Easiest way to test if TDA 7294 chip is dead

[El Wizardo]

Do You have the control pod too or only the sub ? There is a thread here regarding powering those speakers without the pod. Bear in mind that although the rail voltages could be powering the chip, You need a control voltage on the standby or mute pin in order to hear something... and I own one and I am very satisfied with the speakers.

Only sub, and yes i have looked that entire thread, but there were so many different configurations and way to connect them its really confusing.

But that doesnt matter anymore because one of regulators that provide +/-18v for mute/standby is broken, so im going with my backup plan and that is to provide mute/standby voltage directly from rails.

 

[gozo]

Hello, being bit noobish and all, i need your guys help !

I have recently bought Logitec Z 5500 sub and im trying to fix it ! I saw that on heatsink one amp is missing, and i wanted to check if others work, but i dont know how to see if they are dead or problem is somewhere else.

Any easy tactics i could test it ?

i know hw to test it