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nonos 11th June 2004 06:34 AM

Philips cd753
 
Hello,

I look for the Philips CD 753,723 schematic or service manual.
I would like to make a transport with this CD.

Can anybody help me?

Thanks

brian851 30th July 2009 01:32 AM

cd723 service manual
 
Here you go.

:-)

UV101 6th December 2010 09:59 PM

Hi, did you manage to find a copy of this manual? I got quite a few on my links page but not this one and I'm about to modify one for a friend. If you have one, I'd be grateful Thanks :-)

stainless 15th December 2010 02:55 PM

service manual

CD723

Service manual, eprom result list | ElektroTanya | Service manuals and repair tips for electronics experts

CD753

Service manual, eprom result list | ElektroTanya | Service manuals and repair tips for electronics experts

UV101 17th December 2010 09:43 AM

Many Thanks :-)

JosM 14th April 2011 09:14 PM

Could someone tell me what kind of modifications he has made? I'am also very interested in de CD 753.
Thanks a lot

UV101 14th April 2011 10:24 PM

Hi, I modded one of these for a friend. They are very very good as std. In fact they sound better than they look like they should.

I replaced the smoother in the psu (+10v before the reg) with much larger 22,000uF Panasonic TSUP's, Built a separate +/-12v regulated supply for the opamp stage and replaced the opamp with a LME49720HA, split the 5v rails for the DAC and fed with 3 independent regulators. I replaced lots of decoupling caps with Rubycon ZA's.

On the transport, I replaced the clock with decent oscillator powered from a low noise reg and replaced several caps with ZA's again.

I'm sure I did something with the elco's in the signal path on the output but I cant remember what!!!

The result was stunning. This player looks like a low end toy but would seriously give some "hi-fi" a run for its money with mods. ;)

JosM 15th April 2011 09:30 PM

Thanks for your comment. I will replace the opamp with a LM4562 and I recognise many of your mods.

UV101 4th May 2011 07:53 AM

I found a couple of pics showing the mods I did. Clock with decent reg, big caps on the rails, lots of small ZA caps for local decoupling and 3 separate regs on the dac. Oh and the opamp :)

http://tapatalk.com/mu/5218fca1-f72f-af24.jpghttp://tapatalk.com/mu/5218fca1-f767-48f1.jpg

JosM 5th May 2011 09:20 PM

Very impressive. I have still a modification for you. You could remove the "mute" transistors at the output of the opamp. It is known that these transistors influences the sound, produced by the CD player.


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