20 Most Recent OKI MICROLINE 320 Matrix Printer Questions & Answers

There should be a small ratchet lever to the side of the printer which adjusts how close to the roller the printhead sits. If you adjust this in a notch or two it should move it closer so that it strikes the paper a bit harder. If you move it too far it will smear the top page so try it 1 notch at a time.

If the missing spot is always the same it sounds like a broken pin in the print head. If this is the case you need to replace the print head.

What driver are you using, you should try the IBM Proprinter Driver.Hope this helps.
Dezzi

change your printer head.

Yes you can change the I.C with a standard IBM firmware.
Dezzi

use the HP laserjet 4 or 4000 print driver. this is the most basic print driver and has played nicely with the older printers

try these links for a user manual: ML1190eco User Guides Manuals http://www.manuals365.com/oki/ml11uen2_tcm3-45862-manuals365.html

I have this manual for you on page 37 for changing font. https://files.support.epson.com/pdf/fx890_/fx890_u1.pdf

have you checked the wall socket , try another wall socket , try another power cord ,and check if all is switched on