CDM1250 Loose Power Connector?

Rayjk110 · Post by **Rayjk110** » Sat Feb 11, 2006 10:41 am

Hello. I have a CDM1250 that when the power cord on the back is wiggled or slightly moved, (near the radio) it will power off the radio. (The radio will turn back on right after this with the power-up beep and everything OK.) I didn't know if most mobiles did this as the powercord is obviously not designed to move anyways or if there is something wrong here with mine. Mdl Num: AAM25KKD9AA2AAQS; if it makes a difference.

Thanks for any help.
-Ray

stay-con · Post by **stay-con** » Sat Feb 11, 2006 4:00 pm

Take the power connector off, and turn it around so you can plug in one side at a time. Check to make sure both side mate properly.

Second, take the cover off and look at the solder pad where the back of the connect is sodered to the PC board. (I can't see well anymore, so I use an X7.5 eye loupe to see with). Chances are you have a cracked solder joint.

Jeff

Rayjk110 · Post by **Rayjk110** » Sat Feb 11, 2006 4:04 pm

Alright, thanks. I use the same cord here on my bench for reprogramming and operation, so I know it isn't a bad cord. It does mate properely well with the CDM. I'd have to say that it's a cracked solder. Time to go dig out the iron...

Thanks,

Ray

Rayjk110 · Post by **Rayjk110** » Mon Feb 13, 2006 4:06 pm

Well, I opened it up and everything appears to be just fine. No broken joints or anything, everything is solid. On the outside of the radio where you physically view the connector, it looks like it tilts downwards to the left just a tad bit. Any ideas?

stay-con · Post by **stay-con** » Mon Feb 13, 2006 7:26 pm

Rayjk110 wrote:Well, I opened it up and everything appears to be just fine. No broken joints or anything, everything is solid. On the outside of the radio where you physically view the connector, it looks like it tilts downwards to the left just a tad bit. Any ideas?

The radio got dropped. Order and new power connector and replace it.

Jeff

jackhackett · Post by **jackhackett** » Mon Feb 13, 2006 9:35 pm

Resolder the connector. The factory solder joint on those things isn't very good. I've seen plenty were the solder looks fine, but it's not really making good contact with the pin underneath, pretty much just a hollow blob of solder. I usually take the board out, suck the solder off and then resolder them on both sides of the board (the factory only manages to get solder on the one side).

Also those connectors will look a bit crooked sometimes, especially if the solder joints are bad. I think they have a little tab that gets soldered to ground to stabilize them a bit, but then my short term memory is shot (too much RF I think) so I could be imagining that...

Rayjk110 · Post by **Rayjk110** » Mon Feb 13, 2006 9:59 pm

I'm not too sure on how to take out that whole board inside the radio without probably breaking something important, so I'll do a resolder on the top part of the board and see what happens. Either that or just heat-up the solder already there and smear it a bit to re-gain some decent contact. It's just driving me nuts with every time the radio accidently gets move or bumped on one of my desks that it powers off then on again.(even sometimes when I'm transmitting....that can't be good)

jackhackett · Post by **jackhackett** » Tue Feb 14, 2006 6:25 am

Rayjk110 wrote:Either that or just heat-up the solder already there and smear it a bit to re-gain some decent contact.

Not recommended. Clean off the old solder and redo it with fresh solder, you'll get much better results as the old solder will no longer have any flux in it. Get some solder wick at Radio Shack if need be.
I use silver solder myself, it's a little stronger and conducts slightly better, but regular electronic solder should work fine for a connector.

Do one pin at a time, so one pin is always soldered to keep the connector in place.

Rayjk110 · Post by **Rayjk110** » Tue Feb 14, 2006 3:30 pm

Thanks for the information,