CD tweak
Main Content Date
My first tweak was an Onkyo DX7711 Integra CD-player.
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Left This is the Onkyo DX7711 Integra CD player inside, originally.
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Left
The original power cord and AC inlet.
Right The modified AC inlet: IEC socket with filter Toroid transformer also added for analog stage. The transformer is rated for 60VA, 2x15V |
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Left
The disassembled PCB Right In the middle of upgrade. Most of the resistors and Silver Mica capacitors installed. ELNA Cerafine output capacitor also installed, muting transistors out. |
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Left
The original analog stage. Right The schematic of analog stage (one channel shown) |
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Left
The opamp modules assembled to PCB. The opamp is OPA627 AU
Right The assembled opamp modules offline. Each module consist 2 pcs OPA627 and 2pcs 100nF 0805 size ceramic capacitors. |
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Left The back side of the PCB. For many capacitors (Silver Mica and Elna Cerafine) only here was enough place. |
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Left
The DACs and receiver IC are shielded by 3M shielding tape (# )
Right The upgraded PCB, before assembly |
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Left
The assembled CD player
Right Some details... |
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What is done additionaly?
- All PS diodes replaced with OnSemi MUR series ultrafast diodes
What is left?
- DAC clock modification (kwak Clock 7 probably)
- Regulator upgrades (Walter Jung regulator)
- PS capacitor change (Black Gate)
UPDATE COMING SOON!!!
Components:
- Elna Cerafie capacitors
- Holco H2 and H2 audiophile resistors
- AD825 opamps
- MUR815 high ultrafast diodes
- Toroidal transformer for analouge stage
- IEC filter AC inlet
Future plan:
- Pass D1 analouge stage... :)
All the things here only for DIY Audio hobby. Not for commercial use!