Mod CDP SONY 950

[dovuhoang]

Hi every one,

I am the new member of this forum. I am using the Sony 950 CDP and i want to upgrade its capacitors.



On this main board, i saw 1 big yellow capacitor, name SB, 47000 mdf and 5.5V,
Can anyone tell me this capacitor use for which section? power supply or what. and what is this brand name. and or can i replace this and which will be the best for replacement? there are 02 ELNA 4700mdf and 16V, are they good or have other better for replacement?

Thanks for your help.

Otherwise, can u tell me which part can i upgrade for this CD, cause i really love DIY but lack of knowledge in electronics. I can do simple things.

Once again thanks for forum for DIY lover can share the knowledge and experience.
Hope to have yours replies soon.

[Mooly]

Can't tell much from that picture You need to find a service manual and circuit diagram.

47000/5.5v sounds a strange value. Post a close up picture of it. Are you sure it's not a "super cap" used in place of nicad/ni-mh battery to maintain standby/memory settings. Unusual though in a CD player.

You might be better looking at the analogue output stages for any possible upgrades and mods but without more info it's hard to advise.

[dovuhoang]

Sorry, i just have taken the closed up photos of this:

http://www.mediafire.com/imgbnc.php/...dad0a0996g.jpg

http://www.mediafire.com/imgbnc.php/...1abee2476g.jpg

http://www.mediafire.com/imgbnc.php/...f9f45dcf6g.jpg

[dovuhoang]

Thanks Mooly for your early helps,

Sorry, i just have the close up photos


















Please help me again man,

Thanks.

[dovuhoang]

I have upgraded the input AC wire with a cooper 6mm fibre wire, make sound more detail and soundstage improved.

Although, the bass is not so good, cause it a little bit strong and not deep enough.

Although i made modification to the speaker crossover.

[Mooly]

Thanks for the pics.
The yellow cap has to be for system backup/memory retention. Similar thing to these. It has no effect on audio performance.
2 NCC 5.5V 4.7mF 4700UF SB Memory Backup Capacitor | eBay

I think there is at least one (that I can see) 5532 type opamp... are there more ?
Replacing these may well give the most change in subjective performance. I would suggest something like the OPA2604, the OPA2132 or the LM4562. All will sound different... the OPA2604 can sound very musical in the right application.
As always I advise a check on stability when swapping opamps

Swapping Op-Amps... you have checked to see it's stable haven't you ?

Beyond that I would see what the muting circuit is but you really need a circuit for that... without having the unit in front of me I wouldn't like to guess. If it uses transistors as a mute then these can usefully be changed for FET's (if the drive is correct) or sometimes removed altogether (if you are prepared to put up with possible pops/clicks at power on/off)

[artegagt]

Yellow cap is for RAM power...

[dovuhoang]

Hi Mooly, can i have your email, i can send you the circuit and the schematic draw. it is pdf file. tks!!

[chaotri]

i m curently thinking about mod a cd player to.

so i m interested in that topik.

first thing I realyse, is that your dac is tda1541 not A ? is that normal if you check on the net it should be :

SONY CDP-950
1 x TDA1541A – CXD1088A
KSS-150A / KSS-210A

i was about to buy a player of this ones but your picture make me doubt

[dovuhoang]

Do you mean that this is not the original DAC chip?
It's working good now since i replace the wire, however, i want to make more better moves.

My friend said i could replace the power transformer but i have no idea about that part.

i am waiting a friend in this forum for the circuit modification.

Notice that my CDP 950 is a second hand one. it may be fixed or mod, i dont know.