OPPO UDP 203 mod/upgrade service

The OPPO UDP 203 can play almost any digital optical medium, including CD, SACD, DVD and ordinary Blue Ray discs and 4K Ultra Blu Ray discs, as well as music and movie files on a USB hard disk

And it is possible to play files stored on the NAS over the network.

 

 

With just one OPPO UDP 203, We can play almost all digital sources, so We can enjoy audio and home theater hobbies easily by putting all together to one source devices, OPPO UDP 203.

 

 

On the other hand, there is a desire to maximize the audio and video performance of the OPPO UDP 203 to deliver the highest audio performance .

 

 

On the video side, it is necessary to improve the performance as much as possible in order to improve the resolution and quality of the dynamic image by HDR as well as 4K UHD, 4 times the resolution of Full HD.

 

 

In this regard, the OPPO UDP 203 can be modified /upgraded in four ways.

 

 

No.1. Modification of power supply

 

Switching to a linear power supply for eliminating high-frequency noise dissipation due to the use of switching power supply and provide stable power supply of higher quality.

 

The replacement of this is the most important part of the modification.

In the case of audio, the center of the sound is stabilized as a pyramid type, the resolution of the middle and lower parts is increased, and the overall expressive power is greatly increased.

 

On the video side, For a large screen, especially a projector with a size of 100 inches or more, we can enjoy exact converges, but there are no artifacts, and the screen is transparent, elegant and stable.

 

No.2  Replacing the clock to the most accurate one

 

 The current clock has 300 PPM class accuracy.

Since all digital devices operate according to the reference clock.

As the accuracy increases, the operation is performed according to the correct synchronization.

 

Therefore, in the case of audio, the accuracy of the sound image is increased, the sound stage is deepened and wider while the detail and clarity of the sound is increasing.

 

 

existig clock wave form and jitter which spreaded in nearby frequency( above )

and Femto clock mod : perfect wave form and virtuallu no jitter.( below)

If you are using a good quality external DAC or AV processor, or if you are looking for Video quality improvement only , the above 2 modifications are enough.

 

 

The below No. 3 mod, high-end stereo 2-channel DAC replacement, is for those who want to extract the DSD file to the highest sound quality etc.

 

So this it recommended for those who focus on playing high quality music sources.

 

 

 

 

No.3. Replacing the internal DAC board

 

For the OPPO UDP 203, the DAC used is Asahi Kasehi's AKM 4458VN 8-channel DAC. However, it is disappointing to use general-purpose 5532 OP amp in I / V conversion circuit and the subsequent analog circuit, and using the electrolytic condenser for as a coupling capacitor.

 

It's OK to use 7.1-channel sound for movies, but not serious music listening.

 

Therefore, we designed this part as a high-end 2-channel stereo DAC board using the Saber ESS9038 RRO chip, which is rated as the best DAC in the world. The I / V circuits and analogue stages use the highest quality OP amp ICs, ultra-precision resistors, Wima film capacitors, with 11 of proprietary regulated local power supply.

 

In addition, it is designed to be electrically isolated from the main body through OPTO coupling, so that they do’nt interfere with each other, except only for exchanging data. This board also supports balanced output as well as unbalanced output using RCA terminal.

 

 

With this newly designed high-end 2-channel stereo DAC board, you can really enjoy high end 2-channel stereo. sound .

 

 

For general multi-surround sound of movies such as Dolby Atmos, you can use AV receiver through HDMI audio or coaxial and optical digital output.

 

 

 

 

No.4. Replacement of aluminium chassis and various anti-vibration measures taken

  

High-end players are seeking to extreme performance by enhancing mechanical completeness, such as preventing resonance.

 

A new aluminum case is designed with precision CAD system. In addition, the BD ROM drive unit has various supplementary measures taken , such as various damping material reinforcement for a more complete and smooths drive .

 

 

Remodeling/ new OPPO 203 player with upgrade service is in service now.

 

 Modification of No. 1 Linear power supply (LPM)

Standard type linear power supply 290$

 Special Edition Power: 360$

 (Nichicon Audio Grade Electrolytic Capacitor, Germany Wima Film Capacitor, Schottky Barrier diode, AMR Gold fuse)

 If you want to install a circuit breaker instead of fuse, add 30$ more .

 

 

 

No.2 Clock Modification

 

Fento clock mod :450$ 

0.001 PPM OCXO (Oven Built-in Ultra Precision Clock).: 340$

 If you use 2.5 PPM class TCXO (temperature compensated precision clock), 180$ .

 

No.3 Replacing high end 2 channel stereo DAC board: 400$ 

 

4. Replacement with aluminum alloy chassis etc

 

1000$ 

 

 

 

 

 

+8210-6773-5828: pcaudio@hanmail.net

 

Lee Jaehong

 

101-1106 Samboo Apt.

Wangsimni-ro 280, Seongdong-Gu

Seoul, 04751 (South) Korea

 

 

I can buy the Oppo 203 at a lower cost( 890$ wit blu ray /DVD  region free ) in here send it after the upgrade work.

Or you can just send me your OPPO player or just main board .

 

Linear power supply can be installed by your self within 5 min. easily with a driver. No soldering is needed.

 Clock modification an DAC board installation need a precise operation and must be done by myself.

 And I can install region free kit inside of OPPO 203 with upgrade service ( in case of N0.1 & N0.2 service and more )

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