MOFI-MOD OPPO UDP-205 Player Linear Power Supply Upgrade Kit（R-Core)
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Specifications
- Brand Name
- OnifealiMajeson
- High-concerned chemical
- None
- Origin
- Mainland China
- Compatible Audio & Video Equipment Style
- player
- Certification
- NONE
- Choice
- yes
- semi_Choice
- yes
Product Description
OPPO Upgrade KIT Project
To complete this project, you need to have superb electronics knowledge and a certain amount of DIY ability.
Due to time zone and language communication restrictions, we can only provide limited technical support, and you need to solve problems by yourself. We do not provide information other than the product introduction page.
MOFI-MOD OPPO UDP-205 Fully Discrete Linear Power Supply Upgrade Kit Project
All-discrete topology
Series regulator design.
No IC (integrated circuits) are used.
Low noise, high PSRR
A low-pass filter (with a corner frequency of 1.6Hz) prevents zener noise from being introduced into the error amplifier.
The error amplifier is a discrete implementation of an opamp with a high open-loop gain of 102.5dB.
A long-tailed pair differential amplifier with current mirror and constant current source forms the first stage of the error amplifier. The second stage is the voltage amplification stage (VAS), also with constant current source load. The 3rd stage is comprised of the power MOSFET output devices configured as a source follower.
High-current MOSFET pass transistors.
The high current rating provides a very high safety headroom against overcurrent damage.
The negative temperature coefficient of MOSFETs prevents damaging thermal-runaway conditions that may plague conventional BJT devices.
Use 30VA R-Core Transformer, can provide powerful energy supply.
Use audio dedicated capacitors.
Using 4MM aluminum plate, can provide firm installation and sufficient heat dissipation..
Use gold-plated socket/components.
Do not short the output terminal to discharge capacitor, otherwise it will damage the power board.
Product configuration
After soldering the upgrade module, we have tested the key point voltage, and employ the electronic load meter and the oscilloscope for double testing.
OPPO UDP-205Linear Power Supply Module 1PCS.
Does not provide any wires.
Our shop provides hiend cables for you to buy.
Pics
All-discrete topology.
No IC (integrated circuits) are used.
Use audio dedicated capacitors.
Rubycon RX30 2200uF X9 PCS
Use gold-plated socket/components
Using 4MM aluminum plate, can provide firm installation and sufficient heat dissipation.
Use 30VA R-Core Transformer, can provide powerful energy supply.
Product information last updated on January 11, 2026