Marantz CD-7 + XO2 clock and XO Supply

[D.A.R.R.Y.L.]

Hi All,

Have bought XO2 Clock and XO Power Supply. Now, after removing the copper shielding from the system clock assembly of my Marantz CD-7, I find two SMD mounted KDS clocks. One reads KDS 8D 36,864MHz and the other one reads KDS 0D 33, 868MHz. And a lot of SMD r's and c's surrounding it.

Has anyone got the CD-7 schematics or experience in replacing the clock?

Thanks in advance.

Kind Regards,
Ramon
The Netherlands

[D.A.R.R.Y.L.]

Hi all,

Elso provided me with a schematic of the CD-7. Thanks again Elso!!!

Now one more question:
My CD-7 has two clocks, one for 18 bit and one for 16 bit operation i think. Below are the schematics

I Think i need to remove c357 and c358, and the x301 clock off course. Then connect the new clock over the resisitor r341. But does it matter where the black and purple wire of the new clock are fitted?



Thanks

[jean-paul]

Remove L304 and C359. Remove R341 and R342, X301, C357 and C358 and finally remove Q322.In short, remove all circuitry around Q322 You can leave C360 where it is.

Now connect the output of the new clock to where pin 4 of Q322 was before or use the upper connection where R342 was when that is more convenient. The left leg of R343 is a possibility too. I do not know this famous cdplayers insides well so check the most convenient spot yourself. The shorter the wires from the clock to the pcb the better.

Although familiar with Tent clocks I can't tell what colour the output wire is but I am confident that a manual was shipped with the clock which can explain that.

Please do not screw up this beautiful piece of technology by accident. Although I don't have much time I am willing to advise you more or to do the job for you in case you are uncertain if you'll succeed.

[D.A.R.R.Y.L.]

Hi,

Thanks for your excellent detailled response!
I will definately not screw up the CD-7, trust me ;-)
Have repaired a lot of good old Marantz amps, but never with smd technology.

As the schematic from the mounting manual Guido provided me with shows, he advises only to remove both 12pF capacitors and the clock.



Why do you advise to remove everything including the servo IC?

Kind regards,
Ramon

[jean-paul]

Guidos advice is for servo ICs that connect the XOout internally to other circuitry. So no possibility to connect a new clock internally to that circuitry.... Indeed this schematic applies to 99% of cdplayers. Except CD7

The oscillator as used in the CD7 is more or less discrete built and it is better to omit it alltogether and to connect the new clock to the point where the old clock outputted its signal to. Q322 is NO servo IC but a inverter in a SMD case.

As I see it the purple wire of the Tent clock is output.

[D.A.R.R.Y.L.]

Hi Jean Paul,

Are you sure on removing all these components?

Hope Guido Tent will also shed some light on the matter.

Thanks

[jean-paul]

Ask Guido if you think others can't handle it. I can't be more sure than I am now.

[D.A.R.R.Y.L.]

Hi Jean Paul,

My question was not intended as an insult or me doubting your apparent expertise. Just a bit carefull with my precious CD-7, that's all.

Please don't be offended.

Kind regards,

Ramon

[Cobra2]

If you lifted the copper-cover...
And included a bit more of the schematics...for all the stuff under the lid.

Arne K

[D.A.R.R.Y.L.]

Hi,
The schematics of all under the copper lid, are posted earlier..