Initially after the amp stopped working, I checked the external fuse, which was fine. Then after opening her up I found the two slow blow internal fuses had gone. These I replaced, and now the external fuse keeps blowing whenever I switch the power on. Could both problems be symptomatic of a faulty transformer, and how could I trouble shoot the problem. I love this amp !!
I have been told it may be a diode short in the bridge rectifier : I think I have identified the diodes of the bridge rectifier, both on the circuit diagram (attached and circled red and on the circuit board itself. I have tried to test these on the board with a multimeter - they show high resistance in one direction and low in another (as expected I think although two of them in the opposite direction to that show on the diode). Can I test them in line and would this be the correct test ?
Secondly I have been told that the capacitor on the supply side of transformer may be at fault. (circled blue on attached diagram and also photograph) . I do not have a capacitor tester, so do I have to remove these from the board to test with a multimeter, and if so would it be the restistance changing that I'm looking for?
Finally if it is these capacitors (which in circuit reed a sready resistance of 1 / infinite) where could I get a couple ?
Many thanks for any idea/ help/ cleaaring up my ignorance of the whole thing
I have been told it may be a diode short in the bridge rectifier : I think I have identified the diodes of the bridge rectifier, both on the circuit diagram (attached and circled red and on the circuit board itself. I have tried to test these on the board with a multimeter - they show high resistance in one direction and low in another (as expected I think although two of them in the opposite direction to that show on the diode). Can I test them in line and would this be the correct test ?
Secondly I have been told that the capacitor on the supply side of transformer may be at fault. (circled blue on attached diagram and also photograph) . I do not have a capacitor tester, so do I have to remove these from the board to test with a multimeter, and if so would it be the restistance changing that I'm looking for?
Finally if it is these capacitors (which in circuit reed a sready resistance of 1 / infinite) where could I get a couple ?
Many thanks for any idea/ help/ cleaaring up my ignorance of the whole thing