Marantz CD63 & CD67 mods list

[Fidelity Audio]

Just got home and found a UPS delivery ticket behind the door, the shipper is Nat. Semi. !!! Now that is what I call QUICK! Have arranged to send it to a factory down the road as I know someone will be there. Tomoz night I should be installing my new LM4562 opamps!

Cool

enjoy

Brent

 

[poynton]

Aaahh. I thought 30va was overkill but I didn't realise how much!

I do intend to swap it at some point for a slightly smaller version though. It fits EXACTLY in the "V" shape of the drawer when closed.

Thanks for the advice Brent. I assume the other parts of the circuit wouldn't need any more va than the clock either then?

Lee.

Here are the specs of the proposed replacement transformer :-

http://www.diyaudio.com/forums/attachment.php?s=&postid=823056&stamp=1137864729


See post around #374


Andy

 

[stueyh]

Well Ive got those opamps, removed the muting transistors, removed the output caps so at least Ive made a start!

Will bypass the HDAM tomoz. I have a tent XO which I'll build into a new clock with seperate psu.

The voltage regs will probably be from audiocom on ebay but Im not sure what you've actually done with feeding the various sections, still thinking about that.

Got the do the caps and diodes too!

I'll get there, sometime

 

[Glenn2]

Evening gents,

My 67SE has a noisy transformer but my standard 63 does not.
Are the upgraded SE transformers naturally noisier and can I do anything to stop mine buzzing? (This is mechanical noise, not electrical.)

I put some small bits of dynamat between the PCB and the chassis and also between the transformer bracket and the the PCB. This helped but it still irritates me.

Does the SE transformer really sound any better? I could swap them.

I've seen reviews of the 63SE and 67SE where people have complained of this so I don't think I'm alone.

Any tips here would be most appreciated.

Glenn

 

[Malefoda]

Here are the specs of the proposed replacement transformer :-

http://www.diyaudio.com/forums/attachment.php?s=&postid=823056&stamp=1137864729


See post around #374


Andy

Is it proposed or will/was any group buy?
If more I'm in. If cheap

 

[poynton]

Is it proposed or will/was any group buy?
If more I'm in. If cheap

Unfortunately, the proposed group buy never materialised.

Andy

 

[stueyh]

Well Ive got samples from NI themselves. Had to pay delivery which was $10. Ordered last thursday I think, landed today!!

 

[SimontY]

Well Ive got samples from NI themselves. Had to pay delivery which was $10. Ordered last thursday I think, landed today!!

They're good, enjoy

 

[Fidelity Audio]

Evening gents,

My 67SE has a noisy transformer but my standard 63 does not.
Are the upgraded SE transformers naturally noisier and can I do anything to stop mine buzzing? (This is mechanical noise, not electrical.)

I put some small bits of dynamat between the PCB and the chassis and also between the transformer bracket and the the PCB. This helped but it still irritates me.

Does the SE transformer really sound any better? I could swap them.

I've seen reviews of the 63SE and 67SE where people have complained of this so I don't think I'm alone.

Any tips here would be most appreciated.

Glenn

Yes the SE transformer does sound better! I have lots of 63 here at work and the (later) 63 and MKII do sound different and its due to the TX. A more fluid and solid audio performance from the MKII.

I would desolder the TX and remove, then bung in as much blu tak as possible underneath it, pop back into pcb and apply pressure whilst soldering it back in. Hopefully this should damp it quite a bit.

Brent

 

[Malefoda]

Unfortunately, the proposed group buy never materialised.

Andy

Any hope it'll be on again?

 

[Glenn2]

Yes the SE transformer does sound better! I have lots of 63 here at work and the (later) 63 and MKII do sound different and its due to the TX. A more fluid and solid audio performance from the MKII.

I would desolder the TX and remove, then bung in as much blu tak as possible underneath it, pop back into pcb and apply pressure whilst soldering it back in. Hopefully this should damp it quite a bit.

Brent

Cheers Brent!

I wonder if more pressure from above (via the cross brace) might achieve the same thing..... hmmm.....

 

[Fidelity Audio]

MKII seem to have more foam there

Brent

 

[Thomo]

Disc not spinning (again)

Can anyone tell me the most likely cause of my tx buzzing please?

The problem is on the 5v digital rail. Whenever I connect 5v to R508 (decoder digital) or RD04 (dac digital) the tx buzzes and the disc won't spin.

I have checked the voltages and everything seems ok. I can't find any bad solder joints and the regs are defo ok.

I know I keep asking questions, but I have tried and tried to sort this and have got no-where by myself.

Lee.

 

[Fidelity Audio]

If a TX buzzes under load it usually means the load is greater than it should be!

Measure Decoder side of R508 for continuity to ground. You may have damaged your decoder or in a better case have a short on pcb after the res.

Brent

 

[Thomo]

Measure Decoder side of R508 for continuity to ground.

Brent

This may sound like a stupid question, but how do I do this? My dmm doesn't seem to have a continuity test!

Lee.

 

[Fidelity Audio]

LOL - ohms test. Now I know all DMM have ohms (continuity) test as I repair and calibrate them.

Let us know

Brent

 

[Thomo]

LOL

In the wise words of the great Homer Simpson......

DOH!!!!

 

[Fidelity Audio]

LOL - or "mmmmm B-B-Q" (not saying its toasted or anything)

Brent

 

[Thomo]

Ok. I placed the red lead on decoder side of R508 and the black on ground (pin 43 on decoder). My dmm only reads up to 2m and it went off the scale. So the resistance was >2m.

I think that may be a little high!

I guess that means decoder is poorly then?

Cheers Brent for the advice.

Lee.

 

[Thomo]

"mmmmm B-B-Q"

Brent

"mmmmm B-B-Q chips?"

or is that too corny?