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Continuation of problems with Duo 2SE
Continuation of problems with Duo 2SE –
Ok, I've got this V4 PS2 here with a Duo 2SE in it. I bought a reconditioned laser for it and now DVDs boot great. The DVD Pot is set to about 750 (kinda low, but it works. Shipped with it at 850). The CD pot shipped w/ 1096. I now have it at about 950. The CDs will not boot and sound very odd when trying to boot. I do not know if I have the angle of the laser correct (The screw on the rod), but seeing as it works perfectly for DVDs, I think it should probably be good.
Should I try going down to 850 with the CD Pot? Lower? What's the lowest I should go.
Update: lowered CD pot to 840. It will now read my black PSX disc, but it does not read the burned CD-Rs fast enough for the Duo 2 to boot them.
Also, while playing the PSX disc, it sounds very loud (don't know if it's the laser or what but it's a constant moving noise) and every so often it will click, stop reading, and then pick up again.
When trying to read a CD-R, the laser sounds like an old car trying to start.
Reconditioned lasers depending where you buy them could be someone's laser from a v1-3. =)
I don't understand how the chip would be the problem? When you proved that it's booting psx original when you tweaked the pots. Sounds more like a laser issue.
Yes, i need to get the laser to read the disc before the Duo 2 craps out (when it gets to the PS2 browser)..
Any recommendations for the laser alignment? Go lower than 830 on the CD pot?
Ok, finally got it going at 620. At 760 it was reading my better quality CD-Rs, but now it reads my crappy ones too.
Thanks for all the help in the previous thread.
Every PS2 is unique, some have low settings, others high and others avaerage settings. You will never come across two identical magic settings. Remember all comonents have there allowance for not being percise ( eg. resistors can be 1%, 5%, 10% or 20% off dependant on usage )
So with this information a 10 K resistor could range from 8k to 12k while someone else's could be running at 9.9k to 10.1k.
Now daisy chain thsi will all compenents that go up to the laser and you will see tolerances will be difference on all.
But basic guidlines should get you by for adjusting.
ALthough the speculation is to not exceed 20% the initial settings otherwise can cause pre-burn-out-laseer syndrome.