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Oppo new UDP series players - 203/205 - Discussions, upgrades, modifications
Oppo new UDP series players - 203/205 - Discussions, upgrades, modifications
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Old 14th January 2017, 09:27 PM   #31
jmyres is offline jmyres  United States
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Quote:
Originally Posted by ticknpop View Post
My experience on rebuilding older Oppo players is that they make great universal transports, both the linear and switchmode power supplies can benefit from some upgrades, but it's much better to go with a higher built external dac, no amount of upgrades and new digital chips can overcome the IC output stage and common power supplies compared to discrete jfet IV filters and shunt regulators. It will be interesting to see how Oppo use the 9038 chipset in the new Sonica dac. Will it have linear regulators, fast recovery snubbed diode bridges, discrete IV and output buffer, better clock, will Batman save Robin this time, stay tuned my friends...........
Thank you for this awesome bit of wisdom. An internal vs external DAC upgrade is a topic I've been researching lately.

The idea that the Oppo makes a nice transport is really useful, so with that in mind, what remaining upgrades have worked best? Would linear power supply, clock, and possibly shielding upgrades make sense, especially in terms of audio performance?
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Old 17th January 2017, 11:07 PM   #32
wushuliu is offline wushuliu  United States
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Quote:
Originally Posted by jmyres View Post
Thank you for this awesome bit of wisdom. An internal vs external DAC upgrade is a topic I've been researching lately.

The idea that the Oppo makes a nice transport is really useful, so with that in mind, what remaining upgrades have worked best? Would linear power supply, clock, and possibly shielding upgrades make sense, especially in terms of audio performance?
Yes. Power supply and clock upgrades are a must.
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Old 17th January 2017, 11:48 PM   #33
Jae Hong Lee is offline Jae Hong Lee  South Korea
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I made mistake to measure the size of psu.

I took out board and measured again.
The dis tance between holes is 145mm by 95mm.
Sorry.
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Old 18th January 2017, 09:25 AM   #34
Coris is offline Coris  Norway
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Oppo new UDP series players - 203/205 - Discussions, upgrades, modifications
95mm is also a wrong dimension... The SMPS board size for 203/205 models is 100x155mm...Quite far from your statements...
However, I got the right dimensions in the mean time, and the redesign of my linear power supply (LPM) for the new Oppo series (203/205), is now finished and the boards are in production...

Last edited by Coris; 18th January 2017 at 09:28 AM.
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Old 1st February 2017, 07:14 AM   #35
Joe Rasmussen is offline Joe Rasmussen  Australia
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Originally Posted by Jae Hong Lee View Post
I just uploaded 27 Mhz clock circuitry in my blog.

Click the image to open in full size.
So this is on the underside of the digital Mainboard, right?

A little more zoomed out photo would have been nice too, but thanks.

Cheers, Joe

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Old 1st February 2017, 08:53 AM   #36
Coris is offline Coris  Norway
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Oppo new UDP series players - 203/205 - Discussions, upgrades, modifications
I think it may not be just useful a more detailed picture about this back side resonator. More important is in my opinion, heaving in hand the board and so find out which via it connect the back side to the upper side for the clock signals... Then a good closer up of that area/via it may be more useful...
However, we may find out about quite soon...

BTW, Joe welcome back into the field...
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Old 2nd February 2017, 09:32 AM   #37
Joe Rasmussen is offline Joe Rasmussen  Australia
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Originally Posted by Coris View Post
I think it may not be just useful a more detailed picture about this back side resonator.
It might be a powered oscillator?

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Old 2nd February 2017, 08:20 PM   #38
Coris is offline Coris  Norway
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Oppo new UDP series players - 203/205 - Discussions, upgrades, modifications
What is in this picture is a resonator... We can see two caps (C525/526) and two resistors (R531/532), around and close to X501, which is typical design for a resonator approach. The consecutive marking of these passive components it suggest a very close functional connection in between. These R/C are part of the resonator device circuit.
A well known and "classical" Oppo design for the main processor clocking. However, an powered oscillator design it should increase the production costs. Lowest cost is always preferred...
The modders should do the work, replacing it with the right approach...

Last edited by Coris; 2nd February 2017 at 08:23 PM.
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Old 2nd February 2017, 11:09 PM   #39
Joe Rasmussen is offline Joe Rasmussen  Australia
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Originally Posted by Coris View Post
...which is typical design for a resonator approach
Yep, was just wishing...

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Old 9th February 2017, 12:10 AM   #40
Jae Hong Lee is offline Jae Hong Lee  South Korea
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I just finished OCXO/TCXO clock module installation for OPPO UDP 203.



The result is wonderful . More detailed and vivid picture and trueful digital sound .



0.01 PPM class Ocxo clock is used for 27 MHz system clock

and 2.5PPM class TCXO clock is used for secondary OPPO ARM chip operation.



It needs 4 V AC for supplying 3.3V DC.

So I ordered special transformer which has 4V and

6V AC tap( later it will be used for supplying 5V DC to ESS9038 PRo featured DAC board)

for more pictures , visit my blog at

Jae H. Lee Blog :: Jae H. Lee Blog

Click the image to open in full size.
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