Sony ericsson K800i housings
in [UK Mobile]
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From: Kevin Reilly on 22 Jun 2008 12:10 On Sun, 22 Jun 2008 hamsatuk wrote: >switching it on and off. On reexamination there appears to be two >metal tags which I assume the button when pushed down causes something >to touch these two contacts to create a circuit which then turns the >phone on. As I have stated I do not have this part and it was not >included in my new pack, also there has not been a mention in all of >the instructions on disassembly and re-assembly that I have read on >the internet. That sounds a bit worrying. The physical on-off button on the K800i is nothing more than a disc of plastic floating in a rubber membrane held in place by the front of the casing. The actual on-off switch is immediately below this, on one of the PCBs forming the core of the phone. With just the upper-rear casing removed it's possible to push the rubber-and-plastic on-off button away from the body and get to this switch directly. It's a tiny black thing, probably less than 1mm wide, and you can press it in with a watchmaker's screwdriver or similar if you want to test the phone before re-assembly. It sounds to me as though on of two things has happened. Either you've mistaken the switch housing for a couple of metal contacts (there are exposed metal pieces either side of the black switch itself) in which case have a closer look and you should be able to see the switch in between these two 'contacts'. If this is the case then your problem may be as simple as a 'sticky' button that's not reaching the switch properly. This is quite common and often needs nothing more than a disassembly/re-assembly to loosen it. The other alternative is that the switch itself has broken away from the PCB and you are literally looking at two surface-mount contacts where the switch body should be. If that's the case then you're going to need someone with very good electronics skills to Jerry-rig some sort of switch assembly under that button, unless you can find a dead k800i from which to salvage the switch. Either way you're looking at a very fine soldering exercise. Take a look at http://www.denali.org.uk/sek800i/eric.jpg and you'll see the arrangement I'm talking about. If yours looks similar then you should be OK and it's just a matter of aligning the outer button with the inner switch. If not, good luck in finding a replacement :( -- Kev __________________________________________________________________________ "Man fatally slain." Newspaper headline
From: hamsatuk on 14 Jul 2008 08:50 On Sun, 22 Jun 2008 17:10:40 +0100, Kevin Reilly <usenet(a)denali.org.uk> wrote: >On Sun, 22 Jun 2008 hamsatuk wrote: > >>switching it on and off. On reexamination there appears to be two >>metal tags which I assume the button when pushed down causes something >>to touch these two contacts to create a circuit which then turns the >>phone on. As I have stated I do not have this part and it was not >>included in my new pack, also there has not been a mention in all of >>the instructions on disassembly and re-assembly that I have read on >>the internet. > >That sounds a bit worrying. The physical on-off button on the K800i is >nothing more than a disc of plastic floating in a rubber membrane held >in place by the front of the casing. The actual on-off switch is >immediately below this, on one of the PCBs forming the core of the >phone. With just the upper-rear casing removed it's possible to push the >rubber-and-plastic on-off button away from the body and get to this >switch directly. It's a tiny black thing, probably less than 1mm wide, >and you can press it in with a watchmaker's screwdriver or similar if >you want to test the phone before re-assembly. > >It sounds to me as though on of two things has happened. Either you've >mistaken the switch housing for a couple of metal contacts (there are >exposed metal pieces either side of the black switch itself) in which >case have a closer look and you should be able to see the switch in >between these two 'contacts'. If this is the case then your problem may >be as simple as a 'sticky' button that's not reaching the switch >properly. This is quite common and often needs nothing more than a >disassembly/re-assembly to loosen it. > >The other alternative is that the switch itself has broken away from the >PCB and you are literally looking at two surface-mount contacts where >the switch body should be. If that's the case then you're going to need >someone with very good electronics skills to Jerry-rig some sort of >switch assembly under that button, unless you can find a dead k800i from >which to salvage the switch. Either way you're looking at a very fine >soldering exercise. > >Take a look at http://www.denali.org.uk/sek800i/eric.jpg and you'll see >the arrangement I'm talking about. If yours looks similar then you >should be OK and it's just a matter of aligning the outer button with >the inner switch. If not, good luck in finding a replacement :( Hi I have put on a new case and key pad and was able to get a new switch on ebay which after some very careful soldering was able to fit, so now the phone looks brand new and so far works!!!!! Thanks for your help and advice. Tony
From: Kevin Reilly on 14 Jul 2008 16:30 On Mon, 14 Jul 2008 hamsatuk wrote: >Hi I have put on a new case and key pad and was able to get a new >switch on ebay which after some very careful soldering was able to >fit, so now the phone looks brand new and so far works!!!!! Wow, that's impressive! I consider myself reasonably competent with a soldering iron and I've done some fairly fiddly repairs to mobile phones, PDAs, laptops etc. but I'm not certain I'd have met with success trying that one. I destroyed a T68i a few years back trying to remove and repair the volume control and that was of a similar size. Kudos on the soldering job, and I'm glad the info helped you end up with a working phone. -- Kev __________________________________________________________________________ "This taught me a lesson, but I'm not sure what it is." John McEnroe
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