
Originally Posted by
één of andere kerel
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The PlayStation 2 suffers from dust and lubrication problems.
Sony didn’t use enough lube on the traverse pickup sleds and the kicker mechanism to keep it running right. (Although, you never want to use too much lube as that causes problems of its own.) The lube that’s on there dries up from the dust exposure and causes the bearings to bind on the sleds, which is why you can have a buzzing PS-2 when reading blue-bottom discs while it may work normally for DVD discs. Unlike DVD-ROM, CD-ROM discs require a faster mechanical response from the kicker mechanism to move the pickup back and forth rapidly to assure a fast read. When the PS-2 tries to seek a blue-bottom disc, it tries to move the pickup back and forth on the sled rapidly, but hangs up in the whole process instead because of the bind between the bearings and the sleds due to lack of lubrication, inhibiting free movement. The buzzing noise is caused when the teeth of the rack gear on the pickup jumps over the grooves it was in and then snaps back down on the next set of grooves on the worm gear over and over again.
The best fix is to clean out the PS-2 of all dust and then relubricate the aforementioned mechanical components with high quality bearing oil and molytone grease. What I do to help keep lube on the sleds and bearing is mix 1/3 bearing oil with 2/3 molytone, which creates a loose grease which provides a good lube that stays on the bearings. If you can’t find molytone grease, white lithium grease can be used as a substitute. For the oil, use only a quality household oil or bearing oil; never use stuff like WD-40 as it’s not viscous enough to be effective and most of the liquid will evaporate after a few days, bringing the problem back to square one.
Anyways, in addition to using the dilluted lube on the bearing and sleds, I use the same stuff on the worm gear as well. I use just enough to form a very thin film of lube on the sleds, but it’s very important not to use too much lube as the excess can drip around and cause problems.
I work the lube in by moving the pickup back and forth in the traverse sled path a couple of times, BUT (AND THIS IS A VERY IMPORTANT WARNING HERE) you should do this when the traverse is elevated up in its closed position! Moving the pickup back and forth while it is tilted down can damage the pickup! Underneath the pickup is a part of the mainboard shielding, which has a sharp edge. The ribbon harness on the pickup itself, which provides the circuit connections to all parts within the pickup, can be severed by this sharp edge, which will disable the pickup and may be difficult, if not impractical, to repair once this damage has occured.
After the lube job is done and the objective lens is cleaned using medical isopropyl alcohol and a Q-tip swab followed by a brief airblast to the lens to blow away any cotton debris left behind, test it and see what happens!