Help with removing PCB board and ribbon from diode

[ska8r411]

So im attempting to install the new diode in my blue ray and Iv got some questions.

I no that you are supposed to remove the PCB board along with the ribbon,and use a large drop of solder,well are the pins onthe diode fragile?

They wont melt or snap off when I do this right?


Thanks!

 

[daguin]

Re: Help with removing PCB board and ribbon from d

So im attempting to install the new diode in my blue ray and Iv got some questions.
I no that you are supposed to remove the PCB board along with the ribbon,and use a large drop of solder,well are the pins onthe diode fragile?
They wont melt or snap off when I do this right?
Thanks!

It is possible to bend or break them, but they won't melt. You can melt the insulator in the diode body, but by the time you've gotten it that hot, the diode would probably already be toast anyway. One of the main things to keep in mind is that diodes are only "rated" for about three seconds of soldering heat. Practice soldering on other stuff until you are confident with your speed and skillz.


I just wrote this up for someone in PM.

I clamp my "extra hands" to the desk. I tighten the arms down pretty tight. I use a very small pointy pair of needle nose pliers to slightly lift the PCB and ribbon cable from the side where the PCB sticks out more. I get a dallop of solder on my iron, grasp the PCB and ribbon cable with the pliers put the solder onto the pins, hold the iron to the blob and begin to lift gently with the pliers. Sometimes it comes off clean. Other times it doesn't come off very well. I don't go after it again if it doesn't work completely. It has always worked at least part way. If it doesn't come off cleanly, I then go after it with a pair of fine snips and the point of a small knife blade to finish the job. If the whole dallop of solder stays on the pins, I use a solder sucking tool to remove it first.

Peace,
dave

 

[lasersbee]

Re: Help with removing PCB board and ribbon from d

No the Pins won't melt but they are fragile and the LD is sensitive to
overheating.

This is the way I remove the PCB from an 803T.... (or any LD)
You will need...

1) a clean 20-40 watt Soldering Iron with a pre-tinned small tip
2) rosin core solder ( it supplies the correct amount of flux to the joint)
3) a "SlodaPullt" (vacuum solder sucker)
4) small vise

Secure the LD in the vise with the pins facing up (don't crush it)...
Using the Soldering Iron and solder.... Quickly... solder a blob of solder
(just enough to solder all the pins together with the blob)
Do this quickly as to not heat up the LD too much...
Now wait a few minutes to let it cool down...

Once the LD has cooled... prepare your Soldapullt to suck some solder...
and again... quickly heat up the solder blob... and as soon as it is in
a liquid state... remove the soldering iron and suck the blob off of
the PCB with the Soldapullt.

The PCB should now be free of the solder that was holding it to the
pins... you can use a small tool (I use an X-acto knife) to gently wiggle
the PCB off the pins..

Jerry

[Edit] Damn... took me 15 minutes to write this...

 

[ska8r411]

Re: Help with removing PCB board and ribbon from d

Thanks both of you for helping me.

Ill report back with how it went!

 

[john_lawson]

Re: Help with removing PCB board and ribbon from d

I just wrote this up for someone in PM.  

I clamp my "extra hands" to the desk.  I tighten the arms down pretty tight.  I use a very small pointy pair of needle nose pliers to slightly lift the PCB and ribbon cable from the side where the PCB sticks out more.  I get a dallop of solder on my iron, grasp the PCB and ribbon cable with the pliers put the solder onto the pins, hold the iron to the blob and begin to lift gently with the pliers.  Sometimes it comes off clean.  Other times it doesn't come off very well.  I don't go after it again if it doesn't work completely.  It has always worked at least part way.  If it doesn't come off cleanly, I then go after it with a pair of fine snips and the point of a small knife blade to finish the job.  If the whole dallop of solder stays on the pins, I use a solder sucking tool to remove it first.

Peace,
dave [/quote]

Thanks dave i admit it i always ask for help and Dave has great advice

oh yea daguin and ace82 convinced me to build my first lasers

 

[daguin]

Re: Help with removing PCB board and ribbon from d

[Edit] Damn... took me 15 minutes to write this...

This is one of the things that many NOOB's don't understand. They want us to just write down what we do. I just wrote out instructions on how to remove the module from a customized violet Leadlight and how to gain access to the driver inside the module. I have almost 45 minutes in writing and rewriting just to do that!

Then they get upset with us when we just say, "Read and learn, my young Padawan." Everything I wrote is already in this forum in one place or another. If it wasn't a customer, I probably would have just suggested a more thorough read of the forum.

Peace,
dave

 

[ska8r411]

Re: Help with removing PCB board and ribbon from d

well bad news,some how i managed to break the lens on the diode, :'( :'(so im just gonna buy a new one and ship it to daguin and have him install a new one.

 

[rog8811]

Re: Help with removing PCB board and ribbon from d

A broken LD window is not the end of the world, as long as the shards of glass can be tapped out of the can you may still be able to use it. I had one where half the glass was still in place, as I turned the LD it moved across and ruined the beam, I carefully broke out as much as I could with a jewelers screwdriver, then I used a cocktail stick with a small dob of superglue and stuck the remaining part out of the way.  It is worth a try, all it will cost you is a few minutes of your time.

Regards rog8811

 

[lasersbee]

Re: Help with removing PCB board and ribbon from d

[quote author=lasersbee link=1232834611/0#2 date=1232835947]
[Edit] Damn... took me 15 minutes to write this...

This is one of the things that many NOOB's don't understand.  They want us to just write down what we do.  I just wrote out instructions on how to remove the module from a customized violet Leadlight and how to gain access to the driver inside the module.  I have almost 45 minutes in writing and rewriting just to do that!

Then they get upset with us when we just say, "Read and learn, my young Padawan."  Everything I wrote is already in this forum in one place or another.  If it wasn't a customer, I probably would have just suggested a more thorough read of the forum.

Peace,
dave[/quote]

I hear you Dave..... that's my normal response as well to noob's...
(if I've seen it somewhere on the Forum posts... )

Jerry

 

[rog8811]

Re: Help with removing PCB board and ribbon from d

It would be nice to keep a database of my posts, all catagorised for easy access, so i can instantly post a response....I want a counter on it so that everyone can see how many times the info has been posted.

Regards rog8811

 

[Bionic-Badger]

Re: Help with removing PCB board and ribbon from d

I have my helping hands gripping the heatsink (still attached to diode), and then hold the PCB with some pliers. I lift up the diode + helping hands using the pliers, heat up the PCB board connections with some solder, and let the weight of the helping hands yank the diode from the PCB board. If you do it right the pins are left nice and clean.

I've never detected damage to the diode. The fact that the PCB detaches as soon as the solder is melted means the pins are only heated a minimum amount of time too.