Epson GT-6500 EN - Manual (Page 219)

ES-600C
The ES-600C has one bank of DIP switches on the front of the
scanner. The table below shows the function of each switch and
the preset factory settings. The shaded boxes show the factory
settings.
DIP switch 1 settings
Switch No. Function ON OFF
SW 1-1 Self test ON OFF
SW 1-2 Self test mode Color Monochrome
SW 1-3 Self test mode Line Page
SW 1-4 Not used -
SW 1-5 Not used -
SW 1-6 Not used -
SW 1-7 Not used -
SW 1-8 ES-600C emulation ON OFF
Scanner Model Technical Data B-37