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There are no head alignment software for dot-matrix printer (unlike inkjet printer do have and easily to configure)
No solve?
Unfortunately, there is a solve....easily done (might need to waste a few sheets of paper)
Press Tear-OFF switch while switching on the printer, this will make the printer prints a long list of internal configuration. Get use to switch function and get yourself to System Configuration and change as follows:
Set Bi-D to Uni-D.
Tada...Done!