Are you sure you cleaned the laser well enough ? Nicotine is a pain in the a** to get rid off. You can see this if the laser has a yellowish colour instead of the usual blue colour. In the past I have seen some lasers that I thought were clean but after cleaning them thoroughly they did their job again.
Cleaning with water and a little soap is THE method for cleaning very dirty lenses.
Some ( but certainly not all ) producers of cdplayers recommend the water-only method. Please check your service manuals for this information if you want to be sure. Few laser-coatings accept alcohol for cleaning. By the time you discover that they don't you can buy a new one whereas the water method is always safe.
Unfortunately the water-only method doesn't work with nicotine and other sticky dirt.
Some ( but certainly not all ) producers of cdplayers recommend the water-only method. Please check your service manuals for this information if you want to be sure. Few laser-coatings accept alcohol for cleaning. By the time you discover that they don't you can buy a new one whereas the water method is always safe.
Unfortunately the water-only method doesn't work with nicotine and other sticky dirt.
That seems like a clean laser to me. Hmmm, that will be the end for the player I think. When you wreck it for parts please pay attention to the mains-transformer. Thoses oldies normally had separate secondary windings. Most of the time 2 x 7 V and 2 x 15 V, ideal for a DIY DAC with discrete/opamp output stage. It probably has a 240 V primary too.
Bricolo said:
Hi, Bricolo
If you can't find someone with a scope who can do proper measurement on that player, I'm afraid we wont get a step further solving the real problem.
After all is said and done, IMO this laser is end-of-life.
As Jean-Paul said, you can't change the laser anymore, and if you could, it would be more expensive than a new player in that category.
Never mind, there are a lot of good working players out there.
/Hugo - thinks one day Bricolo will find his dream-player
Netlist said:
Hi, Bricolo
If you can't find someone with a scope who can do proper measurement on that player, I'm afraid we wont get a step further solving the real problem.
After all is said and done, IMO this laser is end-of-life.
As Jean-Paul said, you can't change the laser anymore, and if you could, it would be more expensive than a new player in that category.
Never mind, there are a lot of good working players out there.
/Hugo - thinks one day Bricolo will find his dream-player
And what should I measure with a scope? If I find one
And how can a dead laser be able to read the cd?
I still thinks it's the system that places the laser at it's position that is dead or not precise enough
Dead or near-dead lasers behave that way, Bricolo. Sometimes they can read TOC but skip. Nevertheless end of life. There is a small chance you can adjust some things and maybe it will behave a little better for a while.
But then you need an oscilloscope and even if you can arrange one: will it pay off at the end ? It still is a very old Sony that doesn't sound that good.
But then you need an oscilloscope and even if you can arrange one: will it pay off at the end ? It still is a very old Sony that doesn't sound that good.
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