merlynski
Curmudgeon Electronicist
The black lead will clip to ground, one cap lead connects to the business end of the red lead, then the other lead of the cap is used as the probe. The AC signal passes through the cap and the DC is blocked by the cap. This is frequently required on cheaper meters, sometimes not required on better quality meters.
I got to run some errands this afternoon, will be back later. 20mV and 40mV may be too low, I suspect the signals will be between 100mVac and 2Vac ranges up to the power amp section.
The Aux input sensitivity is 150mV, which should drive the output levels to maximum rated out with the volume turned way up. We don't want to overdrive the amp into clipping. You don't need (or want) speakers connected for these tests. 30 Watts (rated max output) will be about 15.5Vrms into 8Ω. There are some approximate levels on the block diagram. More important than exact levels will be comparison between left and right channels at the same points along the signal path.
I got to run some errands this afternoon, will be back later. 20mV and 40mV may be too low, I suspect the signals will be between 100mVac and 2Vac ranges up to the power amp section.
The Aux input sensitivity is 150mV, which should drive the output levels to maximum rated out with the volume turned way up. We don't want to overdrive the amp into clipping. You don't need (or want) speakers connected for these tests. 30 Watts (rated max output) will be about 15.5Vrms into 8Ω. There are some approximate levels on the block diagram. More important than exact levels will be comparison between left and right channels at the same points along the signal path.