Unfortunately this usually means at least one of the output transistors has blown open. These larger resistors are balancing resistors and if all 6 transistors are making equal power, no RF power would be across these resistors. As soon as one transistor stops working, the unbalanced RF builds up across those resistors and smokes them.
When this happens, these are not the only resistors that usually burn up. Look around the bottom of each "pill" for a smaller, 10 ohm swamping resistor. You are likely to see at least one of these is burnt also and that means the transistor right next to it is burnt too. Lots of other things can cause this from bad capacitors to solder blobs shorting things out but this is the first place to start looking.
Unfortunately this usually means at least one of the output transistors has blown open. These larger resistors are balancing resistors and if all 6 transistors are making equal power, no RF power would be across these resistors. As soon as one transistor stops working, the unbalanced RF builds up across those resistors and smokes them.
When this happens, these are not the only resistors that usually burn up. Look around the bottom of each "pill" for a smaller, 10 ohm swamping resistor. You are likely to see at least one of these is burnt also and that means the transistor right next to it is burnt too. Lots of other things can cause this from bad capacitors to solder blobs shorting things out but this is the first place to start looking.
Unfortunately this usually means at least one of the output transistors has blown open. These larger resistors are balancing resistors and if all 6 transistors are making equal power, no RF power would be across these resistors. As soon as one transistor stops working, the unbalanced RF builds up across those resistors and smokes them.
When this happens, these are not the only resistors that usually burn up. Look around the bottom of each "pill" for a smaller, 10 ohm swamping resistor. You are likely to see at least one of these is burnt also and that means the transistor right next to it is burnt too. Lots of other things can cause this from bad capacitors to solder blobs shorting things out but this is the first place to start looking.
If your amp sounds like it has built in talk back then you are kicking it's butt. If it is louder now then the bias might need some help.Thank you I've replaced the resistors that were burning and they are still getting hot. I'm not seen anything else burning but I've noticed my audio coming across the board when I talk more than I have ever have. I'm wondering if this has to do with a bad output transistor.