Oscilloscope Question

[Platinum]

So I've got 7 sega saturns that do not read discs, a couple of PS2s that don't, three Sega CD's that do not read, and one Dreamcast that does not read discs. I already know how to blindly adjust the potentiometer but I cannot stand that process.

I am looking to buy an oscilloscope to adjust the lasers. I have a few questions hopefully somebody can answer my questions.

1- What kind of oscilloscope should I buy?
2- What should I be looking for when adjusting the laser with it?
3- Just for accuracy, is there any videos on this? I've checked youtube and saw nothing.

Thanks everybody, much appreciated!

[DogP]

1. I'd personally go with an analog scope, 20MHz or higher (I prefer Tektronix, but any brand would probably be fine). A good used one shouldn't be too expensive. Digital scopes are nice, especially since they're small and pretty portable, but for this kinda thing, I prefer my analog scope.

2. You're looking for a good eye pattern.

3. Not sure, but this link should have the info you need: http://secondchancecritic.com/freestuff/ps2repairguide/ .

DogP