Roland VersaCAMM VP-540 Service Notes page 118

Remove the 4 screws as shown in the figure and replace
7
with the new SW Power Supply.
Connect all the cables to the SW Power Supply.
Set the output voltage of SW Power Supply to +41V.
8
1. Disconnect the connector on the Servo Board.
Make sure to disconnect the connector.
2. Turn on the main power.
Use the Digital Multi-Meter that can measure
the direct voltage.
3. Put the black probe into CN51-1pin (GND) and the red
probe into CN51-6pin (Vout) on the SW Power
Supply.
CONNECTOR
MAIN POWER SW
< Rear View >
CN51-1pin
3-55
PROBE
CN51-6pin