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 Post subject: Saving Marantz CD67SE
PostPosted: Mon Apr 24, 2017 12:47 pm 
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Location: Toronto, ON, CA
A friend of mine bought a vintage CD player, the one "famous" for mods...I think he bought "for me", as the seller told him that the CD player is not working, probably a loose screw or something...so, he bought it as he knows that I will back him up.

I need adjust my friend policy, and need find some new friends ;-(

Anyhow, it's a beauty!
-This CD67SE is Singapore made version;
-As a SE version, it has a strengthen bar across the chassis...
-It has 2 windows on back panel...I will seal it to prevent dust...
-As the seller stated, it can power on, but no spinning after insert a CD ...

Problems:
-For vintage gears, as always, I checked the PSU part, fuses are not original and 1 is blown...
-Replaced fuses...checked voltages ...things seem alright;
-Power on CD player, nothing happened...no spinning...cleaned laser pickup on/off switch...no luck;
-Out of focus? After CD tray closed, I pressed the CD and it starts spin a bit, and after I release my finger pressing, it stopped spinning...

Seems out of luck, the laser pickup need be replaced....not a loose screw huh


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File comment: The fuses are not original, 1 of them is blown
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PostPosted: Mon Apr 24, 2017 1:04 pm 
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Make 'em an offer.

http://www.ebay.com/itm/NEW-OPTICAL-LAS ... Sw9mFWHK1t

_________________
I think, therefore I am not sure.


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PostPosted: Mon Apr 24, 2017 1:20 pm 
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Laser pickup replaced and working fine ;-)


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File comment: Playing....
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PostPosted: Mon Apr 24, 2017 3:38 pm 
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Actually, before replacing the laser pickup, followings have been done...
-Voltage regulators such as 7805, 7812, 7912, 7918 all replaced with new ones....
-2200uf power filter caps replaced with Elna LAO
-Reflow some solder joints...


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File comment: PS caps and voltage regulators replaced...
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PostPosted: Mon Apr 24, 2017 6:00 pm 
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Location: London, ON, CA
Thanks for the post. That pair of Marantz amp and CD player looks sharp.

I have a CD63 MKII here, bought it for a friend, and recently borrowed it back.

I compared it to my Oppo 103 and it was interesting to hear the difference. The Oppo has greater detail and refinement, but the Marantz is larger, warmer, and has a more prominent bass register. It's not nearly as tidy, organized and incisive as the Oppo, though. But it is a pleasant and musical player; it made me reminisce of a time when music was more of a laid back pursuit than a constant drive for "more".

What are your impressions of the Marantz CD player compared with today's players and DACs?


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PostPosted: Mon Apr 24, 2017 7:23 pm 
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L-Man wrote:
Thanks for the post. That pair of Marantz amp and CD player looks sharp.

I have a CD63 MKII here, bought it for a friend, and recently borrowed it back.

I compared it to my Oppo 103 and it was interesting to hear the difference. The Oppo has greater detail and refinement, but the Marantz is larger, warmer, and has a more prominent bass register. It's not nearly as tidy, organized and incisive as the Oppo, though. But it is a pleasant and musical player; it made me reminisce of a time when music was more of a laid back pursuit than a constant drive for "more".

What are your impressions of the Marantz CD player compared with today's players and DACs?


Thanks. The Marantz amp was recently restored...too lazy to move my primary amp back.

I have built an ESS 9018 DAC, a friend borrowed it for a while, he owns an OPPO 105 and wants to compare, and he said my DAC sounds better than his 105, especially in the high range. Oppo 103 uses CS4382, I have not heard one yet. Now days, the DAC chips have higher specs, take 9018 for example, the DAC I build sounds deep dark(quite)...a lot of details. Again, DAC chips themselves do not make sound on their own, the design, PCB layout and etc are far more important to sound. You might have noticed some high-end gears use "normal" DAC chips, but sound very good...some gears use very high-specs DAC chips and sound not so good...DAC chip is just a selling point.

Back to this CD67SE, it sounds musical, and bass is good...and I agree with you, it has some limits - sound is a bit compressed, high is a bit foggy, bass is ok but not very clean and tight...and maybe due to age, overall pleasant but a little bit harsh sometimes. On the other hand, CD63/67 has a good foundation there, and a lot of mods available online...a lot of fun.

Hopefully I can get permission from my friend, so I can do some mods and see if can set it free from the cage ;-)


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PostPosted: Tue Apr 25, 2017 2:23 am 
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I wish I had your expertise... I'd love to be able to mod a unit like the Marantz.

The Marantz is enjoyable and engaging, however, does not image vocals with the precision of the Oppo 103 (which just happens to be my current reference). Foggy is a good word to use; everything is there, but there's smoke on the stage, so to speak. But the bass is very robust, though lacking control.


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PostPosted: Tue Apr 25, 2017 6:32 am 
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L-Man wrote:
I wish I had your expertise... I'd love to be able to mod a unit like the Marantz.

The Marantz is enjoyable and engaging, however, does not image vocals with the precision of the Oppo 103 (which just happens to be my current reference). Foggy is a good word to use; everything is there, but there's smoke on the stage, so to speak. But the bass is very robust, though lacking control.


No expertise...some friends might call it "brave" as there is always a risk to kill the machine...my strategy is thinking & plan things through, and do things when I'm not exhausted, carefully and slowly...it's the most fun part for me ;-)
Given the price, CD63 and CD67 has something there, MBL has mod some and re-branded to MBL CDP1 and CDP2...I'm not saying CDP1/2 are the best...never heard one.

So, basically, if my friend give me a go, I will "copy" some of the mods from online which I think make sense...and try not to do too much


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PostPosted: Wed Apr 26, 2017 12:49 pm 
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Friend is happy with the player, after all given that price and now is working fine...besides it is better than some players already....I bet he is laughing while sleeping...
He agreed to do some upgrades as I promised minimum footprint, just connectors, some resistors and caps...


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PostPosted: Wed Apr 26, 2017 1:50 pm 
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You are lucky you found a replacement laser! In terms of mods, I would suggest putting in an IEC connector. I find that for the $15 for a Furutech IEC and a decent power cord, there is a nice improvement and not a lot of money is spent.


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PostPosted: Wed Apr 26, 2017 2:44 pm 
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Vinyl Guy wrote:
You are lucky you found a replacement laser! In terms of mods, I would suggest putting in an IEC connector. I find that for the $15 for a Furutech IEC and a decent power cord, there is a nice improvement and not a lot of money is spent.


I'd rather say "planned" than "lucky"...If I have not stocked some lasers for him, I would not "allow" him to buy this CD player. For stocking lasers, the rationales:
-I suspect this machine has a laser failure...checking the power supply and etc was just routine, no matter of what I need restore this path...
-As for vintage players, even it performs well now, it might fail anytime, especially the laser part as it is moving, easier wear out...

Thanks for the IEC suggestion, it definitely could be a plus. As I promised minimum footprint, cutting out metals from chassis might not for now...


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PostPosted: Wed Apr 26, 2017 3:22 pm 
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Thanks for sharing Frank, I really enjoy your DIY posts. Can I ask why you changed out the voltage regulators? Do they become problematic over time, or are newer ones better?


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PostPosted: Wed Apr 26, 2017 7:00 pm 
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electrafixion wrote:
Thanks for sharing Frank, I really enjoy your DIY posts. Can I ask why you changed out the voltage regulators? Do they become problematic over time, or are newer ones better?


Thanks. Both, new ones I used 7805@1A...
For power path, I need it robust, stable...so I can sleep tight.;-)


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PostPosted: Thu Apr 27, 2017 3:44 pm 
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Some tricks ...
-When removing parts, use solder wick on top of solder pad, press solder gun a bit...can cleanly remove solder...easily remove the parts, especially useful when remove the op amps or other parts with multiple legs...


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File comment: One op amp removed and add a socket...
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PostPosted: Fri Apr 28, 2017 8:13 am 
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Changes on output part...

Interesting that Marantz uses 2 elec. caps reversely connected in series as coupling...kind of made a BP cap
CD63/67 used higher grade caps (Elna ARS, aka Silmic), CD57 as a lower grade machine, uses Elna RA2 ...


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File comment: output couple caps replaced...mute transistors removed...
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