Hi,
Again check the base or the gate of the output transistors with power. If it read zero means that one or all of your power transistors are bad. If you want remove one a time and see if the problem goes away. In this way you probably find the bad one. If you do this test do not raise the volume too high that you can burn the remaining of the transistors. I do not know how old it is this amplifier but at this point I will replace all the output transistors for the bad channel since you are reading 40 volts in the speaker output for the channel.
Again check the base or the gate of the output transistors with power. If it read zero means that one or all of your power transistors are bad. If you want remove one a time and see if the problem goes away. In this way you probably find the bad one. If you do this test do not raise the volume too high that you can burn the remaining of the transistors. I do not know how old it is this amplifier but at this point I will replace all the output transistors for the bad channel since you are reading 40 volts in the speaker output for the channel.
The output transistors are fine so are the drivers for that channel ITS NOT the Outputs or drivers since i can put them in the left channel and get no problems
Hi,
If you removed the transistors the problem with the 40 volts to the speaker goes away where the voltage come from. When you removed the transistors did you check the voltage at the speaker terminal?
If you removed the transistors the problem with the 40 volts to the speaker goes away where the voltage come from. When you removed the transistors did you check the voltage at the speaker terminal?
How would the outputs or drivers be defective if i remove them from the bad channel and put them in the working channel and the working channel still is fine and has no problems
It is possible that you have a solder bridge between the transistors pins and the 40 volts. The only way that the output transistor can output a voltage is by feeding a voltage at the base. Other than that the voltage it is feeding from outside of the transistor circuit. Check the output transistor circuit for a possible solder bridge. Better do a resistance check from the +40 volts to the speaker output to see if you have a short.
Did you check the bias transistor?
It will have its collector connected to the base of one driver and its emitter connected to the base of the other driver.
You need to confirm that it has two good junctions as well as checking it for shorts or leakage.
It will have its collector connected to the base of one driver and its emitter connected to the base of the other driver.
You need to confirm that it has two good junctions as well as checking it for shorts or leakage.
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