Openmoko Bug #2019: Headphone Jack Event

[Openmoko Public Trac]

#2019: Headphone Jack Event
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    Reporter:  Zoup     |        Owner:  openmoko-devel
        Type:  defect   |       Status:  new           
    Priority:  normal   |    Milestone:                
   Component:  unknown  |      Version:  Om2008.8      
    Severity:  normal   |   Resolution:                
    Keywords:           |    Blockedby:                
Reproducible:  always   |     Blocking:                
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Comment(by werner):

 Finding a replacement jack should be easy, but ...

 Unfortunately, removing the jack is extremely hard: you have to melt the
 solder on all six pads, which are large, far from each other, surrounded
 by small components, and one even attaches to the ground plane, which
 acts as a large heat sink.

 So without special equipment and plenty of experience using it, I'd say
 that the most likely outcome of trying to remove the jack would be that
 you'd end up damaging some of its surrounding components, without moving
 the jack itself a tenth of a millimeter.

 The most likely outcome of trying to unsolder the jack is that you'll
 damage or remove some of its surrounding components and that you'll
 apply too much heat to its pads, damaging the PCB.

 You could improve the odds by cutting the jack into pieces, e.g., with a
 dremel, and then unsoldering the remaining metal parts. Again, one slip
 and some other components get shredded. This kind of mechanical removal
 also has the risk that you apply too much force on a pad and lift the
 pad off the PCB, breaking the connection and possibly also damaging
 layers inside the board.

 These are not just hypothetical risks. I've seen this happen numerous
 times on circuits that were much easier to work on.

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/2019#comment:29>
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