client has already sent this one in once for warranty repair - he'd rather not again.
called fender and they are mum on documentation - just want you to send it back.
im 95% certain its the fet-controlled variable voltage - the screens are at 0V and grids at -3V. the fet is cold when the amp is running and there is a 7912 near the bias circuit that is reading all kinds of crazy things but not -12V! without the schematic though i dont wanna poke around blindly -
anyone have any thoughts? or have worked on these? or have a schematic?!
called fender and they are mum on documentation - just want you to send it back.
im 95% certain its the fet-controlled variable voltage - the screens are at 0V and grids at -3V. the fet is cold when the amp is running and there is a 7912 near the bias circuit that is reading all kinds of crazy things but not -12V! without the schematic though i dont wanna poke around blindly -
anyone have any thoughts? or have worked on these? or have a schematic?!
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