Sony CDP-557ESD

[Bumpalump]

Sony CDP-557ESD in my opinion is the most reliable unit ever made together with Sony CDP-X7ESD and CDP R series


This one is working now for over 33 years
The building quality is awesome




Lets do some adjustments

RF level at CD-R

RF level at original good disc

RF level at test disc

Jitter level

Optical power

Nominal LD current is 52.2mA
Measured is about 51mA

 

[Bumpalump]

All this unit require is to change after years Elna Duorex Capacitors for prepared set of capacitors


Some servo capacitors measurments

330uf 25v

100uf 25v

All of them were replaced on servo board
220uf 100v from digital section, measured good but they like to be leaky

1000uf 63v the same

Headphone amp section before

Headphone amp section after

 

[Bumpalump]

Audio measurments
THD

THD+N

Channel separation


After few hours the work is done, and player is ready for next 30 years of work

 

[Darkcloud]

M Hello, I recently purchased 557ESD. Which capacitors do you recommend I replace? Could you give me the capacitor codes and what I should use?

 

[Bumpalump]

I replaced all the elna duorex capacitors
Small values for nichicon fw, 220uf, 470uf and 1000uf i replaced for nichicon kz muse

 

[Darkcloud]

Is what you're talking about only valid in the power supply section?

 

[Darkcloud]

Will it be enough to change the capacitors that appear in the photo?

 

[Bumpalump]

Is what you're talking about only valid in the power supply section?

They are used in power supply, earphones amplifier, in servo circuit, replace every elna duorex

 

[shamblesuk]

Sony CDP-557ESD in my opinion is the most reliable unit ever made together with Sony CDP-X7ESD and CDP R series
View attachment 2356703

This one is working now for over 33 years
The building quality is awesome
View attachment 2356704

View attachment 2356705

Lets do some adjustments
View attachment 2356706
RF level at CD-R
View attachment 2356702
RF level at original good disc
View attachment 2356707
RF level at test disc
View attachment 2356708
Jitter level
View attachment 2356709
Optical power
View attachment 2356710
Nominal LD current is 52.2mA
Measured is about 51mA
View attachment 2356711

My 557-ESD