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Repairs: Repairs

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#332122 - 15/04/2010 17:01 Electronic component identification
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
I have a PBX telephone that has gone bad solely due to the switch that deals with the hook button. It's a simple switch, but in order to replace it, I need to find one that is physically identical, as it has to line up with some plastic parts. And I can't find it.



"DC" is the only marking on the switch, unless there's something on the bottom touching the PCB. It's a momentary DPDT switch, normally connecting the middle and top pins, and momentarily connecting the middle and bottom pins. There are two rows of the three pins, which accounts for the DP part of the description. There's spring pushing the button upwards. The box is about 3/8" × 5/16" × 1/2". That's wide/deep/tall in relation to the photo.

I've looked through a number of catalogs and can't find anything that comes close to resembling that pseudo-right-angle attachment, and searching for "electronics switch DC", not surprisingly, isn't terribly helpful.

Anyone have any ideas?
_________________________
Bitt Faulk

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#332124 - 15/04/2010 18:21 Re: Electronic component identification [Re: wfaulk]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14483
Loc: Canada
Worst case: open up the existing switch, clean/lube contacts, maybe even reverse the contacts to even out the wear.

Cheers

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#332126 - 15/04/2010 18:40 Re: Electronic component identification [Re: mlord]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Oh, I already did that, but there's no way the repair is going to last.

There are two tiny metal clips that sit inside the plastic body of the switch button that ride over the connectors. One of the clips had gotten slightly bent and was preventing the switch from returning to its normal position. I tried to bend it back, but the metal is so delicate and the parts so small that, despite the fact that it works right now, the clip is quite mangled. I'm amazed that it works at all.
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Bitt Faulk

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#332129 - 15/04/2010 20:33 Re: Electronic component identification [Re: wfaulk]
siberia37
old hand

Registered: 09/01/2002
Posts: 702
Loc: Tacoma,WA
You're probably just going to have to find a switch that is close enough and make it work with duct tape, glue and bailing wire. It's a time honored American tradition.

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#332130 - 15/04/2010 20:41 Re: Electronic component identification [Re: siberia37]
tman
carpal tunnel

Registered: 24/12/2001
Posts: 5528
What siberia37 said. It is either that or find another broken phone and take the switch assuming its still working.

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#332132 - 15/04/2010 21:25 Re: Electronic component identification [Re: tman]
RobotCaleb
pooh-bah

Registered: 15/01/2002
Posts: 1866
Loc: Austin
Or just a co-worker's phone. Broken or not, you're more important. smile


Edited by RobotCaleb (15/04/2010 21:26)

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#332136 - 16/04/2010 00:08 Re: Electronic component identification [Re: tman]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Oh, duh. I do have a broken one lying about.
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Bitt Faulk

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