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Copyright © 2007, 2008 AudioNote Kits
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First measure from B+ to GND on the M2 PCB (use the
ground point closest to the LED section).
You should read approximately 260v DC.
Now measure the filament voltages - these are the
connections labeled +6V2- on top of the PCB.
These should be approximately 12v DC.
If there is a problem with any of the above voltages, switch
to AC volts and measure the 300 300 points on the M2
PCB – you should get somewhere over 600V AC.
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