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Technic SA 300 How to find network resistor needed in RIAA / Phono

Hello all !
My name is Gilles.
I'm french , so excuse me for my bad english...

So i try to repair the phono part of this receiver/amp.
But i cannot find the component combination (resistors + capas) Z401 and Z402 (referenced in the Technics manual ) EXA6SD01C.
In fact it is Matsushita component with reference 6SD01 .. But i can't find it in the net...
If anyone can help...

Thansk a lot !

Gilles



Re: Technic SA 300 How to find network resistor needed in ...

I seriously doubt you will be able to find that module; if you did, it would be as old as the originals in your amplifier. Fortunately, the values are listed on the schematic; there are 4 capacitors and 2 resistors in that network: 680, 68, 150 and 680 pf and 180 and 270 ohms. I think you will have to make that network with discrete components. 50 volt capacitors and 1/4 watt resistors will do.

Re: Technic SA 300 How to find network resistor needed in ...

Thanks for you response. !
I had the same idea.
However i think this internal compoents are not fragile (ceramic capacitor and resistors must be ok).
I have ordered the others ic (TA72129) and i will replace the electrolytic capacitors (which are more sensible to the lifetime).

For information, the issue i have is that the right channel is a bit less loud and has a little less treble .

Gilles