Marantz CD63 & CD67 mods list - Page 1047 - diyAudio
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Old 10th July 2008, 10:24 PM   #10461
RCruz is offline RCruz  Switzerland
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Thank you Simon

I will install my rig tomorrow.... I still wonder where the fumes came from in the sreg ??

Maybe the glue that sticks the transistor under the pcb ??
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Old 11th July 2008, 08:21 AM   #10462
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Hi Ricardo

Sounds like the reg is working fine under load.

The FET may have got hot and yes the glue that bonds it to the pcb may have smoked. Those FETs can handle 8Amp on a large sink so would have survived this small error.

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Old 11th July 2008, 08:24 AM   #10463
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Actually Ricardo the smoke you witnessed may have been some smoke wafting across from Simons cd player. The north of England had a smoke black out for 2 days

Brent
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Old 11th July 2008, 08:57 AM   #10464
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Quote:
Originally posted by rowemeister
Actually Ricardo the smoke you witnessed...
That's as much as I had to read to guess the rest...

Is it fixed yet?
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Old 11th July 2008, 11:12 AM   #10465
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I have a very nice CD85 in at work for upgrade. It is a proper old school cd player with bullet proof build. I really like the cast chassis.
I have attached a pic of the dac and some of the opamps with a few mods. 14X 220nF PPS caps for dac filter 3 opamps a clock and psu. The difference is massive, I am tempted to get one of these bad boys for myself to mess with. As standard the sound is very nice if a little shut in, now it sings so much more open and detailed with no loss of its musicality.

Oh did I mention the dac is a TDA1541A Single crown

Next job is caps and SPowers on dac and opamp supply.

PICCY

Brent
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Old 11th July 2008, 12:50 PM   #10466
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I heard the CD85 standard (nice but very shut-in) and with C1 (powered from SPower and psu) and some of the PPS caps on the DAC. Spellbinding. There must be something about the 1541 DAC.

Compared to Brent's well-modified CD17KI it's still not amazingly open and detailed and the bass doesn't extend very low, but it has a likeable character and makes you want to listen to the music!

With SPowers and other tweeks I bet it's pure gold.

Simon
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Old 11th July 2008, 01:24 PM   #10467
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Thank you Gentlemen.

Nice CDP you got there Brent.

Must focus now.... Modd time is here.....
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Old 11th July 2008, 01:33 PM   #10468
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by SimontY


Is it fixed yet?
You are so lucky Simon.....
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Old 11th July 2008, 02:37 PM   #10469
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by rowemeister


Oh did I mention the dac is a TDA1541A Single crown

PICCY

Nice job Brent.

Is the Single crown such a rarity ? I have read about its popularity but could never grasp the significance.

Did you glue the psu pcb to the chips... ?
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Old 11th July 2008, 02:42 PM   #10470
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You'll find the single crown in some nice players (like CD85, CD94 and Philips equivalents), and the double crown only in very high end players, the ultimate perhaps being the Marantz CD7.

A single or double-crown simply denotes a better tolerance, probably selected by hand.

Anyway, I don't think a single crown TDA1541 is particularly rare, but that CD85 sounds like some serious sex with only minor mods.... you have to wonder why.

Simon
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