Marantz CD63 & CD67 mods list

[SimontY]

Originally posted by rowemeister
The third pin of Q801 and Q802 are the +/- 12V outputs.

The third pin of Q811 is the 5V output

When measuring make sure your common on the DMM is to gnd, Hdam can is a good place for this (ooops you removed it lol).

Measure pins 13,20,28 on ic Q104 for 5v.
Measure pins 1,2,8,9 on ic Q105/Q106 and QM01 for +/- 10V

Hmm

I could so easily short those pins. It's a bit too risky, and it means turning it on when it's not in it's box, which scares me, quite frankly.

Is there no safe way to test at least some of the voltages? Couldn't I leave the pcb in and just probe some jumpers, for example?

Will test mode show anything useful perhaps? It will certainly be the next thing I try.

[Fidelity Audio]

NO

The player will work without the DAC clock in. You will get no sound

Also the processor clock must be running otherwise nothing would work.

mmmmmm

It will be something really minor causing it

[SimontY]

Originally posted by float
HI Simon,

I remember reading somewhere that the clock must start up no later than the rest of the player (if that makes sense).
Is this still the case with your current clock power arrangements?

Dodgy clock lock will affect transport. ( I think )

Hello float,

But my clock is quite well separate from the rest and has been for years, so I really don't suspect it. I've tested the psu voltage to it, and the clock wires go well into the board. Also, when the clock is disconnected the error is quite different (from past experience) - no horrid noises (and no TOC etc.)

[Fidelity Audio]

The 5V reg is easy to test and so are those pins on the ic's with the pcb fitted to player.

[SimontY]

Then I shall begin by testing there at 5v.

Helpful as ever rowemeister, this is a helpful forum

[6h5c]

Originally posted by SimontY


Hmm

I could so easily short those pins. It's a bit too risky, and it means turning it on when it's not in it's box, which scares me, quite frankly.

Is there no safe way to test at least some of the voltages? Couldn't I leave the pcb in and just probe some jumpers, for example?

Will test mode show anything useful perhaps? It will certainly be the next thing I try.

In test mode you can check if all the individual servo's are working.

With the PCB in the player:

- you can measure at RD01 and RD04 for +5V to the DAC and clock.
- R508 and 511 for +5V to the decoder
- R122 and 123 for +5V to the servo chip
- R136 too see if the laser gets +5V (switched)
- and all the other 4,7R resistors that were replaced by inductors

The +/- 12V is only used for opamps/HDAM/phones and muting, the player should work o.k. without it. But you can check it at pins 4 and 8 of either opamp, or at R613...616.

Good luck!

Ray.

[6h5c]

Originally posted by float
HI Simon,

I remember reading somewhere that the clock must start up no later than the rest of the player (if that makes sense).
Is this still the case with your current clock power arrangements?

Dodgy clock lock will affect transport. ( I think )

This is only the case with the CD57 or CD67, for those players you are right.
The decoder and servo are integrated in one chip there, that get's its clock from the DAC. If the clock's not there in time, the player won't work.
But the CD63 uses a separate servo-chip which generates it's own clock.

Ray.

[SimontY]

Originally posted by 6h5c
In test mode you can check if all the individual servo's are working.

With the PCB in the player:

- you can measure at RD01 and RD04 for +5V to the DAC and clock.
- R508 and 511 for +5V to the decoder
- R122 and 123 for +5V to the servo chip
- R136 too see if the laser gets +5V (switched)
- and all the other 4,7R resistors that were replaced by inductors

The +/- 12V is only used for opamps/HDAM/phones and muting, the player should work o.k. without it. But you can check it at pins 4 and 8 of either opamp, or at R613...616.

Good luck!

Ray.

Excellent, I will look for these parts and measure the voltages

Many thanks

Btw, can I harm anything by leaving everything powered up whilst it's in this unhappy state? Should I disconnect the drive's power or anything?

[Fidelity Audio]

you will soon find out!!! LOL

Its the only way to find out mate really.

[SimontY]

I could always buy another off Ebay, lol!