QUOTE(sinclairuser @ Apr 30 2012, 09:56 PM)
pot tweaking is at best a way to diagnose worn lasers nothing more
its not a permanent repair if tuning the pot up makes the drive read disks you should then turn it back down to 3 and order a new laser then starting at 3 on the new laser turn up till it reads following the right tut for your drive i have not provided a link as they are easy to find
turning a pot up and leaving will only burn out the laser
Well I have a jtag that I pot tweaked 2+ years ago and it still works fine today. As a no cost solution, it works well and at least if it doesn't work forever, they know immediately what part they'll need to replace.
Why would they have to turn the pot back down on the old laser if they are replacing the whole laser? That pot adjustment would disappear as soon as they took the laser out of the drive. And the new laser would come with its own pot adjustment.
Also, many lasers come off the assembly line not being tweaked to their full potential. Think of two lasers that were worn the same amount, one was tweaked right when it was manufactured, the other not. And one might still work while the other doesn't because it wasn't tweaked right from the start.