Epson Stylus Pro 4900/Epson Stylus Pro 4910  Revision A
ADJUSTMENT  Boards Related Checks and Adjustments  385
Confidential
4.14  Boards Related Checks and Adjustments
4.14.1  RTC&USB ID
EXECUTION MODE
Serviceman Mode
WRITING RTC&USB ID PROCEDURE
1. Turn the printer ON in the Serviceman Mode.
Turn the power ON while pressing [Menu  ] + [Paper Feed  ] + [OK].
2. Start the Service Program and select RTC&USB ID.
3. Verify or input the date and time.
4. Input the 10-digit serial number of the printer.
USB ID is automatically created according to the serial number.
5. Click [Write] to input the RTC onto the NVRAM on the new Main Board.
6. Click [Finish].
7. Turn the printer OFF.
U
Figure 4-95.  [RTC&USB ID] Screen
C A U T I O N
If the printer is turned OFF and back ON after changing the USB 
ID, the computer (Windows) detects the USB port used to connect 
the printer as a new port and automatically copies the printer 
driver as xxxx (Printer Name). If you need to perform another 
adjustment using this tool, select the “copy x” driver next time.