I have seen where a surge on the power line can damage a silicon device such as a rectifier or Solid State Relay causing the device to internally arc; not drawing enough current to open the fuse or breaker and putting out huge amounts of heat which will melt PCBs and plastic chassis parts.
A cold solder joint or any poor connection in a high current circuit such as your rectifier can heat up and start melting stuff, too. The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of Scott Xe Sent: Tuesday, June 26, 2007 9:44 AM To: [email protected] Subject: Caught fire during stand-by mode I have heard such failure in catching fire during stand-by mode for long but never seen a real case. Recently, we have a returned multi-functional audio video product having such symptom: part of cabinet melted and the pcb around the power rectifiers area burned out. I tried to locate the possible causes of catching fire. However, under such circumstances, I have no idea how to start the investigation. Can someone point me out somewhere to have such investigation reports for reference/information or any guidance to such study can be shared. Thanks, Scott - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
