last week my m2000 bass amp stopped working. no sound at all to the speakers, Di output only hum with more weird noises
mesa boogie has been kind enough to share schematics. after all is a discontinued product.... i've put in the attachments so you can reference if needed
i started checking the tubes in another amplifier, they are still working
so i took measurements of all the voltages coming from the psu. everything was spot on, apart the +15V rail which was reading 0V
took out the 7815 regulator and tested in another circuit. working perfectly
something else is causing the +15V rail to drop. the problem is there are so many IC and other components connected to the +15V rail so it makes hard to find where the problem is. i am tempted to replace all the ICs but maybe there is a better way to follow
do you have any suggestion?
thanks in advance
mesa boogie has been kind enough to share schematics. after all is a discontinued product.... i've put in the attachments so you can reference if needed
i started checking the tubes in another amplifier, they are still working
so i took measurements of all the voltages coming from the psu. everything was spot on, apart the +15V rail which was reading 0V
took out the 7815 regulator and tested in another circuit. working perfectly
something else is causing the +15V rail to drop. the problem is there are so many IC and other components connected to the +15V rail so it makes hard to find where the problem is. i am tempted to replace all the ICs but maybe there is a better way to follow
do you have any suggestion?
thanks in advance
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