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Yamaha BD-S673 possible improvements?
Yamaha BD-S673 possible improvements?
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Old 13th July 2019, 02:00 PM   #1
StewartH83 is offline StewartH83  England
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Default Yamaha BD-S673 possible improvements?

I have recapped the PSU with Panasonic FR and replaced large 68uF cap with Rubycon 82uF same voltage. They had those unreliable Capxon caps that I hate and the picture quality was too dark and glare was ridiculous. Much better quality now and has made me decide not to get a better player

I replaced the Jamicon caps with Elna Silmic 2s,i had to put two under the board as the original solder just wouldn't come off and was a bit of a pain

Bitumen some parts of the chassis not too near high heat areas with good improvement

Anything I can do with it to improve it more? I don't mind putting some money into it

Thank you
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Old 13th July 2019, 02:01 PM   #2
StewartH83 is offline StewartH83  England
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More pics
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Old 19th July 2019, 08:29 PM   #3
madis64 is offline madis64  Estonia
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Have you looked at its schematics?

It seems to use PCM5102 to provide analogue output.

From its datasheet:

"Zero Data Detect
The PCM510x has a zero-data detect function. When the device detects continuous zero data, it enters a full
analog mute condition.
The PCM510x counts zero data over 1024LRCKs (21ms @ 48kHz) before setting analog mute."

Why not jump the output muting stage?

And 2,2nF on output socket (C312/313) I would definitely remove (if it were "my THT domain")
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Old 19th July 2019, 09:52 PM   #4
StewartH83 is offline StewartH83  England
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Hello madis64

I have not seen the schematics and can't seen to find them
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Last edited by StewartH83; 19th July 2019 at 09:55 PM.
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Old 19th July 2019, 10:33 PM   #5
StewartH83 is offline StewartH83  England
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I managed to download the schematics from hifi engine.

I see those two caps.

Looks like they are in parallel so can they just be removed?

Thanks for your help, really appreciate it indeed
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Old 20th July 2019, 08:05 AM   #6
madis64 is offline madis64  Estonia
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Quote:
Originally Posted by StewartH83 View Post
I see those two caps.

Looks like they are in parallel so can they just be removed?
These caps are from output signal to ground - one for left and one for right channel. If it were my player then I would try to remove them (can depend on one's soldering skills) and see if it improves anything.
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Old 20th July 2019, 11:06 AM   #7
StewartH83 is offline StewartH83  England
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Seems like a good idea. I should be OK removing them. I can always put it back so worth a try.

I'm waiting for the remaining caps to arrive so will try it after I install those so I can hear the differences.
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Old 23rd July 2019, 01:44 AM   #8
StewartH83 is offline StewartH83  England
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PSU finished. More than happy with the results. Those crappy caps did no justice to the player. Changed 1 220uF 25v to a Panasonic FM. A small Nichicon 10uF 50v I previously replaced to Nichicon PS 100v. A Chemi-con KY 22uF 50v I previously replaced to Nichicon PS 63v.

Most caps higher voltage than before now and no extremely dark picture and super bright sun reflections on people's heads lol sorry but that was annoying

I'm not saying I've improved the players original picture quality yet its far better and the sound quality is worth listening too with music.

Only one original PSU cap was in spec (uF) and all high ESR than they should be, only tested on cheap ESR meter.

I've enjoyed it, interesting.

I'll remove those SMD components, as suggested, tomorrow
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Old 23rd July 2019, 01:45 AM   #9
StewartH83 is offline StewartH83  England
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PSU
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