Positions 1 to 6 of the S2 switch define the communication protocol and handshaking criteria in RS232 interface. They shall always be set to positions 1 to 4 OFF with position 5 set to ON for parallel interface application.
Position 7 of S2 alters the horizontal spacing between characters to get different print density on same font format.
Position 8 of S2 determines whether to print only in one direction of print head operation or in both directions.
All positions of S2 default to OFF when printer delivered.
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