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Mine Exploration Forum

Author Replacing Sten S7 Leds question.
Dean Allison

Joined: 13/01/2008
Location: Northumberland

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Replacing Sten S7 Leds question.
Posted: 18/03/2012 13:14:27
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I need to replace the leds in my old Stenlight, I have them here ready to solder in, just wondered if I need to use any kind of thermal paste on them and if so, what would be the best type? Or would those thermal pads be best? Any advice would be most appreciated! Cheers Smile IP: 92.23.117.181
royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Replacing Sten S7 Leds question.
Posted: 19/03/2012 09:49:14
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Dean Allison wrote:

I need to replace the leds in my old Stenlight, I have them here ready to solder in, just wondered if I need to use any kind of thermal paste on them and if so, what would be the best type? Or would those thermal pads be best? Any advice would be most appreciated! Cheers Smile


Assuming that they are bare LEDs it is imperative that the heat sink base of the emitter is properly mounted. Different LEDs are mounted differently, the very small footprint XPGs are soldered, while the larger ones use thermal epoxy.

Other than this I can offer no advice as I know nothing about Stenlights, it will need Simon or someone who has worked on these to advise further.


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Vanoord

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Joined: 28/11/2005
Location: North Wales

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Replacing Sten S7 Leds question.
Posted: 19/03/2012 10:24:28
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I believe Simon has upgraded a few StenLights and can offer that as a service.

He's been away and I believe is back shortly, so I'm sure he can clarify then.

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SimonRL

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Joined: 27/11/2005
Location: North Wales

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Replacing Sten S7 Leds question.
Posted: 19/03/2012 11:26:42
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Sorry for the delay replying Dean, been away for a week.

Right then, the process for replacing the emitters will vary according to which revision of StenLight you've got. You can ID this from the label inside the lamp. It'll read something like S7C, S7D, S7E, S7F then some numbers. The C, D, E is the revision number.

If you can let me know that I can tell you the next step.

If your lamp is an old / original S7 with Luxeon III emitters then you'll need carrier boards for the emitters. Don't solder anything directly to the silver pads behind the old Luxeons!


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Dean Allison

Joined: 13/01/2008
Location: Northumberland

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Replacing Sten S7 Leds question.
Posted: 19/03/2012 17:43:52
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Thanks guys. Simon, it is the original old S7 stenlight with the luxeons. I haven't opened up the lamp yet so I am not sure what you mean by "carrier boards". Is this something I can buy or will I have to send the lamp away to get sorted out? Thanks Smile IP: 92.30.195.248
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