Epson Stylus Pro 7900 - Page 236

Pro 7900 and 9900 Field Repair Guide
PCU (Plate Curing Unit) Troubleshooting Printer Component, Software Item, LCD Display, Printer Button Page 236.
2. Turn on the PCU.
Turn on the Power Switch. This switch supplies power to the PCU. The Transport Belt internal to the PCU will
start moving.
This Switch changes the direction that the Transport Belt travels.