I have this CD Player
A very nice and scarce LUXMAN D-03 ( laser toshiba OPH-32 )
But out of order : It no longer recognizes the presence of CD discs.
Knowing that the laser is still shining, I think it is still alive and its problem is located on its servo card.
Unfortunately, as I do not have any technical document, and without schematic diagram, I am stopped to repair it.
If somebody have these or its service manual...
And infinitely grateful if you could help me.
I would be happy !!
Please, please
Thanks from France,
Raymond
Pardon me for my poor English
aymond
A very nice and scarce LUXMAN D-03 ( laser toshiba OPH-32 )
But out of order : It no longer recognizes the presence of CD discs.
Knowing that the laser is still shining, I think it is still alive and its problem is located on its servo card.
Unfortunately, as I do not have any technical document, and without schematic diagram, I am stopped to repair it.
If somebody have these or its service manual...
And infinitely grateful if you could help me.
I would be happy !!
Please, please
Thanks from France,
Raymond
Pardon me for my poor English
Hi! OPH32, and similar are four diodes photodetector array system, so, this sort of CD players are not the best for to read bad discs. This laser pickup doesn't have a good performance. That is a fact. The disc must be almost perfect or perfect for a correct play. And the main problem with OPH32 I've found is fungus in the lens. The problem is that if you want to clean the lens, all the lenses, you have to dismantle all the pieces, and then you have to adjust the servo and etc...
I have some OPH32 in the workbench for to try to repair and adjust. I've done some experiments, but it haven't been very well. The best cd with this kind of laser pickup is the Sony CDP-701es, but its performance stil very poor compared the CDP-101(six diode photoarray), for example.
Another thing you can do is to try to read the laser diode current consum following the service manual. It should be between 35ma.
Sorry if my information could not help more.
I have some OPH32 in the workbench for to try to repair and adjust. I've done some experiments, but it haven't been very well. The best cd with this kind of laser pickup is the Sony CDP-701es, but its performance stil very poor compared the CDP-101(six diode photoarray), for example.
Another thing you can do is to try to read the laser diode current consum following the service manual. It should be between 35ma.
Sorry if my information could not help more.
Thanks ManoloMos for your technical details concerning the OPH-32 laser.
But alas, these are the diagrams I would need,
In order to understand why it does not focus, and therefore it does not read CD.
Perhaps, I hope, one of You has its service manual ?
I would be infinitely grateful to him if he agreed to write me !
Raymond
But alas, these are the diagrams I would need,
In order to understand why it does not focus, and therefore it does not read CD.
Perhaps, I hope, one of You has its service manual ?
I would be infinitely grateful to him if he agreed to write me !
Raymond
Hi. I don't have service manual of this device. But maybe this link, from France, can help you.
https://vintage-audio-laser.com/A-l-atelier-page-15
https://vintage-audio-laser.com/A-l-atelier-page-15
Hello. I've done some experiments with some OPH laser pickups, and I must admit I'm a bit confused.
The first problem with this kind of laser pickup is the fungus deposited in the lens, the solution is clear: Clean it carefully.
Then, I've found a thing that is very rare, this is that some lasers, in spite it gives power without problem, the signal is very bad, 700uW for 300mVpp of RF, and when you change the laser diode with a new one, it gives 300mVpp of RF with only 200uW. Is this a symtom of ageing of the laser diode? I don't know.
There is another strange thing, and is that a new Mitsubishi diode ML4402, does not perform well, in spite, Sanyo SDL-3030 works well, both are new old stock.
Another issue, the circuit for to adjust laser pickup with OP-Amps, oscilloscope and etc... that I use, is not very useful for this kind of laser pickup, I haven't found the "trick" for to adjust it with the "adjust gig".
I've adjusted some OPH manually with the Sony CDP-701es, where the mechanism can be extracted for to manipulate the OPH laser pickup.
And... for all those who haven't experienced a CD player with OPH pickup, it a very early laser pickup with a single beam, that compared with a triple beam, its perform is very bad. The CD disc must be perfect if you want to hear the cd without problem.
I know that someone can ask the purpose of to try to repair a early cd, which perform is very bad and problematic, but this kind of CD player, teach a lot of how the CD player works, and this knowledge can be extrapolated to the modern models.
The first problem with this kind of laser pickup is the fungus deposited in the lens, the solution is clear: Clean it carefully.
Then, I've found a thing that is very rare, this is that some lasers, in spite it gives power without problem, the signal is very bad, 700uW for 300mVpp of RF, and when you change the laser diode with a new one, it gives 300mVpp of RF with only 200uW. Is this a symtom of ageing of the laser diode? I don't know.
There is another strange thing, and is that a new Mitsubishi diode ML4402, does not perform well, in spite, Sanyo SDL-3030 works well, both are new old stock.
Another issue, the circuit for to adjust laser pickup with OP-Amps, oscilloscope and etc... that I use, is not very useful for this kind of laser pickup, I haven't found the "trick" for to adjust it with the "adjust gig".
I've adjusted some OPH manually with the Sony CDP-701es, where the mechanism can be extracted for to manipulate the OPH laser pickup.
And... for all those who haven't experienced a CD player with OPH pickup, it a very early laser pickup with a single beam, that compared with a triple beam, its perform is very bad. The CD disc must be perfect if you want to hear the cd without problem.
I know that someone can ask the purpose of to try to repair a early cd, which perform is very bad and problematic, but this kind of CD player, teach a lot of how the CD player works, and this knowledge can be extrapolated to the modern models.