6.4. Ground lifting using the VP-200VX Power Amplifier Input Module
When operating the system, hum noise may be generated by a ground loop accidentally created in the
system. The ground loop can be cut off with the Ground Lift jumper connector setting on the VP-200VX
board.
To access the Ground Lift jumper connector, take out the internal VP-200VX from the amplifier.
Make sure that the system power is switched OFF before starting the work.
Step 1. Remove the Amplifier's top panel.
Step 2. Take out the VP-200VX.
Step 3. Unplug the jumper socket and plug it to the LIFT position on the VP-200VX board as shown below.
Step 4. Fit the VP-200VX back into place.
Step 5. Replace the top panel.
LIFT
LIFT
LIFT
[VP-200VX]
Factory-preset position
Ground Lift position
WARNING
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