My chassis ground and signal ground are NOT connected with each other. The chassis is only connected to ground pin on the IEC.
Signal ground is in a star configuration and this is the spot where the transformer's center tap of the secondaries is connected to.
Should I connect this star ground point with a wire to the neutral pin on the IEC socket?
Otherwise I see three potential ground points:
1.) Transformer's primary at the neutral IEC pin.
2.) Floating signal ground's star configuration point on the circuit board.
3.) Chassis' ground point to the ground IEC pin.
Signal ground is in a star configuration and this is the spot where the transformer's center tap of the secondaries is connected to.
Should I connect this star ground point with a wire to the neutral pin on the IEC socket?
Otherwise I see three potential ground points:
1.) Transformer's primary at the neutral IEC pin.
2.) Floating signal ground's star configuration point on the circuit board.
3.) Chassis' ground point to the ground IEC pin.
I would connect the star ground also to IEC earth.
I definitely wouldn't connect it to neutral in case L+N get swapped at the plug !
I definitely wouldn't connect it to neutral in case L+N get swapped at the plug !
Put a switch in.
I found with an MP3 player I needed the earth connected and when connected to a cd player or PC it wasn't needed and sometimes caused hum.
There are a few ways to get around the direct connection to earth.
Sometimes people use a capacitor to short out the noise to ground.
I have seen back to back diodes used too.
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