I have replaced output transistors in many different receivers and usually they function just fine afterward. Some continue to repeatedly blow the transistors. Besides merely replacing the transistors, what other steps and measures should be taken to ensure an amplifier is running properly and wont experience repeat issues with blown transistors?
Occasionally I have found that an emitter resistor associated with the bad transistor has also faulted but I believe that is a result of the transistor malfunction, not a cause. Please correct me if this is not the case.
Bias is an issue that is a bit foggy to me and can certainly cause trouble for the outputs. From reading I have done, this measurements seem to be inherent to a specific transistor pair and cant really be altered unless the manufacturer built in an adjustment circuit. In general is there a way to ensure your amps bias is set properly in lieu of a trimpot or worse yet, a handy service manual?
All thoughts and input welcome, just trying to open a conversation on a fairly common issue in hopes of educating myself and others.
Thanks!
Occasionally I have found that an emitter resistor associated with the bad transistor has also faulted but I believe that is a result of the transistor malfunction, not a cause. Please correct me if this is not the case.
Bias is an issue that is a bit foggy to me and can certainly cause trouble for the outputs. From reading I have done, this measurements seem to be inherent to a specific transistor pair and cant really be altered unless the manufacturer built in an adjustment circuit. In general is there a way to ensure your amps bias is set properly in lieu of a trimpot or worse yet, a handy service manual?
All thoughts and input welcome, just trying to open a conversation on a fairly common issue in hopes of educating myself and others.
Thanks!