Marantz CD63 & CD67 mods list - Page 651 - diyAudio
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Old 1st May 2007, 01:12 AM   #6501
aquar is offline aquar  Indonesia
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and new psu
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Old 1st May 2007, 06:20 AM   #6502
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Hi guys,

its been quite a few months since my last mod. I think i have sort of completed all thats available on Ray's list.

I am thinking of doing some mods to it to further unleash the potential of this player. What would u guys suggest, since i have a bit of time now.

Rgds,
Marcus
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Old 1st May 2007, 08:03 AM   #6503
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Good clock & its PSU!
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QED T260, Thorens TD-318, Marantz CD-43, TK2050, JBL 4313B & MJK's OB: music!
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Old 1st May 2007, 08:04 AM   #6504
Chivvyp is offline Chivvyp  United Kingdom
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Quote:
Originally posted by Malefoda

and for the ones who wants to help me on my new integrated amp...
[/B]

I can recommend a Charlize t-amp. only 100 usd from DIY paradise. Sounds great with my cd67.

Regards

Pete
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Old 1st May 2007, 08:53 AM   #6505
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by marcusdeming
Hi guys,

its been quite a few months since my last mod. I think i have sort of completed all thats available on Ray's list.

I am thinking of doing some mods to it to further unleash the potential of this player. What would u guys suggest, since i have a bit of time now.

Rgds,
Marcus
Then it's time to move on to Brent's list. Tell us what's not good about the sound and we can tell you what to upgrade.


Quote:
Originally posted by Malefoda
Good clock & its PSU!
Anyone using this as their main source needs a serious clock and serious psu. Anything less is a false economy.


Quote:
Originally posted by Chivvyp
I can recommend a Charlize t-amp. only 100 usd from DIY paradise. Sounds great with my cd67.

Regards
Pete
But he already bought an amp!

Simon
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Old 1st May 2007, 09:08 AM   #6506
quan is offline quan  Australia
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Question marantz 67 mod

Hi guys, i replace all diode with Hexfred, follow the mod list as per Ray pdf but the left chanel has no sound, at CF01-i used inductor from Jaycar- 150mH/4.2R whereas all other position are 470mH/2.5R-would this cause theproblem?
or should i undo all the soldering and start again? Any hints would be appreciated. Thanks. Quan
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Old 1st May 2007, 09:20 AM   #6507
SimontY is offline SimontY  United Kingdom
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Default Re: marantz 67 mod

Quote:
Originally posted by quan
Hi guys, i replace all diode with Hexfred, follow the mod list as per Ray pdf but the left chanel has no sound, at CF01-i used inductor from Jaycar- 150mH/4.2R whereas all other position are 470mH/2.5R-would this cause theproblem?
or should i undo all the soldering and start again? Any hints would be appreciated. Thanks. Quan
Does the other channel sound ok? Is there any DC on the output or anything suspicious like that on either channel?

If one side works but the other doesn't it's probably quite a simple problem to solve (relatively). If you can touch a wire (connected to the interconnect feeding your amp) to the output pin of the op-amp, whilst music is playing, you will eliminate some parts of the circtuit from blame. If you hear the music then you must have an open circuit somewhere between the op-amp and the output socket. This should be easy to fix.

If you get no joy from this it's probably an op-amp leg not soldered in properly. Check the op-amp power supply pins for voltage (+12v and -12v: i think it's pins 4 and 8 but please check).

Simon
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Old 1st May 2007, 09:23 AM   #6508
quan is offline quan  Australia
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Hi Simon, how do i measure Dc offset?, the op-amp is LM4652-which pin do i measure for the ouput? Quan. By the way, digital output is normal thru DAC.
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Old 1st May 2007, 09:32 AM   #6509
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by quan
Hi Simon, how do i measure Dc offset?, the op-amp is LM4652-which pin do i measure for the ouput? Quan.
To measure DC you put your multimeter black on the ground of the output socket and red into the middle. Set your meter to read DC volts, turn the player on and read off the figure. If it reads in whole volts rather than millivolts you have a problem. But this does also completely depend on whether or not you removed the DC blocking caps!

I believe you need pin 7 for output of the op-amp. Whatever you do don't short it out to pin 8. There will be a resistor or wire link that you can take this signal from, to avoid risking shorting anything on the op-amp itself. Can anyone help us here by remembering what resistor that is?

If the digital output is ok your problem should be easy enough to fix. (says he who pulls his hair out for days and weeks when it stops working...)

Simon
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Old 1st May 2007, 09:38 AM   #6510
quan is offline quan  Australia
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Hi , Simon- the measured DC offset on left chanel is 27mV but the right chanel showed 12V?????, I have removed the Dc blocking caps. Quan
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