Clock speed of Sony 620 650 ES players

[Fritz]

Does anyone know the clock speed of teh Sony CDP620 or 650ES players? They were built around 1986.

[Elso Kwak]

Originally posted by Fritz
Does anyone know the clock speed of teh Sony CDP620 or 650ES players? They were built around 1986.

Hi Fritz,
As your Sony was before the introduction of Sony's bitstream converters I believe the frequency is 16.9344MHz.
But you have to locate the crystal anyway if you want to do the clock mod. The crystal looks like a small flattened metallic cylinder. Usually the frequency is printed on it, at least partially.
Hope this helps,

[Fritz]

Hi Elso,

Unfortunately the thing is packed so tight you cant read the side of the crystal so I may have to remove it to read the package. Woud I be removing the crystal anyways for a clock mod. ie is this were an external clock wires in?

THanks

[Elso Kwak]

Originally posted by Fritz
Hi Elso,

Unfortunately the thing is packed so tight you cant read the side of the crystal so I may have to remove it to read the package. Woud I be removing the crystal anyways for a clock mod. ie is this were an external clock wires in?

THanks

Hi Fritz,
Yes, one of the two pads of the crystal is used to connect the clock. Yes the crystal has to be removed anyway.

[jleaman]

Sony CDP620 can a external dac be used on this cd player ? I have one that could maybe be used for something ..

j'