Hi there i have a small problem. I have a CD/MP3/VCD player, everything was ok till one day when the Anti-shock disappeared. I went to my friend who sad that it just needs to be attuned, there is a diode(in form of a screw,at the back of the lens,that can be rotated).He attuned it for several hours and now the lens can't focus, on that diode are some signs(like 2,6, and an arrow, access my web page where i wrote a better description)
Thx. for help
You can't just start tweaking adjustments & expect it to work. You will need to do an alignment with the proper test equipment.
No, you _had_ a small problem, now you _have_ a big problem! 8*)
Was it still playing OK after the Anti-shock disappeared?
Playing with the physical calibration of a system like that is just asking for trouble. While a factory authorized service place _might_ be able to re-tune it (for a fairly large chunk of change), it's also likely that your friend broke something while mucking about.
I'd have tried cleaning the lens first, and then thrown it away if that didn't help. Too many things nowadays are more expensive to repair than replace...
Please define 'anti-shock disappeared. Are you saying it became sensitive to vibration or shock? That 'diode screw' was probably the laser power adjustment or worse one of the alignment settings.
If it's not working at all now, it's either way out of alignment or the laser power is too far off, or the laser diode is damaged by too much power. None of this is fixable without proper tools like an o-scope.
-Chris
I'd have started with the obvious things like cleaning the lens and track. If all else failed, I'd mark the adjustments before tweaking the laser power up a hair. Failing that, I'd start turning everything just before I took a sledge hammer to the remains. :}
-Chris
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