex[ensive. Have to replace teh mains socket as smoke came out, still waiting on that, and it cost over $86Aus? from RS on its own.I don't want to spend more than the device is worth to fix it, not that I am likely to use this port

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Wayne

VK2WDE

You know, if it's not broken too badly, you can reattach the IDC into the ribbon cable manually by slowly and carefully jamming the leads against the forks in the connector. Put the connector in a vise or other secure holder, and align the ribbon cable carefully to be sure of the right pinning, with the forks in a fresh spot on the insulation. Then use a broad flat screwdriver tip or a piece of sheet stock to gradually push the lines into the forks. Start between the rows of forks, and run back and forth across from one edge of the cable to the other, each time pushing the insulation a bit deeper until punched through. Then push the areas farther out from centerline a little at a time until it's reasonably flat and thoroughly punched through all around. If the plastic cover is intact you can attach it and squeeze it tight, or epoxy it on if necessary.

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If it's messed up so much such that the forks can't be used, you can with some artful lead prepping just solder each one to its corresponding fork directly. This old-school stuff is big enough that a steady hand and decent vision can get the job done, and there aren't all that many lines - I think 20 or 24 max. Use a small iron, and pre-tin the lead ends and forks.

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Ed

Hi thanks for the reply, I think part of the connector may be missing, I have moved house a few times , with the back panel hanging of the unit? from when I was investigating the power socket issue. This is what led to the cable being pulled out of the connector. I will have a close look and see what I may be able to do when the power connector gets here.

Also my eyesight and steady hands are not what they used to be.

Do the documents indicate which colour wire is pin 1?

?I need to blow up the manuals more to be able to read them

Hi Peter, thanks for the advice. I have completed the other repairs? and powered the unit up. amazingly frequency and amplitude appear to be pretty much spot on. Not bad for a unit that hadn't been powered on for close to 20 years.

?I have lost all the retaining screws for teh back panel, and assumed they were M3, but that seems a fraction small. Can someone tell me what size and thread they are so I can try and source some. Don't want the back falling off now I have the mains fixed.

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Also are there any common issues with capacitors etc? Probably worth replacing any that need doing whilst it is partially dismantled

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Wayne

VK2WDE