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Logitech z506 No Sound. It powers ON

iomangage

Jul 16, 2022
2
Joined
Jul 16, 2022
Messages
2
Hi Everyone. Need help fixing z506 for no sound problem. None of the inputs work. Though if i touch on inputs of the STA540 ic. The speakers respond properly. The circuit is full of KS4558 op-amps. If any one has scematics for this circuit or a service manual. The circuit says 'Everest z506 amp'.
 

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Bluejets

Oct 5, 2014
6,919
Joined
Oct 5, 2014
Messages
6,919
Could be input problem....simple audio injector would be a useful tool...enty of places show how to make one.
 

iomangage

Jul 16, 2022
2
Joined
Jul 16, 2022
Messages
2
I am thinking of bypassing the whole op amp sections and manually create inputs for each channel. But i will loose the ability to control volume. Or I have add potentiometer to each channel which is again a hassle.
 
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