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Reclocking Meridian 506 CDP

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Reclocking Meridian 506 CDP

Post by mthoi on Mon Jun 17, 2013 4:21 pm

After reading Wikin and other positing on the CDP upgrades, I finally took courage and embark on a similar DIY project.  

My Meridian was having track skipping problem.  I changed the laser lens, but the problem persisted after a few days of use.  I solved this problem by changing all the PSU caps on the servo controller board using Panasonic FCs caps.  While I was at it, I also decided to change all the PSU caps since the CDP is over 20 years old.

It took me a while to plan a DIY upgrade my Meridian 506 CDP. Unlike  some Philips and Marantz CDP, there were not much information on the net on Meridian 506 - no schematics nor modifications. I also contacted Meridian for the schematics, but no avail. The effort was in tracing and studying the circuit and components.

I finally did the following :-
i. Upgrade to Burson dual opamps,
ii. Reclocked using a DIY TCXO clock and shunt power supply
iii. Recaped all the PSU capacitors
iv. Changed the voltage regulators (7805) to LT1085.


  


PM me if you have a Meridian schematics, or want to embark on your own DIY project to upgrade your M 506. I would be happy to share with you the schematics and components tracing/values that I have developed in my DIY project.

mthoi
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Source(s): Marantz SAKI Pearl, Michell Gyro, Garrard 401, Lenco L75, Technics SL1200II
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Re: Reclocking Meridian 506 CDP

Post by sph on Mon Jun 17, 2013 9:06 pm

Any significant improvements?

Maybe silly of me to pose such a question. 
I presume it's obviously a successful upgrade.

sph
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Re: Reclocking Meridian 506 CDP

Post by Wikin on Tue Jun 18, 2013 6:43 pm

Nice work MTHoi; I like that pcb for the clock - components laid out just nice and well implemented.

cheers
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Re: Reclocking Meridian 506 CDP

Post by kp93300 on Thu Jun 20, 2013 11:18 am

Hi MTHOI,
thanks for sharing.  As usual, tidy and neat handiwork !
this reminds me. I have a 20yr krell kps 30i in my store room  waiting for a similiar upgrade.
I am sure you have the next project after this .Post  more pictures .
regards
kp93300

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Re: Reclocking Meridian 506 CDP

Post by mthoi on Thu Jun 20, 2013 9:00 pm

Hi Wikin, Dr KP,  tx for the encouragement. The next project is to do more work on my TDA1541 DAC - done the PSU upgrade and DEM reclock.  Now looking into tube stage IV with lundahl OPT.  Will update when done.

Reg.

mthoi
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Location : Petaling Jaya
Registration date : 2009-02-26

Character sheet
Source(s): Marantz SAKI Pearl, Michell Gyro, Garrard 401, Lenco L75, Technics SL1200II
Amplification: c3g/F2a + C3m/300b PP biamp, 26 Preamp, 76 Preamp + 2A3/845, c3o/300b, Quad 34/606
Speakers: Harbeth SHL5, Altec A7 288-8G/1505B VOTT + JBL 2404H, Tyler Acoustics + Altec 288/Jabo Horns

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Re: Reclocking Meridian 506 CDP

Post by mawiaw on Sun Sep 29, 2013 7:59 am

tube may be fancy,but lacking too much in BASS department.Think twice!
i perfer stock original although be a littler lesser.

mthoi, after so much of works,how is the final result?
is it worth the effort?
many readers are waiting for your answer?

mawiaw
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