Turns out that the solder was wicking up the leads and shorting to the can.
Regards,
Steve Smith
Product Engineer
Staco Energy Products Co.
Web Site: www.stacoenergy.com
& www.stacopower.com
DISCLAIMER AND/OR CONFIDENTIALITY NOTICE:
This message, including any attached materials, is intended solely for the use of the individual or entity to whom it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this electronic mail transmission is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please e-mail or call Staco Energy Products Co. at (937) 253-1191. Thank you for your cooperation.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Thursday, September 20, 2007 5:16 PM
To: [log in to unmask]
Subject: Re: [TN] SV: [TN] Problem with a crystal solder joints
Here are two possible causes if it is not the solder joint itself.
1. The metal can is shorting out to the traces on the board, pulling the signal to ground. When you take the crystal completely off and put it back on, it is possible you are inadvertently soldering it back down with a small amount of space under the part, fixing the short. This would also make sense if you are able to push it to the side to fix the problem.
2. The lead connections inside of the metal can crystal are defective. When you completely unsolder the leads, the heat from doing so is "repairing" the connections further up the leads, inside the can.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord
Sent: Thursday, September 20, 2007 3:47 PM
To: [log in to unmask]
Subject: [TN] SV: [TN] Problem with a crystal solder joints
Cold solder joints sounds as one of many explanations.
/Inge
-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Steve Smith
Skickat: den 20 september 2007 22:26
Till: [log in to unmask]
Ämne: [TN] Problem with a crystal solder joints
We recently came across a problem where thru-hole crystals (vertically mounted HC49U cases) on some boards acted as if they where not soldered properly. We could physically push some of them to the left or right and they seemed to make a connection. If we removed the crystals and resoldered them they worked just fine. I was obviously thinking we had some bad solder joints but they looked fine on initial inspection. We tried to reflow the solder joints without removing the parts with no luck, they would not work unless we removed the part first and resoldered. Any ideas on what we are seeing here?
My regards,
Steve Smith, C.I.D.
Product Engineer
Staco Energy Products Co.
301 Gaddis Boulevard.
Dayton, OH 45403
Web Site: www.stacoenergy.com
& www.stacopower.com
DISCLAIMER AND/OR CONFIDENTIALITY NOTICE:
This message, including any attached materials, is intended solely for the use of the individual or entity to whom it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this electronic mail transmission is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please e-mail or call Staco Energy Products Co. at (937) 253-1191. Thank you for your cooperation.
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