Music turn down after a while... [resolved]

davidnow · 5384

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Offline Paul Birkeland

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Reply #15 on: July 21, 2021, 03:25:00 PM
The 0.09V side likely needs a new TL431 installed.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline davidnow

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Reply #16 on: July 22, 2021, 12:48:11 AM
Thank you Paul, I will do so ASAP and let you know


Offline davidnow

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Reply #17 on: July 22, 2021, 01:15:08 AM
Do you mean LM431?


Offline davidnow

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Reply #18 on: July 22, 2021, 01:29:52 AM
Or is it the same?


Offline Paul Birkeland

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Reply #19 on: July 22, 2021, 05:55:22 AM
They are the same.

Paul "PB" Birkeland

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Offline davidnow

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Reply #20 on: July 22, 2021, 07:48:01 AM
Thank you Paul
I have replaced the TL431. Now Kreg are 1.4V and 1V (without 12AU7)
With 12AU7, voltages on MJE5731A are 217V and 218V.
Sounds good?


Offline Paul Birkeland

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Reply #21 on: July 22, 2021, 08:51:56 AM
Yes, those are within tolerance.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline davidnow

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Reply #22 on: July 22, 2021, 08:06:30 PM
I had the C4S board reconnected and all the voltages are now within specs, thank you very much!
David


Offline davidnow

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Reply #23 on: July 23, 2021, 11:21:24 PM
To finish the story i think i figured out what was wrong with my Eros, i mean with the first problem : music stops after a while.
I manage to make it occur with Eros upside down. No voltage on the IEC power entry module. When i turned a bit the chassis, the diodes began to glow... It appears there was a bad connection, probably with the fuse. I changed the IEC and now i can listen to music stressless!
Thank you again for your help
David


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