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Oppo's BDP105 - discussions, upgrading, mods...
Oppo's BDP105 - discussions, upgrading, mods...
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Old 27th May 2018, 11:34 PM   #1801
Staudio is offline Staudio  Russian Federation
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Hello, Coris.
Is it possible to upgrade Oppo 105 with ll1684 using only one pair (one + and one -) of dac outputs?
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Old 28th May 2018, 10:12 PM   #1802
Coris is offline Coris  Norway
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Oppo's BDP105 - discussions, upgrading, mods...
Hallo Staudio
It is possible, but using two pairs the power it will increase, as the signal at the transformers outputs. I think maybe another type Lundahl should be used. Well, I haven`t yet experimented on this configuration, and I cannot know more details. However, as principle, it is possible a such setup.
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Old 28th May 2018, 10:32 PM   #1803
Staudio is offline Staudio  Russian Federation
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Quote:
Originally Posted by Coris View Post
Hallo Staudio
It is possible, but using two pairs the power it will increase, as the signal at the transformers outputs. I think maybe another type Lundahl should be used. Well, I haven`t yet experimented on this configuration, and I cannot know more details. However, as principle, it is possible a such setup.

And what configuration do you use?
Something like this?
What is R3/R4 in your version?

Click the image to open in full size.

Last edited by Staudio; 28th May 2018 at 10:40 PM.
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Old 30th May 2018, 09:56 AM   #1804
AKSA is offline AKSA  Australia
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I just put +25V into the LEFT output RCA on my Oppo 105.
Does anyone here know what might have been frazzled?
This happened because of a miswired power supply rail which left the amp input circuit hot.

Not happy!!

HD
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Old 30th May 2018, 11:17 AM   #1805
RNMarsh is offline RNMarsh  United States
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Oppo's BDP105 - discussions, upgrading, mods...
electro --- coupling cap.


-RM
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Old 30th May 2018, 11:30 AM   #1806
AKSA is offline AKSA  Australia
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Thank you Richard - appreciated!

HD
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Old 30th May 2018, 01:16 PM   #1807
Coris is offline Coris  Norway
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Oppo's BDP105 - discussions, upgrading, mods...
The damage it should not be very extended. It is important if the +25v it was grounded to the player, or not. If the zero volt of that 25v line it was not connected to the player ground, then nothing should happen. If yes, then the AC coupling caps should tolerate that voltage, and stopped it there. It depend also if the device it was on or off when that happened. If it was off, then the low ohm resistor which the mute relay it connect to the ground, may have burned out. If the device was on, then the 25v applied on RCA it should not go further through the AC coupling cap. I suggest you start up the player and see how that channel it work (or not). I presume you was lucky this time...
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