Hello friends
I have three units of this beautiful CD player. It is a top model of Technics range: separate audio and digital transformers, with separate sources, first level mechanics and self-adjusting pick-up ... only 2 adjustments are necessary when replacing the laser pick-up. Magnetic displacement, similar to the KSS-151A.
Solid and good functioning.
Now I want to go a little further with these units, and I was wondering what would be the most recommended mods, I assume a new clock, and a replacement of capacitors ... but what more mods, would be recommended?
I have three units of this beautiful CD player. It is a top model of Technics range: separate audio and digital transformers, with separate sources, first level mechanics and self-adjusting pick-up ... only 2 adjustments are necessary when replacing the laser pick-up. Magnetic displacement, similar to the KSS-151A.
Solid and good functioning.
Now I want to go a little further with these units, and I was wondering what would be the most recommended mods, I assume a new clock, and a replacement of capacitors ... but what more mods, would be recommended?
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As you say, clock and replace caps. That will give improvements.
Using bitumen sheets for dampening is worthy.
Better feet can give improvements.
Some good polyester capacitors are worth looking into also as well as a quality power cord
I would do all this and go from there. It depends how far you want to go with it. Uploading schematics may get you some more guidance
Have fun! Interesting to see how you get on
Using bitumen sheets for dampening is worthy.
Better feet can give improvements.
Some good polyester capacitors are worth looking into also as well as a quality power cord
I would do all this and go from there. It depends how far you want to go with it. Uploading schematics may get you some more guidance
Have fun! Interesting to see how you get on
Technics-SL-PS-900-Service-Manual and schematic is here, download PDF
Technics Service Manuals Free | Technics Free Owners Manuals, Page 4
Technics Service Manuals Free | Technics Free Owners Manuals, Page 4
Judging from the original specs, Technics consistent quality level, and longtime high reputation, I don't see really anything that needs "improvement".
General maintenance perhaps, is all those things might benefit from.
As "picky" as I am, I certainly don't think I'm better than Technics at making equipment.
General maintenance perhaps, is all those things might benefit from.
As "picky" as I am, I certainly don't think I'm better than Technics at making equipment.
Thank you all,
This model, I do not know what improvement potential in the end will have, but it looks solid, complete, with separate power supplies for audio and mechanics, and has a solid mechanics with an extremely quiet and smooth operation.
I have the original service manual on paper, and I appreciate being able to download it in pdf.
The first thing is to change or maintain the big capacitors (C53 & C54) of the power supply, the original ones are 3300uf / 63V, and I'm thinking of replacing them with mundorf 10.000uf / 40V, but maybe the jump is too big, for the transformer and I should stay at an intermediate value of 4700uf
This model, I do not know what improvement potential in the end will have, but it looks solid, complete, with separate power supplies for audio and mechanics, and has a solid mechanics with an extremely quiet and smooth operation.
I have the original service manual on paper, and I appreciate being able to download it in pdf.
The first thing is to change or maintain the big capacitors (C53 & C54) of the power supply, the original ones are 3300uf / 63V, and I'm thinking of replacing them with mundorf 10.000uf / 40V, but maybe the jump is too big, for the transformer and I should stay at an intermediate value of 4700uf
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I would not go down in voltage, I'd rather go up to give more headroom. 4700uF 63v / 100v will be better.
10000uF is too much IMHO
10000uF is too much IMHO
You could well be correct. If the rail is lower than 40v it should be OK.
I just have a feeling they designed it with 63v for a reason
I just have a feeling they designed it with 63v for a reason
Panasonic FR are better. I've tested these against FM and Rubycon low impedance ones with greater results.
The ESR is lower than any I've seen. Highly recommend Panasonic FR for PSUs
The ESR is lower than any I've seen. Highly recommend Panasonic FR for PSUs
Those Technics branded capacitors - I would not mess with them.
They are of high quality - made by Panasonic to their strict specifications.
No need to "upgrade them".
You're dealing with a piece of equipment that Technics has already fine-tuned in the laboratory.
Hello wiseoldtech,
I am with you in that they are of high quality, but I am certain that they are 30 years old, and they are chemical ... they do not improve with age
I am with you in that they are of high quality, but I am certain that they are 30 years old, and they are chemical ... they do not improve with age
One month the capacitors have been slow to arrive and only one afternoon in installing them. A great improvement in the sound, it is as if a veil had been removed, and now we can see.
It is not subjective, it is a fact because I have compared with another unit without modifying, now there will be two units updated.
I have changed all operational (SMD) by LM4562, another good improvement.
It is not subjective, it is a fact because I have compared with another unit without modifying, now there will be two units updated.
I have changed all operational (SMD) by LM4562, another good improvement.
Hi, how are you getting on?
With all due respect as I feel you will of improved things please bare in mind it's a fact only against the other equipment you have, it all depends on the value decline of the equipment your comparing it too.
I believe its always best to do what you have done and many prefer to keep things original while not caring about improvements, it's good for them as it's DIY by all means
With all due respect as I feel you will of improved things please bare in mind it's a fact only against the other equipment you have, it all depends on the value decline of the equipment your comparing it too.
I believe its always best to do what you have done and many prefer to keep things original while not caring about improvements, it's good for them as it's DIY by all means
I have been replacing some power capacitors in the PCB audio, in general the capacitors were in good condition, and with the capacity intact, so I think it is better to add some of the decoupling. I have been riding Panasonic FC and Elna Silmic II. I have also replaced the operational ones by LT072, for my taste it is better than NE5532 to my ears. It has retired like a veil in the audio, and has won in definition.
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Fantastic work. I feel you've made good choices and I'd use the same components as I've had good success with them.
Anymore plans in mind?
Anymore plans in mind?