n a message dated 02/01/2000 6:15:30 PM Central Standard Time, [log in to unmask] writes: > We ran a batch of boards that had surface mount PLCC84pin sockets. PLCC > components are placed prior to shippment. Our customer have noticed that > few boards had disconnected socket pins(one per socket). Only thing that I > could think of that would cause this to happen is, installation of PLCCs > into its socket, creating enough shear force on the connector to break the > solder joint. I didn't get a chance to look at the broken solder joint > itself, but I took a look at some of the finished goods in house, and the > plastic housing on the sockets bow out a little bit upon insertion of PLCC. > Has anyone seen this before? What else might cause this to happen. > Customer had stated that the solder joints are well wetted. Any input is > greatly appreciated. > > Tom Hi Tom! I think most manufacturers of PLCC sockets got the dimensions down so that there shouldn't be any damage created when inserting the PLCC. Now they're gonna be tight, but that's the way they're supposed to be. If it were indeed the socket, you should see the problem on more than a few boards I would think... But, should something happen like a mistake made by someone inserting them in the wrong way (wrong polarity), and then they realize it and go back and correct them by prying out the PLCC with something other than a PLCC pulling tool, I could see where that might happen...especially with a large 84-pin...gotta pull those things out carefully with the right tool. Just a guess.... -Steve Gregory- ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################