Marantz CD63 & CD67 mods list

[bikeral10]

Hiya simon,
Nah it was bog standard What cn you modify simon nothing in there ?

alan

 

[SimontY]

You're kidding! CD4000 is a £100 player vs the £400/500 CD63KI of a few years earlier.

It may be empty but that's more space for power supplies, clocks, the family jewels etc.

What can you do?! Same as any - clocking, power supplies & regulators, output stage work, mechanical tweaks.

 

[Fidelity Audio]

You can mod anything, nothing is unmoddable.

I'm currently upgrading the power amps out of the Hart Audio EVO-1 speakers (for Hart) - http://www.hartaudio.com/Speakers/Hart+EVO-1+Dual+Monitor+Loudspeakers.html

Well I will be later this week

Brent

 

[bikeral10]

It was an empty box,a small tx and psu board the rest was strapped to he underside of the mech?. my eyes aint that good anymore.
alan

 

[bikeral10]

Anybody have an idea as to where i can obtain some large value caps for an amp ive got (marantz pm84mk2) 75v 22,000uf and 56v 16,000uf the originals are macron i think.
alan

 

[Fidelity Audio]

Send Lee a PM

Brent

 

[bikeral10]

Thanks brent,
Its an old 80s class a worth repairing.
alan

 

[Fidelity Audio]

Yeah Class A is uber

Brent

 

[Chivvyp]

DOS

I have to say I'm impressed with the DOS, really making my 67 sound smooth.

Has anyone here tried fitting one to a TDA1541 machine? Any advice? I know it's not a straightforward replacement due to the dac output type.

Regards

Pete

 

[Thomo]

I did it once Pete. The only real issue for me was gain, the DOS not having enough of it. You can increase those emitter resistors but you soon run into distortion. I think though you should be able to also increase the 4k7 resistors on the input fet to increase gain, but I haven't tried it.

Edit: you'll have to remove the filter section from the input too

Lee.

 

[SimontY]

Pete, the Pass D1 is good on the 1541, at least I think so.

Brent, can you get me some free samples of the Hart speakers please? I think they'll fit in my tiny bedroom perfectly.

 

[Fidelity Audio]

I might be able to get you some a little cheaper ;-)

They do sound superb btw

Brent

 

[SimontY]

Yay

 

[tms2000]

Cd63se display dead,all other functions ok. Not doing any mod.happen during play. Panel is working when fit on another player. Please help!

 

[Fidelity Audio]

Check the regulator Q851 for voltage. Also measure voltage on U113 and U112.

Brent

 

[UV101]

Hiya simon,
Nah it was bog standard What cn you modify simon nothing in there ?

alan

Check this one! The DAC and output board is only just wider than the transport. The transport has the HF, decoder and servo section underneath it.

This had a few decent local caps, some big TSUP's, a clock, multiple std regs on the dac and a tin hat opamp. It was very impressive! I was completely shocked!

http://www.diyaudio.com/forums/digital-source/35841-philips-cd753.html#post2560879

 

[Fidelity Audio]

You noob! you left the muting transistors in LMAO

Brent

 

[UV101]

You noob! you left the muting transistors in LMAO

Brent

Dont you bloody start as well!!! FFS!!!

I think they may have been linked out under the PCB but I cant remember. I also noticed after the comments on that thread, that the DC blockers after the opamp are removed after all. You can just make out the wire links on the board. The green nichicons you can see are the blocking between the DAC and opamps. It was those ones that I measured DC on.

 

[SimontY]

Linking them out would mute, wouldn't it Ian?

 

[tms2000]

Check the regulator Q851 for voltage. Also measure voltage on U113 and U112.

Brent

Q851-4.1V U112 & u113 4V. Thanks Brent.