[Guillaume Gonzalez]

Replacing 8IC1 finally solved the problem; the sound is finally back! Thank you so much for your help.

[Guillaume Gonzalez]

Le remplacement de 8IC1 a résolu le problème, le son est enfin de retour !

[Guillaume Gonzalez]

Thanks again for your help.
I’m going to replace 8IC1 that I’ve already ordered and see how it goes.
Otherwise, I’ll replace the relay.
I’ll keep you posted.

It’s definitely a pleasure to finally hear some sound from the turntable

[Guillaume Gonzalez]

Si ça peut aider

Après avoir remplacé 8D2 et 8C1, je me suis aperçu d’un problème de connexion à la masse du relais de sourdine.

En soudant un fil entre la masse du relais et celle du connecteur P9, le son revient.

Je soupçonne maintenant 8IC1 que je vais prochainement remplacer

[Guillaume Gonzalez]

I’ve made progress on the circuit board.

After replacing 8D2 and 8C1, I realized I have a problem with the relay’s ground connection. When I solder a wire from the relay’s ground to the ground of connector P9, the sound returns.

Could this be caused by 8IC1?

Thank you for your help.

[Guillaume Gonzalez]

It seems that 8d2 is fried.

I’m going to replace both of them, we’ll see.

[Guillaume Gonzalez]

Thank you again so much for your help.

I’m going to change the 100mf cap because it looks worn out.

[Guillaume Gonzalez]

I finally managed to take the measurements
According to this picture

Tonearm raised, I get

• 1 -> 30.7 V CC*
• 2 -> 21.7 V CC
• 9 -> 0.7 V CC

Tonearm sets down, I get

• 1 -> 28.8 V CC*
• 2 -> 21.7 V CC
• 9 -> 15 V CC

I also played with TR2 and I don’t get the impression that it has any effect on the circuit.

Can I try powering the relay with an external battery when the turntable is on?

Thank you for the time you are dedicating to my problem.

• This reply was modified 1 month, 1 week ago by Guillaume Gonzalez.

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[Guillaume Gonzalez]

Okay, thank you very much.

I’ll test all of that.

[Guillaume Gonzalez]

Hi,

I think you’ve found the source of the problem.

The relay doesn’t click when the arm sets down.

I tested it by powering it directly and it clicks correctly, so I think there’s a power supply issue on the PCB 8 board.

Any idea what I should test?

Thanks

[Guillaume Gonzalez]

Hi

Thanks for your replies.

I tested it with the 2402 cartridge.

I also tested the relay and can hear it clicking.

However, I didn’t notice if it clicks when the tonearm sets down.

I’ll test it tomorrow and let you know.

Thanks

[Guillaume Gonzalez]

Pour ceux que ça intéresse, j’ai changé la lampe et celà n’a pas résolu le problème…

[Guillaume Gonzalez]

Bonsoir et merci pour vos retours

Sur ma platine pas de pré ampli mais comme la BG 2402 fonctionne normalement avec l’ampli, je ne pense que le soucis vienne de ça.

J’ai également testé la continuité du câble et il a l’air bon, j’ai également essayé une autre cartouche

Je n’ai pas de connaissances poussées, mais comme il s’agit d’un son acoustique et après les heures passées sur les forums, j’ai le sentiment que le soucis viendrais du “muting circuit”.

D’ailleurs en refaisant le tour cet après-midi, je me suis rendu compte que la lampe de suivi située au pied du chariot est grillée.

 

Celà pourrait-il mettre la platine en mute

Merci beaucoup pour le temps que vous m’accordez

 

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