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Old 04-26-2013, 01:50 PM #1
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Default Blue 1w laser suddenly broken

Hi!

I have a 1w blue laser pen for 3 years now and it worked all the time without problems. But the last time i turned it on, i had to knock on it to get it going. It worked fine then. Now, since i have an lpm and wanted to measure it, i tried it again for the first time after laying around 3 month. It does not work anymore. Not even knocking on it, with fully charged batteries help. I tried it without the tailcap button, directly connected with a cable. nothing. what could be the reason? in the pic you see wich laser i am talking about.
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Old 04-26-2013, 02:29 PM #2
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Default Re: Blue 1w laser suddenly broken

Sounds like a connection or connective surface somewhere in it has corroded/oxidized

Start by checking/replacing the batteries

Then clean up all of the connections you can get to

If both of those fail, you are going to have to look for a cold solder joint somewhere in the unit

Peace,
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Old 04-26-2013, 02:57 PM #3
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Default Re: Blue 1w laser suddenly broken

thanks for the hints. i checked all connections erlier, i thnik it might be a cold solder joint. I´ll try to resolder allof them.

thx
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Old 04-26-2013, 03:12 PM #4
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Default Re: Blue 1w laser suddenly broken

Quote:
Originally Posted by numquamretro View Post
thanks for the hints. i checked all connections erlier, i thnik it might be a cold solder joint. I´ll try to resolder allof them.

thx
If you find a cold solder joint on the diode side of the driver, the power surge from the intermittent connection, may have blown the diode

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Old 04-26-2013, 05:11 PM #5
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Default Re: Blue 1w laser suddenly broken

okay... good to know.

Thank you!
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Old 05-16-2013, 05:06 AM #6
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Default Re: Blue 1w laser suddenly broken

Just to finish this thread up. It was a cold solder joint. I just resoldered all joints and now it works. Thanks @daugin!
And by the way it was open, i did a little podmod and added some cooling. First it drew 0.8A, now it draws 1,0A and does 900+mw instead of 700+ (measured).
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Old 05-16-2013, 05:16 AM #7
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Default Re: Blue 1w laser suddenly broken

Quote:
Originally Posted by numquamretro View Post
Just to finish this thread up. It was a cold solder joint. I just resoldered all joints and now it works. Thanks @daugin!
And by the way it was open, i did a little podmod and added some cooling. First it drew 0.8A, now it draws 1,0A and does 900+mw instead of 700+ (measured).
Be careful not to overdrive the diode, sometimes those specs are set to a certain point to make the laser last (like yours did) and maybe pushing it 200mw more will make it fail in a short time.
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Old 05-16-2013, 07:27 AM #8
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Default Re: Blue 1w laser suddenly broken

Quote:
Originally Posted by norbyx View Post
Be careful not to overdrive the diode, sometimes those specs are set to a certain point to make the laser last (like yours did) and maybe pushing it 200mw more will make it fail in a short time.
I know. But since i know how to use my lasers (not keeping them on for hours) i am sure it is in the range. In addition i improved the heat conduction.
And if it breaks, i dont care that much. It served for over 3 years now, so time has come to get a bigger blue anyways. 1W blue is nothing nowerdays.
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Old 05-16-2013, 09:33 AM #9
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Default Re: Blue 1w laser suddenly broken

Quote:
Originally Posted by numquamretro View Post
I know. But since i know how to use my lasers (not keeping them on for hours) i am sure it is in the range. In addition i improved the heat conduction.
And if it breaks, i dont care that much. It served for over 3 years now, so time has come to get a bigger blue anyways. 1W blue is nothing nowerdays.
Well I still consider a 1W laser to be a nice one. There are still people out there that have never seen one in real person. Anyhow good luck with yours, and thank god it was just a cold soldier joint, and you still got your laser to enjoy.
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