Hi Colin
I live in the UK and frequently exchange damaged individual contacts. ?I have no direct knowledge of the TM504, but, the best way to resolve such a problem is very dependent on the exact connectors used and just how good the access is.
If you take a couple of photographs of the damaged connector and email to me at G6HIG at Yahoo dot com I may be able to advise you
Regards
George G6HIG
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On Thursday, March 21, 2019 5:53 PM, Hawker <rick@...> wrote:
I just went through this on my TM504A where the high current pin was bad so the module worked but it didn't sense high current. There were multiple problems, a bad contact and a cracked frame, that I didn't notice until I was in there and had it apart.
First off TM500x connectors go bad, they get brittle from age and heat, crack and go bad. So if it isn't bad now it may eventually. For this reason DO NOT USE A NOS replacement part because the plastic is old and it is likely to crack again. And don't screw around with just replacing the bad contact.
The? EDAC? 305-056-520-201 is not a perfect replacement, the exact part is no longer made. But this part is still available and will work. Us it.
To get the old part out careful work with a Solder Pullet should do it. I didn't have good luck with solder wick.? Go slow and careful and make sure it is fully heated before you hit extract. If you can't get it easily you can cut the connector or pull individual contacts from the other side.
While you are in there put some Deoxit on the large Power BJTs where they slide into the connector and make sure all the BJT screws are tight (but not too tight or you damage the insulator). Also a good time to check the caps and make sure they are all still good.
