Epson MR Series Technical Reference Manual page 215

6. Disconnect the wire shorting pins 14 and 15 on the power supply's 20-pin connector.
Check that the power is off. If the voltages are not normal, replace the power supply.
Power Supply Cable's Voltage Check (*)
Measurement terminals
1
Shell
This connector is used to connect the display (DM-M820) to an external power source. The above
illustration indicates the connector connected to the display directly.
Rev. I
Signal name
+12 VDC
Frame GND
MR Series Technical Reference Manual
top of the
connector
Shell
Power supply connector
Troubleshooting 8-25