Marantz CD63 & CD67 mods list - Page 1104 - diyAudio
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Old 18th October 2008, 09:26 PM   #11031
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by padman
lol thanks hotiron im now briming with confidence lol!!

seriously im only thinking of a few tweaks open up the sound a little and tighten up the bass.

good idea on the practise board got a non working sky box to play with. ian

Try removing the output caps and replacing the stock 7805 main +5v reg by a LM304AT (better +5v reg).

Next replace the rectifier diodes by some schottky.

You will surelly hear a big difference.

Ricardo
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Old 18th October 2008, 10:57 PM   #11032
hotiron is offline hotiron  Scotland
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Quote:
Originally posted by RCruz



Try removing the output caps and replacing the stock 7805 main +5v reg by a LM304AT (better +5v reg).

Next replace the rectifier diodes by some schottky.

You will surelly hear a big difference.

Ricardo

Ian aint even got an iron yet let him practice on his old SKY box!
Think you meant LM340AT-5

I have enjoyed your upgrades over the past year or so I am also a TT man but find CDs more alcohol friendly I working with Ye good old CD63 and two rotel RCD855s right now one standard the other modded, so I can always go back and prove I am not deluding myself.
Long may this thread continue Many thanks Ray
Kind regards Cha
PS I think everybody else is in the bar right now! LOL
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Old 18th October 2008, 10:57 PM   #11033
hotiron is offline hotiron  Scotland
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Quote:
Originally posted by L700
recently just bought CD63 just for USD100 with new VAM1202 lens

i just do some minor mod the mod its correct got anythings need to touch up hehehe

Click the image to open in full size.Click the image to open in full size.
PCB not set right should be on top of metal tab, top right of pic.
remove C659 C660 next to phono sockets,
feed DAC with its own 5V reg through u164.
Get some nice silver teflon coated wire for mods from electronic scrap. Go to scrap yard!
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Old 19th October 2008, 04:01 PM   #11034
padman is offline padman  United Kingdom
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Hi any1 got a schematic for cd67 available as download??
thanks ian
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Old 19th October 2008, 04:42 PM   #11035
poynton is offline poynton  United Kingdom
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Go to post #1

The manual is on Ray's site.


Andy
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Old 19th October 2008, 06:58 PM   #11036
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by hotiron


Think you meant LM340AT-5

I have enjoyed your upgrades over the past year or so I am also a TT man but find CDs more alcohol friendly
You are right LM340AT-5

Thank you for your follow up

I still believe it is much easier to get a full on sound with a TT.

After all this time and mods, I still think I need more upgrades in the CDP....

Quote:
Originally posted by hotiron


PCB not set right should be on top of metal tab
I can even see the pcb bending from here.
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Old 20th October 2008, 01:20 AM   #11037
L700 is offline L700  Malaysia
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Quote:
Originally posted by RCruz

You are right LM340AT-5

Thank you for your follow up

I still believe it is much easier to get a full on sound with a TT.

After all this time and mods, I still think I need more upgrades in the CDP....

I can even see the pcb bending from here.

lol its because when i bought it is like that i just follow to put back maybe the previous owner changing the lens put back .... wrongly
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Old 20th October 2008, 02:05 PM   #11038
ccschua is offline ccschua  Malaysia
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Quote:
Originally posted by L700
recently just bought CD63 just for USD100 with new VAM1202 lens

i just do some minor mod the mod its correct got anythings need to touch up hehehe

Click the image to open in full size.Click the image to open in full size.

why not post us the OPA Earth in the 63 together with your review.
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Old 20th October 2008, 02:28 PM   #11039
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by rowemeister
I personally dont think removing the muting transistors makes much difference, it's just another tweak

Hi Brent

I agree with you... I did not notice any big difference when I removed the mutting transistors near the output.

I have another important question for you....

I am now studying the new PSU for the Decoder.

I want to place some LM340AT-5 around the Decoder and HF amp.

I am planning to do the following:
Replace R511 (Analog +5v PSU) with a reg
Replace R508 (Digital +5v PSU) with a reg
Replace R505 (HF Amp +5v PSU) with a reg

I will use a TX with two 9V windings and build two separated PSU using your PSU PCBs.

Can I use one winding (+ smoothing + rectifier) for the Decoder Digital + HF amp, and the other winding for the Decoder Analog ?

As I am using LM304AT, and want to place them near the ICs, can you recommend an output cap for each situation ?

Also, can I pull the reference GND from each reg to the star earth or should I connect these GND locally ?

Regards

Ricardo
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Old 20th October 2008, 02:54 PM   #11040
padman is offline padman  United Kingdom
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Hi all
been looking around the inside of the player trying to follow mods listed.
can any1 explain how to di connect the power switch (not tried as i dont want to break it)
also when running a disk the plastic disk on top of the transport wobbles a lot! is this normal?

Thanks Ian
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