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Tue, 23 Apr 2002 10:24:39 -0700 |
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Andre,
If the flux gets in there so will the solder!
David A. Douthit
Manager
LoCan LLC
Andre Leclair wrote:
> We have recently run across a situation which has baffled us. On the PCB
> in question there are 4 Wave soldered PLCC sockets. 1 of these is being
> reported as having solder shorts underneath. On the returned units we x-
> rayed the sockets ( can't see under) and found shorts on 1 socket location
> only. The shorts were consistanly on the same pin area for all the sockets
> were the shorts were found. We removed a socket only to find the board
> very clean underneath...no shorts..
> The socket has a bottom retainer to hold all the pins in place.. This was
> pried off and to our surprise there was the short.. inside the connector.
> The amount of solder was enough to surround 3 pins in 2 seperate areas.
> The hole around the pins in the plastic base is no more then 0.002".
>
> Does any one have any idea how solder could have gotten up inside the
> connector ( consistantly in the same location)? Or has any one seen this
> before?
>
> We have run this assembly several times in the past with no difficulty.
>
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