hi i wonder if one of you could help with the attached as im trying to understand something
in the attached you see the 2 main secondary outputs to the main board on this nad 3130 amp
im kind of getting to understand things a bit now, but one thing here i dont understand, unless there is a mistake, is why the ac voltage appears to go straight out to circuit(circled in red) where the other one (circled in black) goes only through the rectifier, as i would have expected it to do.
many thanks
in the attached you see the 2 main secondary outputs to the main board on this nad 3130 amp
im kind of getting to understand things a bit now, but one thing here i dont understand, unless there is a mistake, is why the ac voltage appears to go straight out to circuit(circled in red) where the other one (circled in black) goes only through the rectifier, as i would have expected it to do.
many thanks
Attachments
There's a feed through a separate diode from the red circled AC - this is probably to a 'AC power present' circuit so as to mitigate turn on/off thumps.
Control power supply from the transformer, bypassing the amplifier power supply. Analogue of STB without separate power supply.