Old 03-07-2015, 08:26 AM #1
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Unhappy Which part to replace after battery inversion?

Hi all,

I have been using my Sci-Fi 501B 445nm 1475mw laser for a while. However, in a flurry of excitement I inserted the batteries in the wrong way. Now, there is no guarantee on the product so I am wondering which parts I must replace? Is it only the driver or is the diode also dead?


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Old 03-07-2015, 08:58 AM #2
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Default Re: Which part to replace after battery inversion?

It is usually the driver, that would be an M140 build so there is a good chance it's using an X-drive, an X-drive will last a few seconds and burns out the driver and not the diode. Does the driver look like this? https://sites.google.com/site/dtrlpf...drives/x-drive If it's using this driver then it will be soldered directly to the pins on the diode, look at that chip with 8 connections with a magnifying glass, there may be a burn mark in one corner of that chip if it's burned out. If you have the proper equipment and tools you can test both the driver and diode, but don't attempt this if you don't know what your doing or you will need to replace both of them.

Alan
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Old 03-07-2015, 09:58 AM #3
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Default Re: Which part to replace after battery inversion?

Quote:
Originally Posted by Pi R Squared View Post
It is usually the driver, that would be an M140 build so there is a good chance it's using an X-drive, an X-drive will last a few seconds and burns out the driver and not the diode. Does the driver look like this? https://sites.google.com/site/dtrlpf...drives/x-drive If it's using this driver then it will be soldered directly to the pins on the diode, look at that chip with 8 connections with a magnifying glass, there may be a burn mark in one corner of that chip if it's burned out. If you have the proper equipment and tools you can test both the driver and diode, but don't attempt this if you don't know what your doing or you will need to replace both of them.

Alan
Thanks for the reply Alan,

I will first have to remove the connection board which is glued into place correct?
There is also a small hole in the heatsink with a tiny hex socket (I assume) in it. I am not sure what to remove in order to gain access to the inside.
Furthermore, I lack specific equipment for this job! Only have a 'normal' soldering iron.

See pictures:
Attached Thumbnails
Which part to replace after battery inversion?-imag1585.jpg   Which part to replace after battery inversion?-imag1584.jpg  

Last edited by olivierhacking; 03-07-2015 at 09:59 AM.
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Old 03-07-2015, 10:08 AM #4
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Default Re: Which part to replace after battery inversion?

Quote:
Originally Posted by olivierhacking View Post
Thanks for the reply Alan,

I will first have to remove the connection board which is glued into place correct?
There is also a small hole in the heatsink with a tiny hex socket (I assume) in it. I am not sure what to remove in order to gain access to the inside.
Furthermore, I lack specific equipment for this job! Only have a 'normal' soldering iron.

See pictures:
No you shouldn't need to remove the battery contact board. You should just need to find the correct size Allen wrench that fits the set screw in that tiny hole in the heat sink, then just unscrew it and the module should slide out, it will have wires that are soldered to wires from the battery contact board.

Alan
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M462 462nm one of a kind (in progress)
PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
Radiant Electronics X4 3.7W Laser Power Meter


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Old 03-07-2015, 10:39 AM #5
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Default Re: Which part to replace after battery inversion?

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Originally Posted by Pi R Squared View Post
No you shouldn't need to remove the battery contact board. You should just need to find the correct size Allen wrench that fits the set screw in that tiny hole in the heat sink, then just unscrew it and the module should slide out, it will have wires that are soldered to wires from the battery contact board.

Alan
Ok, so I was able to remove it but there is no movement whatsoever. Pulling with force, tapping the heatsink all didn't work. The copper piece is really stuck inside. I also removed the focusing mechanism and spring, now you can see how tight the copper is on the aluminium.
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Which part to replace after battery inversion?-imag1586.jpg  

Last edited by olivierhacking; 03-07-2015 at 10:40 AM.
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Old 03-07-2015, 11:01 AM #6
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Default Re: Which part to replace after battery inversion?

Quote:
Originally Posted by olivierhacking View Post
Ok, so I was able to remove it but there is no movement whatsoever. Pulling with force, tapping the heatsink all didn't work. The copper piece is really stuck inside. I also removed the focusing mechanism and spring, now you can see how tight the copper is on the aluminium.
This isn't good, it could be glued in place with thermal adhesive. Not a good practice in my opinion because it's mostly permanent, it might not be possible to get it apart. Now I don't know what to suggest. Sorry.

Alan
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PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
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Old 03-07-2015, 11:16 AM #7
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Default Re: Which part to replace after battery inversion?

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Originally Posted by Pi R Squared View Post
This isn't good, it could be glued in place with thermal adhesive. Not a good practice in my opinion because it's mostly permanent, it might not be possible to get it apart. Now I don't know what to suggest. Sorry.

Alan
Ah, that's annoying

Thank you anway for your help. I will try contact the maker of the laser again and see if he will reply this time.
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Old 03-07-2015, 11:27 AM #8
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Default Re: Which part to replace after battery inversion?

The module is not glued. It is being pressed into the heatsink so it will not move and adding a set screw on the side for securing it even better.

You will need to take the driver out. Then use a press or something to take it out. I would just leave it there. And just replace the driver.

I was a bit busy so could not respond.

I would suggest getting a new driver. I can send one for free if needed.

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Old 03-07-2015, 11:29 AM #9
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Default Re: Which part to replace after battery inversion?

Quote:
Originally Posted by Pi R Squared View Post
This isn't good, it could be glued in place with thermal adhesive. Not a good practice in my opinion because it's mostly permanent, it might not be possible to get it apart. Now I don't know what to suggest. Sorry.

Alan
Oh my... I tried once again and it finally came loose but I ripped the wires loose!!
There was no other way of getting it out sadly. Any ideas on what to do now?
Edit: Thejoker301 and I are working on it together.
Attached Thumbnails
Which part to replace after battery inversion?-imag1589.jpg   Which part to replace after battery inversion?-imag1587.jpg  

Last edited by olivierhacking; 03-07-2015 at 11:38 AM.
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