Onkyo DX 6850=DX 706 upgrade - Page 3 - diyAudio
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Old 21st February 2012, 06:26 PM   #21
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Hi Guys
I finished to upgrade the (6850-706) to a (6870-708)
In a few days I will compare the sound of my 6850 with a genuine (6870-708)
What I have made inside:
I change the two capacitor C905 C906 2200u/25v with Nichicon Fine Gold 2200/25v install another two C917 C918 near the old one because the PCB is the same like 6870, remove two tap and install another bridge rectifier D902. After that I install a new Vanguard TCXO 16.9344MHz 0.3ppm and remove the old quartz Vanguard Ultra precision Golden TCXO, 0.3ppm 16.9344MHz | eBay
I populate the pcb with the exact components like in 6870 including the OPTOCOUPLER
Install C969 C970=470u/50V Nichicon change the C967 C968 470u/50v with Nichicon change the C955 954 4700/25v with 4700/35V also Nichicon Fine Gold.
Change the C415 C416 220uf/25v with 470u/50v. The last capacitors change was C461 C462 470u/25V with new Nichicon 470/50v bypass with VISHAY ROEDERSTEIN - MKP18374 0.1u/160v.

Soon I will make test between Onkyo 6850 upgraded vs 6870 vs CEC TL51XR vs Yamaha CD S2000.
I will post here the results (my opinion).
Best regards
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Old 21st February 2012, 07:28 PM   #22
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Okay I will wait for your next comments. thanks
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