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How to dismantle this 7 Watt eBay laser pointer head completely?

R

rajhlinux

Member
Joined
Dec 26, 2020
Messages
79
Points
8
Hello,

I've bought an eBay 7 watt Nicha laser pointer, never used it for more than 5 mins. I never let the batteries stay inside unless I use the laser pointer. No modifications to it, never dropped it. The picture is provided below.

Now all of a sudden this laser pointer doesn't turn on and I'm trying to figure out how I can dismantle the laser head and can't understand how to take it apart.
I would like some advice on how it can be dismantled and troubleshoot if the 7 watt Nichia laser diode is burnt or not.

Thanks.

IMG_6462_2.JPG

IMG_6465.jpg

IMG_6464.jpg


Edit:

Alright, I managed to take it apart.
The finned heat sinks are super glued on top of one another.

IMG_6469.jpg

IMG_6470.jpg

IMG_6476.jpg

IMG_6477.jpg

IMG_6478.jpg

IMG_6479.jpg

IMG_6480.jpg

Now I need to test the diode to see if it burnt or not. Maybe the laser driver circuit is damaged?...
Any advice on testing?
 
Last edited:





Shmackitup said:
Have you tried contacting the person you bought it from? ;)
Click to expand...
Lol!
That is your build;)
rajhlinux said:
Hello,

I've bought an eBay 7 watt Nicha laser pointer, never used it for more than 5 mins. I never let the batteries stay inside unless I use the laser pointer. No modifications to it, never dropped it. The picture is provided below.

Now all of a sudden this laser pointer doesn't turn on and I'm trying to figure out how I can dismantle the laser head and can't understand how to take it apart.
I would like some advice on how it can be dismantled and troubleshoot if the 7 watt Nichia laser diode is burnt or not.

Thanks.

View attachment 78759

View attachment 78760

View attachment 78761

View attachment 78762
Click to expand...
raj.
The obvious is checking the batterys for a full charge.
Did you put the batterys in backwords?
Check the tail cap switch?
The 5 minutes that you did run it, was it 5 minutes straight?
 
Shmackitup,
is that you wearing your shirt with your store's logo?
 
GSS said:
Lol!
That is your build;)

raj.
The obvious is checking the batterys for a full charge.
Did you put the batterys in backwords?
Check the tail cap switch?
The 5 minutes that you did run it, was it 5 minutes straight?
Click to expand...

Thanks for the reply.

Batteries are fully charged, Samsung INR18650 HLGL028ELB Lithium ion.
I never put the batteries backwards.
The tail cap switch works fine, I checked it using a continuity on a DMM.
I've never ran this more than 40 seconds straight and I bought it like 3 years ago and total usage was never over 5 minutes.
How do I check the 7 Watt Nichia laser diode if its working, do I need to desolder the driver circuit board?
 
Last edited:
Just hit up @Shmackitup I'm sure he'll fix it.

Edit: nevermind, you completely tore it apart I'm sure he'll sell you the replacement parts though!
 
Last edited:
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Reactions: GSS
rajhlinux said:
Hello,

I've bought an eBay 7 watt Nicha laser pointer, never used it for more than 5 mins. I never let the batteries stay inside unless I use the laser pointer. No modifications to it, never dropped it. The picture is provided below.

Now all of a sudden this laser pointer doesn't turn on and I'm trying to figure out how I can dismantle the laser head and can't understand how to take it apart.
I would like some advice on how it can be dismantled and troubleshoot if the 7 watt Nichia laser diode is burnt or not.

Thanks.

View attachment 78759

View attachment 78760

View attachment 78773


Edit:

Alright, I managed to take it apart.
The finned heat sinks are super glued on top of one another.

View attachment 78774

View attachment 78772

View attachment 78770

View attachment 78769

View attachment 78768

View attachment 78767

View attachment 78766

Now I need to test the diode to see if it burnt or not. Maybe the laser driver circuit is damaged?...
Any advice on testing?
Click to expand...
Shmackitup,
Thats some nice and tidy work. Wires are nicely insolated with shrink wrap and added compound for strength.

Thermal paste where needed and not alot wire bunched in. Good choice of heatsinks added together.
I'm impressed.

raj,
with you dismantling this laser so much I can't see Smackitup repairing it for free or any small price. I don't know what his warrantee covers are though.
 
Last edited:
The P4K driver is 4.5A or 5A, there are two models of this driver, one single mode plus two hidden modes
And one six-mode multi-function model.
 
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Reactions: GSS
Original as a technique to get a discount on a new pointer or spare parts for it.
Today we are faced with a world full of scams and tricks, Amazon is suffering from everything and more,
As I believe everything that is online, especially e-commerce.
 
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