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Bose laser-more info

So I took apart the case of the Bose so I could clean and lube the laser assembly. Also used some canned blow off gas to blow any dust out of the area between the laser and the underside of the lens. After reassembly the player worked beautifully. The one particular CD played right off the bat. But after swapping it or another CD, which also played, and then putting the stubborn CD back in, it refused to play. I noticed that when blowing out the laser assembly the lens would move down because of the pressurized gas blowing between the lens and laser. So I pressed down on the lens and tried the CD again. Worked great. After stopping the player and re starting the CD wouldn't play. Pressing down the lens carrier on the left hand side of the lens carrier and then trying to play the CD works. After stopping and then starting the CD won't play. But then pressing down the lens carrier on the left side makes the CD play again. Anybody have any guesses why this is happening? It looks to me like the lens carrier is just suspended by 4 spring wires. But maybe there is something else that might be dragging. Anybody know how the things are really made? Thanks, Eric

Reply to
etpm
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There are two simple solutions:

  1. A record player with a good cartridge and needle (stylus).

  1. A MP3 player.

If you really are madly in love with CDs, just buy a cheap external CD player and plug it into the AUX input. My experience with CD players is this: When they die, they are dead forever..... There is no one on earth who can fix em'. (Probably why they are becoming obsolete).

If however it's just that one CD that is causing problems, REPLACE the CD.

Reply to
oldschool

Your obviously very LIMITED experience.

Reply to
Terry Schwartz

snipped-for-privacy@whidbey.com prodded the keyboard with:

Look for debris between the lens carriage and the magnet on the side that is sticking, or the suspension is twisted and its rubbing.

--
Best Regards: 
                      Baron.
Reply to
Baron

  1. You can't play a CD on a record player, no matter how good the cartdrige and needle are.
  2. That should be AN MP3 player, not A MP3 player.

Since this group is aimed at repairing electronics I fail to see how buying a new CD player will repair the one I have now.

The CD is not the problem, but is a possible diagnostic clue. Eric

Reply to
etpm

I'll check for debris with a magnifier, thanks. Am I correct in assuming that the lens assembly is only supported by the 4 wires? That there are no other suspension components that could be getting stuck? Eric

Reply to
etpm

The lens/laser/sensor assembly is mounted on a veritcal slide and a focusing servo runs it up and down until it gets the signal from the disc. It sounds like the slide mechanism is sticking, if of that design. If totally suspended by springs, and no vertical slide mechanism, there may be dirt, or maybe the air blast bent the springs a bit. Anyway, it definitely sounds like the focus mechanism is sticking, so see if you can find out why that is happening.

Jon

Reply to
Jon Elson

snipped-for-privacy@whidbey.com prodded the keyboard with:

If you look carefully, you will see that not only does the lens move up/down, but also from side to side. You can get tiny fractures in the parts securing the wires. So it is possible that one side twists slightly and rubs.

--
Best Regards: 
                      Baron.
Reply to
Baron

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