FYI, I Have decided to sell my modified machine.
You can search under my username to see the list of my modifications, or check out my listing on audiogon.
It has been an excellent machine, and thanks all for your participation in the modification effort…
Eric
You can search under my username to see the list of my modifications, or check out my listing on audiogon.
It has been an excellent machine, and thanks all for your participation in the modification effort…
Eric
Havent even started on mine yet.Have to say even un modded its a brilliant player.
I actually look at it as a cd player first that happens to play blue rays.
best bit of gear I have ever purchased.
Smiffy
Yes I just love my OPPO. It really does sound nice. Digital to a new level. I can't listen to vinyl any more. Damn but the re-mastered 1990's stuff is really really good.
I agree: Best bit of gear I have purchased.
I agree: Best bit of gear I have purchased.
Hello.
I have almost stock output (changed opamps and some caps in unbalansed circuit).
Recently I've assembled Ciuffoli power follower (sounds great, the Power Folllower) - it needs output swing not lower than 10Vrms and Rout < 1000Ohm.
What balansed and unbalansed output for OPPO 105 would you recommend to match that follower?
I have almost stock output (changed opamps and some caps in unbalansed circuit).
Recently I've assembled Ciuffoli power follower (sounds great, the Power Folllower) - it needs output swing not lower than 10Vrms and Rout < 1000Ohm.
What balansed and unbalansed output for OPPO 105 would you recommend to match that follower?
Power supply little mod.The power supply diodes
Cannot see what make or model they are?can anyone help
I have lots of Schottky rectifier diodes here which I have found to be very good in audio
11DQ100 which I think are 1.1 amp at 100 piv
so should be suitable to replace D10,12,14,15,16,17,18 and 19?
Smiffy
Cannot see what make or model they are?can anyone help
I have lots of Schottky rectifier diodes here which I have found to be very good in audio
11DQ100 which I think are 1.1 amp at 100 piv
so should be suitable to replace D10,12,14,15,16,17,18 and 19?
Smiffy
1,1 A for these diodes it may be close enough to the limit. I will suggest a higher current for safety. I currently use 4A, but 2A it is also a good choice. You may also want to increase the capacity of the filtering caps...
Coris,
You who knows everything about Oppo's makings would you have happened to find any technical details on the Sonica DAC - beyond the little found on the web?
Cheers,
Nic
You who knows everything about Oppo's makings would you have happened to find any technical details on the Sonica DAC - beyond the little found on the web?
Cheers,
Nic
Well, I do not know just everything about Oppo products...😉 I may know a little bit more than others, as I investigated these products in details...
In case of Sonica DAC I know so far only what it is available as informations on web.
If you will ask me what I presume, then I could answer that this DAC it have to be developed around the last Sabre Pro chip edition, and maybe using the ESS regulators designed for this Pro series DAC chip as well...
In case of Sonica DAC I know so far only what it is available as informations on web.
If you will ask me what I presume, then I could answer that this DAC it have to be developed around the last Sabre Pro chip edition, and maybe using the ESS regulators designed for this Pro series DAC chip as well...
Power decoupling caps on ESS 9018
CE37,39,40 and 41 all at 220uf 25v.
Is 6.3v enough for those caps.Wondering if Oscons would be better then black gates?
Also CE1,2,3,4,24 and 25 decouple op maps?
What do CE22 CE44,48 and CE150 do?
Got a great pile of unused Black gte FKs,Ns and NXs here I could use
Smiffy
CE37,39,40 and 41 all at 220uf 25v.
Is 6.3v enough for those caps.Wondering if Oscons would be better then black gates?
Also CE1,2,3,4,24 and 25 decouple op maps?
What do CE22 CE44,48 and CE150 do?
Got a great pile of unused Black gte FKs,Ns and NXs here I could use
Smiffy
CE37,39,40 and 41 it can be 6v rated. Much higher capacity is better.
The caps around opamps are decoupling/filtering for +/- power rails, and it should be 16v rated. As higher capacity, as better.
CE22 it filter the opamps offset voltage (6v rated). CE44 is AVCC out (6v rated). CE48 it should be as it is. CE150 it filter the AVCC regulator input (16v rated).
The caps legs should be shortest as possible.
The caps around opamps are decoupling/filtering for +/- power rails, and it should be 16v rated. As higher capacity, as better.
CE22 it filter the opamps offset voltage (6v rated). CE44 is AVCC out (6v rated). CE48 it should be as it is. CE150 it filter the AVCC regulator input (16v rated).
The caps legs should be shortest as possible.
Many thanks Coris
I have lots of black gates and millions of os con caps.I like os cons in digital power supply decoupling and black gates in analogue de coupling and signal.
Smiffy
Sorry to be a pain Coris but I only have the Audio schematic and not the power supply so if ok can I ask about a few other caps?
Or does anyone on this thread have the power schematic?
Smiffy
Or does anyone on this thread have the power schematic?
Smiffy
Have poked around a bit more in the 105D
Can't change the 54Mhz crystal.Eyes are not what they used to be.Do not want to risk killing the pcb.
iv op amps run off +-12v.Output op amps off +-15v
Feedback resistors differ on either side of IV op amps but that's been noted in the thread already.Not enough knowledge to know why.
CE1 and 2 decouple U24 iv stage right CE3 and 4 decouple iv stage left.C 24 and 25 decouple U18 output stage.
Switching over to balanced outputs CE62 and 65 decouple first right stage and CE13 and 14 decouple output right
CE63 and 64 decouple first left stage and and CE10 and CE45 decouple output left.
If the above is correct(poss not)then what does CE71 do?(next to ribbon cable to 7.1 board)
Are CE106 and CE107 on the outputs of the LM317 and LM337?or possibly adjust to ground?
What does CE110 (3300/50v do?
And what about CE26,30,46 and CE 5,34 and 12? 1000/25v
Will measure DC offset and poss remove output caps.Some XLR cables on the way to try balanced output into Musical Fidelity F16 power amp
Smiffy
Can't change the 54Mhz crystal.Eyes are not what they used to be.Do not want to risk killing the pcb.
iv op amps run off +-12v.Output op amps off +-15v
Feedback resistors differ on either side of IV op amps but that's been noted in the thread already.Not enough knowledge to know why.
CE1 and 2 decouple U24 iv stage right CE3 and 4 decouple iv stage left.C 24 and 25 decouple U18 output stage.
Switching over to balanced outputs CE62 and 65 decouple first right stage and CE13 and 14 decouple output right
CE63 and 64 decouple first left stage and and CE10 and CE45 decouple output left.
If the above is correct(poss not)then what does CE71 do?(next to ribbon cable to 7.1 board)
Are CE106 and CE107 on the outputs of the LM317 and LM337?or possibly adjust to ground?
What does CE110 (3300/50v do?
And what about CE26,30,46 and CE 5,34 and 12? 1000/25v
Will measure DC offset and poss remove output caps.Some XLR cables on the way to try balanced output into Musical Fidelity F16 power amp
Smiffy
There is no leaked any original schematic about the power system of 105/105D
CE110 is the first filter after rectifier bridge for 7,5v ("5"v), mainly used to power the DACs.
CE106, CE107 are placed before LM317/337 (should be 16v rated minimum). Filtering after these regulators are the many caps all over the board in the analogue stage (post DAC) area.
CE26,30,46 are placed before DAC regulators, and CE 5,34,12, after.
CE71 it filter 3,3v rail for digital stage (not necessary replacement).
The 54Mhz chip (Darbee processor clock) is not a crystal, but an oscillator. Not the first priority for replacement... A fully modded (improved) player will never need the use of this Darbee processor... The picture quality it will be however better without Darbee activated...
CE110 is the first filter after rectifier bridge for 7,5v ("5"v), mainly used to power the DACs.
CE106, CE107 are placed before LM317/337 (should be 16v rated minimum). Filtering after these regulators are the many caps all over the board in the analogue stage (post DAC) area.
CE26,30,46 are placed before DAC regulators, and CE 5,34,12, after.
CE71 it filter 3,3v rail for digital stage (not necessary replacement).
The 54Mhz chip (Darbee processor clock) is not a crystal, but an oscillator. Not the first priority for replacement... A fully modded (improved) player will never need the use of this Darbee processor... The picture quality it will be however better without Darbee activated...
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Many thanks Coris
I will replace CE110 with a 4700uf 16v standard black gate and CE26,30,46,5,34 and 12 with 1000uf 16v os con caps.
Then let them burn in and see what I think before going any further.
Then change CE106 and 107 to Black gate N 1000uf 25v
Yes it is an oscillator.but I was very tired last night and forgot how to spell oscillator.ha ha.
Thanks again Coris.
I will replace CE110 with a 4700uf 16v standard black gate and CE26,30,46,5,34 and 12 with 1000uf 16v os con caps.
Then let them burn in and see what I think before going any further.
Then change CE106 and 107 to Black gate N 1000uf 25v
Yes it is an oscillator.but I was very tired last night and forgot how to spell oscillator.ha ha.
Thanks again Coris.
The idea about these filtering caps is to push the capacity at max possible (for available dimensions), while lowering the rated voltage at lowest safe. The high capacity it have important impact over the power quality, and ESS9018 is very sensible at the power quality, when about its outputted results...
CE110 it will never work at more than max 8v. Why use there a 16v rated cap? It is much worth to use the 6v (10v rated cap) difference to gain more in capacity for the same dimensions....
CE110 it will never work at more than max 8v. Why use there a 16v rated cap? It is much worth to use the 6v (10v rated cap) difference to gain more in capacity for the same dimensions....