Epson 3000 Manuel D’Utilisation

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Setting the DIP Switches
By changing the settings of the two sets of DIP switches inside the
compartment on the right top and side of the printer, you can
control various printer features, such as the character set and page
length. These new settings become effective whenever the printer is
turned on, reset, or initialized.
Changing 
a DIP-switch 
setting
1. Make sure the printer is turned off.
2. 
Remove the compartment cover.
Using the Printer 3-5