Hey all,
Trying to repair my Musician 400 series head. Some background, I bought the amp used, gigged it for about 8 months until after a long practice, 2 or 3 hours the night before a gig, the amp started smelling really strongly of the burnt resistor smell. I thought/hoped that it was just too hot and turned it off. When I turned it back on the next day everything seemed okay, until the show when it totally crapped out started sounding all crunchy and weak.
Flash forward a few months later I actually get the time to open the sucker up I can see a few fried caps in the power amp section and some burn marks on the old cement resistors. I change out the some caps and things sound pretty good, there is still a bit of hum on the effects section of the pre amp, but the normal section sounds great, all the output levels look good, no DC going to the speaker or anything.
I turn it up and start pushing it hard and it still sounds good, but the light bulb limiter I have the amp plugged into starts to light up. The louder I play the brighter the light bulb gets, but when the amp is just on, or I am playing with the volume at 50% or less it's fine. What could be going on? is this normal? This is my first repair and I can't find anything about something like this on the web.
Trying to repair my Musician 400 series head. Some background, I bought the amp used, gigged it for about 8 months until after a long practice, 2 or 3 hours the night before a gig, the amp started smelling really strongly of the burnt resistor smell. I thought/hoped that it was just too hot and turned it off. When I turned it back on the next day everything seemed okay, until the show when it totally crapped out started sounding all crunchy and weak.
Flash forward a few months later I actually get the time to open the sucker up I can see a few fried caps in the power amp section and some burn marks on the old cement resistors. I change out the some caps and things sound pretty good, there is still a bit of hum on the effects section of the pre amp, but the normal section sounds great, all the output levels look good, no DC going to the speaker or anything.
I turn it up and start pushing it hard and it still sounds good, but the light bulb limiter I have the amp plugged into starts to light up. The louder I play the brighter the light bulb gets, but when the amp is just on, or I am playing with the volume at 50% or less it's fine. What could be going on? is this normal? This is my first repair and I can't find anything about something like this on the web.